Osteonecrosis After Femoral Neck Fractures in Children and Adolescents: Analysis of Risk Factors

Journal of Pediatric Orthopedics
David SpenceBenjamin J Shore

Abstract

The most serious complication of femoral neck fractures in children and adolescents is osteonecrosis. Although a number of factors have been implicated in the development of osteonecrosis, no specific cause-and-effect relationship has been determined. The primary purpose of this study was to determine the prevalence of osteonecrosis in children and adolescents after femoral neck fractures and to identify risk factors for its development. This retrospective review identified 70 patients between the ages of 1.3 and 18.1 years who were treated for a femoral neck fracture between 2000 and 2011 at a single level I pediatric trauma center and followed until clinical and radiographic union. Demographic information, injury event details, type of surgical treatment, associated injuries, time from injury to treatment, and postoperative alignment were recorded from chart and radiographic review. The primary outcome was the presence of osteonecrosis, which was determined by review of available imaging. Multivariable logistic regression analysis tested age, time to treatment, type of fixation, mechanism of injury, postoperative alignment, and capsular decompression as possible risk factors for the development of osteonecrosis. Osteonecrosis...Continue Reading

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