title: Early catastrophic failure of rotating hinge total knee prosthesis.
abstract: The mechanical failure of a prosthesis component is usually observed as a late complication of total knee arthroplasty (TKA). In knees with severe ligament instability and bone deficiency, either a true hinge prosthesis or a rotating hinge implant is commonly used. Failure of the polyethylene bearing bush in a hinge-type prosthesis is a complication that has not been reported to date. We report the cases of 2 rotating hinge TKA prostheses that dislocated as a result of mechanical failure of the prosthetic component within 5 months of initial implantation. Clinicians should be aware of this potential complication when selecting rotating hinge prostheses for certain patients.
authors.affiliation: Department of Orthopedic Surgery, Chang Gung Memorial Hospital at Kaohsiung, Taiwan.
authors.forename: C J
authors.initials: CJ
authors.lastname: Wang
authors.forename: H E
authors.initials: HE
authors.lastname: Wang
mesh_terms: D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography