고도 고관절 이형성증에서 전자하 단축 절골술과 동반하여시행한 무시멘트
Short Term Results of Cementless Total Hip Arthroplasty with SubtrochantericShortening osteotomy in SevereDysplasia of Hip
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목적: 고도 고관절 이형성증에서 전자하 단축 절골술을 동반한 무시멘트 고관절 전치환술의 임상적, 기능적, 방사선학적 결과를 분석하였다. 방법 및 재료: 1997년 8월부터 2004년 9월까지 고도 고관절 이형성증으로 수술받은 17예의 고관절을 대상으로 하였다. 수술 후 평균 추시 기간은 52.9개월 (범위: 26~106개월)이었다. 임상적 평가는 수술 전,후로 Harris 고관절 점수, 하지부동, 합병증 등을 분석하였고, 기능적 평가를 위해 보행분석을 7예에서, Cybex 검사를 외전근 근력에 중점을 두어 8예에서 시행하였다. 방 사선학적으로는 절골술 부위의 골유합과 안정성을 비롯해 대퇴부와 비구부를 관찰하였다. 결과: Harris 고관절 점수는 수술 전 평균 65.1점 (23~87점)에서 수술 후 최종 추시 시 평균 88.2점 (72~100점)으로 호전되었 다. 하지 부동은 수술 전 평균 3.7 cm (1~7 cm)에서 수술 후 평균 1.6 cm (0.5~3.3 cm)으로 향상되었다. 모든 예에서 술후 평 균 5.5개월에 절골 부위의 골 유합 소견을 보였으며 동종골 이식 부위의 골 유합 또한 술 후 평균 6개월 만에 얻을 수 있었다. 보행 분석 결과 모든 예에서 호전된 양상을 보였으나 일부 파행이 남아있었고, Cybex 검사를 시행한 8예 중 6예에서 술후 외전 근의 최대토크가 호전되었다. 결론: 고도 고관절 이형성증에 대한 전자하 단축 절골술을 동반한 무시멘트 고관절 전치환술은 유용한 수술 방법이라 사료되나 술 후 HHS의 호전에도 불구하고 외전근력의 저하가 발생할 수 있다는 점에서 보행분석과 Cybex 검사는 술 후 추시상 매우 유 용한 도구라 사료되었다.
Abstract
Purpose: This study examined the clinical, functional and radiological results of total hip arthroplasty with subtrochanteric shortening osteotomy in severe dysplasia of hip. Materials and Methods: Seventeen cases of severe dysplasia of the hip, which were treated with total hip arthroplasty with subtrochanteric shortening osteotomy from August 1997 to September 2004, were evaluated. The mean follow-up duration was 52.9 months (range: 26~106). Harris hip score (HHS), leg length discrepancy (LLD) and complication were assessed clinically. Gait analysis (7 cases) and Cybex study (8 cases) for the abductor muscle power were assessed functionally. Bony union and stability around the osteotomy site of the femoral and acetabular components was assessed radiologically. Results: The mean HHS improved from 65.1 (range: 23~87) points preoperatively to 88.2 (range: 72~100) points at the last follow-up. The mean LLD improved from 3.7 (range: 1~7) cm preoperatively to 1.6 (range: 0.5~3.3) cm postoperatively. All cases showed complete bony union of the allograft in the acetabulum and osteotomy site at a mean time of 6 months postoperatively. Gait analysis improved in all cases but there was some limping gait remaining. On the Cybex study, 6 out of 8 cases showed improved abductor muscle peak toque, postoperatively. Conclusion: A cementless total hip arthroplasty with subtrochanteric shortening osteotomy is believed to be a useful treatment for severe dysplasia of hip. Despite the improving HHS, the abductor power can be decreased. In these points, gait analysis and the Cybex study are helpful on the follow-up.
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