Integrity of the first metatarsophalangeal joint: a biomechanical analysis.
Five fresh-frozen cadaver feet obtained from traumatic amputations were tested during hyperdorsiflexion stress of the first metatarsophalangeal joint. Three different types of injury were observed: (1) rupture of the capsule proximal to the sesamoids, (2) rupture of the plantar plate distal to the sesamoids, and (3) rupture of the capsular structures medially, allowing a lateral swing of the sesamoids around the metatarsal head. Incomplete dislocation can be associated with significant damage to the plantar plate and other soft tissues of the foot.
Prieskorn
D
D
Botsford General Hospital, Department of Orthopaedics, Farmington Hills, Michigan, USA.
Graves
S
S
Yen
M
M
Ray
J
J
Schultz
R
R
D000328:Adult; D001696:Biomechanical Phenomena; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D008683:Metatarsophalangeal Joint / Q000033:anatomy & histology / Q000502:physiology; D008875:Middle Aged