Optical analysis of surface changes on early retrievals of highly cross-linked and conventional polyethylene tibial inserts

Orhun K. Muratoglu*, Jeff Ruberti, Suzi Melotti, Stephen H. Spiegelberg, Evan S. Greenbaum, William H. Harris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

Retrieved tibial liners of highly cross-linked and conventional polyethylene were examined for articular and backside surface damage. Surfaces were graded for pitting, machine-mark loss, scratching, abrasion, delamination, and embedded debris. Whereas no difference existed in the damage score for the 2 groups, the highly crosslinked group showed significantly less elimination of machine marks. Wear, surface plastic deformation, or a combination, could account for the damage on these components. Only 1 of the highly crosslinked polyethylene inserts was available for destructive testing. That insert was melted to activate the shape memory, and thus differentiate, between wear versus plastic deformation. Nearly all changes on the articular and backside surfaces disappeared upon melting, and original machining marks reappeared, suggesting that the surface changes for that component were primarily the result of plastic deformation and not material removal.

Original languageEnglish (US)
Pages (from-to)42-47
Number of pages6
JournalJournal of Arthroplasty
Volume18
Issue number7 SUPPL. 1
DOIs
StatePublished - Jan 1 2003

Keywords

  • Cross-linked polyethylene
  • Explant analysis
  • Polyethylene
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Fingerprint Dive into the research topics of 'Optical analysis of surface changes on early retrievals of highly cross-linked and conventional polyethylene tibial inserts'. Together they form a unique fingerprint.

Cite this