title: Rotatory motion of a cemented acetabular component caused by aseptic loosening and dissociation of the polyethylene liner: a case report.
abstract: A 63-year-old woman without rheumatoid arthritis who had undergone cemented total hip arthroplasty developed coxalgia 1 year later. Radiography showed a clear zone at the cement-implant interface and rotatory motion of the acetabular component, so revision surgery was performed 4.5 years after the first operation. Aseptic loosening was noted and 7 spacers outside the acetabular component were broken and buried under the cement mantle. We consider that the rotatory motion may be caused by circumferential loosening of the acetabular component stemming from incomplete implant fixation and also dissociation of the ultra-high-molecular weight polyethylene (UHMWPE) liner from the metal base plate.
authors.affiliation: Department of Orthopaedic Surgery, Kurashiki Central Hospital, Okayama, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ido
authors.forename: K
authors.initials: K
authors.lastname: Kondo
authors.forename: Y
authors.initials: Y
authors.lastname: Asada
authors.forename: T
authors.initials: T
authors.lastname: Sakamoto
authors.forename: T
authors.initials: T
authors.lastname: Morita
authors.forename: R
authors.initials: R
authors.lastname: Hayashi
authors.forename: S
authors.initials: S
authors.lastname: Kuriyama
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging; D001843:Bone Cements / Q000009:adverse effects*; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008875:Middle Aged; D008970:Molecular Weight; D019904:Polymethyl Methacrylate / Q000009:adverse effects*; D011126:Polypropylenes / Q000009:adverse effects*; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D012399:Rotation
chemical_list: D001843:Bone Cements; D011126:Polypropylenes; D019904:Polymethyl Methacrylate