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Identification of humeral head bone defects. a Three-dimensional surface model of the right proximal humerus (involved side) is reconstructed from the obtained computed tomography data. b The mirrored surface data of the left proximal humerus (intact side) is matched to the right glenoid model using the anterior half of the proximal humerus. c The bone defect area (black) is identified with subtraction of the affected-side volume from the intact side
