3-matic软件测量负重状态平足指标的可行性分析

目的:比较3-matic软件与传统X线平片对平足指标测量结果是否具有一致性。方法:在3-matic软件中,根据重建的足踝部负重状态三维骨骼模型,获取足踝部负重状态下的正位、侧位及后足冠状位图像,然后进行平足相关指标的测量,并与同一个体、同一指标的普通平片测量结果进行对比。结果:两种方法对于跟骨倾斜角、距舟覆盖角、正位距骨第一跖骨角的测量,两种测量方法没有统计学差异(P>0.05)。对于侧位距骨第一跖骨角、距骨倾斜角、跟骨外移距离、内侧柱长度、内侧足弓角、外侧柱长度、外侧足弓角和跟骨外翻角的测量,两种测量方法具有显著统计学差异(P<0.05)。结论:在3-matic软件中进行平足相关指标的测量具有直观清楚、非侵袭性、测量结果稳定等优点,测量时可以根据需要去除不相关的骨块,消除骨骼重影的干扰。对于平足各指标的测量,3-matic软件测量与平片测量结果不具有一致性,因此,利用数字化技术进行平足模拟手术时,不能直接参考平片测量的正常范围。     

Effect of different Scarf osteotomy angles on orthopedic surgery for flat foot北大核心

BACKGROUND: Scarf osteotomy is an effective procedure for correcting the valgus of the flat foot, which is a three-dimensional orthopedic procedure. Whether the angle of the osteotomy will affect the orthopedic strength needs to be studied. OBJECTIVE: To simulate Scarf osteotomy at different angles in 3-matic software, and to analyze the effect of Scarf osteotomy angle on flat foot orthopedics. METHODS: Three-dimensional models of the flat foot on weight-bearing state were imported into 3-matic software to obtain the sketches of the frontal lateral and coronal rear foot. The relevant indexes of flat feet were measured as the flat feet indexes before operation. In the same model, the traditional Evans combined with medial displacement calcaneal osteotomy, as well as different angles of Scarf osteotomy, such as 45°, 60°, 75°, 90°, 105°, 120° were performed. After the osteotomy was completed, the flat foot-related indicators were measured again, and compared with those before the operation. RESULTS AND CONCLUSION: Simple bone surgery had little effect on the talus pitch angle and the talo-first metatarsal angle on lateral side. Evans operation had greater correction of fore foot abduction, while Scarf osteotomy had no significant effect on it. For the effect on the hind foot valgus, Scarf osteotomy showed greater effects than the traditional Evans combined with medial displacement calcaneal osteotomy. The contact area of the osteotomy was larger than that of the traditional one, and decreased gradually with the increase of the angle of Scarf osteotomy. In addition, this study found that perpendicular to the lateral wall of the opposite bone after osteotomy, along the perpendicular to the lateral wall of the external bone can play a part in the role of deepening the arch. © 2023, Publishing House of Chinese Journal of Tissue Engineering Research. All rights reserved.     

微创锁扣阻挡改良Krackow技术治疗跟腱断裂的疗效

目的探讨微创锁扣阻挡改良Krackow和开放giftbox缝合治疗跟腱断裂的临床效果。方法回顾性分析2016年1月至2018年12月收治的跟腱断裂患者56例, 男54例、女2例, 年龄(40.7±9.4)岁(范围26～65岁)。30例微创组采用不暴露断端的两个微创切口行锁扣阻挡改良Krackow缝合, 26例开放组采用后方纵行切口行giftbox缝合, 两组均加环绕缝合线, 构成6股缝合线修复跟腱。术后均采用早期康复方案, 于术后6周, 3、6、12、24个月随访记录跟腱休息角(Achilles tendon resting angle, ATRA)并计算相对ATRA(健侧与患侧的差值)、美国足踝外科协会(American Orthopaedic Foot and Ankle Society, AOFAS)踝与后足功能评分、跟腱完全断裂评分(Achilles tendon total rupture score, ATRS), 并于术后6周和3个月在矢状面MRI上测量断端间隙, 横断面测量跟腱断端横截面积。结果微创组与开放组年龄、体质指数、伤后至手术时间、跟腱断裂部位的差异均无统计学意...