The Metatarsal Axis Deviation Angle: A Novel Angular Measurement for Planning Surgery of Severe Hallux Valgus

Surgical planning for hallux valgus is a complex procedure. Many angular measurements are described to decide on the correct procedure. Primus metatarsus varus is considered as one of the important factors in the causation and persistence of hallux valgus. Intermetatarsal angle (IMA) has been used to assess the first metatarsal varus. However, we identified a normal IMA in some feet with severe hallux valgus; and these feet had metatarsus adductus. Hence, after further investigations, we propose a new angular measurement to detect axis deviation of the first metatarsal. We have called this the metatarsal axis deviation angle (MADA). We also recommend a basal realignment osteotomy in hallux valgus with the MADA of more than 30°. How to cite this article Kantak AP. The Metatarsal Axis Deviation Angle: A Novel Angular Measurement for Planning Surgery of Severe Hallux Valgus. J Foot Ankle Surg (Asia-Pacific) 2017;4(2):97-99.