Abstract
Intro: There are few modern reports which document the results of all-polyethylene tibial components in younger, more active patients. The potential benefits of this design are the elimination of backside wear and lower implant cost than modular, metal-backed components.
From January 1992 to the present, 56 TKRs were implanted in 41 patients less than 60 years of age at the time of index surgery using a cemented all-poly tibial component with a PS design. Indications included all patients with osteoarthritis or post-traumatic arthritis without significant tibial bone loss. All patientswere followed prospectively with clinical and radiographic criteria asdefined by the Knee Society. Patient Assessment Questionnaires were used to quantify patient satisfaction, pain, and activity levels.
From January 1992 to the present, 56 TKRs were implanted in 41 patients less than 60 years of age at the time of index surgery using a cemented all-poly tibial component with a PS design. Indications included all patients with osteoarthritis or post-traumatic arthritis without significant tibial bone loss. All patientswere followed prospectively with clinical and radiographic criteria asdefined by the Knee Society. Patient Assessment Questionnaires were used to quantify patient satisfaction, pain, and activity levels.
Discussion: Since the mid 1980s, modular, metal-backed tibial trays have dominated the TKR market based on finite-element analysis studies which demonstrated superior force distribution compared to conventional all-poly components. As a result, backside wear has become an emerging problem and refocused design efforts on unitized components. Our clinical experience indicates an all-poly tibial component fixed with cement provides excellent performance and survivorship even in younger, more active patients.
Correspondence should be addressed to Richard Komistek, PhD, International Society for Technology in Arthroplasty, PO Box 6564, Auburn, CA 95604, USA. E-mail: ista@pacbell.net
