title: Posterolateral rotatory instability of the elbow with insufficient coronoid process of the ulna: a report of 3 patients.
abstract: Congruity of the ulnohumeral joint, especially its anterior portion, is an important stabilizer of the elbow joint. We report on 3 patients in whom the insufficiency of the coronoid process, such as nonunion or a flattened trochlear notch, was associated with posterolateral rotatory instability of the elbow. In our opinion, addressing the anterior bony integrity of the ulnohumeral joint, in addition to the ligamentous stabilizer and mechanical axis, is essential to achieve stability in these circumstances. This issue is discussed with a review of the literature.
authors.affiliation: Department of Orthopedic Surgery, Keio University, School of Medicine, Tokyo, Japan. oka-masa@xb3.so-net.ne.jp
authors.forename: Masato
authors.initials: M
authors.lastname: Okazaki
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Takayama
authors.forename: Atsuhito
authors.initials: A
authors.lastname: Seki
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Ikegami
authors.forename: Toshiyasu
authors.initials: T
authors.lastname: Nakamura
mesh_terms: D000328:Adult; D001864:Bone Wires; D017885:Collateral Ligaments / Q000503:physiopathology / Q000601:surgery; D004551:Elbow Joint / Q000503:physiopathology / Q000601:surgery*; D005599:Fractures, Ununited / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D006811:Humerus / Q000637:transplantation; D007085:Ilium / Q000637:transplantation; D007593:Joint Instability / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D012399:Rotation; D016896:Treatment Outcome; D014457:Ulna / Q000503:physiopathology / Q000601:surgery*; D014458:Ulna Fractures / Q000503:physiopathology / Q000601:surgery