Original ArticleOutcome of the Contralateral Hip in Rapidly Destructive Arthrosis After Total Hip Arthroplasty: A Preliminary Report
Section snippets
Patients
Between January 1986 and December 1999, 27 patients underwent THA in our institution based on the previously reported criteria of RDA 1, 2, 3, 5: a clinical history of hip pain of 1 to 6 months' duration, a radiographic appearance of rapid joint space narrowing (>2 mm in 1 year or 50% joint space narrowing in 1 year) and progression of bone destruction involving the femoral head and the acetabulum with minimal osteophyte formation, and the absence of clinical or laboratory evidence of sepsis
Results
Twenty-four of 27 patients were followed (follow-up rate, 89%). Two cases died and one case dropped out. They consisted of 8 males and 16 females. The mean age at the initial THA for RDA was 71.0 years (range, 52-88 years). The mean duration of radiographic follow-up was 7.0 years (range, 3.8-17.8 years). The contralateral side at the time of initial THA was right in 8 and left in 16.
Three (12.5%) of 24 patients developed contralateral hip osteoarthritis during the course of this study, whereas
Discussion
Based on a study of patients with osteoarthritis, Ritter et al [7] reported that the probability of developing osteoarthritis in the contralateral hip after THA was 36.5% at 10 years. In our series, 3 (12.5%) of 24 patients with RDA developed osteoarthritis in the contralateral hip. This result suggests that patients with RDA may not have a higher risk of developing osteoarthritis in the contralateral hip after THA than patients with osteoarthritis.
In our series, one of 3 patients demonstrated
Acknowledgment
This work is supported in part by a Grant-in-Aid in Scientific Research (No. 15591587) from JSPS and a grant from Uehara Memorial Foundation.
We would like to thank Naoko Kinukawa (Department of Medical Informatics, Kyushu University, Fukuoka, Japan) for her helpful advice on the statistical analysis.
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This work is supported in part by a Grant-in-Aid in Scientific Research (No. 15591587) from JSPS and a grant from Uehara Memorial Foundation.