CAJ | 학술논문

背景：目前单髁膝关节置换中胫骨假体后倾角度的选择存在较多争议，相关的生物力学研究较少。目的：通过有限元分析结果寻求活动平台单髁膝关节置换中合理胫骨后倾的角度。方法：运用三维重建技术及有限元前处理技术建立正常膝关节有限元模型，并进行验证，在此基础上建立不同胫骨假体后倾角度的单髁膝关节置换有限元模型，统一边界条件和载荷，行有限元分析。结果与结论：成功建立了不同胫骨后倾角度的单髁膝关节置换有限元模型，分析结果发现增大胫骨假体后倾可使胫骨后内侧皮质及松质骨应力逐渐增加，且增大了外侧间室载荷和软骨接触应力，而胫骨前倾使胫骨前内侧皮质应力明显增加。推荐活动平台单髁膝关节置换中选择0°-7°胫骨假体后倾。
배경：목전단과슬관절치환중경골가체후경각도적선택존재교다쟁의，상관적생물역학연구교소。목적：통과유한원분석결과심구활동평태단과슬관절치환중합리경골후경적각도。방법：운용삼유중건기술급유한원전처리기술건립정상슬관절유한원모형，병진행험증，재차기출상건립불동경골가체후경각도적단과슬관절치환유한원모형，통일변계조건화재하，행유한원분석。결과여결론：성공건립료불동경골후경각도적단과슬관절치환유한원모형，분석결과발현증대경골가체후경가사경골후내측피질급송질골응력축점증가，차증대료외측간실재하화연골접촉응력，이경골전경사경골전내측피질응력명현증가。추천활동평태단과슬관절치환중선택0°-7°경골가체후경。
BACKGROUND:At present, there stil remain controversies concerning the choice of tibial slope in unicompartmental knee arthroplasty, and the related biomechanical studies are rare. OBJECTIVE:To find the rational tibial slope in mobile-bearing unicompartmental knee arthroplasty through the results of finite element analysis. METHODS:A finite element model of normal knee was established and validated using the techniques of three-dimensional reconstruction and finite element pre-processing. Then the finite element models of unicompartmental knee arthroplasty with different tibial slopes were established based on the normal knee model. The finite element analyses were conducted after the boundary conditions and loads were unified. RESULTS AND CONCLUSION: The finite element models of unicompartmental knee arthroplasty with different tibial slopes were established successfuly. The results of the finite element analyses indicated that the posteromedial tibial cortical and cancelous bone stress increased gradualy as the posterior slope increasing, as wel as the load distribution and the cartilage contact pressures of lateral compartment. The anteromedial tibial cortical stress increased significantly with the anterior slope. A posterior tibial slope of 0°-7° can be recommended when implanting a mobile-bearing unicompartmental knee arthroplasty.