Heterotopic Ossification following acetabular fixation: Incidence and risk factors: 10-year experience of a tertiary centre

• Published in: Injury Vol. 47; no. 6; pp. 1332 - 1336
• Main Authors: Elhassan, Yahya, Abdelhag, Ady, Piggott, Robert P, Osman, Mugtaba, McElwain, John P, Leonard, Mike
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 01.06.2016
• Subjects: Acetabular fractures; Acetabulum - injuries; Acetabulum - surgery; Adolescent; Adult; Aged; Aged, 80 and over; Anti-Inflammatory Agents, Non-Steroidal - therapeutic use; Child; Diclofenac - therapeutic use; Female; Follow-Up Studies; Fracture Fixation, Internal - adverse effects; Fracture Fixation, Internal - methods; Fractures, Bone - diagnostic imaging; Fractures, Bone - pathology; Fractures, Bone - surgery; Heterotopic Ossification; Humans; Incidence; Indomethacin - therapeutic use; Ireland - epidemiology; Male; Middle Aged; National Referral Centre; Orthopedics; Ossification, Heterotopic - diagnosis; Ossification, Heterotopic - drug therapy; Ossification, Heterotopic - pathology; Postoperative Complications - diagnosis; Postoperative Complications - drug therapy; Postoperative Complications - pathology; Prognosis; Radiography; Retrospective Studies; Risk Factors; Treatment Outcome; Young Adult; Acetabular fractures; Heterotopic ossification; National Referral Centre; Heterotopic Ossification
• DOI: 10.1016/j.injury.2016.03.002
• ISSN: 0020-1383

Abstract Background Heterotopic ossification (HO) is a well-recognised complication following acetabular fracture fixation and its presence is prognostic for suboptimal clinical outcome. There are many controversies pertaining to its aetiology, including surgical approach, associated injuries and the use of HO prophylaxis. Long term data from high volume centres is necessary to address these issues. Aim To determine the incidence of HO post open reduction and internal fixation (ORIF) of acetabular fractures and to examine the associated risk and prognostic factors. Method We studied a cohort of 369 consecutive acetabular fractures that underwent ORIF at our institution over a 10 year period. Data was analysed using univariate and multivariate logistic regression. Results The existence of HO was evident in 65 patients (17.62%), of these 39 (60.0%) were Class I, 16 (24.6%) were Class II, 8 (12.3%) were Class III, and 2 (3.1%) were Class IV according to Brooker Classification. We found a significant association between admission to an Intensive Care Unit (ICU) (P-value = 0.039), chest injury (P-value = 0.013), multiple fractures (P-value =0.005), and the time lapse between injury and operation (P-value = 0.025), and some statistical significance with surgical approach, ipsilateral fractures, open fractures, tibial and patellar fractures. Age over 30 years as the only prognostic factor for severe HO. Prophylaxis with Indomethacin did not appear to confer any benefit in our patient group. Conclusion The risk factors for developing HO following acetabular fracture fixation are multifactorial and include admission to ICU, associated chest injuries, multiple fractures and delay between injury and surgery. Surgical approach, ipsilateral fractures and tibia and patellar fractures may also play a role. Age over thirty years was the only prognostic factor for developing severe HO.