Abstract
ObjectiveThe purpose of this study was retrospectively to analyze the risk factors for non-union in Anderson–D’Alonzo type III odontoid fractures with conservative treatment. Methods25 patients with type III fractures were analyzed. Coronal and sagittal tilt as well as sagittal and lateral mass gaps were measured by using computed tomography. ResultsThe non-union group had significantly higher age, greater coronal tilt and lateral mass gap. Especially, the lateral mass gap was >2 mm in all cases with non-union. ConclusionsHigher age, coronal tilt, and lateral mass gap were significant risk factors for non-union.
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