Sarrafian S K
Foot Ankle. 1985 May-Jun;5(6):322-6. doi: 10.1177/107110078500500603.
Metatarsus primus varus may be an important pathologic component in hallux valgus deformity. The correction of the pathologic intermetatarsal angle M1 M2 is essential for providing an acceptable alignment of the hallux. The distal lateral displacement osteotomy of the first metatarsal (Chevron or Mitchell) provides correction of the intermetatarsal angle M1 M2. The present paper describes a simple method of calculating preoperatively the maximum possible correction through such osteotomies. This method, based on the measurement of the length of the first metatarsal and the width at the osteotomy site, projects the amount of correction and, furthermore, provides the limits of angular correction through such osteotomies performed distally.
第一跖骨内翻可能是拇外翻畸形的一个重要病理组成部分。矫正病理性的第一、二跖骨间角（M1 M2）对于使拇趾获得可接受的对线至关重要。第一跖骨远端外侧移位截骨术（Chevron或Mitchell截骨术）可矫正第一、二跖骨间角（M1 M2）。本文描述了一种术前通过此类截骨术计算最大可能矫正量的简单方法。该方法基于第一跖骨长度及截骨部位宽度的测量来推算矫正量，此外，还能得出通过此类远端截骨术进行角度矫正的限度。
