摘要目的:探讨应用微型钩板治疗陈旧性骨性锤状指的临床疗效。方法:回顾性分析我科自2021年5月至2024年5月收治的陈旧性骨性锤状指患者18例，治疗方案均采用切开复位微型钩板固定，术后支具固定4～6周。结果:术后18例患者均获得随访，时间6～33个月，平均18个月。末次随访时根据Crawford功能评定标准评定伤指功能：优10例，良4例，中3例，差1例。术前测得患指远指间(distal interphalangeal joint，DIP)关节欠伸角度平均值为22°(5°～50°)，术后DIP关节欠伸角度改善为平均值3.5°(0°～15°)，DIP关节主动屈曲活动度平均值为55°(30°～80°)，有4例患者术后出现屈曲受限。所有患者均未发生切口感染、皮肤坏死等并发症。有1例患者出现甲板畸形，术后3个月骨折愈合内固定取出后甲板外观恢复。结论:微型钩板治疗陈旧性骨性锤状指临床疗效显著，并发症少，值得临床推广。

abstractsObjective:To investigate the clinical efficacy of microhook plates for the treatment of old bony mallet fingers.Methods:A retrospective analysis was conducted on 18 patients with old bony mallet fingers admitted to our department from May 2021 to May 2024. The treatment plan was open reduction and microhook plate fixation, and postoperative braces were fixed for 4 to 6 weeks.Results:All 18 patients were follow-up after surgery for a period of 6 to 33 months, with an average of 18 months. At the last follow-up, according to the Crawford functional evaluation criteria, the finger injury function was assessed as excellent in 10 cases, good in 4 cases, fair in 3 cases, and poor in 1 case. The average degree of extension of the distal interphalangeal (DIP) joint in the affected finger was measured to be 22° (5° to 50°) before surgery. After surgery, the degree of extension of the DIP joint improved to an average of 3.5° (0° to 15°), and the average degree of active flexion of the DIP joint was 55° (30° to 80°). Four patients experienced flexion restriction after surgery. All patients did not experience complications such as incision infection or skin necrosis. One patient developed deck deformity, and after 3 months of fracture healing and internal fixation removal, the appearance of the deck was restored.Conclusion:Microhook plate therapy has significant clinical efficacy in treating old bony mallet fingers, with few complications, and is worthy of clinical promotion.