Meldrum Russell D, Willie Bettina M, Bloebaum Roy D
Indiana University, School of Medicine, Department of Orthopedics, 541 Clinical Drive, Room 600, Indianapolis, IN 46202-5111, USA.
Iowa Orthop J. 2003;23:103-7.
Implant analysis was conducted on a retrieved Mayo femoral prosthesis that has a non-anatomic design with two distinct surfaces intended for osseous fixation. The prosthesis itself has a circumferential grit-blasted region interposed with the porous surfaces and involving the entire proximal stem. In addition, there are pads of mesh porous coating on the anterior, posterior, and medial surfaces proximally. A single, radiographically stable stem retrieved after 18 months secondary to recurrent dislocations was examined for osseous fixation by measurement of trabecular bone into the porous-coated and onto the grit-blasted surfaces of the stem. Results showed 17% +/- 7% bone ingrowth into the porous coated areas and 20% +/- 16% osseointegration onto the grit-blasted surfaces. These results are similar to percentages of ingrowth seen with more conventional, anatomic design prostheses.
对一个回收的梅奥股骨假体进行了植入分析，该假体采用非解剖设计，有两个不同的用于骨固定的表面。假体本身有一个圆周喷砂区域，介于多孔表面之间，且涉及整个近端柄。此外，近端的前、后和内侧表面有网状多孔涂层垫。对一个因复发性脱位在18个月后取出的、影像学稳定的单一柄进行了骨固定检查，通过测量骨小梁长入柄的多孔涂层区域和喷砂表面来评估。结果显示，多孔涂层区域的骨长入率为17%±7%，喷砂表面的骨整合率为20%±16%。这些结果与更传统的解剖设计假体的长入百分比相似。
