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KMID : 0361619960310020319
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Journal of the Korean Orthopaedic Association
1996 Volume.31 No. 2 p.319 ~ p.327
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Hydroxyapatite-Coated Primary Total Hip Arthroplasty -Minimum two year clinical, roentgenographic analysis
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Kong In-Deok
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Abstract
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Plasma sprayed coating of the hydroxyapatite(HA) are biocompatible and may contribute to the early fixation of total joint prosthesis. We studied 64 hips(58 patients) who had hydroxyapatite coated primary total hip arthroplasty during the period
from
January 1992 to June 1993 about clinical and radiological results prospectively. The components have been followed for a minimum of 26 months and an average 31 months. Harris hip score averaged 92 at most recent follow up intervals. At the last
follow
up, the pain in 7 cases(11%) respectively and only slightly to mild in mostly. Although thigh pain has been occurred in 7 cases(11%), all patients had not trouble in daily activity.
In radiological evaluation, there was a rapid and good endosteal bone formation of implants with bone apposition on the Gruen zone 2 and 6 of HA coating area. No radiolucent line formation was detected around HA coated area. In acetabular
component, the
endosteal bone formation was found in 12 cases and the radiolucent line was occure in 4 cases. No revision were done for the femoral and acetabular component.
The result of the study indicate that this hydroxyapatite coated component can provide satisfactory clinical and radiological result. Futner prospective follow up is necessary to determine whether the favorable early result of this implant are
maintained over longer period.
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