Journal Article Rotator cuff repair Avascular necrosis Bone filler Bone graft CT imaging Fracture augmentation Humeral shaft fractures Inter-rater agreement Intraoperative assessment MR imaging Multivariable model Muscle atrophy Nonunion Occupation ratio Open reduction and internal fixation PENN shoulder score PROMs Preoperative factors Proximal humerus fracture Shoulder Surgeon performance Tear characteristics Warner classification arm position complications functional bracing glenohumeral position longitudinal imaging measurement variability