The plantar intermetatarsal ligaments connect the adjacent plantar surfaces of the metatarsal bases, maintaining the transverse forefoot arch at the metatarsal base level.
Maintain metatarsal base alignment, resist metatarsal divergence, preserve the proximal transverse forefoot arch, and provide the plantar counterpart to the deep transverse metatarsal ligament at the MTP joint level.
Disruption of the plantar intermetatarsal ligaments contributes to Lisfranc complex instability at the intermetatarsal level. Their preservation during Lisfranc reconstruction helps maintain the transverse midfoot arch.
Plantar intermetatarsal ligament tears contributing to complete Lisfranc complex instability, assessed on MRI and addressed in comprehensive ORIF or primary arthrodesis.
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