Berahmani Sanaz, Janssen Dennis, Wolfson David, Rivard Kori, de Waal Malefijt Maarten, Verdonschot Nico
Orthopaedic Research Laboratory, Radboud University Medical Center, Nijmegen, The Netherlands.
DePuy Synthes Joint Reconstruction, Leeds, UK.
J Arthroplasty. 2015 Feb;30(2):300-7. doi: 10.1016/j.arth.2014.09.030. Epub 2014 Oct 2.
We investigated the effect of surface morphology on the mechanical performance of uncemented femoral knee prosthesis. Eighteen implants were implanted on nine paired femurs and then pushed-off (left legs: a novel surface morphology; right legs: Porocoat as baseline). Bone mineral density (BMD) and anteroposterior dimension were not significantly different between groups. The insertion force was not significantly different, however, the loosening force was significantly higher in the novel group (P=0.007). BMD had a direct relationship with the insertion and loosening force (P<0.001). The effect of surface morphology on implant alignment was very small. We conclude that the surface properties create a higher frictional resistance, thereby providing a better inherent stability of implants featuring the novel surface morphology.
我们研究了表面形态对非骨水泥型股骨膝关节假体力学性能的影响。将18个植入物植入9对股骨，然后进行推出试验（左腿：新型表面形态；右腿：Porocoat作为基线）。两组之间的骨矿物质密度（BMD）和前后径无显著差异。插入力无显著差异，然而，新型组的松动力显著更高（P = 0.007）。BMD与插入力和松动力呈直接关系（P < 0.001）。表面形态对植入物对线的影响非常小。我们得出结论，表面特性产生了更高的摩擦阻力，从而为具有新型表面形态的植入物提供了更好的固有稳定性。
