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Three-view radiographic assessment of heterotopic ossification after acetabular fracture surgery
1Division of Orthopaedic Traumatology, Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA.
Insights
Heterotopic ossification (HO) after acetabular fracture surgery can limit hip motion. A modified grading system using three radiographic views accurately correlates with hip range of motion, outperforming the standard Brooker classification.
Area of Science:
- Orthopedic surgery
- Radiology
- Rehabilitation medicine
Background:
- Heterotopic ossification (HO) is a common complication following operative treatment for acetabular fractures.
- HO can lead to significant hip joint stiffness and reduced range of motion, impacting patient function.
- Accurate assessment of HO is crucial for understanding its impact on hip biomechanics.
Purpose of the Study:
- To evaluate the relationship between the extent of heterotopic ossification (HO) and hip range of motion (ROM) after acetabular fracture surgery.
- To compare the accuracy of the standard Brooker classification with a modified radiographic classification in assessing HO's impact on hip ROM.
Main Methods:
- Analysis of a random sample of 100 patients with operative acetabular fracture treatment and at least one-year follow-up.
- Blinded grading of HO using the standard Brooker classification (AP view) and a modified classification (AP pelvis, internal, and external Judet oblique views).
- Comparison of hip ROM in affected limbs with contralateral normal limbs to assess functional correlation.
Main Results:
- A modified HO classification using three radiographic views demonstrated better correlation with actual hip range of motion compared to the Brooker classification.
- Discrepancies between the two grading methods were observed in 16 cases.
- The modified method provided a more accurate assessment of HO's functional impact on hip mobility.
Conclusions:
- A modified radiographic classification system, incorporating multiple views, offers a more accurate assessment of heterotopic ossification after acetabular fracture surgery.
- This improved assessment correlates better with functional hip range of motion, aiding in clinical decision-making and patient management.
- Standard Brooker classification may underestimate the functional limitations imposed by HO in some cases.
Abstract:
A random sample of 100 patients who had operative treatment for a fracture of the acetabulum, an otherwise normal appearing hip joint, and at least one year of follow-up were analyzed to assess heterotopic ossification (HO) and its relationship to hip motion. The extent of HO was graded in a blinded fashion according to the Brooker classification, which relies solely on the anteroposterior (AP) view, as well as a modified classification using three radiographic views (AP pelvis, internal, and external Judet oblique views). For each patient, range of motion of the affected hip was compared with that of the contralateral normal limb. There were 16 cases with disagreement between the two methods. As opposed to the Brooker method, the modified classification provided an accurate correlation with the actual hip range of motion.