First ray mobility in hallux rigidus, hallux valgus, and normal feet based on weightbearing computed tomography and three-dimensional analysis: A case-control study.
Tadashi KimuraMakoto KubotaTakumi KiharaNaoki SuzukiAsaki HattoriMitsuru SaitoPublished in: Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association (2024)
Hypermobility of the first ray appears to be three-dimensional: in hallux valgus, it is centered at the first tarsometatarsal joint, while in hallux rigidus it is mainly in the sagittal plane at the first tarsometatarsal joint only. This difference may explain the different deformities ultimately observed in each condition.