Wanivenhaus A, Zweymüller K
Orthopädische Univ.-Klinik Wien.
Z Orthop Ihre Grenzgeb. 1988 Sep-Oct;126(5):508-12. doi: 10.1055/s-2008-1044475.
The authors report on the follow-up results of a hemispherical acetabular cup with small pegs, which is designed for cementless implantation in human beings. At an average time of 89 months after implantation, these results reveal a high percentage of 60% loosenings and seam formations of more than 2 mm which could constitute the basis for subsequent loosening. An analysis of these failures attributes the cause to material-engineering as well as design problems associated with the bone pathology. A ceramic cup of this shape is apparently unsuitable for osteointegration. It would appear that the design favours tilting movements and, due to its high E-module, it is unable to compensate for the relative movements of the pelvis.
作者报告了一种带有小钉的半球形髋臼杯的随访结果，该髋臼杯设计用于人体的非骨水泥植入。在植入后平均89个月时，这些结果显示有60%的高松动率以及超过2毫米的缝隙形成，这可能是后续松动的基础。对这些失败情况的分析将原因归因于材料工程以及与骨病理学相关的设计问题。这种形状的陶瓷杯显然不适合骨整合。看起来该设计有利于倾斜运动，并且由于其高弹性模量，它无法补偿骨盆的相对运动。
