Objective To study the effect of using improved 2D computer-assisted fluoroscopic navigation through simulating 3D vertebrae image to guide pedicle screw internal fixation.Methods Posterior pedicle screw internal fixa...Objective To study the effect of using improved 2D computer-assisted fluoroscopic navigation through simulating 3D vertebrae image to guide pedicle screw internal fixation.Methods Posterior pedicle screw internal fixation,distraction展开更多
Objective： To analyze the application of vertebral pedicle screw fixation in the treatment of burst fracture of thoracolumbar vertebrae. Methods： A total of 48 cases （31 males and 17 females, aged from 18-72 years...Objective： To analyze the application of vertebral pedicle screw fixation in the treatment of burst fracture of thoracolumbar vertebrae. Methods： A total of 48 cases （31 males and 17 females, aged from 18-72 years, mean： 41.3 years ） with thoracolumbar vertebrae burst fracture were treated by pedicle screw system since January 2004. According to the AO classification of thoracolumbar vertebrae fracture, there are 36 cases of Type A, 9 of Type B and 3 of Type C. Results： All patients were followed up for 6-25 months （average 12 months ）, no secondary nerve root injury, spinal cord injury, loosening or breakage of pedicle screw were observed. The nerve function of 29 patients with cauda eqnina nerve injury was restored to different degrees. The vertebral body height returned to normal level and posterior process angle was rectified after operation. Conclusions： The vertebral pedicle screw internal fixation was technologically applicable, which can efficiently reposition and stablize the bursting fractured vertabrae, indirectly decompress canalis spinalis, maintain spine stablity, scatter stress of screw system, reduce the risk of loosening or breakage of screw and loss of vertebral height, and prevent the formation of posterior convex after operation.展开更多
Objective： To compare the potential incidence of nerve root （ventral and dorsal ramus） injury caused by cervical transarticular screws and Roy-Camille lateral mass screws. Methods ： Insertion techniques with Kleka...Objective： To compare the potential incidence of nerve root （ventral and dorsal ramus） injury caused by cervical transarticular screws and Roy-Camille lateral mass screws. Methods ： Insertion techniques with Klekamp transarticular screws and Roy-Camille lateral mass screws were respectively performed in this study. Each technique involved four specimens and 40 screws, which were inserted from C3 to C7. And 20-mm-long screws were used to overpenetrate the ventral cortex. The anterolateral aspect of the cervical spine was carefully dissected to allow observation of the screw-ramus relationship. Results ： The overall percentage of nerve invasion was significantly lower with Klekamp （45%） technique than with Roy-Camille （ 85 %） technique （ P 〈 0.05 ）. The largest percentage of nerve invasion for Klekamp transarticular screws was found at the dorsal ramus （25 % ）, followed by the ventral ramus （ 15 % ） and the bifurcation of the ventral dorsal ramus （ 5 % ）. The largest percentage of nerve invasion for Roy-Camille lateral mass screws was found at the ventral ramus （80 % ）. Conclusion ： The potential risk of nerve root invasion is lower with Klekamp transarticular screws than with Roy Camille lateral mass screws.展开更多
文摘Objective To study the effect of using improved 2D computer-assisted fluoroscopic navigation through simulating 3D vertebrae image to guide pedicle screw internal fixation.Methods Posterior pedicle screw internal fixation,distraction
文摘Objective： To analyze the application of vertebral pedicle screw fixation in the treatment of burst fracture of thoracolumbar vertebrae. Methods： A total of 48 cases （31 males and 17 females, aged from 18-72 years, mean： 41.3 years ） with thoracolumbar vertebrae burst fracture were treated by pedicle screw system since January 2004. According to the AO classification of thoracolumbar vertebrae fracture, there are 36 cases of Type A, 9 of Type B and 3 of Type C. Results： All patients were followed up for 6-25 months （average 12 months ）, no secondary nerve root injury, spinal cord injury, loosening or breakage of pedicle screw were observed. The nerve function of 29 patients with cauda eqnina nerve injury was restored to different degrees. The vertebral body height returned to normal level and posterior process angle was rectified after operation. Conclusions： The vertebral pedicle screw internal fixation was technologically applicable, which can efficiently reposition and stablize the bursting fractured vertabrae, indirectly decompress canalis spinalis, maintain spine stablity, scatter stress of screw system, reduce the risk of loosening or breakage of screw and loss of vertebral height, and prevent the formation of posterior convex after operation.
文摘Objective： To compare the potential incidence of nerve root （ventral and dorsal ramus） injury caused by cervical transarticular screws and Roy-Camille lateral mass screws. Methods ： Insertion techniques with Klekamp transarticular screws and Roy-Camille lateral mass screws were respectively performed in this study. Each technique involved four specimens and 40 screws, which were inserted from C3 to C7. And 20-mm-long screws were used to overpenetrate the ventral cortex. The anterolateral aspect of the cervical spine was carefully dissected to allow observation of the screw-ramus relationship. Results ： The overall percentage of nerve invasion was significantly lower with Klekamp （45%） technique than with Roy-Camille （ 85 %） technique （ P 〈 0.05 ）. The largest percentage of nerve invasion for Klekamp transarticular screws was found at the dorsal ramus （25 % ）, followed by the ventral ramus （ 15 % ） and the bifurcation of the ventral dorsal ramus （ 5 % ）. The largest percentage of nerve invasion for Roy-Camille lateral mass screws was found at the ventral ramus （80 % ）. Conclusion ： The potential risk of nerve root invasion is lower with Klekamp transarticular screws than with Roy Camille lateral mass screws.
