Objective: To assess the actual practical attitude and knowledge of dental implants among senior dental students and general dentists graduated from some Saudi and Non-Saudi dental schools. Methods: A total of 300 sen...Objective: To assess the actual practical attitude and knowledge of dental implants among senior dental students and general dentists graduated from some Saudi and Non-Saudi dental schools. Methods: A total of 300 senior dental students and general dentists participated in the study. Hard copies of the self-designed, multiple-choice questionnaires were distributed to all participants. The questionnaire consisted of 31 questions in five parts. Data were collected and analyzed using Chi-square test and t-test, where p Results: There is a statistically significant relationship between the participants’ answers, and their dental schools. Participants’ general knowledge, training, and teaching of dental implants, as well as information about restorations retained for the dental implants, were higher among participants from Saudi dental schools than participants from non-Saudi dental schools, while the information about dental implants was higher among participants from non-Saudi dental schools than participants from Saudi dental schools. Conclusion: We conclude that the actual practical attitude and knowledge of dental implants among participants in the current study was insufficient. Therefore, dental implant education in the undergraduate curricula of dental schools surveyed should be updated to include teaching, laboratory training, and preclinical and clinical training.展开更多
AIM: To assess the failure and bone-to-implant contact rate of dental implants placed on osteoporotic subjects. METHODS: Extensive examination strategies were created to classify studies for this systematic review. ME...AIM: To assess the failure and bone-to-implant contact rate of dental implants placed on osteoporotic subjects. METHODS: Extensive examination strategies were created to classify studies for this systematic review. MEDLINE(via Pub Med) and EMBASE database were examined for studies in English up to and including May 2014. The examination presented a combination of the MeS H words described as follow: "osteoporosis" or "osteopenia" or "estrogen deficiency" AND "implant" or "dental implant" or "osseointegration". Assessment of clinical and/or histological peri-implant conditions in osteoporosis subjects treated with titanium dental implants. The examination included a combination of the MeS H terms described as follow: "osteoporosis" or "osteopenia" or "estrogen deficiency" AND "implant" or "dental implant" or "osseointegration".RESULTS: Of 943 potentially eligible articles, 12 were included in the study. A total of 133 subjects with osteoporosis, 73 subjects diagnosed with osteopenia and 708 healthy subjects were assessed in this systematic review. In these subjects were installed 367, 205, 2981 dental implants in osteoporotic, osteopenic and healthy subjects, respectively. The failure rate of dental implant was 10.9% in osteoporotic subjects, 8.29% in osteopenic and 11.43% in healthy ones. Bone-to-implant contact obtained from retrieved implants ranged between 49.96% to 47.84%, for osteoporosis and non-osteoporotic subjects. CONCLUSION: Osteoporotic subjects presented higher rates of implant loss, however, there is a lower evidence to strengthen or refute the hypothesis that osteoporosis may have detrimental effects on bone healing. Consequently, final conclusions regarding the effect of osteoporosis in dental implant therapy cannot be made at this time. There are no randomized clinical trial accessible for evaluation and the retrospectivenature of the evaluated studies shall be taken in account when interpreting this study.展开更多
AIM: To discuss important characteristics of the useof dental implants in posterior quadrants and the rehabilitation planning. METHODS: An electronic search of English articles was conducted on MEDLINE(PubM ed) from 1...AIM: To discuss important characteristics of the useof dental implants in posterior quadrants and the rehabilitation planning. METHODS: An electronic search of English articles was conducted on MEDLINE(PubM ed) from 1990 up to the period of March 2014. The key terms were dental implants and posterior jaws, dental implants/treatment planning and posterior maxilla, and dental implants/treatment planning and posterior mandible. No exclusion criteria were used for the initial search. Clinical trials, randomized and non randomized studies, classical and comparative studies, multicenter studies, in vitro and in vivo studies, case reports, longitudinal studies and reviews of the literature were included in this review. RESULTS: One hundred and fifty-two articles met the inclusion criteria of treatment planning of dental implants in posterior jaw and were read in their entirety. The selected articles were categorized with respect to their context on space for restoration, anatomic considerations(bone quantity and density), radiographic techniques, implant selection(number, position, diameter and surface), tilted and pterygoid implants, short implants, occlusal considerations, and success rates of implants placed in the posterior region. The results derived from the review process were described under several different topic headings to give readers a clear overview of the literature. In general, it was observed that the use of dental implants in posterior region requires a careful treatment plan. It is important that the practitioner has knowledge about the theme to evaluate the treatment parameters. CONCLUSION: The use of implants to restore the posterior arch presents many challenges and requires a detailed treatment planning.展开更多
<b><span style="font-family:Verdana;">Introduction:</span></b><span style="font-family:Verdana;"> I Do Biotech’s implants were developed starting in 2014. Since then,...<b><span style="font-family:Verdana;">Introduction:</span></b><span style="font-family:Verdana;"> I Do Biotech’s implants were developed starting in 2014. Since then, they obtained GMP and KFDA licenses for distribution in 2015. The main objective of this paper is to determine the survival rate of I Do Biotech implants five years after the first surgery.</span><span style="font-family:Verdana;"> </span><b><span style="font-family:Verdana;">Material and Methods:</span></b><span style="font-family:Verdana;"> 1000 implants were used on 480 prosthes</span><span style="font-family:Verdana;">e</span><span style="font-family:Verdana;">s across 10 clinics on 320 healthy, non-smoker and non-diabetic patients, chosen at random, of which 160 are male and 160 female, all in the age range of 30 to 50 years old. The failure rate was studied related to the patient’s gender, the length and diameter of the implant, anatomical location, the percentage of peri-implantitis, prosthodontic failures and the patient’s quality of life.</span><span style="font-family:Verdana;"> </span><b><span style="font-family:Verdana;">Discussion:</span></b><span style="font-family:Verdana;"> The results obtained are similar to those of Van Steenberghe D. Dieter-Busenlechner, E. Serrano Catauria and far superior to those of Sáenz Guzmán. Failure rates vary greatly from study to study due to the heterogeneity of the samples in the other research papers. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> The overall implant failure rate at 5 years is 1.7%. The factors affecting significantly the survival rate are: the implant diameter, its length and the anatomic area. Failure ratios increase significantly when the diameter or the length of the implant decrease</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;">, and when they are placed in the posterior maxilla (up to 4.3%).</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">The rate of peri-implantitis is 5.1%. The prosthodontic failure rate is 2.91%. The improvement in quality of life and satisfaction increases with the years.</span>展开更多
Objective:This study used published studies to assess the survival rate of dental implants placed in patients with bone dysplasia of the maxillofacial region.Material and methods:An electronic search without a specifi...Objective:This study used published studies to assess the survival rate of dental implants placed in patients with bone dysplasia of the maxillofacial region.Material and methods:An electronic search without a specified date range was performed using the MEDLINE,PubMed,EMBASE,Web of Science,and Cochrane databases.No gender or age restrictions were applied.Results:Eighteen publications were found that met the study’s criteria,reporting data on 18 patients with bone dysplasia including cleidocranial dysplasia(CDD),fibrous dysplasia(FD),florid cemento-osseous dysplasia(FCOD),and odonto-maxillary segmental dysplasia(SOMD),who received a total of 130 implants,an average of 7.2 implants/patient(range 1 to 16).The mean age of the patients was 36.7 years(range 15 to 70 years).For implants placed in bone dysplasia,the survival rates were 100% for patients with CDD(n=8),FD(n=5),SOMD(n=2),FCOD with implants inserted far from the lesions(n=2)and 0% for dental implants inserted within FCOD(n=1).The mean follow-up was 38.2 months(min 6,max 60).Conclusions:Dental implants placed in patients with dysplastic bone lesions show high survival rates,similar to those in the general population for CDD,FD,and SOMD.For FCOD,the failure rate was 100%.展开更多
The ectodermal dysplasias are rare diseases with hypodontia, hypotrichosis and hypohidrosis. The subject's life is considerably constrained and this from an early age, with major difficulties for the integration a...The ectodermal dysplasias are rare diseases with hypodontia, hypotrichosis and hypohidrosis. The subject's life is considerably constrained and this from an early age, with major difficulties for the integration and acceptance of conventional prosthetic occlusal rehabilitation. The use of implants is an integral part of early treatment, in the regions of stable growth, that is to say symphysis. In two childs of 5 and 6 years we have made implant-borne prosthetic rehabilitation in the maxilla and the mandible. Aesthetic and social evaluation were positive. We have restored the normal oro-facial functions for the correct development of skeletal bases. They acted as an external fixator intraoral, stimulating the growth by the function. Our question was: can we leave a child throughout his childhood and adolescence with a not suitable removable prosthesis, under the pretext of growth unfinished?展开更多
[Objectives] To explore the flexural strength of 3D printed titanium bone bionic dental implants and provide a scientific basis for the clinical application of 3D printed porous bionic bone dental implants. [Methods] ...[Objectives] To explore the flexural strength of 3D printed titanium bone bionic dental implants and provide a scientific basis for the clinical application of 3D printed porous bionic bone dental implants. [Methods] The cone-beam CT( CBCT) image information of 20 premolars extracted by orthodontic requirement was collected,and a new porous bone bionic dental implant was produced using modeling software and 3D printer. The premolars were divided into two groups( A and B). The universal testing machine was used to test the flexural strength of the two groups and the difference in flexural strength between the two groups was compared through statistics. [Results]Twenty 3D printed porous titanium bone bionic implants were accurately produced; the morphology of group A and group B were extremely similar to each other; the average flexural strength of group A was 2 767. 92 N,while the average flexural strength of group B was 778. 77 N,showing that the average flexural strength of group A was significantly higher than that of group B,and the difference was statistically significant( P < 0. 05).[Conclusions]The personalized porous structure root implants produced by 3D printing technology are very similar to the target tooth morphology,and show high accuracy and small error of production. Besides,the flexural strength of 3D printed personalized porous structure root implants can fully meet the requirements of the maximum occlusal force for dental implant restoration. It is expected to provide a scientific basis for clinical application of 3 D printed porous bionic bone tooth implants.展开更多
In this work, samples of titanium dental implants in salivary environment in the presence of certain foods were studied. 24 samples were prepared and subjected to the reactivity of certain foods for 6, 5, 6 and 7 week...In this work, samples of titanium dental implants in salivary environment in the presence of certain foods were studied. 24 samples were prepared and subjected to the reactivity of certain foods for 6, 5, 6 and 7 weeks. The ICP-MS technique was used to analyze the prepared samples. The results obtained showed no corrosion of the titanium alone in an artificial salivary medium. Significant corrosion was observed in the presence of food, which is manifested by the presence of traces of titanium in the samples.展开更多
Objective:To analyze and evaluate the clinical efficacy of different treatment options for patients with peri-implant infection.Methods:The study period was from June 2019 to June 2020.Seventy-six patients with peri-i...Objective:To analyze and evaluate the clinical efficacy of different treatment options for patients with peri-implant infection.Methods:The study period was from June 2019 to June 2020.Seventy-six patients with peri-implant infection that were treated in Stomatological Hospital of Hefei were selected as study samples.The patients were divided into a research group and a control group by random number table method in which the sample size of each group was n=38.Patients in the control group were treated with drugs combined with ultrasonic cleaning while patients in the research group were treated with guided bone regeneration combined with flap curettage.The indicators of the two groups were compared and analyzed.Results:The plaque index(PLI),probing depth(PD),and sulcus bleeding index(SBI)of the two groups after treatment were lower than those before treatment(P<0.05).There was no significant difference between the groups(P>0.05).However,the height of the implant marginal bone of the study group after treatment was higher than that of the control group(P<0.05)..Conclusion:The use of guided bone regeneration combined with flap curettage for patients with infection around dental implants promotes the fusion of bone and implants.The clinical effect was significant and this should be comprehensively promoted in medical institutions at all levels.展开更多
Titanium and its alloys are often used as substrates for dental implants due to their excellent mechanical properties and good biocompatibility.However,their ability to bind to neighboring bone is limited due to the l...Titanium and its alloys are often used as substrates for dental implants due to their excellent mechanical properties and good biocompatibility.However,their ability to bind to neighboring bone is limited due to the lack of biological activity.At the same time,they show poor antibacterial ability which can easily cause bacterial infection and chronic inflammation,eventually resulting in implant failure.The preparation of composite hydroxyapatite coatings with antibacterial ability can effectively figure out these concerns.In this review,the research status and development trends of antibacterial hydroxyapatite coatings constructed on titanium and its alloys are analyzed and reviewed.This review may provide valuable reference for the preparation and application of high-performance and multi-functional dental implant coatings in the future.展开更多
BACKGROUND Lateral window approach for sinus floor lift is commonly used for vertical bone augmentation in cases when the residual bone height is less than 5 mm.However,managing cases becomes more challenging when a m...BACKGROUND Lateral window approach for sinus floor lift is commonly used for vertical bone augmentation in cases when the residual bone height is less than 5 mm.However,managing cases becomes more challenging when a maxillary sinus pseudocyst is present or when there is insufficient bone width.In this case,we utilized the bone window prepared during the lateral window sinus lift as a shell for horizontal bone augmentation.This allowed for simultaneous horizontal and vertical bone augmentation immediately after the removal of the maxillary sinus pseudocyst.CASE SUMMARY A 28-year-old female presented to our clinic with the chief complaint of missing upper left posterior teeth.Intraoral examination showed a horizontal deficiency of the alveolar ridge contour.The height of the alveolar bone was approximately 3.6 mm on cone beam computed tomography(CBCT).And a typical well-defined'dome-shaped'lesion in maxillary sinus was observed on CBCT imaging.The lateral bony window was prepared using a piezo-ultrasonic device,then the bony window was fixed to the buccal side of the 26 alveolar ridge using a titanium screw with a length of 10 mm and a diameter of 1.5 mm.The space between the bony window and the alveolar ridge was filled with Bio-Oss,covered with a Bio-Gide collagen membrane,and subsequently sutured.Nine months later,the patient’s bone width increased from 4.8 to 10.5 mm,and the bone height increased from 3.6 to 15.6 mm.Subsequently,a Straumann^(■)4.1 mm×10 mm implant was placed.The final all-ceramic crown restoration was completed four months later,and both clinical and radiographic examinations showed that the implant was successful,and the patient was satisfied with the results.CONCLUSION The bone block harvested from the lateral window sinus lift can be used for simultaneous horizontal bone augmentation acting as a shell for good two-dimensional bone augmentation.展开更多
Generally being considered as a safe area for surgical approaches, the region between the mental foramina presents important anatomical structures. The objective of this study was to measure the dimensions of the geni...Generally being considered as a safe area for surgical approaches, the region between the mental foramina presents important anatomical structures. The objective of this study was to measure the dimensions of the genial plexus and its three-dimensional location in CBCT images, correlating the characteristics of this structure with dental presence, sex and age of patients. A total of 149 cone beam computer tomography (CBCT) scans of dentate (n = 74) and edentulous patients (n = 75) were selected, 59 male and 90 female, aged 18 - 86 years. Measurements of width and length of the genial canal were performed, and the shortest distances of the genial plexus were determined in relation to the alveolar bone crest, the buccal cortical bone and the base of the mandible. The results indicated significant differences between the dentate and edentulous groups for the mandibular canal length (p = 0.030), distance from alveolar crest (p < 0.001), and distance from buccal cortical bone (p < 0.001), with significantly higher values in dentate patients. As for gender, the distances between the genial plexus and the alveolar bone crest (p < 0.001) and the buccal cortical bone (p = 0.028) were significantly shorter for females. Regarding age, only the distance between the genial plexus and the alveolar crest showed a significant difference (p < 0.001), and the smallest values were measured in the older patients. It can be concluded that there are variations of the genial plexus in relation to gender, age and between edentulous and dentate patients. Therefore, the anterior region of the mandible, especially the midline should be observed with caution when undergoing surgical procedures, such as removal of bone grafts and installation of dental implants.展开更多
Background: Narrow-diameter implants (3.0 - 3.5 mm range) have been introduced for the replacement of teeth with insufficient bone structure and/or limited mesiodistal or interimplant spaces, and appear to offer clini...Background: Narrow-diameter implants (3.0 - 3.5 mm range) have been introduced for the replacement of teeth with insufficient bone structure and/or limited mesiodistal or interimplant spaces, and appear to offer clinical results similar to those obtained with implants of greater diameter. Studies using extra-narrow-diameter implants (2.8 mm) are scarce. Case Presentation: A 59-year-old male patient received two extra-narrow-diameter implants, 2.8 × 11 mm in the region between elements 11 and 14. Together, two 3.5 × 8.5 mm SYSTHEX®platform 4.1 implants were installed in the region of elements 15 and 16 to provide greater stability in the occlusion. Of four previous implants on the maxillary left side, one in the region between the elements 23 and 24 that was located in a very apical position and vestibularized was removed. The provisional was already installed on the elements 11, 21, and 22 with the metal cores already prepared and with the Globteck®implants in the region of the elements 23, 24, and 27. The functional and esthetic results were satisfactory. Conclusions: Insertion of extra-narrow-diameter implants of 2.8 mm in the maxillary anterior region is a reliable option in a patient with absence of elements 12 and 13, restoring masticatory function and aesthetics in the upper arch.展开更多
At present,dental implant surgery mainly relies on the clinical experience of the doctor and the assistance of preoperative medical imaging.However,there are some problems in dental implant surgery,such as narrow spac...At present,dental implant surgery mainly relies on the clinical experience of the doctor and the assistance of preoperative medical imaging.However,there are some problems in dental implant surgery,such as narrow space,sight obstruction,inaccurate positioning,and high requirements of doctors’proficiency.Therefore,a dental implant robot system(DIRS)guided by optical navigation is developed in this study,with an x-shaped tool and an irregular pentagonal tracer are designed for spatial registration and needle tip positioning strategy respectively.The coordinate system of each unit in DIRS is unified through system calibration,spatial registration,and needle tip positioning strategy.Then the surgical path is planned on the computed tomography(CT)images in the navigation software before operation.The automatic positioning method and the auxiliary positioning method can be used in the operation to achieve accurate positioning and assist doctors to complete the operation.The errors of spatial registration,needle tip positioning strategy,and the overall accuracy of the system were evaluated respectively,and the results showed that they all met the needs of clinical surgery.This study preliminarily verified the feasibility of the precise positioning method for dental surgery robots and provided certain ideas for subsequent related research.展开更多
Dental implants have spread worldwide in dentistry. The risks and complications reported are limited to local issues. However, in this case, a patient complained of systemic symptoms after dental implantation. This ca...Dental implants have spread worldwide in dentistry. The risks and complications reported are limited to local issues. However, in this case, a patient complained of systemic symptoms after dental implantation. This case report aims to demonstrate that systemic symptoms such as lumbago, shoulder stiffness, neck pain, hip joint pain, and facial pain improved after the removal of well-osseointegrated titanium implants. The results suggest that harmful electromagnetic waves received by implants affect body conditions;however, to date, the underlying mechanisms have not been identified. Therefore, further research is required.展开更多
The surface treatment is important for titanium and its alloys as promising candidates for dental implantation due to their bioinert surface.Titanium surface samples were modified using H2O2 solution at different time...The surface treatment is important for titanium and its alloys as promising candidates for dental implantation due to their bioinert surface.Titanium surface samples were modified using H2O2 solution at different times up to 72 h to boost their bioactivity.According to the results of the field emission scanning electron microscopy test,some nanostructures are formed on the surface of treated titanium samples and increased in size by increasing the time of treatment up to 24 h.After 24 h of application,the sharpness of nanostructures decreased and the micro-cracks and discontinuity in the coating surface increased.The results of the X-ray diffraction study and Raman spectroscopy revealed that anatase(TiO2)was formed on the surface of treated titanium samples.The peak intensity of Raman spectroscopy increased with an improvement in treatment time of up to 24 h and then decreased due to the discontinuity of the coating.Full wettability and ability to form apatite were reached at 6 h of treatment.It is clear that the treatment time has a significant effect on the surface treatment of titanium using the H2O2 solution.展开更多
The insertion torque of a dental implant is an important indicator for the primary stability of dental implants.Thus,the preoperative prediction for the insertion torque is crucial to improve the success rate of impla...The insertion torque of a dental implant is an important indicator for the primary stability of dental implants.Thus,the preoperative prediction for the insertion torque is crucial to improve the success rate of implantation surgery.In this present research,an alternative method for prediction of implant torque was proposed.First,the mechanical model for the insertion torque was established based on an oblique cutting process.In the proposed mechanical model,three factors,including bone quality,implant geometry and surgical methods were considered in terms of bone-quality coefficients,chip load and insertion speeds,respectively.Then,the defined bone-quality coefficients for cancellous bone with the computed tomography(CT)value of 235–245,345–355 and 415–425 Hu were obtained by a series of insertion experiments of IS and ITI implants.Finally,the insertion experiments of DIO implants were carried out to verify the accuracy of developed model.The predicted insertion torques calculated by the mechanical model were compared with those acquired by insertion experiments,with good agreement,the relative error being less than 15%.This method allows the insertion torque for different implant types to be quickly established and enhances prediction accuracy by considering the effects of implants’geometries and surgical methods.展开更多
Following the worldwide trend of developing heavy metal free materials, dental implants aren’t out of this tendency. Over the years, a number of techniques to condition the surface of dental implants have been design...Following the worldwide trend of developing heavy metal free materials, dental implants aren’t out of this tendency. Over the years, a number of techniques to condition the surface of dental implants have been designed and used such as oxide blasting, however the scientific medical community has been concerned about the use of these heavy metals which leads us to investigate and develop new conditioning techniques. The aim of the study was the analysis of the Systhex<span style="font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;"><span style="font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;"><sup>®</sup></span></span> implant surface in automatic system for the treatment of the surface with acid, where we can identify the surfaces purity level, pore size, deepness and especially the roughness proportionated by the technology of acid conditioning on the titanium surfaces of degree IV dental implants. We conclude that the automatic conditioning of acid attack promoted cleanliness, homogeneity and ideal roughness for the osseointegration process.展开更多
This study aimed to assess the systemic effect of LLLT on thyroid gland functioning and consequently on calcium regulation through Triiodothyronine (T3) and Thyroxine (T4) measurements in rabbits’ serum. A total of t...This study aimed to assess the systemic effect of LLLT on thyroid gland functioning and consequently on calcium regulation through Triiodothyronine (T3) and Thyroxine (T4) measurements in rabbits’ serum. A total of thirty two New Zealand male rabbits were randomly distributed in four groups with eight animals each: control group C (nonirradiated animals), group EI (5 J/cm2 per session), group EII (10 J/cm2 per session) and group EIII (20 J/cm2 per session). All animals underwent lower left incisor extraction followed by immediate insertion of an osseintegrated implant, providing an equality of initial clinical condition between the groups. The experimental groups were irradiated with aluminium gallium arsenide diode laser (GaAlAs, λ = 830 nm, 50 mW, CW), during 13 days at each 48 hours, totalizing 7 sessions. Laboratorial T3 and T4 measurements were done in four distinct moments (before surgical procedure, immediately after surgical procedure, after the first LLLT session and after the last LLLT session) in all animals. The results obtained showed statistically significant differences in Triiodothyronine values between the groups throughout the experiment. It was concluded that the LLLT, in the protocol of irradiation used in this study, promoted a significantly alteration on rabbits’ serum hormonal levels.展开更多
Purpose: This study investigated the attitude of patients, grouped by the Brinkman index, towards smoking by using the Kano Test for Social Nicotine Dependence (KTSND) and their knowledge of peri-implantitis. Methods:...Purpose: This study investigated the attitude of patients, grouped by the Brinkman index, towards smoking by using the Kano Test for Social Nicotine Dependence (KTSND) and their knowledge of peri-implantitis. Methods: The participants were 3093 new patients who visited the Tokyo Medical and Dental University Hospital from January 2012 to December 2013 for an oral implant. The methodology included a questionnaire about sex, age, smoking status, daily average number of cigarettes, years of smoking, knowledge of peri-implantitis, and the KTSND. The patients were grouped according to their smoking status by calculating their Brinkman index (over 200 or not): current smokers with the possibility of nicotine dependence (BI(+)CS), current smokers with no possibility of nicotine dependence (BI(-)CS), ex-smokers (ES), and non-smokers (NS). The Brinkman index is obtained by multiplying one’s daily average number of cigarettes by the number of years they have been smoking. Results: Data were collected from 2182 respondents (response rate = 71%). The KTSND scores of BI(+)CS (16.89 ± 4.26) were significantly higher than the scores of ES (11.99 ± 4.52) and NS (11.53 ± 5.01). In current smokers, there were no significant differences between BI(+)CS and BI(-)CS. The patients replied “I don’t know” about peri-implantitis most often in all groups;however, there were no significant differences between the groups. Discussion: BI(+)CS were more dependent on nicotine in social situations than the other groups were. In Japan, a Brinkman index over 200 is required for a nicotine-dependence management fee to be instituted for health insurance treatment. This is a major concern for young smokers, who may be excluded from treatment because their years of smoking are substantially less. Results revealed that there were no significant differences between BI(+)CS and BI(-)CS. Therefore, it was suggested that the Brinkman index did not sufficiently group the participants.展开更多
文摘Objective: To assess the actual practical attitude and knowledge of dental implants among senior dental students and general dentists graduated from some Saudi and Non-Saudi dental schools. Methods: A total of 300 senior dental students and general dentists participated in the study. Hard copies of the self-designed, multiple-choice questionnaires were distributed to all participants. The questionnaire consisted of 31 questions in five parts. Data were collected and analyzed using Chi-square test and t-test, where p Results: There is a statistically significant relationship between the participants’ answers, and their dental schools. Participants’ general knowledge, training, and teaching of dental implants, as well as information about restorations retained for the dental implants, were higher among participants from Saudi dental schools than participants from non-Saudi dental schools, while the information about dental implants was higher among participants from non-Saudi dental schools than participants from Saudi dental schools. Conclusion: We conclude that the actual practical attitude and knowledge of dental implants among participants in the current study was insufficient. Therefore, dental implant education in the undergraduate curricula of dental schools surveyed should be updated to include teaching, laboratory training, and preclinical and clinical training.
基金Supported by Sao Paulo Research Foundation,FAPESP,No.2008/06972-6The National Council for Scientific and Technological Development,CNPq Nos.579157/2008-3,302768/2009-2 and 473282/2007-0+1 种基金Pesq-Doc scholarship to Dr.Shibli from University of GuaruhosScholarship to Dr.Giro from University of Guarulhos
文摘AIM: To assess the failure and bone-to-implant contact rate of dental implants placed on osteoporotic subjects. METHODS: Extensive examination strategies were created to classify studies for this systematic review. MEDLINE(via Pub Med) and EMBASE database were examined for studies in English up to and including May 2014. The examination presented a combination of the MeS H words described as follow: "osteoporosis" or "osteopenia" or "estrogen deficiency" AND "implant" or "dental implant" or "osseointegration". Assessment of clinical and/or histological peri-implant conditions in osteoporosis subjects treated with titanium dental implants. The examination included a combination of the MeS H terms described as follow: "osteoporosis" or "osteopenia" or "estrogen deficiency" AND "implant" or "dental implant" or "osseointegration".RESULTS: Of 943 potentially eligible articles, 12 were included in the study. A total of 133 subjects with osteoporosis, 73 subjects diagnosed with osteopenia and 708 healthy subjects were assessed in this systematic review. In these subjects were installed 367, 205, 2981 dental implants in osteoporotic, osteopenic and healthy subjects, respectively. The failure rate of dental implant was 10.9% in osteoporotic subjects, 8.29% in osteopenic and 11.43% in healthy ones. Bone-to-implant contact obtained from retrieved implants ranged between 49.96% to 47.84%, for osteoporosis and non-osteoporotic subjects. CONCLUSION: Osteoporotic subjects presented higher rates of implant loss, however, there is a lower evidence to strengthen or refute the hypothesis that osteoporosis may have detrimental effects on bone healing. Consequently, final conclusions regarding the effect of osteoporosis in dental implant therapy cannot be made at this time. There are no randomized clinical trial accessible for evaluation and the retrospectivenature of the evaluated studies shall be taken in account when interpreting this study.
文摘AIM: To discuss important characteristics of the useof dental implants in posterior quadrants and the rehabilitation planning. METHODS: An electronic search of English articles was conducted on MEDLINE(PubM ed) from 1990 up to the period of March 2014. The key terms were dental implants and posterior jaws, dental implants/treatment planning and posterior maxilla, and dental implants/treatment planning and posterior mandible. No exclusion criteria were used for the initial search. Clinical trials, randomized and non randomized studies, classical and comparative studies, multicenter studies, in vitro and in vivo studies, case reports, longitudinal studies and reviews of the literature were included in this review. RESULTS: One hundred and fifty-two articles met the inclusion criteria of treatment planning of dental implants in posterior jaw and were read in their entirety. The selected articles were categorized with respect to their context on space for restoration, anatomic considerations(bone quantity and density), radiographic techniques, implant selection(number, position, diameter and surface), tilted and pterygoid implants, short implants, occlusal considerations, and success rates of implants placed in the posterior region. The results derived from the review process were described under several different topic headings to give readers a clear overview of the literature. In general, it was observed that the use of dental implants in posterior region requires a careful treatment plan. It is important that the practitioner has knowledge about the theme to evaluate the treatment parameters. CONCLUSION: The use of implants to restore the posterior arch presents many challenges and requires a detailed treatment planning.
文摘<b><span style="font-family:Verdana;">Introduction:</span></b><span style="font-family:Verdana;"> I Do Biotech’s implants were developed starting in 2014. Since then, they obtained GMP and KFDA licenses for distribution in 2015. The main objective of this paper is to determine the survival rate of I Do Biotech implants five years after the first surgery.</span><span style="font-family:Verdana;"> </span><b><span style="font-family:Verdana;">Material and Methods:</span></b><span style="font-family:Verdana;"> 1000 implants were used on 480 prosthes</span><span style="font-family:Verdana;">e</span><span style="font-family:Verdana;">s across 10 clinics on 320 healthy, non-smoker and non-diabetic patients, chosen at random, of which 160 are male and 160 female, all in the age range of 30 to 50 years old. The failure rate was studied related to the patient’s gender, the length and diameter of the implant, anatomical location, the percentage of peri-implantitis, prosthodontic failures and the patient’s quality of life.</span><span style="font-family:Verdana;"> </span><b><span style="font-family:Verdana;">Discussion:</span></b><span style="font-family:Verdana;"> The results obtained are similar to those of Van Steenberghe D. Dieter-Busenlechner, E. Serrano Catauria and far superior to those of Sáenz Guzmán. Failure rates vary greatly from study to study due to the heterogeneity of the samples in the other research papers. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> The overall implant failure rate at 5 years is 1.7%. The factors affecting significantly the survival rate are: the implant diameter, its length and the anatomic area. Failure ratios increase significantly when the diameter or the length of the implant decrease</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;">, and when they are placed in the posterior maxilla (up to 4.3%).</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">The rate of peri-implantitis is 5.1%. The prosthodontic failure rate is 2.91%. The improvement in quality of life and satisfaction increases with the years.</span>
文摘Objective:This study used published studies to assess the survival rate of dental implants placed in patients with bone dysplasia of the maxillofacial region.Material and methods:An electronic search without a specified date range was performed using the MEDLINE,PubMed,EMBASE,Web of Science,and Cochrane databases.No gender or age restrictions were applied.Results:Eighteen publications were found that met the study’s criteria,reporting data on 18 patients with bone dysplasia including cleidocranial dysplasia(CDD),fibrous dysplasia(FD),florid cemento-osseous dysplasia(FCOD),and odonto-maxillary segmental dysplasia(SOMD),who received a total of 130 implants,an average of 7.2 implants/patient(range 1 to 16).The mean age of the patients was 36.7 years(range 15 to 70 years).For implants placed in bone dysplasia,the survival rates were 100% for patients with CDD(n=8),FD(n=5),SOMD(n=2),FCOD with implants inserted far from the lesions(n=2)and 0% for dental implants inserted within FCOD(n=1).The mean follow-up was 38.2 months(min 6,max 60).Conclusions:Dental implants placed in patients with dysplastic bone lesions show high survival rates,similar to those in the general population for CDD,FD,and SOMD.For FCOD,the failure rate was 100%.
文摘The ectodermal dysplasias are rare diseases with hypodontia, hypotrichosis and hypohidrosis. The subject's life is considerably constrained and this from an early age, with major difficulties for the integration and acceptance of conventional prosthetic occlusal rehabilitation. The use of implants is an integral part of early treatment, in the regions of stable growth, that is to say symphysis. In two childs of 5 and 6 years we have made implant-borne prosthetic rehabilitation in the maxilla and the mandible. Aesthetic and social evaluation were positive. We have restored the normal oro-facial functions for the correct development of skeletal bases. They acted as an external fixator intraoral, stimulating the growth by the function. Our question was: can we leave a child throughout his childhood and adolescence with a not suitable removable prosthesis, under the pretext of growth unfinished?
文摘[Objectives] To explore the flexural strength of 3D printed titanium bone bionic dental implants and provide a scientific basis for the clinical application of 3D printed porous bionic bone dental implants. [Methods] The cone-beam CT( CBCT) image information of 20 premolars extracted by orthodontic requirement was collected,and a new porous bone bionic dental implant was produced using modeling software and 3D printer. The premolars were divided into two groups( A and B). The universal testing machine was used to test the flexural strength of the two groups and the difference in flexural strength between the two groups was compared through statistics. [Results]Twenty 3D printed porous titanium bone bionic implants were accurately produced; the morphology of group A and group B were extremely similar to each other; the average flexural strength of group A was 2 767. 92 N,while the average flexural strength of group B was 778. 77 N,showing that the average flexural strength of group A was significantly higher than that of group B,and the difference was statistically significant( P < 0. 05).[Conclusions]The personalized porous structure root implants produced by 3D printing technology are very similar to the target tooth morphology,and show high accuracy and small error of production. Besides,the flexural strength of 3D printed personalized porous structure root implants can fully meet the requirements of the maximum occlusal force for dental implant restoration. It is expected to provide a scientific basis for clinical application of 3 D printed porous bionic bone tooth implants.
文摘In this work, samples of titanium dental implants in salivary environment in the presence of certain foods were studied. 24 samples were prepared and subjected to the reactivity of certain foods for 6, 5, 6 and 7 weeks. The ICP-MS technique was used to analyze the prepared samples. The results obtained showed no corrosion of the titanium alone in an artificial salivary medium. Significant corrosion was observed in the presence of food, which is manifested by the presence of traces of titanium in the samples.
基金a project titled "Effect of Systematic Health Education on Prevention of Peri-implant Diseases"。
文摘Objective:To analyze and evaluate the clinical efficacy of different treatment options for patients with peri-implant infection.Methods:The study period was from June 2019 to June 2020.Seventy-six patients with peri-implant infection that were treated in Stomatological Hospital of Hefei were selected as study samples.The patients were divided into a research group and a control group by random number table method in which the sample size of each group was n=38.Patients in the control group were treated with drugs combined with ultrasonic cleaning while patients in the research group were treated with guided bone regeneration combined with flap curettage.The indicators of the two groups were compared and analyzed.Results:The plaque index(PLI),probing depth(PD),and sulcus bleeding index(SBI)of the two groups after treatment were lower than those before treatment(P<0.05).There was no significant difference between the groups(P>0.05).However,the height of the implant marginal bone of the study group after treatment was higher than that of the control group(P<0.05)..Conclusion:The use of guided bone regeneration combined with flap curettage for patients with infection around dental implants promotes the fusion of bone and implants.The clinical effect was significant and this should be comprehensively promoted in medical institutions at all levels.
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.12272253,11632013,and 11902214)the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(Grant Nos.2021SX-AT008 and 2021SX-AT009)The support of the Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province(Grant No.20220006)is also acknowledged with gratitude.
文摘Titanium and its alloys are often used as substrates for dental implants due to their excellent mechanical properties and good biocompatibility.However,their ability to bind to neighboring bone is limited due to the lack of biological activity.At the same time,they show poor antibacterial ability which can easily cause bacterial infection and chronic inflammation,eventually resulting in implant failure.The preparation of composite hydroxyapatite coatings with antibacterial ability can effectively figure out these concerns.In this review,the research status and development trends of antibacterial hydroxyapatite coatings constructed on titanium and its alloys are analyzed and reviewed.This review may provide valuable reference for the preparation and application of high-performance and multi-functional dental implant coatings in the future.
文摘BACKGROUND Lateral window approach for sinus floor lift is commonly used for vertical bone augmentation in cases when the residual bone height is less than 5 mm.However,managing cases becomes more challenging when a maxillary sinus pseudocyst is present or when there is insufficient bone width.In this case,we utilized the bone window prepared during the lateral window sinus lift as a shell for horizontal bone augmentation.This allowed for simultaneous horizontal and vertical bone augmentation immediately after the removal of the maxillary sinus pseudocyst.CASE SUMMARY A 28-year-old female presented to our clinic with the chief complaint of missing upper left posterior teeth.Intraoral examination showed a horizontal deficiency of the alveolar ridge contour.The height of the alveolar bone was approximately 3.6 mm on cone beam computed tomography(CBCT).And a typical well-defined'dome-shaped'lesion in maxillary sinus was observed on CBCT imaging.The lateral bony window was prepared using a piezo-ultrasonic device,then the bony window was fixed to the buccal side of the 26 alveolar ridge using a titanium screw with a length of 10 mm and a diameter of 1.5 mm.The space between the bony window and the alveolar ridge was filled with Bio-Oss,covered with a Bio-Gide collagen membrane,and subsequently sutured.Nine months later,the patient’s bone width increased from 4.8 to 10.5 mm,and the bone height increased from 3.6 to 15.6 mm.Subsequently,a Straumann^(■)4.1 mm×10 mm implant was placed.The final all-ceramic crown restoration was completed four months later,and both clinical and radiographic examinations showed that the implant was successful,and the patient was satisfied with the results.CONCLUSION The bone block harvested from the lateral window sinus lift can be used for simultaneous horizontal bone augmentation acting as a shell for good two-dimensional bone augmentation.
文摘Generally being considered as a safe area for surgical approaches, the region between the mental foramina presents important anatomical structures. The objective of this study was to measure the dimensions of the genial plexus and its three-dimensional location in CBCT images, correlating the characteristics of this structure with dental presence, sex and age of patients. A total of 149 cone beam computer tomography (CBCT) scans of dentate (n = 74) and edentulous patients (n = 75) were selected, 59 male and 90 female, aged 18 - 86 years. Measurements of width and length of the genial canal were performed, and the shortest distances of the genial plexus were determined in relation to the alveolar bone crest, the buccal cortical bone and the base of the mandible. The results indicated significant differences between the dentate and edentulous groups for the mandibular canal length (p = 0.030), distance from alveolar crest (p < 0.001), and distance from buccal cortical bone (p < 0.001), with significantly higher values in dentate patients. As for gender, the distances between the genial plexus and the alveolar bone crest (p < 0.001) and the buccal cortical bone (p = 0.028) were significantly shorter for females. Regarding age, only the distance between the genial plexus and the alveolar crest showed a significant difference (p < 0.001), and the smallest values were measured in the older patients. It can be concluded that there are variations of the genial plexus in relation to gender, age and between edentulous and dentate patients. Therefore, the anterior region of the mandible, especially the midline should be observed with caution when undergoing surgical procedures, such as removal of bone grafts and installation of dental implants.
文摘Background: Narrow-diameter implants (3.0 - 3.5 mm range) have been introduced for the replacement of teeth with insufficient bone structure and/or limited mesiodistal or interimplant spaces, and appear to offer clinical results similar to those obtained with implants of greater diameter. Studies using extra-narrow-diameter implants (2.8 mm) are scarce. Case Presentation: A 59-year-old male patient received two extra-narrow-diameter implants, 2.8 × 11 mm in the region between elements 11 and 14. Together, two 3.5 × 8.5 mm SYSTHEX®platform 4.1 implants were installed in the region of elements 15 and 16 to provide greater stability in the occlusion. Of four previous implants on the maxillary left side, one in the region between the elements 23 and 24 that was located in a very apical position and vestibularized was removed. The provisional was already installed on the elements 11, 21, and 22 with the metal cores already prepared and with the Globteck®implants in the region of the elements 23, 24, and 27. The functional and esthetic results were satisfactory. Conclusions: Insertion of extra-narrow-diameter implants of 2.8 mm in the maxillary anterior region is a reliable option in a patient with absence of elements 12 and 13, restoring masticatory function and aesthetics in the upper arch.
基金Natural Science Foundation of Guangdong Province(Grant No.2021A1515011208)National Natural Scientific Foundation of China(Grant No.81671788)+1 种基金National Science Foundation for Young Scientists of China(Grant No.81701662)The Joint Found of National Science Foundation of China and GuangDong Provincial Government(Grant No.U1301258).
文摘At present,dental implant surgery mainly relies on the clinical experience of the doctor and the assistance of preoperative medical imaging.However,there are some problems in dental implant surgery,such as narrow space,sight obstruction,inaccurate positioning,and high requirements of doctors’proficiency.Therefore,a dental implant robot system(DIRS)guided by optical navigation is developed in this study,with an x-shaped tool and an irregular pentagonal tracer are designed for spatial registration and needle tip positioning strategy respectively.The coordinate system of each unit in DIRS is unified through system calibration,spatial registration,and needle tip positioning strategy.Then the surgical path is planned on the computed tomography(CT)images in the navigation software before operation.The automatic positioning method and the auxiliary positioning method can be used in the operation to achieve accurate positioning and assist doctors to complete the operation.The errors of spatial registration,needle tip positioning strategy,and the overall accuracy of the system were evaluated respectively,and the results showed that they all met the needs of clinical surgery.This study preliminarily verified the feasibility of the precise positioning method for dental surgery robots and provided certain ideas for subsequent related research.
文摘Dental implants have spread worldwide in dentistry. The risks and complications reported are limited to local issues. However, in this case, a patient complained of systemic symptoms after dental implantation. This case report aims to demonstrate that systemic symptoms such as lumbago, shoulder stiffness, neck pain, hip joint pain, and facial pain improved after the removal of well-osseointegrated titanium implants. The results suggest that harmful electromagnetic waves received by implants affect body conditions;however, to date, the underlying mechanisms have not been identified. Therefore, further research is required.
基金This work was financially supported by Grant-in-Aid(Nos.19K10250 and 18K09686)from Scientific Research of the Japan Society for the Promotion of Science(JSPS).
文摘The surface treatment is important for titanium and its alloys as promising candidates for dental implantation due to their bioinert surface.Titanium surface samples were modified using H2O2 solution at different times up to 72 h to boost their bioactivity.According to the results of the field emission scanning electron microscopy test,some nanostructures are formed on the surface of treated titanium samples and increased in size by increasing the time of treatment up to 24 h.After 24 h of application,the sharpness of nanostructures decreased and the micro-cracks and discontinuity in the coating surface increased.The results of the X-ray diffraction study and Raman spectroscopy revealed that anatase(TiO2)was formed on the surface of treated titanium samples.The peak intensity of Raman spectroscopy increased with an improvement in treatment time of up to 24 h and then decreased due to the discontinuity of the coating.Full wettability and ability to form apatite were reached at 6 h of treatment.It is clear that the treatment time has a significant effect on the surface treatment of titanium using the H2O2 solution.
基金Major Research&Development Program of Shandong Province(Grant No.2015GGX103043)Taishan Scholars Program of Shandong Province(Grant No.ts201712002).
文摘The insertion torque of a dental implant is an important indicator for the primary stability of dental implants.Thus,the preoperative prediction for the insertion torque is crucial to improve the success rate of implantation surgery.In this present research,an alternative method for prediction of implant torque was proposed.First,the mechanical model for the insertion torque was established based on an oblique cutting process.In the proposed mechanical model,three factors,including bone quality,implant geometry and surgical methods were considered in terms of bone-quality coefficients,chip load and insertion speeds,respectively.Then,the defined bone-quality coefficients for cancellous bone with the computed tomography(CT)value of 235–245,345–355 and 415–425 Hu were obtained by a series of insertion experiments of IS and ITI implants.Finally,the insertion experiments of DIO implants were carried out to verify the accuracy of developed model.The predicted insertion torques calculated by the mechanical model were compared with those acquired by insertion experiments,with good agreement,the relative error being less than 15%.This method allows the insertion torque for different implant types to be quickly established and enhances prediction accuracy by considering the effects of implants’geometries and surgical methods.
文摘Following the worldwide trend of developing heavy metal free materials, dental implants aren’t out of this tendency. Over the years, a number of techniques to condition the surface of dental implants have been designed and used such as oxide blasting, however the scientific medical community has been concerned about the use of these heavy metals which leads us to investigate and develop new conditioning techniques. The aim of the study was the analysis of the Systhex<span style="font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;"><span style="font-family:Verdana, Helvetica, Arial;white-space:normal;background-color:#FFFFFF;"><sup>®</sup></span></span> implant surface in automatic system for the treatment of the surface with acid, where we can identify the surfaces purity level, pore size, deepness and especially the roughness proportionated by the technology of acid conditioning on the titanium surfaces of degree IV dental implants. We conclude that the automatic conditioning of acid attack promoted cleanliness, homogeneity and ideal roughness for the osseointegration process.
文摘This study aimed to assess the systemic effect of LLLT on thyroid gland functioning and consequently on calcium regulation through Triiodothyronine (T3) and Thyroxine (T4) measurements in rabbits’ serum. A total of thirty two New Zealand male rabbits were randomly distributed in four groups with eight animals each: control group C (nonirradiated animals), group EI (5 J/cm2 per session), group EII (10 J/cm2 per session) and group EIII (20 J/cm2 per session). All animals underwent lower left incisor extraction followed by immediate insertion of an osseintegrated implant, providing an equality of initial clinical condition between the groups. The experimental groups were irradiated with aluminium gallium arsenide diode laser (GaAlAs, λ = 830 nm, 50 mW, CW), during 13 days at each 48 hours, totalizing 7 sessions. Laboratorial T3 and T4 measurements were done in four distinct moments (before surgical procedure, immediately after surgical procedure, after the first LLLT session and after the last LLLT session) in all animals. The results obtained showed statistically significant differences in Triiodothyronine values between the groups throughout the experiment. It was concluded that the LLLT, in the protocol of irradiation used in this study, promoted a significantly alteration on rabbits’ serum hormonal levels.
文摘Purpose: This study investigated the attitude of patients, grouped by the Brinkman index, towards smoking by using the Kano Test for Social Nicotine Dependence (KTSND) and their knowledge of peri-implantitis. Methods: The participants were 3093 new patients who visited the Tokyo Medical and Dental University Hospital from January 2012 to December 2013 for an oral implant. The methodology included a questionnaire about sex, age, smoking status, daily average number of cigarettes, years of smoking, knowledge of peri-implantitis, and the KTSND. The patients were grouped according to their smoking status by calculating their Brinkman index (over 200 or not): current smokers with the possibility of nicotine dependence (BI(+)CS), current smokers with no possibility of nicotine dependence (BI(-)CS), ex-smokers (ES), and non-smokers (NS). The Brinkman index is obtained by multiplying one’s daily average number of cigarettes by the number of years they have been smoking. Results: Data were collected from 2182 respondents (response rate = 71%). The KTSND scores of BI(+)CS (16.89 ± 4.26) were significantly higher than the scores of ES (11.99 ± 4.52) and NS (11.53 ± 5.01). In current smokers, there were no significant differences between BI(+)CS and BI(-)CS. The patients replied “I don’t know” about peri-implantitis most often in all groups;however, there were no significant differences between the groups. Discussion: BI(+)CS were more dependent on nicotine in social situations than the other groups were. In Japan, a Brinkman index over 200 is required for a nicotine-dependence management fee to be instituted for health insurance treatment. This is a major concern for young smokers, who may be excluded from treatment because their years of smoking are substantially less. Results revealed that there were no significant differences between BI(+)CS and BI(-)CS. Therefore, it was suggested that the Brinkman index did not sufficiently group the participants.
