Radiographic analysis of a low-modulus titanium-alloy femoral total hip component. Two to six-year follow-up.
Radiographic analysis of a low-modulus titanium-alloy femoral total hip component. Two to six-year follow-up.
复制标题
低模量钛合金股骨全髋部件的射线照相分析。
DOI：
10.2106/00004623-198567010-00007
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
T. Gruen
中科院分区：
文献类型：
--
作者：
A. Sarmiento;T. Gruen
我们对323例骨水泥型低模量钛合金全髋关节假体的股骨部件进行了详细的系列影像学分析。股骨部件松动的发生率较低，表现为股骨柄-骨水泥界面的放射性显影区或骨水泥断裂。股骨距吸收和皮质肥大的发生率也较低。我们的数据与其他人的数据比较表明，松动、股骨距吸收和皮质肥大的发生率通常低于设计相似的传统高模量Charnley股骨柄。这些发现似乎支持计算机建模研究，该研究预测了应力沿钛合金假体柄的整个长度沿着更均匀的分布。在使用的两种股骨部件配置中，直型股骨柄显示出松动、股骨距吸收和皮质肥大的影像学证据的发生率显著低于弯型股骨柄。这些发现为第二代股骨部件的进化发展提供了充分的生物力学依据，第二代股骨部件结合了直型股骨柄的许多特征。
We performed a detailed serial radiographic analysis of the femoral component of 323 cemented low-modulus titanium-alloy total hip prostheses. There was a low incidence of femoral component loosening as manifested by radiolucent zones at the stem-cement interface or cement fractures. There was also a low incidence of resorption of the calcar and cortical hypertrophy. Comparison of our data with those of others indicated that the incidence of loosening, calcar resorption, and cortical hypertrophy was usually lower than with similarly designed conventional high-modulus Charnley stems. These findings appear to support computer-modeling studies that have predicted a more even distribution of stresses along the entire length of the stem of the titanium-alloy prosthesis. Of the two configurations of femoral components used, the straight stems demonstrated a significantly lower incidence of radiographic evidence of loosening, calcar resorption, and cortical hypertrophy than the curved stems did. These findings have provided sufficient biomechanical rationale for the evolutionary development of the second-generation femoral components, which incorporate many features of the straight stem.