AB123. SOH26AB_0334. Development and reliability of a semi-automated 3D volumetric analysis in proximal humerus fractures using open-source software

Non-union is an uncommon but clinically significant complication of proximal humerus fractures (PHFs). Two-dimensional (2D) parameters such as head-shaft angle and translation have been identified as strong predictors of non-union; however, the clinical value of three-dimensional (3D) measures such as fragment volume remains underexplored. Moreover, segmentation methods for 3D fragment reconstruction are variable. This study aims to assess the feasibility of a semi-automated segmentation technique, using 3D-imaging software, for volumetric analysis of the articular fragment in PHFs and its effect on fracture healing.