A comparative study of porous coatings in a weight-bearing total hip-arthroplasty model.
A comparative study of porous coatings in a weight-bearing total hip-arthroplasty model.
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DOI：
10.2106/00004623-198668090-00013
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发表时间：
1986-12
期刊：
影响因子：
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通讯作者：
T. Turner;D. Sumner;R. Urban;D. Rivero;J. Galante
中科院分区：
文献类型：
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作者：
T. Turner;D. Sumner;R. Urban;D. Rivero;J. Galante
本研究的目的是比较骨长入三种类型的多孔涂层，并确定多孔涂层类型和股骨柄覆盖程度对非骨水泥型髋关节置换术中股骨侧骨重塑的影响。对40只犬进行左侧全髋关节置换术。其中30只犬的钛合金股骨假体沿股骨柄前后表面的长度沿着应用了三种类型的商业纯钛多孔材料之一：10只使用烧结纤维金属，10只使用烧结珠，10只使用等离子火焰喷涂涂层。其余10只犬的股骨部件周向涂有商业纯钛，并沿股骨柄长度沿着进行等离子火焰喷涂。每组中，在1个月时处死5只动物，在6个月时处死5只动物。观察到骨长入所有三种类型的多孔涂层中，表明所有部件均牢固固定。到6个月时，与所有组中股骨柄的中间水平相比，股骨柄近端和远端附近的骨长入和新髓骨更多。在1个月时，在珠状表面（25.2%）和纤维金属表面（16.6%）中观察到骨长入无显著差异，但在6个月时，珠状表面（23.3%）的骨长入明显少于纤维金属表面（37.3%）。在所有组中，6个月时观察到近端至远端皮质骨丢失梯度。与使用部分涂层股骨柄的三组犬相比，使用具有环形涂层股骨柄的一组犬出现了更严重的骨丢失。骨丢失的程度取决于多孔涂层的程度而非类型。
The purposes of this study were to compare ingrowth of bone into three types of porous coating and to determine the effect of the type of porous coating and the degree of coverage of the stem on the remodeling of bone on the femoral side in cementless hip arthroplasty. A left total hip arthroplasty was performed in forty dogs. Thirty of the dogs had a titanium-alloy femoral prosthesis that had had one of three types of commercially pure titanium porous material applied along the length of the anterior and posterior surfaces of the stem: ten with sintered fiber-metal, ten with sintered beads, and ten with plasma flame-spray coating. The remaining ten dogs had a femoral component that was circumferentially coated with commercially pure titanium that was plasma flame-sprayed along the length of the stem. In each group, five animals were killed at one month and five were killed at six months. Ingrowth of bone into all three types of porous coating was observed, indicating secure fixation of all components. By six months, there was more ingrowth of bone and new medullary bone adjacent to the proximal and distal aspects of the stems compared with the middle level of the stems in all groups. No significant difference in ingrowth of bone was observed in the beaded surface (25.2 per cent) and the fiber-metal surface (16.6 per cent) at one month, but at six months there was significantly less ingrowth into the beaded surface (23.3 per cent) than into the fiber-metal surface (37.3 per cent). In all groups, a proximal-to-distal gradient of loss of cortical bone was observed by six months. The group of dogs that had the stem with the circumferential coating experienced more severe loss of bone than did the three groups that had a stem with a partial coating. The magnitude of loss of bone was dependent on the extent rather than the type of porous coating.