양측성 고관절 대퇴골두 무혈성 괴사에서 각각 나누어 시행한 HA-coated CLS stem과 non-coated CLS stem의 방사선학적 비교 = Radiological Comparative Analysis of Prospective THA using HA-coated CLS and Non-coated CLS in Bilateral Osteonecrosis

다국어 초록 (Multilingual Abstract)

A prospective radiological follow-up study was performed on 40 total hip arthro- plasties for bilateral osteonecrosis: in all cases, 20 HA-coated CLS(Cementless Spotorno, Protek, Berne, Switzerland) femoral stems in Lt. sides and 20 non-coated CLS titanium-ally femoral stems in Rt. side. The average follow-up was 13 months (mim, 6 months, max. 20 months). The operation was performed by single senior surgeon(J-M Lee) using direct lateral transgluteal approach. In a same patient, same sized stems were used. The first operation was done in more painful hip joint, and the second operation was followed 1-2 weeks later in the other side. At postopertive 6 weeks, half partial weight bearing was allowed. Radiological analysis of last follow-up films demonstrated greater radioluceent line in HA-coated group' 6 cases, which was mainly seen around the uncoated distal part of the stem(p<0.01). The endosteal spot welds was greater in non-coated group,' 10 cases, which was mainly seen around distal part of the stem(p<0.01). Other radiological parameters such as stem subsidence, osteolysis, calcar response and heteotrophic ossification was not stastically significantly different between two kinds of stem. But long-term follow-up was demanding although the early radiological findings showed differences between two kinds of stem.