Objective: To investigate the clinical efficacy of Hintermann osteotomy (H-LCL) for flexible flatfoot. Methods: A follow-up study. Clinical data of 30 patients with flexible flatfoot treated with H-LCL operation from January 2020 to December 2021 in Sports Medical Center of the First Affiliated Hospital of Army Medical University were retrospectively analyzed. There were 8 males and 22 females, with a mean age of (39.0±15.2) years. The mean time from symptom onset to the diagnosis［M（Q1，Q3）］was 24.0 (5.5, 102.0) months. The functional and imaging scores of the patients before and after the last follow-up were compared to evaluate the clinical efficacy of the operation. The functional scores included American Orthopedic Foot and Ankle Society (AOFAS) score, visual analogue scale (VAS) of pain, pain interference (PI) and physical function (PF) index in Patient-Reported Outcomes Measurement Information System (PROMIS). And the imaging scores included Meary's angle, calcaneal pitch angle, calcaneal valgus angle and talonavicular coverage angle. Results: The mean operation time was (82.3±24.4) min, and the follow-up periods was (17.9±6.9) months. At the last follow-up, VAS of pain [M(Q1, Q3)] decreased from 5 (4, 6) to 2 (1, 2); PI decreased from 59.8±5.0 to 44.6±5.7; AOFAS increased from 65.2±10.0 to 85.8±3.3; PF increased from 50 (48.5,51.0) to 58.5 (54.0, 66.0); Meary's angle (antero-posterior image) decreased from 15.7° (10.1°, 29.2°) to 3.9° (2.6°, 5.3°); Meary's angle (lateral image) decreased from 13.5°±6.8° to 4.4°±2.6°; calcaneal pitch angle increased from 14.0°±3.3° to 18.6°±4.2°; calcaneal valgus angle decreased from 12.6°±7.3° to 4.3°±2.5°; and talonavicular coverage angle decreased from 20.9°±10.7° to 7.7°±5.2°. The up-mentioned parameters were all improved statistically significant at the last follow-up when compared with those before the operation (all P<0.05). Conclusion: H-LCL brings a significant improvement of clinical outcome scores and good radiological correction of flatfoot deformities in correcting flexible flatfoot, it conforms to the anatomical characteristics of the subtalar joint.
目的： 观察Hintermann截骨术（H-LCL）对柔韧性平足症的临床疗效。 方法： 随访研究。回顾性分析2020年1月至2021年12月在陆军军医大学第一附属医院接受H-LCL治疗的30例柔韧性平足症患者的临床资料。其中男8例，女22例，年龄（39.0±15.2）岁，症状出现时间［M（Q1，Q3）］为24.0（5.5，102.0）个月。对比患者术前、术后末次随访时的功能性和影像学评分，功能性评分为疼痛视觉模拟评分（VAS）、美国足踝矫形协会（AOFAS）评分、患者报告结果测量信息系统（PROMIS）评分中疼痛影响评分（PI）与物理功能评分（PF）；影像学评价为足正侧位的Meary角、距舟关节覆盖角、Pitch角及后足力线位中的跟骨外翻角。 结果： 手术时间为（82.3±24.4）min，随访时间为（17.9±6.9）个月。术前和术后末次随访时的功能评分和影像学表现对比结果显示，疼痛VAS评分［M（Q1，Q3）］由5（4，6）分降至2（1，2）分，PI由（59.8±5.0）分降至（44.6±5.7）分，AOFAS由（65.2±10.0）分升至（85.8±3.3）分，PF由50.0（48.5，51.0）分升至58.5（54.0，66.0）分、足正位Meary角由术前的15.7°（10.1°，29.2°）降至3.9°（2.6°，5.3°），足侧位Meary角由13.5°±6.8°降至4.4°±2.6°，足侧位Pitch角由14.0°±3.3°升至18.6°±4.2°，跟骨外翻角由12.6°±7.3°降至4.3°±2.5°，足正位距舟关节覆盖角由20.9°±10.7°降至7.7°±5.2°，差异均有统计学意义（均P<0.05）。 结论： H-LCL治疗柔软性平足症的纠正能力强，手术便捷，临床疗效好，符合距下关节解剖学特点。.