Baleani M, Viceconti M, Walchholz K, Toni A
Laboratorio di Tecnologia dei Materiali, Istituti Ortopedici Rizzoli, Bologna.
Chir Organi Mov. 1997 Jul-Sep;82(3):231-8.
Two cementless hip arthroplasty models with a modular neck made titanium alloy were submitted to cyclical loading in air, in physiological solution, and in a solution for accelerated corrosion tests in order to study the damage process of modular couplings. Thereafter, on one of the two models a series of tests were conducted in order to evaluate the quality of debris produced by the couplings. The parameters of testing adopted allow us to estimate the production of metallic debris observable in vivo with this type of prosthetic stem. The results show that the couplings of modular prostheses may be the source of metallic debris. The amount of debris produced depends on the geometry of the coupling and of the entire implant. Good planning and realization of the couplings, however, reduce the phenomenon that is negligible as compared to other potential sources of debris such as the surface of the stem or of the prosthetic head.
两个带有模块化颈部的非骨水泥型钛合金髋关节置换模型在空气中、生理溶液中以及加速腐蚀试验溶液中进行循环加载，以研究模块化连接件的损伤过程。此后，在这两个模型中的一个上进行了一系列测试，以评估连接件产生的碎屑质量。所采用的测试参数使我们能够估计使用这种类型假体柄在体内可观察到的金属碎屑的产生情况。结果表明，模块化假体的连接件可能是金属碎屑的来源。产生的碎屑量取决于连接件和整个植入物的几何形状。然而，连接件的良好设计和制造可减少这种现象，与其他潜在的碎屑来源（如柄或假体头的表面）相比，这种现象可忽略不计。
