title: Matched-pair analysis of all-polyethylene versus metal-backed tibial components.
abstract: Forty-eight matched pairs of osteoarthritic knees from patients who underwent primary total knee arthroplasty with a round-on-round, Apollo Knee System were studied to evaluate the outcome between all-polyethylene and metal-backed tibial components. Patients were matched for patient factors, preoperative deformities, cruciate salvage or sacrifice, and surgical technique. At the last follow-up (average, 38.4 months), there was no statistically significant difference in terms of knee scores, patient self-assessment, and radiographic outcomes. No component required revision, and no revisions were pending. Maintenance of these results over time would project into better long-term success for all-polyethylene tibial components because of the amount of wear and osteolysis with current modular metal-backed tibial components. We advocate the use of a more cost-effective all-polyethylene tibial component in elderly patients (>70 years old) who are not likely to need the versatility of exchange of a modular polyethylene insert because of wear.
authors.affiliation: The Bone and Joint Institute at Good Samaritan Hospital, Los Angeles, California, USA.
authors.forename: P
authors.initials: P
authors.lastname: Udomkiat
authors.forename: L D
authors.initials: LD
authors.lastname: Dorr
authors.forename: W
authors.initials: W
authors.lastname: Long
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D019544:Equipment Failure Analysis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D016555:Matched-Pair Analysis; D008670:Metals; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D020959:Polyethylene; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011474:Prosthesis Design; D011859:Radiography
chemical_list: D008670:Metals; D020959:Polyethylene