Can predictive and functional methods locate the dysplastic hip joint center?
Year: 2025
Type: article
Abstract: Accurately locating the hip joint center (HJC) is essential for quantifying joint loads and understanding hip mechanics, especially in patients with known hip abnormalities like development dysplasia of the hip (DDH). The purpose of this study was to compare common Functional and Predictive HJC estimates to Anatomic HJCs in patients with DDH and controls. We hypothesized that Functional HJCs would be nearer than Predictive HJCs to Anatomic HJCs. We recruited 40 female subjects (20 with DDH and 20 controls) and calculated subject-specific Anatomic HJCs using three-dimensional femur and pelvis reconstructions from magnetic resonance images. Using reflective skin markers and Visual3D software, we calculated two Functional and four Predictive HJCs for each hip of each subject. From mixed-effects linear regression we determined which HJC method was most accurate and had the least directional bias, based on resultant, mediolateral, anteroposterior, and superoinferior distances from the Anatomic HJCs. Contrary to our hypothesis, the Predictive methods by Harrington et al were the most accurate and had the smallest directional bias for patients with DDH. On average, the Harrington (pelvis-only) method was also most accurate for controls in the sample, but the distinction from other methods was not as clear as that found in the DDH group. These findings suggest that in the absence of imaging data the Harrington (pelvis-only) method is the most accurate HJC estimation approach when assessing the biomechanics of dysplastic hips.
Source: Gait & Posture
Language: English
Topic: Hip disorders and treatments
Subfield: Surgery
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $3,510
Awards: G2117959961, G861939244
OpenAlex ID: W4414446880