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Heterotopic ossification after surface replacement arthroplasty and total hip arthroplasty: a randomized study
Krishna Reddi Boddu Siva Rama1, Pascal-André Vendittoli, Muthu Ganapathi
1Department of Surgery, Maisonneuve-Rosemont Hospital, University of Montreal, Montreal, Quebec, Canada.
The Journal of Arthroplasty
|June 7, 2008
Summary
Surface replacement arthroplasty leads to more severe heterotopic ossification than total hip arthroplasty. This bone formation impacts patient outcomes, necessitating careful surgical technique and prophylaxis.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Clinical Research
Background:
- Heterotopic ossification (HO) is a potential complication following hip arthroplasty.
- The incidence and severity of HO may differ between arthroplasty types.
Purpose of the Study:
- To compare the incidence and severity of HO after surface replacement arthroplasty (SRA) versus total hip arthroplasty (THA).
- To evaluate the impact of HO on functional outcomes in hip arthroplasty patients.
Main Methods:
- A randomized clinical trial was conducted.
- Patients undergoing SRA or THA were followed for at least 1 year.
- Incidence and severity of HO (Brooker grades) were assessed.
Main Results:
- SRA group showed a significantly higher rate of severe HO (Brooker grades 3-4) compared to THA (12.6% vs 2.1%, P = .02).
- Grade 4 HO occurred exclusively in the SRA group (4.9%).
- Severe HO was associated with inferior functional outcome scores.
Conclusions:
- Surface replacement arthroplasty is associated with a higher risk of severe heterotopic ossification compared to total hip arthroplasty.
- Patients experiencing severe HO exhibit poorer functional outcomes.
- Surgeons should consider meticulous technique and prophylaxis for SRA to mitigate HO risk.
