The first MTP joint capsule provides complete joint containment and is divided and repaired strategically in hallux valgus correction. The lateral capsule release and medial capsule-periosteum imbrication are key steps in the Chevron, Scarf, and Lapidus osteotomy procedures for hallux valgus correction. The plantar plate and sesamoid complex are integral components of the capsular complex.
| Origin | First metatarsal neck (dorsal, medial, lateral, and plantar) |
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| Insertion | Proximal phalangeal base of the great toe — capsule reinforced by the collateral ligaments and plantar plate |
| Actions | Great toe MTP joint containment; the medial capsule is reinforced in hallux valgus correction surgery |
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Hallux valgus correction requires careful lateral capsular release (to allow medial correction of the metatarsal head) combined with medial capsular advancement (to provide medial soft tissue tension). Overcorrection producing hallux varus from excessive lateral release or overtight medial imbrication is a recognised complication requiring corrective procedures.
First MTP capsule lateral release and medial imbrication combined with metatarsal osteotomy corrects hallux valgus deformity.
