Dual-Plate Fixation for Proximal Humerus Fractures With Unstable Medial Column in Patients With Osteoporosis.

Objectives: To compare radiological and clinical outcomes between lateral locking plate (LLP) and dual-plate fixation (LLP and additional medial buttress plate) for proximal humerus fractures with medial column comminution and varus deformity in patients with osteoporosis.

Design: Retrospective.

Setting: Academic medical center.

Patients/participants: Overall, 52 patients were enrolled. Of these, 26 patients underwent dual-plate fixation. The control group (LLP) was matched to the dual-plate group for age, sex, injured side, and fracture type.

Intervention: Patients in the dual-plate group were treated with LLP and medial buttress plate, whereas patients in the LLP group were treated with only an LLP.

Main Outcome Measurements: Demographic factors, operative time, and level of hemoglobin of the 2 groups obtained from medical records. Changes in the neck-shaft angle and the development of postoperative complications were recorded. Clinical outcomes were measured based on the visual analog scale; American Shoulder and Elbow Surgeons; Disabilities of the Arm, Shoulder, and Hand; and Constant-Murley scores.

Results: The operation time and hemoglobin loss did not differ significantly between the groups. Radiographic evaluation showed a significantly lower change in neck-shaft angle in the dual-=plate group than in the LLP group. The dual-plate group also showed better Disabilities of the Arm, Shoulder, and Hand; American Shoulder and Elbow Surgeons; and Constant-Murley scores than the LLP group.

Conclusion: Fixation using additional medial buttress plate with LLP may be considered for treating proximal humerus fractures in patients with an unstable medial column, varus deformity, and osteoporosis.

Level Of Evidence: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.