The lateral sesamoid ligament connects the fibular (lateral) sesamoid to the lateral proximal phalanx base and lateral MTP capsule.
Provides the primary lateral constraint for the fibular sesamoid, maintaining its position during push-off and MTP movement.
Lateral sesamoid avascular necrosis can follow lateral MTP capsular release in hallux valgus surgery if the sesamoid blood supply is disrupted alongside the lateral ligament.
Lateral sesamoid ligament and capsule disruption during lateral release damaging the sesamoid blood supply and producing avascular necrosis.
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