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Published on: August 6, 2015
[Heterotopic ossification as a complication of total hip replacement]
A Grzegorzewski1, P Kozłowski, M Synder
1Katedra i Klinika Ortopedii, Akademia Medyczna w Lodzi.
Insights
Heterotopic ossification, a common complication after total hip replacement (THR), was studied in 151 patients. Higher degrees of ossification correlated with reduced hip mobility and increased pain post-surgery.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Context:
- Heterotopic ossification is the most frequent complication following total hip replacement (THR).
- Cementless THR using Mittelmeier and Parhofer-Mönch prostheses were analyzed.
- A lateral surgical approach was consistently used.
Purpose:
- To determine the frequency and distribution of ectopic ossification after cementless THR.
- To evaluate the influence of heterotopic ossification on THR outcomes.
Summary:
- 151 hip joints were assessed with over two years of follow-up.
- Ectopic ossification was classified using the Brooker scale.
- 10.6% of cases exhibited 3rd or 4th-degree ossification.
- Clinical outcomes were evaluated using the d'Aubigne-Postel method.
Impact:
- A significant positive correlation was found between 3rd and 4th-degree heterotopic ossification and decreased hip range of motion.
- Increased pain after THR was also associated with higher degrees of ectopic ossification.
- Findings highlight the impact of heterotopic ossification on functional recovery and patient-reported pain after cementless THR.
Abstract:
Heterotopic ossification is the most common complication after THR. The authors present the distribution of frequency of ectopic ossification after cementless THR using Mittelmeier and Parhofer-Mönch prosthesis and it's influence on THR outcome. 151 hip joints were evaluated with a follow-up period of more than 2 years. All procedures were performed by a lateral approach. The ectopic ossification was verified according to the Brooker classification. Clinical evaluation was performed according to the d'Aubigne-Postel method in Charnley's modification. The 3rd degree ectopic ossification was found in 14 hip joint and 4th degree ectopic ossification in 2 hip joints (together 10.6%). The positive correlation between the degree of ossification (3rd and 4th) and the decrease of range of motion of the hip joint along with an increase in pain after THR was found.
