Yonsei Med J.  2011 Jul;52(4):655-660. 10.3349/ymj.2011.52.4.655.

Total Hip Arthroplasty Using S-ROM Prosthesis for Dysplastic Hip

• Kang JS
• Moon KH
• Kim RS
• Park SR
• Lee JS
• Shin SH

• KMID: 1727999
• DOI: http://doi.org/10.3349/ymj.2011.52.4.655

Abstract

PURPOSE
The purpose of this study was to evaluate the clinical and radiological results of total hip arthroplasty using a proximal modular femoral stem in patients who had secondary coxarthrosis associated with a dysplastic hip.
MATERIALS AND METHODS
Forty-two patients (45 hips) with secondary coxarthrosis were evaluated after undergoing primary total hip arthroplasty using an S-ROM proximal modular femoral stem. The average follow-up was 80 months (range: 60 to 96 months). Clinical and radiological assessments were performed based on the Harris hip score and the radiological changes around the prosthesis.
RESULTS
The average Harris hip score improved from 52.2 points to 88.5 points. All femoral stems showed stable fixation; there were 37 cases by bony ingrowth and 8 cases by stable fibrous ingrowth. Neither osteolysis nor progressive radiolucent lines around the femoral stem were found at the last follow-up. Forty-one hips (91.9%) revealed excellent or good clinical results at the most recent follow-up.
CONCLUSION
For advanced secondary coxarthrosis, total hip arthroplasty with the use of the proximal modular femoral stem yielded good mid-term results with respect to the clinical and radiological criteria.

Keyword

Dysplastic hip; secondary coxarthrosis; total hip arthoplasty; S-ROM prosthesis

MeSH Terms

Adult
Aged
Arthroplasty, Replacement, Hip/adverse effects/*methods
Female
Femur/*pathology
Hip Dislocation, Congenital/complications/pathology/*surgery
*Hip Prosthesis
Humans
Joint Deformities, Acquired/complications/pathology/*surgery
Male
Middle Aged
Osteoarthritis, Hip/etiology/surgery
Postoperative Complications/pathology

Figure

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  Fig. 1 (A) Radiography of a 40-year-old female shows Crowe's type III dysplasia of the left hip. (B) The follow-up radiograph after 7 years shows a stable femoral stem and cup.

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  Fig. 2 (A) Radiography of a 38-year-old female patient shows Crowe's type IV dysplasia of the right hip. (B) Total hip arthroplasty with femoral shortening osteotomy was performed. The radiograph at five years post operation shows stable cup fixation in the true acetabulum.

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