Hydroxyapatite-coated femoral stems -: Histology and histomorphometry around five components retrieved at post mortem

被引:92
作者
Tonino, AJ [1 ]
Thèrin, M [1 ]
Doyle, C [1 ]
机构
[1] De Wever Hosp, Dept Orthopaed, NL-6401 CX Heerlen, Netherlands
来源
JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME | 1999年 / 81B卷 / 01期
关键词
D O I
10.1302/0301-620X.81B1.8948
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
We performed a histological and histo-morphometric examination in five cadaver specimens of the femoral and acetabular components and the associated tissue which had been recovered between 3.3 and 6.2 years after primary total hip arthroplasty (THA) using a proximal hydroxyapatite HA)-coated titanium alloy implant. All had functioned web during the patients' life. All the stems were fixed in the femur and showed osseointegration of both the proximal and distal parts. The amount of residual HA was greatest. in the distal metaphyseal sections, indicating that the rate of bone remodelling may be the main factor causing loss of HA. The level of activity of the patient was the only clinical factor which correlated with loss of coating. The percentage of bone-implant osseointegration was almost constant, regardless of the amount of HA residue, periprosthetic bone density or the time of implantation. HA debris was seldom observed and if present did not cause any adverse or inflammatory reaction. Partial debonding did occur in one case as a result of a polyethylene-induced inflammatory reaction.
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页码:148 / 154
页数:7
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