LONG-TERM RESULTS OF UNCEMENTED ALUMINA ACETABULAR IMPLANTS
LONG-TERM RESULTS OF UNCEMENTED ALUMINA ACETABULAR IMPLANTS
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DOI：
10.1302/0301-620x.76b1.8300682
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发表时间：
1994-01-01
影响因子：
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通讯作者：
SCHREIBER, V
中科院分区：
文献类型：
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作者：
BOEHLER, M;KNAHR, K;SCHREIBER, V
我们报告了1976年至1979年间植入的67例陶瓷髋臼假体的临床和摩擦学性能，这些假体没有使用骨水泥。他们将陶瓷股骨头固定在金属股骨柄上，平均144个月后，59个关节窝在X线片上稳定，但2个关节窝出现早期松动迹象，6个关节窝出现晚期松动迹象。对取出的组织进行组织学分析，发现所有种植体周围都有纤维膜，有些种植体周围有纤维软骨。无骨长入，纤维膜厚达6 mm，并有淋巴细胞、浆细胞和巨噬细胞浸润。摩擦学分析显示，在两个回收的氧化铝对氧化铝关节中，稳定植入物的总磨损率为2.6 μ m/年，松动植入物的总磨损率为68 μ m/年。生存分析显示，136个月时的翻修率为12.4%。
We report the clinical and tribological performance of 67 ceramic acetabular prostheses implanted between 1976 and 1979 without bone cement. They articulated with ceramic femoral heads mounted on metal femoral stems.After a mean elapsed period of 144 months, 59 sockets were radiographically stable but two showed early signs and six showed late signs of loosening. Four of the loose sockets have been revised.Histological analysis of the retrieved tissue showed a fibrous membrane around all the implants, with fibrocartilage in some. There was no bone ingrowth, and the fibrous membrane was up to 6 mm thick and infiltrated with lymphocytes, plasma cells, and macrophages. Intra- and extracellular birefringent wear particles were seen.Tribological analysis showed total wear rates in two retrieved alumina-on-alumina joints of 2.6 mu m per year in a stable implant and 68 mu m in a loose implant.Survival analysis showed a revision rate of 12.4 % at 136 months.