MTP joint dislocation is a dislocation of the proximal phalanx from the articulation with the metatarsal head.
This injury is the result of a dorsiflexing force. The sling that connects the joint’s dorsal hood with the plantar plate ruptures, allowing the proximal phalanx to dislocate dorsally.
Or, the plantar plate can fail in its plantar attachment, resulting in the proximal phalanx dislocating dorsally.
AP and lateral oblique views are sufficient for diagnosis and treatment.
Lateral view of the same case