Radiographical results of Scarf osteotomy for hallux valgus related to distal metatarsal articular angle

Purpose of the study The hallux valgus surgery concerns many operative tech niques. The purpose of this report was to evaluate the radiographics result s of the Scarf osteotomy related to Distal Metatarsal Articular Angle (DMAA ). Material and Methods The Scarf osteotomy was performed on 79 feet with an h allux valgus deformity (75 females and 4 males from 16 to 82 years). Pre an d postoperative weight-bearing X-rays were performed; We measured the Dista l Metatarsal Articular Angle (DMAA), the intermetatarsal angle (M1-M2, M1-M 5), the metatarsophalangeal angle, the obliquity of the metatarso-cuneiform joint and the length of the first and second metatarsal. Results All parameters were statistically significantly improved by the sur gery. However correction on the DMAA was not sufficient (from 14.6 degrees to 12.6 degrees although normal value is 6 degrees). We found a correlation between the metatarsophalangeal angle and the DMAA. Discussion The preoperative mesures showed that the DMAA value increases wi th the value of the metatarsophalangeal angle; it is insufficiently decreas ed in comparison to the normal value. It has to be strongly taken in consid eration in the preoperative evaluation. Conclusion The preoperative DMAA value is the most important factor in the hallux valgus evaluation. It determines if Scarf or other operative techniq ue are indicated. Its normalisation may provide less recurrences.