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Title: Short-term Clinical Outcome of Dual Plate Fixation in the Treatment of Proximal Humerus Fractures with Calcar Comminution.
Author: Liu J, Cui P, Wu X, Han L, Wang G, Dong J.
Journal: Orthop Surg; 2023 Aug; 15(8):1990-1996. PubMed ID: 36482829.
Abstract:
OBJECTIVE: Calcar comminution has been considered to be the main cause of the failure of internal fixation and fracture nonunion in proximal humerus surgery. Anatomical reduction and increasing the strength of internal fixation is the key to success. The purpose of this study was to investigate the short-term clinical effect of dual plate fixation in the treatment of proximal humeral fractures with calcar comminution. METHODS: The data of 37 patients with proximal humeral fractures with calcar comminution, treated in our departments from July 2018 to April 2020, were retrospectively analyzed. These patients were treated with anterior plate and lateral PHILOS plate, and followed up for more than 12 months, including 25 cases in Tianjin Hospital and 12 cases in Shanghai General Hospital. The patients included 12 males and 25 females, their age was 54.89 ± 13.59 years (range from 32-79 years), and 21 patients had dominant hand injury. According to the Neer classification, there were 11 two-part fractures, 22 three-part fractures, and four four-part fractures. The range of motion of the shoulder joint, visual analog scale (VAS), American Shoulder and Elbow Surgeons Shoulder Score (ASES), Constant-Murley shoulder score, neck-shaft angle, anterior-posterior angle, and other complication scores were recorded at the last follow-up. RESULTS: All 37 patients were followed up after operation, and the follow-up time was 21.81 ± 7.35 months (range from 12-36 months). The fractures of all 37 patients had healed at the last follow-up visit. The neck-shaft angle measured immediately after operation was 132.59° ± 8.34°, and the neck-shaft angle measured at the last follow-up visit was 132.38 ± 8.53°. The anterior-posterior angle measured immediately after surgery was 3.45° ± 0.81°, and the anterior-posterior angle at the last follow-up visit was 3.66° ± 0.77°. The range of motion of the shoulder joint was as follows: the shoulder joint could be forward elevated by 158.11° ± 13.09° (range: 140°-180°), rotated externally by 38.38° ± 7.55° (range: 20°-45°), and internally rotated to T4-L4 level. The VAS score was 0.46 ± 0.87 (range: 0-3), the ASES was 86.58 ± 8.79 (range: 56.7-100), and the Constant-Murley score was 88.76 ± 8.25 (range: 60-100). Thirty-three cases were excellent, and four cases were good. No obvious complications occurred. CONCLUSION: The combination of anterior plate and lateral PHILOS plate in the treatment of proximal humeral fractures with calcar comminution can achieve stable fixation, and the postoperative clinical and imaging outcome was satisfactory. Firstly, the anterior plate can provide temporary stability when the Kirschner wires are removed, which can provide space for lateral plate placement during fracture reduction and fixation. Secondly, additional support by the anterior plate can provide higher stability in complex fractures with calcar comminution.

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