title: The effect of hallux abducto valgus surgery on the sesamoid apparatus position.
abstract: A new parameter, the tibial sesamoid-second metatarsal distance, was established to determine whether the sesamoids move in relation to the foot in hallux abducto valgus surgery. The reliability of the tibial sesamoid-second metatarsal distance was assessed and shown to be excellent. Seventy-five feet underwent surgical correction of hallux abducto valgus. Four radiographic parameters--the intermetatarsal angle, the hallux abductus angle, the tibial sesamoid position, and the tibial sesamoid-second metatarsal distance--were measured before and after surgery. The hallux abductus angle, intermetatarsal angle, and tibial sesamoid position were all significantly reduced following surgery. The tibial sesamoid-second metatarsal distance was not affected by hallux abducto valgus correction. Thus the correction in sesamoid position gained with hallux abducto valgus correction is a direct result of lateral translocation of the metatarsal head, with no contribution from change in position of the sesamoid apparatus relative to the foot.
authors.affiliation: Department of Surgery, PHS Mt Sinai Medical Center, Cleveland, OH, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Judge
authors.forename: S
authors.initials: S
authors.lastname: LaPointe
authors.forename: G V
authors.initials: GV
authors.lastname: Yu
authors.forename: J E
authors.initials: JE
authors.lastname: Shook
authors.forename: R P
authors.initials: RP
authors.lastname: Taylor
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001696:Biomechanical Phenomena; D005260:Female; D006215:Hallux Valgus / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D015203:Reproducibility of Results; D012716:Sesamoid Bones / Q000033:anatomy & histology* / Q000000981:diagnostic imaging