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Published on: September 7, 2022
Incidence and outcomes of intraoperative periprosthetic acetabular fractures during cementless total hip
You-Seung Chun1, Hwan-Hee Lee2, Young-Wook Lim3
1Department of Orthopaedic Surgery, College of Medicine, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Chunbo-Ro 271, Uijeongbu, Gyeonggi-Do, South Korea.
Purpose:
Unlike periprosthetic femoral fractures, periprosthetic acetabular fractures during total hip arthroplasty (THA) have not been evaluated in detail. We prospectively evaluated the incidence, patterns, risk factors, and clinical outcomes of intraoperative periprosthetic acetabular fractures using pre- and postoperative computer tomography (CT).
Methods:
In this prospective single-centre study, we evaluated 234 consecutive patients (250 hips) who underwent THA and three-dimensional CT before and after the surgery. We assessed the incidence, pattern of fractures, outcomes for each fracture pattern, reoperation and revision rates, Harris hip score, and visual analog scale (VAS) for pain. Multivariate regression models were used to identify risk factors for periprosthetic acetabular fractures.
Results:
In total, 43 periprosthetic acetabular fractures (17.2%) were identified via CT. Fractures occurred most frequently at the superolateral wall. Early cup migration occurred in three hips. None of the patients underwent revision surgery for acetabular loosening. Regression modeling showed that rheumatoid arthritis was a significant predictor of periprosthetic acetabular fractures.
Conclusions:
Periprosthetic acetabular fractures are not infrequent during cementless THA and are more common in patients with rheumatoid arthritis.
