Bloebaum R D, Rubman M H, Hofmann A A
Bone and Joint Research Laboratory, Department of Veterans Affairs Medical Center, Salt Lake City, UT 84148.
J Arthroplasty. 1992 Dec;7(4):483-93. doi: 10.1016/s0883-5403(06)80069-0.
Ten asymmetric porous-coated tibial knee components were consecutively retrieved from nine patients with implantation times ranging from 1 week to 48 months. Morselized autograft bone chips were applied to the resected surface of the tibia prior to component implantation. Microradiographic analysis showed bone in contact with 64 +/- 10% of the porous-coated interface. Backscattered electron imaging of the bone-implant interface revealed bone within 8-22% of the porous coating. Although bone in the form of autograft bone chips was observed in the porous coating of the 1 and 3 week specimens, it was not connected to the host bone. By 3 and 6 months, the bone chips were integrated and connected to the host bone providing osseous continuity from the porous coating to the skeleton. This study shows that reproducible bone ingrowth into porous-coated tibial components is achievable using autograft bone chips to promote bone fixation.
从9名患者中连续取出10个不对称多孔涂层胫骨膝关节组件，植入时间从1周到48个月不等。在植入组件之前，将碎骨自体移植骨屑应用于胫骨的切除表面。显微放射学分析显示，骨与64±10%的多孔涂层界面接触。骨-植入物界面的背散射电子成像显示，多孔涂层内8-22%有骨组织。尽管在1周和3周标本的多孔涂层中观察到了自体移植骨屑形式的骨，但它与宿主骨没有连接。到3个月和6个月时，骨屑已整合并与宿主骨连接，从多孔涂层到骨骼提供了骨连续性。这项研究表明，使用自体移植骨屑促进骨固定，可实现多孔涂层胫骨组件中可重复的骨长入。
