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  11. Clinical Outcomes Of Fixed-bearing Total Knee Arthroplasty Using Non-cross-linked Vitamin E-enriched Polyethylene: A Retrospective Comparison With Conventional Polyethylene At Mean Nine-year Follow-up

Clinical Outcomes of Fixed-Bearing Total Knee Arthroplasty Using Non-Cross-Linked Vitamin E-Enriched Polyethylene: A Retrospective Comparison With Conventional Polyethylene at Mean Nine-Year Follow-Up

Tsuyoshi Hamada1, Shotaro Watanabe1, Nobuaki Hayashi1

  • 1Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan.

The Journal of Arthroplasty
|October 17, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Vitamin E-enriched polyethylene (VEPE) shows comparable long-term clinical performance to conventional polyethylene (CPE) in total knee arthroplasty (TKA). This study found similar implant survival and reoperation rates between VEPE and CPE, indicating comparable effectiveness.

Area of Science:

  • Biomaterials Science
  • Orthopedic Surgery
  • Polymer Engineering

Background:

  • Ultra-high molecular weight polyethylene (UHMWPE) is standard for total knee arthroplasty (TKA) inserts.
  • Polyethylene wear impacts TKA implant longevity.
  • Vitamin E-enriched polyethylene (VEPE) offers enhanced oxidative stability.

Purpose of the Study:

  • To compare the long-term clinical performance of non-cross-linked VEPE versus conventional polyethylene (CPE) in TKA.
  • To evaluate implant survival, reoperation rates, and patient outcomes.

Main Methods:

  • Retrospective cohort study of 488 patients (661 knees) undergoing primary TKA.
  • Patients divided into VEPE (169 knees) and CPE (492 knees) groups.
  • Clinical outcomes assessed at mean follow-up of approximately 10 years.
Keywords:
cementless fixationconventional polyethylenelong-term outcometotal knee arthroplasty

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Main Results:

  • Kaplan-Meier survival rates at 10, 15, and 20 years were similar for VEPE and CPE.
  • Reoperation rates (3.0% VEPE vs. 5.5% CPE) and wear-related revisions showed no significant difference.
  • No significant differences in range of motion or patient-reported outcomes between groups.

Conclusions:

  • Non-cross-linked VEPE demonstrates comparable clinical outcomes to CPE in TKA.
  • VEPE offers a viable alternative to conventional polyethylene for TKA inserts.
vitamin E–enriched polyethylene