摘要
目的探讨股骨头部分切除行生物性假体人工股骨头置换对股骨近端载荷性能的影响，以评估置换后假体的稳定性。方法选取24具正常青壮年新鲜股骨（包括股骨头）标本，其中8具标本利用自行研究设计的假体，行人工股骨头置换术，8具设为对照组，8具设为疲劳组。建立单腿站立位股骨头受力模型，生物力学测定仪测试2000N载荷下部分人工股骨头置换前后股骨颈基底外上方（A）、股骨颈内侧小转子部（B）及股骨大转子下方（C）的载荷-应力和载荷-位移的差异。结果载荷为2000N时，人工股骨头置换后的实验组，在股骨颈内侧小转子部及股骨大转子下方的载荷-应力与正常股骨头组比较，差异无统计学意义（P〉0．05），而在股骨颈基底外上方的载荷-应力与正常股骨头组比较，差异有统计学意义（P〈0．05）。疲劳组与假体组、正常组A、B、C点各载荷应力比较，差异均无统计学意义（P〉0．05）。结论股骨头部分切除后，人工股骨头置换的生物性假体能有效维持股骨近端的正常应力传递。
Objective To investigate effect of the biological prosthesis on load properties of th proximal femur after hemiarthroplasty with partial resection of the femoral head in order to assess stabilit of the prosthetic implant. Methods Twenty-four young fresh normal femur （ with preservation of femo ral head） specimens were assigned to prosthesis group （n = 8 ） , control group （n = 8 ） and fatigue grou （ n = 8 ）. Specimens in prosthesis group underwent artificial femoral head replacement using self-designe, prostheses. Stress at the femoral head with the model standing on one leg was performed. Biomeehani cal machine was used to detect the difference of load-stress and load-displacement before and afte femoral head replacement under the load of 2000 N. Detection points included lateral superior base c femoral neck （A） , medial side of lesser troehanter of femur （B） , and inferior side of greater tro chanter of femur （ C ）. Results At the load of 2 000 N, the load-stress at inferior side of greater trc chanter of femur and medial side of lesser troehanter of femur revealed no significance differences hetwee the normal femur and femur with artificial femoral head replacement （ P 〉 0.05 ） , while the difference wa significant at lateral superior base of femoral neck （ P 〈 0.05 ）. There were no significant differences load-stress at A, B, and C points among fatigue group, prosthesis group and control group （ P 〉 0.05 ） Conclusion After partial femoral head replacement, the biological prosthesis is effective in mainte nance of the normal stress transfer in the proximal femur.
出处
《中华创伤杂志》
CAS
CSCD
北大核心
2013年第12期1170-1173,共4页
Chinese Journal of Trauma
基金
宁波市科技计划资助项目（2011C50066）
上海市宝山区科委资助项目（12-E-12）
关键词
关节成形术
置换
髋
髋假体
股骨头
Arthroplasty, replacement, hip
Hip prosthesis
Femur head
