CAJ | 학술논문

目的探讨髋表面置换股骨侧假体外翻位植入后股骨近端的应力变化,并寻求最佳外翻植入角度.方法建立正常股骨近端髋表面置换股骨侧假体(Wright假体)三维模型,其中股骨假体按解剖颈干角(本文选用股骨模型的生理解剖颈干角为135°)、外翻5°、10°、15°植入,加载关节合力及相关肌肉的肌力负荷,分析假体植入前后股骨近端的应力分布变化,并对股骨近端假体周围区域骨质应力分布进行分区量化研究.结果股骨假体轻度外翻植入降低了股骨头颈交界处上方(2、8区)的应力,5°外翻植入股骨头上方假体杯下缘(1、7区)应力遮挡最小,股骨颈下方(4、10区)应力分布更接近正常股骨.结论外翻5°植入假体股骨近端应力更接近正常股骨,降低了股骨颈骨折和假体松动的危险.
목적 탐토관표면치환고골측가체외번위식입후고골근단적응력변화,병심구최가외번식입각도.방법 건립정상고골근단관표면치환고골측가체(Wright가체)삼유모형,기중고골가체안해부경간각(본문선용고골모형적생리해부경간각위135°)、외번5°、10°、15°식입,가재관절합력급상관기육적기력부하,분석가체식입전후고골근단적응력분포변화,병대고골근단가체주위구역골질응력분포진행분구양화연구.결과 고골가체경도외번식입강저료고골두경교계처상방(2、8구)적응력,5°외번식입고골두상방가체배하연(1、7구)응력차당최소,고골경하방(4、10구)응력분포경접근정상고골.결론 외번5°식입가체고골근단응력경접근정상고골,강저료고골경골절화가체송동적위험.
Objective To determine an ideal angle for prosthesis implantation after analyzing the stress distribution on the proximal femur after valgus implantation of hip resurfacing arthroplasty.Methods A three-dimensional finite element model of intact femur was developed for implantation of the Wright hip resudaeing prosthesis at valgus degrees of 0°,5°,10°,and 15°.After articular resultant forces and related muscles' forces were loaded,changes in stresses on the proximal femur before and after implantation were analyzed.Results A slightly valgus orientation reduced the stress on the superior neck around the head-neck junction (sections 2 & 8).In the implantation at valgus degrees of 5°,the stress shielding in the proximal sections (sections 1 & 7) was the minimum,and the stress distribution in sections 4 and 10 were close to that in the case of an intact femur.Conclusion A valgus 5° implantation in hip resudacing arthroplasty may result in a stress distribution on the proximal femur similar to the normal value and thus may decrease the risks of femoral neck fracture and aseptic loosening of the femoral component.