Objective To explore the efficacy of minimally invasive percutaneous plate osteosynthesis (MIPPO) technique and locking compression plate (LCP) for open tibial shaft fractures.Methods From March 2005 to May 2009,16 ca...Objective To explore the efficacy of minimally invasive percutaneous plate osteosynthesis (MIPPO) technique and locking compression plate (LCP) for open tibial shaft fractures.Methods From March 2005 to May 2009,16 cases with open tibial展开更多
Objective To explore the effects of the anterior internal fixation systems on the post-operative lateral angulation in treatment of thoracolumbar fractures.Methods A retrospective study was done to analyze the 172 pat...Objective To explore the effects of the anterior internal fixation systems on the post-operative lateral angulation in treatment of thoracolumbar fractures.Methods A retrospective study was done to analyze the 172 patients who had展开更多
The fixation stability achieved with the use of plates and screws in oral and maxillofacial surgery is a decisive factor in treatment success. The mechanical and structural properties of the internal fixation material...The fixation stability achieved with the use of plates and screws in oral and maxillofacial surgery is a decisive factor in treatment success. The mechanical and structural properties of the internal fixation materials have direct influence on the dimensional stability and resistance of a fixation system, thus influencing treatment outcomes. This study proposed to analyze the dimensional and resistance patterns of titanium plates used for obtaining stable fix<span style="font-family:Verdana;">ation in orthognathic surgery and craniofacial trauma. For this study, 30 conventional 2.0</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">mm straight four hole plates with bridge from three brands commercialized in Brazil, were subjected to macroscopic, microscopic, strength and hardness analysis. The dimensional measurements were performed using a digital caliper. Energy-dispersive X-ray spectroscopy analysis was performed by scanning electron microscopy to analyze the chemical composition of the samples. The mechanical resistance tests were performed with a universal testing machine. The samples were then submitted to Vickers hardness analysis, complying with the standards of ASTM E92. The data collected from the dimensional study was submitted to statistical analysis of the coefficient of variation, while the values obtained during the mechanical tests were analyzed by variance (ANOVA) and Tukey’s test (p <</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">0.05). The sample groups presented different performances in resistance, hardness, size and surface, even though they were reported to be chemically similar compounds that allowed us to conclude the plates from Group 2 were more resistant than groups 1 and 3.</span>展开更多
Objective: To provide anatomical basis for the internal fixation of scaphoid fractures.Methods: The shape and vascular lake of 48 dry scaphoids and 36 wet scaphoids were observed.Results: The data of dry bone group an...Objective: To provide anatomical basis for the internal fixation of scaphoid fractures.Methods: The shape and vascular lake of 48 dry scaphoids and 36 wet scaphoids were observed.Results: The data of dry bone group and wet bone group were as follows: the height of scaphoid tubercle were (11.28±0.94) mm and (10.35±1.54) mm; the thickness of scapoid waist were (12.02±1.90) mm and (11.21±1.20) mm; the width of scapoid waist were (10.59±1.11) mm and (11.34±1.47) mm; the minimal thickness of the body of scapoid were (6.51±1.22) mm and (8.54±1.07) mm; the axis length of scapoid were (25.68±2.21) mm and (26.50±2.56) mm; the width of epicondyle of scaphoid of distal portion, waist and proximal portion were (6.50±1.06) mm, (5.14±1.01) nun, (4.42±1.16)mm and(6.64±1.18) mm, (6.01±0.75)mm and(5.71±0.78) mm, respestively. The main blood vessels came from the dorsal and the radial of wrist and passed through the whole scaphoid along the crest of scaphoid.Conclusion: The internal fixation of scaphoid can be designed according to the anatomical data without damag-ing the articular surface and blood supply.展开更多
文摘Objective To explore the efficacy of minimally invasive percutaneous plate osteosynthesis (MIPPO) technique and locking compression plate (LCP) for open tibial shaft fractures.Methods From March 2005 to May 2009,16 cases with open tibial
文摘Objective To explore the effects of the anterior internal fixation systems on the post-operative lateral angulation in treatment of thoracolumbar fractures.Methods A retrospective study was done to analyze the 172 patients who had
文摘The fixation stability achieved with the use of plates and screws in oral and maxillofacial surgery is a decisive factor in treatment success. The mechanical and structural properties of the internal fixation materials have direct influence on the dimensional stability and resistance of a fixation system, thus influencing treatment outcomes. This study proposed to analyze the dimensional and resistance patterns of titanium plates used for obtaining stable fix<span style="font-family:Verdana;">ation in orthognathic surgery and craniofacial trauma. For this study, 30 conventional 2.0</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">mm straight four hole plates with bridge from three brands commercialized in Brazil, were subjected to macroscopic, microscopic, strength and hardness analysis. The dimensional measurements were performed using a digital caliper. Energy-dispersive X-ray spectroscopy analysis was performed by scanning electron microscopy to analyze the chemical composition of the samples. The mechanical resistance tests were performed with a universal testing machine. The samples were then submitted to Vickers hardness analysis, complying with the standards of ASTM E92. The data collected from the dimensional study was submitted to statistical analysis of the coefficient of variation, while the values obtained during the mechanical tests were analyzed by variance (ANOVA) and Tukey’s test (p <</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">0.05). The sample groups presented different performances in resistance, hardness, size and surface, even though they were reported to be chemically similar compounds that allowed us to conclude the plates from Group 2 were more resistant than groups 1 and 3.</span>
文摘Objective: To provide anatomical basis for the internal fixation of scaphoid fractures.Methods: The shape and vascular lake of 48 dry scaphoids and 36 wet scaphoids were observed.Results: The data of dry bone group and wet bone group were as follows: the height of scaphoid tubercle were (11.28±0.94) mm and (10.35±1.54) mm; the thickness of scapoid waist were (12.02±1.90) mm and (11.21±1.20) mm; the width of scapoid waist were (10.59±1.11) mm and (11.34±1.47) mm; the minimal thickness of the body of scapoid were (6.51±1.22) mm and (8.54±1.07) mm; the axis length of scapoid were (25.68±2.21) mm and (26.50±2.56) mm; the width of epicondyle of scaphoid of distal portion, waist and proximal portion were (6.50±1.06) mm, (5.14±1.01) nun, (4.42±1.16)mm and(6.64±1.18) mm, (6.01±0.75)mm and(5.71±0.78) mm, respestively. The main blood vessels came from the dorsal and the radial of wrist and passed through the whole scaphoid along the crest of scaphoid.Conclusion: The internal fixation of scaphoid can be designed according to the anatomical data without damag-ing the articular surface and blood supply.
