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Early to Midterm Clinical and Radiographic Survivorship of the All-Polyethylene Versus Modular Metal-Backed Tibia Component in Primary Total Knee Replacement.

07:00 EST 1st January 2019 | BioPortfolio

Summary of "Early to Midterm Clinical and Radiographic Survivorship of the All-Polyethylene Versus Modular Metal-Backed Tibia Component in Primary Total Knee Replacement."

The purpose of this study was to compare the all-polyethylene tibial component with the modular metal-backed component in primary total knee arthroplasty. A retrospective review of 1064 patients recorded clinical failure, as determined by need for revision surgery, range of motion, and impending radiographic loosening, as evaluated by the presence of radiolucent lines. Mean follow-up was 1.2 and 3 years, respectively. Survival in the all-polyethylene group was 100%, with 95.5% (95%
CI:
85.8-98.6) survival in the metal-backed component group at 4.3 years. Thin (<4 mm) radiolucent lines were present in one patient (0.7%) with an all-polyethylene implant and 24 (16.9%) patients with the metalbacked component (p < .001), while one (0.7%) and two (1.4%) patients had evidence of osteolysis, respectively (p = .621). While there were fewer radiolucent lines noted around the all-polyethylene implant on radiographs, the clinical implications of the finding are unknown. In this study population, the all-polyethylene tibial component appears appropriate. (Journal of Surgical Orthopaedic Advances 28(2):108-114, 2019).

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This article was published in the following journal.

Name: Journal of surgical orthopaedic advances
ISSN: 1548-825X
Pages: 108-114

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Medical and Biotech [MESH] Definitions

A vinyl polymer made from ethylene. It can be branched or linear. Branched or low-density polyethylene is tough and pliable but not to the same degree as linear polyethylene. Linear or high-density polyethylene has a greater hardness and tensile strength. Polyethylene is used in a variety of products, including implants and prostheses.

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