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
Objective To evaluate the clinical application of atlantoaxial joint fusion using anterior transarticular screw fixation and bone grafting for atlantoaxial joint instability. Methods Twenty-three cases of atlantoaxial...Objective To evaluate the clinical application of atlantoaxial joint fusion using anterior transarticular screw fixation and bone grafting for atlantoaxial joint instability. Methods Twenty-three cases of atlantoaxial joint instability were展开更多
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.
文摘Objective To evaluate the clinical application of atlantoaxial joint fusion using anterior transarticular screw fixation and bone grafting for atlantoaxial joint instability. Methods Twenty-three cases of atlantoaxial joint instability were
