Biodynamics of hallux abductovalgus etiology and preoperative evaluation.

Hallux abductovalgus (HAV) is a common but complex deformity. HAV is a combination of deformities and abnormalities. Because HAV is not from a single cause or pathologic process, controversies in description and potential treatments exist. Although many HAV deformities appear similar, no two are the same and thus cannot be treated the same surgically.