title: Destruction of acetabular bone caused by early failure of a constrained acetabular component.
abstract: Use of a constrained acetabular component is 1 option for the treatment of dislocation after total hip arthroplasty. We report a case of a constrained acetabular component that resulted in postoperative early fixation loss and required revision 12 days after primary surgery. The superoposterior wall of the acetabulum was destroyed by the migrated acetabular component. Sharp ends of screws with a metal shell may have plowed up acetabular bone gradually after fixation loss of the component. This failure illustrates the potential risk of using a constrained acetabular component for total hip arthroplasty.
authors.affiliation: Department of Orthopaedic Surgery, Hokkaido University, School of Medicine, Sapporo, Japan. itobiro@med.hokudai.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Ito
authors.forename: A
authors.initials: A
authors.lastname: Minami
authors.forename: E
authors.initials: E
authors.lastname: Kondo
authors.forename: M
authors.initials: M
authors.lastname: Fujita
authors.forename: Y
authors.initials: Y
authors.lastname: Ubayama
authors.forename: T
authors.initials: T
authors.lastname: Matsuno
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000473:pathology*; D019644:Arthroplasty, Replacement, Hip / Q000379:methods; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation