An Assessment of Bleck's Classification Method for Metatarsus Adductus, and the Presentation of a New Classification on the Basis of Foot Scan

Introduction & Bleck classification is the common method of assessing Metatarsus Adductus (MA) which is associated with some limitations and problems. Foot scan is one of the new methods in the examination of lower extremities. The present study aimed to study the efficiency of a new method based on foot scan in determining the severity of MA and its compliance with Bleck classification. In this cross-sectional descriptive research، 100 subjects were equally divided into each of the four categories of Bleck classification. Their foot were scanned and the ratio of foot transverse distance on the fifth metatarsophalangeal joint (MTP) to the tangent to the outer edge of the foot (a)، and the foot width on the metatarsophalangeal joints (b) were measured from the images obtained. Then، these ratios were compared between the 4 groups by the One-way ANOVA analysis. The mean ratio of a/b in normal group 0. 02، with a standard deviation of 0. 02. This ratio in the mild metatarsus addactus was 0. 1، with standard deviation 0. 01; in the moderate metatarsus addactus was 0. 159 with standard deviation 0. 03 calculated، and the ratio in sever metatarsus addactus was 0. 216، with standard deviation 0. 025 was calculated. In addition، a significant difference was found between the groups (P)