Hallux Valgus Deformity and Treatment: A Three-Dimensional Approach.

The cause and effect between hallux valgus and first ray hypermobility continues to be debated. Understanding the anatomic and radiographic examination of the first metatarsocuneiform (MTC) joint is critical to choosing an appropriate treatment algorithm for the surgical management of hallux valgus deformity. Some studies suggest hypermobility can be corrected without fusing the first MTC joint. Some think hypermobility arises secondarily from malalignment of the soft tissue constraints as the hallux valgus deformity progresses. Others think hypermobility is a primary cause of the hallux valgus deformity and have reported good results with surgical correction including a first tarsometatarsal arthrodesis.