Borderline Developmental Dysplasia of the Hip: A Risk Factor Predicting the Development and Poor Prognosis after Core Decompression for Idiopathic Osteonecrosis of the Femoral Head

• Published in: Orthopaedic surgery 2022-10, Vol.14 (10), p.2427-2435
• Main Authors: Huang, Kai, Zhang, Qing‐Yi, He, Hui‐Yu, Gao, Chen‐Xiang, Wang, Gang, Yang, Jing, Xie, Hui‐Qi, Zeng, Yi
• Format: Article
• Language: English
• Subjects: Body mass index; borderline al dysplasia of the hip; Clinical; core decompression; development; idiopathic osteonecrosis of the femoral head; Medical prognosis; prognosis; Radiography; Steroids; Survival analysis
• ISSN: 1757-7853; 1757-7861
• DOI: 10.1111/os.13442

Objective It is unclear whether idiopathic osteonecrosis of the femoral head (ONFH) is associated with borderline developmental dysplasia of the hip (BDDH). This study aimed to compare the incidence of BDDH between patients with idiopathic ONFH and matched control subjects and determine the influence of BDDH on poor prognosis after core decompression (CD). Methods We retrospectively examined 78 consecutive patients (111 hips) with idiopathic ONFH undergoing CD and 1:2 matched with 156 control subjects (222 hips). The anteroposterior pelvic radiographs were used to measure the acetabular anatomical parameters and divide included subjects into BDDH or non‐BDDH group. The incidence of BDDH and acetabular anatomical parameters were compared between patients with idiopathic ONFH and matched controls. Clinical outcomes, such as Harris Hip Score (HHS), progression of collapse, and conversion to total hip arthroplasty (THA), were compared between patients with BDDH and without BDDH in the idiopathic ONFH group, with a mean follow‐up of 72.1 ± 36.6 months. Results Patients with idiopathic ONFH had a significantly higher incidence of BDDH than matched controls (29.7% vs 12.2%, p