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Cetylpyridinium chloride mouth rinses alleviate experimental gingivitis by inhibiting dental plaque maturation 被引量:7
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作者 Fei Teng Tao He +8 位作者 Shi Huang Cun-Pei Bo Zhen Li Jin-Lan Chang Ji-Quan Liu Duane Charbonneau Jian Xu Rui Li Jun-Qi Ling 《International Journal of Oral Science》 SCIE CAS CSCD 2016年第3期182-190,共9页
Oral rinses containing chemotherapeutic agents, such as cetylpyridinium chloride (CPC), can alleviate plaque-induced gingival infections, but how oral microbiota respond to these treatments in human population remai... Oral rinses containing chemotherapeutic agents, such as cetylpyridinium chloride (CPC), can alleviate plaque-induced gingival infections, but how oral microbiota respond to these treatments in human population remains poorly understood. Via a double- blinded, randomised controlled trial of 91 subjects, the impact of CPC-containing oral rinses on supragingival plaque was investigated in experimental gingivitis, where the subjects, after a 21-day period of dental prophylaxis to achieve healthy gingivae, received either CPC rinses or water for 21 days. Within-subject temporal dynamics of plaque microbiota and symptoms of gingivitis were profiled via 16S ribosomal DNA gene pyrosequencing and assessment with the Mazza gingival index. Cetylpyridinium chloride conferred gingival benefits, as progression of gingival inflammation resulting from a lack of dental hygiene was significantly slower in the mouth rinse group than in the water group due to inhibition of 17 gingivitis-enriched bacterial genera. Tracking of plaque a and β diversity revealed that CPC treatment prevents acquisition of new taxa that would otherwise accumulate but maintains the original biodiversity of healthy plaques. Furthermore, CPC rinses reduced the size, local connectivity and microbiota-wide connectivity of the bacterial correlation network, particularly for nodes representing gingivitis- enriched taxa. The findings of this study provide mechanistic insights into the impact of oral rinses on the progression and maturation of dental plaque in the natural human population. 展开更多
关键词 cetylpyridinium chloride oral microbiota oral rinse
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Effect of anti-biofilm glass–ionomer cement on Streptococcus mutans biofilms 被引量:7
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作者 Su-Ping Wang Yang Ge +8 位作者 Xue-Dong Zhou Hockin HK Xu Michael D Weir Ke-Ke Zhang Hao-Hao Wang Matthias Hannig Stefan Rupf Qian Li Lei Cheng 《International Journal of Oral Science》 SCIE CAS CSCD 2016年第2期76-83,共8页
Dental restorative materials with antimicrobial properties can inhibit bacterial colonization, which may result in a reduction of caries at tooth-filling interaction zones. This study aimed to develop antibacterial gl... Dental restorative materials with antimicrobial properties can inhibit bacterial colonization, which may result in a reduction of caries at tooth-filling interaction zones. This study aimed to develop antibacterial glass-ionomer cements (GIC) containing a quaternary ammonium monomer (dimethylaminododecyl methacrylate, DMADDM), and to investigate their effect on material performance and antibacterial properties. Different mass fractions (0, 1.1% and 2.2%) of DMADDM were incorporated into the GIC. The flexure strength, surface charge density, surface roughness and fluoride release were tested. A Streptococcus mutans biofilm model was used. Exopolysaccharides (EPS) staining was used to analyze the inhibitory effect of DMADDM on the biofilm matrix. In addition, biofilm metabolic activity, lactic acid metabolism and the expression of glucosyltransferase genes g/fB, gtfC and gtfD were measured. GIC containing 1.1% and 2.2% DMADDM had flexural strengths matching those of the commercial control (P〉0.1). DMADDM was able to increase the surface charge density but reduced surface roughness (P〈0.05). The incorporation of 1.1% and 2.2% DMADDM elevated the release of fluoride by the GIC in the first 2 days (P〈0.05). The novel DMADDM-modified GIC significantly reduced biofilm metabolic activity (P〈 0.05) and decreased lactic acid production (P〈 0.05). The quantitative polymerase chain reaction (qPCR) results showed that the expression of gtfB, g/fC and gtfD decreased when mass fractions of DMADDM increased (P〈0.05). EPS staining showed that both the bacteria and EPS in biofilm decreased in the DMADDM groups. The incorporation of DMADDM could modify the properties of GIC to influence the development of S. mutans biofilms. In this study, we investigated the interface properties of antibacterial materials for the first time. GIC containing DMADDM can improve material performance and antibacterial properties and may contribute to the better management of secondary caries. 展开更多
关键词 antibacterial properties dimethylaminododecyl methacrylate glass-ionomer cement material performance Streptococcusmutans biofilms
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Metabolite profile comparisons between ascending and descending colon tissue in healthy adults 被引量:2
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作者 Bridget A Baxter Kristopher D Parker +4 位作者 Michael J Nosler Sangeeta Rao Rebecca Craig Catherine Seiler Elizabeth P Ryan 《World Journal of Gastroenterology》 SCIE CAS 2020年第3期335-352,共18页
BACKGROUND Obesity is a risk factor for colorectal cancer,yet metabolic distinctions between healthy right and left colon tissue,before cancer is diagnosed,remains largely unknown.This study compared right-ascending a... BACKGROUND Obesity is a risk factor for colorectal cancer,yet metabolic distinctions between healthy right and left colon tissue,before cancer is diagnosed,remains largely unknown.This study compared right-ascending and left-descending colon tissue metabolomes to identify differences from the stool metabolome in normal weight,overweight,and obese adults.AIM To examine right and left colon tissue metabolites according to body mass index that may serve as mechanistic targets for interventions and biomarkers for colon cancer risk.METHODS Global,non-targeted metabolomics was applied to assess right-ascending and left-descending colon tissue collected from healthy adults undergoing screening colonoscopies to test the hypothesis that BMI differentially impacts colon tissue metabolite profiles.The colon tissue and stool metabolome of healthy adults(n=24)was analyzed for metabolite signatures and metabolic pathway networks implicated in progression of colorectal cancer.RESULTS Ascending and descending colon contained 504 host,food,and microbiotaderived metabolites from normal weight,overweight and obese adults grouped according to body mass index.Amino acids,lipids,and nucleotides were among the chemical types that further differentiated from the stool metabolite profiles.Normal weight adults had 46 significantly different metabolites between ascending and descending colon tissue locations,whereas there were 37 metabolite differences in overweight and 28 metabolite differences for obese adults(P<0.05).Obese adults had trimethylamine N-oxide,endocannabinoids and monoacylglycerols with different relative abundances identified between ascending and descending colon.Primary and secondary bile acids,vitamins,and fatty acids also showed marked relative abundance differences in colon tissue from overweight/obese adults.CONCLUSION There were metabolite profile differences between right-ascending and leftdescending colon tissue in healthy adults.Colon lipids and other metabolites in obese and overweight adults were distinguished from normal weight participants and associated with gut inflammation,nutrient absorption,and products of microbiota metabolism. 展开更多
关键词 COLON Ascending DESCENDING Metabolomics OBESITY STOOL
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Endoplasmic reticulum stress-mediated pathways to both apoptosis and autophagy: Significance for melanoma treatment 被引量:16
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作者 Mohamed Hassan Denis Selimovic +3 位作者 Matthias Hannig Youssef Haikel Robert T Brodell Mossaad Megahed 《World Journal of Experimental Medicine》 2015年第4期206-217,共12页
Melanoma is the most aggressive form of skin cancer.Disrupted intracellular signaling pathways are responsible for melanoma's extraordinary resistance to current chemotherapeutic modalities. The pathophysiologic b... Melanoma is the most aggressive form of skin cancer.Disrupted intracellular signaling pathways are responsible for melanoma's extraordinary resistance to current chemotherapeutic modalities. The pathophysiologic basis for resistance to both chemo- and radiation therapy is rooted in altered genetic and epigenetic mechanisms that, in turn, result in the impairing of cell death machinery and/or excessive activation of cell growth and survival-dependent pathways. Although most current melanoma therapies target mitochondrial dysregulation,there is increasing evidence that endoplasmic reticulum(ER) stress-associated pathways play a role in the potentiation,initiation and maintenance of cell death machinery and autophagy. This review focuses on the reliability of ER-associated pathways as therapeutic targets for melanoma treatment. 展开更多
关键词 MELANOMA Endoplasmic reticulum APOPTOSIS AUTOPHAGY Signaling PATHWAYS CHEMOTHERAPY
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Vascular targeted photochemotherapy using padoporfin and padeliporfin as a method of the focal treatment of localised prostate cancer-clinician's insight 被引量:3
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作者 Andrzej M Bugaj 《World Journal of Methodology》 2016年第1期65-76,共12页
Vascular targeted photochemotherapy(VTP) holds promise as a novel strategy of the focal treatment of localised prostate cancer(LPCa). It is convenient to perform, minimally invasive and can be conduct in ambulatory co... Vascular targeted photochemotherapy(VTP) holds promise as a novel strategy of the focal treatment of localised prostate cancer(LPCa). It is convenient to perform, minimally invasive and can be conduct in ambulatory conditions. In this review, methodologic aspects of padoporfin- and padeliporfin-mediated VTP and its clinical application in focal treatment of LPCa as well as future perspective of this method were presented. Physicochemical and pharmacokinetic parameters of padoporphin and padeliporfin using as VTP photosensitizers were described, as well as methodologic question of radiation delivery and dosimetry, and oxygen monitoring in cancer tissue in context of VTP safety and efficiency of LPCa focal therapy were discussed. The results of clinical trials concerning application of padoporfin- and padeliporfin-mediated VTP in LPCa were also presented. The future of VTP is development of protocols, founded on the realtime feedback and rules-based approach to make this strategy a standard procedure in LPCa treatment. To evaluate clinical potential of this procedure, a costeffectiveness analysis is also necessary. 展开更多
关键词 Localised PROSTATE cancer FOCAL therapy Vascular-targeted PHOTOCHEMOTHERAPY Methodology Clinical trials
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Eight-week ledipasvir/sofosbuvir in non-cirrhotic, treatment-na?ve hepatitis C genotype-1 patients with hepatitis C virus-RNA < 6 million: Single center, real world effectiveness and safety 被引量:1
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作者 Nyan L Latt Beshoy T Yanny +2 位作者 Derenik Gharibian Rita Gevorkyan Amandeep K Sahota 《World Journal of Gastroenterology》 SCIE CAS 2017年第26期4759-4766,共8页
AIM To evaluate sustained viral response(SVR) of 8-wk ledipasvir/sofosbuvir therapy among non-cirrhotic, genotype-1 hepatitis C virus(HCV) patients with RNA < 6 million IU/m L.METHODS We performed a retrospective c... AIM To evaluate sustained viral response(SVR) of 8-wk ledipasvir/sofosbuvir therapy among non-cirrhotic, genotype-1 hepatitis C virus(HCV) patients with RNA < 6 million IU/m L.METHODS We performed a retrospective cohort study to examine SVR rates, predictors of treatment failure and safety analysis of 8-wk ledipasvir/sofosbuvir(LDV/SOF) therapy among non-cirrhotic, genotype 1 HCV patients with viral load < 6 million IU/m L. Primary outcome was an achievement of SVR at 12 wk after treatment. Secondary outcomes were identifying predictors of treatment failure and adverse events during treatment.RESULTS Total 736 patients: 55% males, 51% Caucasians and 65% were genotype 1a. Non-cirrhotic state of 53% was determined by clinical judgment(imaging, AST, platelet count) and 47% had documented liver fibrosis testing(biopsy, vibration-controlled transient elastography, serum biomarkers). Overall SVR12 was 96%. No difference in SVR12 was seen between patients whose non-cirrhotic state was determined by clinical judgment and patients who had fibrosis testing. Age groups, gender, ethnicity and genotype 1 subtype did not predict SVR. Non-cirrhotic state determined by clinical judgment based on simple, non-invasive tests were not associated with lower SVR [OR = 1.02, 95%CI: 0.48-2.17, P = 0.962]. The AUROC for hepatitis C RNA viral load was 0.734(P < 0.001, 95%CI: 0.66-0.82). HCV RNA 2.2 million IU/m L was identified as the cutoff value with sensitivity 73% and specificity 64%. HCV RNA < 2.2 million IU/m L was associated with significantly higher SVR 98% with OR = 0.22(95%CI: 0.1-0.49, P < 0.001) compared to SVR 92% in HCV RNA ≥ 2.2 million IU/m L. No death or morbidities were reported.CONCLUSION Our outcomes validate safety and effectiveness of 8-wk LDV/SOF therapy in non-cirrhotic, untreated HCV genotype 1 patients with HCV RNA < 6 million IU/m L. 展开更多
关键词 Hepatitis C Sustained viral response Ledipasvir CIRRHOSIS Sofosbuvir
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Hepatitis C virus-associated pruritus: Etiopathogenesis and therapeutic strategies 被引量:2
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作者 Youssef Alhmada Denis Selimovic +5 位作者 Fadi Murad Sarah-Lilly Hassan Youssef Haikel Mossaad Megahed Matthias Hannig Mohamed Hassan 《World Journal of Gastroenterology》 SCIE CAS 2017年第5期743-750,共8页
In addition to its contributing role in the development of chronic liver diseases, chronic hepatitis C virus (HCV) infection is associated with extrahepatic manifestations, particularly, cutaneous-based disorders incl... In addition to its contributing role in the development of chronic liver diseases, chronic hepatitis C virus (HCV) infection is associated with extrahepatic manifestations, particularly, cutaneous-based disorders including those with pruritus as a symptom. Pruritus is frequently associated with the development of chronic liver diseases such as cholestasis and chronic viral infection, and the accumulation of bile acids in patients&#x02019; sera and tissues as a consequence of liver damage is considered the main cause of pruritus. In addition to their role in dietary lipid absorption, bile acids can trigger the activation of specific receptors, such as the G protein-coupled bile acid receptor (GPBA/ TGR5). These types of receptors are known to play a crucial role in the modulation of the systemic actions of bile acids. TGR5 expression in primary sensory neurons triggers the activation of the transient receptor potential vanilloid 1 (TRPV1) leading to the induction of pruritus by an unknown mechanism. Although the pathologic phenomenon of pruritus is common, there is no uniformly effective therapy available. Understanding the mechanisms regulating the occurrence of pruritus together with the conduction of large-scale clinical and evidence-based studies, may help to create a standard treatment protocol. This review focuses on the etiopathogenesis and treatment strategies of pruritus associated with chronic HCV infection. 展开更多
关键词 Hepatitis C virus PRURITUS CHOLESTASIS Autotoxin Lysophosphatidic acid PI3 kinase
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History and present status of pulmonary metastasectomy in colorectal cancer
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作者 Tom Treasure Miel Miloevi +1 位作者 Francesca Fiorentino Joachim Pfannschmidt 《World Journal of Gastroenterology》 SCIE CAS 2014年第40期14517-14526,共10页
Clinical practice with respect to metastatic colorectal cancer differs from the other two most common cancers,breast and lung,in that routine surveillance is recommended with the specific intent of detecting liver and... Clinical practice with respect to metastatic colorectal cancer differs from the other two most common cancers,breast and lung,in that routine surveillance is recommended with the specific intent of detecting liver and lung metastases and undertaking liver and lung resections for their removal.We trace the history of this approach to colorectal cancer by reviewing evidence for effectiveness from the 1950s to the present day.Our sources included published citation network analyses,the documented proposal for randomised trials,large systematic reviews,and meta-analysis of observational studies.The present consensus position has been adopted on the basis of a large number of observational studies but the randomised trials proposed in the 1980s and 1990s were either not done,or having been done,were not reported.Clinical opinion is the mainstay of current practice but in the absence of randomised trials there remains a possibility of selection bias.Randomised controlled trials(RCTs)are now routine before adoption of a new practice but RCTs are harder to run in evaluation of already established practice.One such trial is recruiting and shows that controlled trial are possible. 展开更多
关键词 Colorectal cancer METASTASECTOMY Liver resection Pulmonary metastasectomy Oligometastatic state
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Participation in Mind-Body-Spirit Programs and Length of Stay in a Residential Addiction Treatment Facility: A Retrospective Analysis
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作者 Robert Gundel Marie Lanier +2 位作者 Sarah Osborne Randall Dwenger Sahel Shwayhat 《Open Journal of Medical Psychology》 2017年第2期103-114,共12页
Length of stay in treatment is thought to be the best predictors for long-term recovery from substance use disorders. The objective of this study was to examine the relationship between participation in mind-body-spir... Length of stay in treatment is thought to be the best predictors for long-term recovery from substance use disorders. The objective of this study was to examine the relationship between participation in mind-body-spirit (MBS) therapeutic programs and length of stay in a residential treatment facility. A retrospective analysis of data from 1719 subjects who were admitted to a 30-day residential program for substance use disorders (SUD) was conducted. Subjects participated in MBS programs that included yoga, acupuncture and meditation. We examined the effects of subject participation in MBS programs for subjects who left against staff advice (ASA) and those who successfully completed the residential program. A higher percentage of subjects with severe heroin use disorder left ASA compared with subjects with severe alcohol use disorder (16% vs. 9%, respectively). Most subjects from both substance groups who failed to complete the 30-day treatment program, left within the first two weeks of stay (59% of alcohol group and 75% of heroin group);however, again, the percentage of heroin users leaving during the first two weeks was significantly greater compared with that of alcohol subjects. We found a highly significant, positive correlation (r = 0.56, p < 0.01) and a statistically significant increase in LOS for all subjects, regardless of the substance type, and the number of MBS program sessions attended showing an association between MBS participation and increased LOS. These data support the inclusion of MBS programs as part of a comprehensive treatment strategy for SUD in combination with traditional counseling to help develop a sustainable long-term recovery. 展开更多
关键词 Substance Use Disorder Length of Stay RESIDENTIAL Treatment FACILITY Mind-Body-Spirit PROGRAMS
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Incongruence between the Preferred Mode of Delivery and Risk of Childbirth Complications among Antepartum Women in Mulago Hospital, Uganda
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作者 Dan Kabonge Kaye Annettee Nakimuli +3 位作者 Othman Kakaire Michael Odongo Osinde Nelson Kakande Scovia Nalugo Mbalinda 《Open Journal of Obstetrics and Gynecology》 2014年第14期889-898,共10页
Objective: Women’s preferences for the mode of delivery provide clues on their knowledge and perceptions of anticipated risk of childbirth complications.?The objective was toinvestigate?incongruence between preferred... Objective: Women’s preferences for the mode of delivery provide clues on their knowledge and perceptions of anticipated risk of childbirth complications.?The objective was toinvestigate?incongruence between preferred mode of delivery and risk of adverse pregnancy outcomes. Methods: Through a cross-sectional study, data were?collected from 327?women admitted to Mulago hospital. Data included socio-demographic?characteristics, past medical, gynaecological and obstetric history, pregnancy complications, knowledge of pregnancy complications and preferred mode of delivery. The preferred mode of delivery and knowledge of related risks for adverse pregnancy outcomes were compared. Results: The mean age of participants was 24.7 years (±5.9), ranging?14?-?43 years, of whom 41.4% were nulliparous. The preferred mode of delivery was vaginal (84.1%). Incongruence?(preference for a mode of delivery that did not correspond to expected or anticipated risks) occurred in 88 (26.9%) of the women, and was associated with having secondary school or higher level of education (OR 2.49, CI 1.52?-?4.08) and history of previous vaginal delivery (OR 3.82,?CI 1.94?-?7.49). Conclusion: One in four women had incongruence between preferred mode of delivery and risks of adverse pregnancy outcomes, which called?for urgent interventions to improve decision-making about intrapartum care. 展开更多
关键词 Quality of CARE INTRAPARTUM CARE PREFERENCE for Mode of Delivery Decision-Making
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手术切除结直肠癌复发转移灶:我们的选择是否正确?
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作者 Tom Treasure Kathryn Monson +5 位作者 Francesca Fiorentino Christopher Russell 王林 顾晋 刘思旸 吴一龙 《英国医学杂志中文版》 2014年第6期352-356,共5页
一项20年前未发表的随机对照试验结果质疑了结直肠癌根治性手术后再次手术治疗的生存获益。Tom Treasure和他的团队在恢复隐形与被废弃试验的倡议下重塑了第一项试验,并讨论了该试验结果在今天的意义。
关键词 结直肠癌 权利 复发
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Systematic Cross-biospecimen Evaluation of DNA Extraction Kits for Long-and Short-read Multi-metagenomic Sequencing Studies 被引量:1
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作者 Jacqueline Rehner Georges Pierre Schmartz +16 位作者 Laura Groeger Jan Dastbaz Nicole Ludwig Matthias Hannig Stefan Rupf Berthold Seitz Elias Flockerzi Tim Berger Matthias Christian Reichert Marcin Krawczyk Eckart Meese Christian Herr Robert Bals Soren L.Becker Andreas Keller Rolf Muller The IMAGINE Consortium 《Genomics, Proteomics & Bioinformatics》 SCIE CAS CSCD 2022年第2期405-417,共13页
High-quality DNA extraction is a crucial step in metagenomic studies.Bias by different isolation kits impairs the comparison across datasets.A trending topic is,however,the analysis of multiple metagenomes from the sa... High-quality DNA extraction is a crucial step in metagenomic studies.Bias by different isolation kits impairs the comparison across datasets.A trending topic is,however,the analysis of multiple metagenomes from the same patients to draw a holistic picture of microbiota associated with diseases.We thus collected bile,stool,saliva,plaque,sputum,and conjunctival swab samples and performed DNA extraction with three commercial kits.For each combination of the specimen type and DNA extraction kit,20-gigabase(Gb)metagenomic data were generated using short-read sequencing.While profiles of the specimen types showed close proximity to each other,we observed notable differences in the alpha diversity and composition of the microbiota depending on the DNA extraction kits.No kit outperformed all selected kits on every specimen.We reached consistently good results using the Qiagen QiAamp DNA Microbiome Kit.Depending on the specimen,our data indicate that over 10 Gb of sequencing data are required to achieve sufficient resolution,but DNA-based identification is superior to identification by mass spectrometry.Finally,longread nanopore sequencing confirmed the results(correlation coefficient>0.98).Our results thus suggest using a strategy with only one kit for studies aiming for a direct comparison of multiple microbiotas from the same patients. 展开更多
关键词 Whole-genome analysis Comparative genomics Short-read sequencing Long-read sequencing DNA extraction Metagenomics
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戒烟:戒烟永不嫌晚,即使他们患有肺癌
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作者 Tom Treasure Janet Treasure 江琪琪(译) 《英国医学杂志中文版》 2010年第4期202-203,共2页
我们是否需要吸烟有害的更多证据?对于心脏疾病、卒中、周围血管疾病和慢性阻塞性肺疾病等常见疾病,吸烟是一个重要因素。此外,大多数肺癌均由吸烟引起,吸烟也是乳腺癌和肠道癌症的危险因素。去年曾有博客称禁烟令是狭隘的和“合理... 我们是否需要吸烟有害的更多证据?对于心脏疾病、卒中、周围血管疾病和慢性阻塞性肺疾病等常见疾病,吸烟是一个重要因素。此外,大多数肺癌均由吸烟引起,吸烟也是乳腺癌和肠道癌症的危险因素。去年曾有博客称禁烟令是狭隘的和“合理的废话科学”,得到的支持甚微。吸烟损耗生命和身体;吸烟甚至导致过早衰老。 展开更多
关键词 肺癌 慢性阻塞性肺疾病 戒烟 周围血管疾病 心脏疾病 常见疾病 危险因素 肠道癌症
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胸腔镜与开胸肺叶切除的长期生存比较:基于SEER数据库的倾向匹配比较分析
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作者 Subroto Paul associate professor Abby J Isaacs senior analyst +3 位作者 Tom Treasure professor Nasser K Altorki professor Art Sedrakyan associate professor and director 周礼馨 《英国医学杂志中文版》 2015年第5期243-243,共1页
目的比较微创肺叶切除和开胸肺叶切除术后的远期生存。方法倾向匹配比较分析。背景监测、流行病学及最终结果(SEER)数据库。参与者2007至2009年所有接受肺叶切除的肺癌患者。主要结局测量微创胸腔镜手术对总生存率、无病生存率和肿瘤... 目的比较微创肺叶切除和开胸肺叶切除术后的远期生存。方法倾向匹配比较分析。背景监测、流行病学及最终结果(SEER)数据库。参与者2007至2009年所有接受肺叶切除的肺癌患者。主要结局测量微创胸腔镜手术对总生存率、无病生存率和肿瘤特异生存率的影响。结果从2007至2009年,共6008例患者接受了肺叶切除,其中开胸手术4715例(78%)。总体中位年龄74(四分位数间距70~78)岁,中位随访时间为40个月。通过匹配分析,两组均纳入1195例患者,结果提示两组患者的3年总生存率、无病生存率和肿瘤相关生存率均没有统计学差异(总生存率:70.6%比68.1%,P=0.55;无病生存率:86.2%比85.4%,P=0.46;肿瘤相关生存率:92.0%比89.5%,P=0.05)。结论本研究通过倾向匹配分析提示胸腔镜肺叶切除术与开胸肺叶切除术在总生存、无病生存和肿瘤特异生存方面没有显著差异。胸腔镜肺叶切除术后的结局不劣于开胸手术。 展开更多
关键词 SEER 匹配使用 数据库 医保 腔镜
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Human dental enamel: A masterpiece investigated natural nanotechnology by TEM and t-EBSD
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作者 Anjela Koblischka-Veneva Michael R. Koblischka +1 位作者 Jorg Schmauch Matthias Hannig 《Nano Research》 SCIE EI CAS CSCD 2018年第7期3911-3921,共11页
The micro- and nanostructures of human dental enamel were investigated by transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). For this purpose, TEM slices were prepared from teeth b... The micro- and nanostructures of human dental enamel were investigated by transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD). For this purpose, TEM slices were prepared from teeth by focused ion-beam milling. These slices enabled TEM and transmission-EBSD (t-EBSD) investigations to be performed, while standard EBSD on bulk tooth samples resulted only in Kikuchi patterns. On the TEM slices, t-EBSD enabled automated mapping. The TEM images and the EBSD data dearly elucidated the arrangement of the hydroxyapatite crystals on the nanometer scale. Information regarding the crystallographic orientation of the apatite grains enabled the deduction of novel nanotechnological building principles of the enamel structure based on a chain-like arrangement of the crystallites. 展开更多
关键词 ENAMEL microstructure transmission electron microscopy (TEM) electron backscatter diffraction (EBSD) transmission-EBSD(t-EBSD)
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Surgical treatment of complicated traumatic aneurysm and arteriovenous fistula
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作者 乔正荣 时德 《Chinese Journal of Traumatology》 CAS 2003年第4期213-217,共5页
Objective: To evaluate the surgical methods and the outcome of management for traumatic arterial aneurysm (TAA) and traumatic arterioveneus fistula (TAVF).Methods: A total of 121 patients with TAA or TAVF were treated... Objective: To evaluate the surgical methods and the outcome of management for traumatic arterial aneurysm (TAA) and traumatic arterioveneus fistula (TAVF).Methods: A total of 121 patients with TAA or TAVF were treated by surgery. Clinical, operative and postoperative data were collected and analyzed retrospectively.Results: The surgical techniques includedaneurysmectomy and arterial end-to-end anastomosis or vascular grafting or artery ligation, aneurysm ligation and bypass, vascular repair, fistula excision and vascular ligation or vascular grafting or repair and so on. One patient died (0.83%). The follow-up rates of TAA and TAVF were 65.7% and 60% respectively.Conclusions: Complicated TAA and TAVF in different sites should be treated with different methods. 展开更多
关键词 Wounds and injuries ANEURYSM Arteriovenous fistula SURGERY TREATMENT
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