CAJ | 학술논문

目的观察人工寰齿关节置换后寰枢椎部件抗拔出力强度,评价其生物力学性能.方法在10具正常成年人尸体寰枢关节湿性标本上行人工寰齿关节置换后,在MTS858 Mini Bion-ix生物力学实验机上行寰枢椎部件最大轴向拔出力(F-max)实验.结果寰椎部件最大拔出力(894.36±102.30)N,枢椎部件最大拔出力(1227.59±143.35)N,寰椎部件钉道长度(20.69±1.43)toni,枢椎部件钉道长度(24.03±1.31)mm,寰椎部件屈服长度(1.51±0.11)mm,枢椎部件屈服长度(1.59±0.12)mm.寰枢椎部件的最大拔出力之间和寰枢椎部件的钉道长度之间差异有统计学意义(P<0.05).寰枢椎部件的屈服长度之间差异无统计学意义(P>0.05).寰枢椎部件最大拔出力与钉道长度呈显著正相关(r1=0.880,P<0.05).寰枢椎部件最大拔出力与屈服长度也呈显著正相关(r2=0.606,P<0.05).结论人工寰齿关节置换后寰枢椎部件具有较好的抗拔出力性能.寰椎部件螺钉采用单皮质固定,枢椎部件螺钉采用双皮质固定,钉道长度是影响寰枢椎部件拔出力的蕈要因素.
목적 관찰인공환치관절치환후환추추부건항발출력강도,평개기생물역학성능.방법 재10구정상성년인시체환추관절습성표본상행인공환치관절치환후,재MTS858 Mini Bion-ix생물역학실험궤상행환추추부건최대축향발출력(F-max)실험.결과 환추부건최대발출력(894.36±102.30)N,추추부건최대발출력(1227.59±143.35)N,환추부건정도장도(20.69±1.43)toni,추추부건정도장도(24.03±1.31)mm,환추부건굴복장도(1.51±0.11)mm,추추부건굴복장도(1.59±0.12)mm.환추추부건적최대발출력지간화환추추부건적정도장도지간차이유통계학의의(P<0.05).환추추부건적굴복장도지간차이무통계학의의(P>0.05).환추추부건최대발출력여정도장도정현저정상관(r1=0.880,P<0.05).환추추부건최대발출력여굴복장도야정현저정상관(r2=0.606,P<0.05).결론 인공환치관절치환후환추추부건구유교호적항발출력성능.환추부건라정채용단피질고정,추추부건라정채용쌍피질고정,정도장도시영향환추추부건발출력적심요인소.
Objective To investigate the arias-axis components pull-out strength following artifi-cial atlanto-odontoid joint arthroplasty and evaluate its biomechanical performance. Methods Ten sets of artificial atlanto-odontoid joint used in adults' bony specimens were selected for biomechanical test in MTS858 Mini Bionix machine including the arias-axis components pull-out strength. Results F-maxs were (894.36±102.30) N in the atlas components, and (1227.59±143.35) N in axis components respec-tively. The screw length of atlas components was (20.69±1.43) mm, and that of axis components was (24.03±1.31) mm. The yield length of atlas and axis components was (1.51±0.11) and (1.0.12) mm respectively. There was statistically significant difference between pull-out strength of the atlas-axis components and the screw length of the atlas-axis components (P<0.05). No statistically significant difference was found in the yield length between atlas and axis components (P>0.05). A statistically sig-nificant positive correlation was observed between pull-out strength of the arias-axis components and the screw length of the atlas-axis components (r1=0.880). There was statistically significant positive correla-tion between pull-out strength of the atlas-axis components and the yield length of the atlas-axis compo-nents (r2=0.606). Conclusion The atlas-axis components had excellent biomechanical performance of pull-out strength. The screws of atlas components should be implanted unicortically. The screws of axis components should be implanted bicortically. Screw path length is one of the important factors influencing the arias-axis components pull-out strength.