Maistrelli G, Sessa V, Fornasier V L
University of Toronto, Canada.
Ital J Orthop Traumatol. 1991 Sep;17(3):387-93.
The advantages of the use of ceramic in prosthetics are well-known, especially the fact that the coefficient of friction is significantly lower at the bone-ceramic interface than at the bone-metal interface. For this reason, ceramic is used for the cephalic component of the hemiarthroplasty. The advantages of ceramic, however, are purely theoretical, and have never been scientifically proven. The aim of our study, conducted on 20 dogs, was to observe the long-term effects of femoral prosthesis with a ceramic or cobalt-chromium cephalic component upon the acetabular cartilage. Our research was conducted on homogeneous groups of dogs under similar conditions. At 8 months, the results showed evident cartilage damage that was equal in both groups. We therefore conclude that as far as everyday wear neither material is favored over the other.
在假肢中使用陶瓷的优点是众所周知的，尤其是骨-陶瓷界面处的摩擦系数明显低于骨-金属界面这一事实。因此，陶瓷被用于半关节置换术的头部组件。然而，陶瓷的优点纯粹是理论上的，从未得到科学证实。我们对20只狗进行了研究，目的是观察具有陶瓷或钴铬合金头部组件的股骨假体对髋臼软骨的长期影响。我们的研究是在相似条件下对同质的狗群进行的。8个月时，结果显示两组均出现明显的软骨损伤。因此我们得出结论，就日常磨损而言，两种材料并无优劣之分。
