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Heterotopic ossification. Incidence and relation to trochanteric osteotomy in 100 total hip arthroplasties
Insights
Trochanteric osteotomy may increase the risk of heterotopic ossification after total hip arthroplasty. Avoiding this surgical step could reduce the incidence of this complication, especially in high-risk patients.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Heterotopic ossification (HO) is a potential complication following total hip arthroplasty (THA).
- The role of trochanteric osteotomy (TO) in the development of HO remains unclear.
- HO can negatively impact functional outcomes after THA.
Purpose of the Study:
- To investigate the association between trochanteric osteotomy and the incidence of heterotopic ossification after total hip arthroplasty.
- To evaluate the impact of TO on HO in different risk categories of patients undergoing THA.
Main Methods:
- Retrospective analysis of 100 postoperative radiographs from total hip arthroplasty patients.
- Comparison of HO incidence between patients who underwent TO (n=40) and those who did not (n=60).
- Stratification of patients into high- and low-risk groups for HO development.
Main Results:
- Overall incidence of clinically significant HO was 17%, with 22% in the TO group and 13% in the no-TO group.
- High-risk patients had a 25% incidence of HO, while low-risk patients had an 8% incidence.
- In high-risk patients, TO was associated with 32% HO incidence versus 22% without TO; in low-risk patients, TO was associated with 3% HO incidence versus 16% without TO.
Conclusions:
- Trochanteric osteotomy appears to increase the incidence and severity of clinically significant heterotopic ossification after total hip arthroplasty.
- Avoiding trochanteric osteotomy, when feasible, may reduce the risk of HO, particularly in high-risk individuals.
- Further research is warranted to confirm these findings and optimize surgical techniques to minimize HO risk.
Abstract:
Heterotopic ossification can impair the functional results of total hip arthroplasty. The causative role of trochanteric osteotomy in heterotopic ossification is uncertain. Postoperative radiographs of 100 total hip arthroplasties were analyzed for incidence of heterotopic ossification. Forty procedures were performed with trochanteric osteotomy and 60 without. There was a 17% overall incidence of clinically significant heterotopic ossification, 22% with osteotomy and 13% without. High- and low-risk categories revealed clinically significant heterotopic ossification in 25% of the high-risk group and in 8% of the low-risk group. In the high-risk group there was a 32% incidence with trochanteric osteotomy and 22% without osteotomy. In the low-risk group there was a 16% incidence without trochanteric osteotomy and a 3% incidence with trochanteric osteotomy. The increase in clinically significant heterotopic ossification in the high-risk group over that of the low-risk group was statistically significant. The present study showed that trochanteric osteotomy tended to increase the incidence and severity of clinically significant heterotopic ossification. These data suggest that trochanteric osteotomy should be avoided, if possible, during total hip arthroplasty to decrease the risk of heterotopic ossification.