title: The incidence of revision of the metal component of total knee arthroplasties in different tibial-insert designs.
abstract: Seventy-one revisions of knee arthroplasty due to wear of modular tibial polyethylene inserts undertaken from May 1990 to May 1999 were reviewed. In 38 cases (53.5%), severe damage was noted that necessitated replacement of the metal components. This proportion was less than in a previous study (88.7%). All the cases were further divided into two groups based on the design of the tibial component, one group having mobile bearings and the other fixed. In only 17.7% of the mobile group was there a need to replace metal parts at revision, whereas 83.8% of the fixed group required such replacement, which is much more comparable to the previous study. Therefore, the incidence of revision of the metallic component of a total knee arthroplasty depends greatly on the design of the tibial components.
authors.affiliation: Department of Orthopaedic Surgery, Mackay Memorial Hospital, Taipei, Taiwan, ROC.
authors.forename: Chun-Hsiung
authors.initials: CH
authors.lastname: Huang
authors.forename: Jiann-Jong
authors.initials: JJ
authors.lastname: Liau
authors.forename: Chen-Yu
authors.initials: CY
authors.lastname: Lung
authors.forename: Chih-Tang
authors.initials: CT
authors.lastname: Lan
authors.forename: Cheng-Kung
authors.initials: CK
authors.lastname: Cheng
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008670:Metals; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D013314:Stress, Mechanical; D013977:Tibia / Q000473:pathology / Q000601:surgery*; D016474:Weight-Bearing
chemical_list: D008670:Metals; D020959:Polyethylene