【摘要】 目的探讨第一跖骨籽骨系统在?外翻发病机制中的作用。方法对245足正常足和141足?外翻足籽骨的绝对位置和相对位置以胫侧籽骨位置(tibialsesamoidposition,TSP)来表示进行测量,并与?外翻角(halluxvalgusangle,HVA)、跖间角(intermetatarsalangle,IMA)、跖趾关节半脱位进行统计学分析。结果正常足与?外翻足籽骨的绝对位置无差异,TSP与HVA、IMA呈明显的相关关系。245足正常足TSP的正常值范围为TSP≤3。92足?外翻足行手术治疗,其中19足行改良McBride手术,24足行跖骨头颈部截骨术,29足行跖骨基底截骨术,20足行Keller手术。因为Keller手术并不能矫正TSP,故共随访72足?外翻足,随访时间1～6年,平均4年。术后HVA为5°～10°,平均7°;IMA为5°～9°,平均7°;TSP均为3或4。根据孙俊英等提出的疗效评价标准,优60足83%,良8足11%,差4足6%,优良率为94%。结论TSP应该作为常规术后疗效评价及手术方式选择的重要依据。对于TSP位置异常者,应首选骨性手术,以恢复正常的跖骨籽骨系统。更多还原

【Abstract】 Objective To study the role of first metatarsal sesamoids s y stem in the pathogenesis of hallux valgus. Methods The sesamoids absolute and relative position (TSP) were measured in 245 normal feet and 141 hallux valgus ones, and the results were statistically analysed with hallux valgus angle(HVA), intermetatarsal angle(IMA) and metatarsal phalangeal joint subluxation. Results The absolute position of sesamoids had no difference in the normal feet and ha llux valgus ones. TSP was correlated with HVA,IMA. TSP≤3 was considered normal in 245 normal feet. 92 hallux valgus feet were surgically treated. 20 cases unde rgone Keller procedures which didnt correct TSP were excluded from this study. 19 cases treated with modified McBride procedures, 24 cases with metatarsal met aphyseal osteotomy, 29 cases with metatarsal basal osteotomy. All the cases were followed up for an average of 4 years(ranged 1－6 years). The postoperative HV A was 5°－10°(average 7°)，IMA was 5°－9°(average 7°)，TSP were all 3 or 4 . According to the evaluation standard made by SUN Junying et al, 60 cases(83％) were assessed as excellent， 8 cases(11％) as good， and 4 cases(6％) as worse ， giving an overall excellent and good rate of 94％. Conclusion TSP is an impo rtant parameter that should be routinely used for postoperative prognosis evalua tion and surgical procedures determination. Osteotomy is preferred to restore no rmal metatarsal-sesamoids system function when TSP is abnormal.更多还原