中华创伤杂志
中華創傷雜誌
중화창상잡지
Chinese Journal of Traumatology
2014年
2期
164-169
,共6页
徐晖%吴爱悯%陈鸥%徐华梓%王向阳%池永龙
徐暉%吳愛憫%陳鷗%徐華梓%王嚮暘%池永龍
서휘%오애민%진구%서화재%왕향양%지영룡
颈椎%有限元分析%内固定器%手术,微创性
頸椎%有限元分析%內固定器%手術,微創性
경추%유한원분석%내고정기%수술,미창성
Cervical vertebrae%Finite element analysis%Internal fixators%Surgical procedures,minimally invasive
目的 通过建立寰枢椎不稳的病理三维有限元模型并模拟经皮前路关节突螺钉(anterior transarticular screw,ATS)和后路关节突螺钉(posterior transarticular screw,PTS)内固定术式,比较2种内固定的生物力学性能. 方法 利用志愿者的上颈椎螺旋CT扫描资料,通过Mimics、Free form和Ansys等软件的协同作用,建立寰枢关节不稳的病理三维有限元模型,并模拟经皮ATS和PTS内固定术式,将双侧螺钉分别加载到模型中,比较在40N的预载荷和1.5N·m力矩下,前屈、后伸、侧屈和旋转4种工况下两种内固定方式的生物力学性能. 结果 在前屈、后伸、侧屈和旋转4种工况下,2种内固定方式都能最大限度抑制C1～C2的运动,达到固定目的.经皮ATS在全部4种工况下,ATS所承受的最大应力均大于PTS,最大位移均小于PTS. 结论 经皮C1～C2 ATS和PTS内固定能稳定寰枢关节,经皮C1～C2 ATS的生物力学效能优于经皮C1～ C2PTS.
目的 通過建立寰樞椎不穩的病理三維有限元模型併模擬經皮前路關節突螺釘(anterior transarticular screw,ATS)和後路關節突螺釘(posterior transarticular screw,PTS)內固定術式,比較2種內固定的生物力學性能. 方法 利用誌願者的上頸椎螺鏇CT掃描資料,通過Mimics、Free form和Ansys等軟件的協同作用,建立寰樞關節不穩的病理三維有限元模型,併模擬經皮ATS和PTS內固定術式,將雙側螺釘分彆加載到模型中,比較在40N的預載荷和1.5N·m力矩下,前屈、後伸、側屈和鏇轉4種工況下兩種內固定方式的生物力學性能. 結果 在前屈、後伸、側屈和鏇轉4種工況下,2種內固定方式都能最大限度抑製C1～C2的運動,達到固定目的.經皮ATS在全部4種工況下,ATS所承受的最大應力均大于PTS,最大位移均小于PTS. 結論 經皮C1～C2 ATS和PTS內固定能穩定寰樞關節,經皮C1～C2 ATS的生物力學效能優于經皮C1～ C2PTS.
목적 통과건립환추추불은적병리삼유유한원모형병모의경피전로관절돌라정(anterior transarticular screw,ATS)화후로관절돌라정(posterior transarticular screw,PTS)내고정술식,비교2충내고정적생물역학성능. 방법 이용지원자적상경추라선CT소묘자료,통과Mimics、Free form화Ansys등연건적협동작용,건립환추관절불은적병리삼유유한원모형,병모의경피ATS화PTS내고정술식,장쌍측라정분별가재도모형중,비교재40N적예재하화1.5N·m력구하,전굴、후신、측굴화선전4충공황하량충내고정방식적생물역학성능. 결과 재전굴、후신、측굴화선전4충공황하,2충내고정방식도능최대한도억제C1～C2적운동,체도고정목적.경피ATS재전부4충공황하,ATS소승수적최대응력균대우PTS,최대위이균소우PTS. 결론 경피C1～C2 ATS화PTS내고정능은정환추관절,경피C1～C2 ATS적생물역학효능우우경피C1～ C2PTS.
Objective To develop a three-dimensional finite element model of atlantoaxial instability and compare the biomechanical properties of percutaneous anterior transarticular screw (ATS) and posterior transarticular screw (PTS) fixations.Methods A pathologic three-dimensional finite element model of atlantoaxial instability was developed from CT images of the upper cervical spine of volunteers with the aid of softwares,such as Mimics,Freeform,and Ansys.Percutaneous C1-2 ATS and PTS fixation modes were simulated and implanted to the model.Under the preload of 40 N and force moment of 1.5 Nm in anterior flexion,posterior extension,lateral bending,and axial rotation,biomechanical properties of the two fixation modes were compared.Results Under the four loading modalities,both fixation techniques provided maximal inhibition on C1-2 movement.The maximal stress for ATS was larger than that for PTS and maximal displacement for ATS was smaller than that for PTS.Conclusions Both ATS and PTS provide similar outlook and are effective to stabilize the atlantoaxial joint.Biomechanical performance of percutaneous C1-2 ATS is better than that of percutaneous C1-2 PTS.
