寰枢椎前路复位钢板系统的研制及其生物力学

目的研制一种经口咽前路寰枢椎复位钢板内固定系统,评价其生物力学性能。方法研制各种型号经口咽前路寰枢椎复位钢板和复位器等配套器械。选12具新鲜成年颈椎标本,分别进行三维运动范围实验和螺钉拔出力实验。与其它内固定方法作比较分析。结果生物力学测试表明,三维运动范围,该钢板固定和Magerl Brooks固定在各个方向上均无显著差异(P>0.05)。其抗屈伸、侧屈和旋转均强于其它三种内固定方法。寰椎螺钉的最大拔出力显著高于枢椎和C3椎体固定螺钉,枢椎螺钉与C2螺钉等效。结论寰枢椎前路复位钢板系统设计新颖,具有良好的生物力学性能。能满足临床内固定需要。

Design and biomechanical evaluation of transoralpharyngeal atlantoaxial reduction system

Objective To discuss the design of transoralpharyngeal atlan toaxial reduction plate (TARP) system and evaluate its biomechanical performance . Methods A brand-new TARP system was designed which was composed of a butterf ly titanium alloy plate, self-locking screws, an atlantoaxial reductor and othe r accessory instruments. 12 fresh specimens of C0 to C3 were prepared for the bi omechanical test of range of motion (ROM) and screw pull-out strength. The resu lts were compared with those of other methods of internal fixation. Results The biomechanical comparison showed that there was no significant difference in thre e-dimensional ROM between TARP and Magerl Brooks internal fixation. TARP was m ore stable than the other three atlantoaxial fixators: Magerl, Brooks and anteri or transarticular screw. TARP's C1 and C2 screws were strong enough for atlanto axial arthrodesis and their anti-pullout performance was excellent. Conclusio n The design of TARP was novel and the system has excellent biomechanical perfor mance.