title: Temporomandibular Joint Arthroplasty Using Metal-on-Metal and Acrylic-on-Metal Configurations : Wear In Laboratory Tests and In Retrievals.
abstract: In the long-term performance ofthe temporomaridibular joint (TMJ) implant, wear must be considered. Thus retrieved and laboratory test implants were examined both optically and in a scanning electron microscope (SEM). In laboratory testing, the volumetric wear of metal-on-metal was about an order of magnitude less than that of acrylic-on-metal TMJ implants. This metal-on-metal wear was also about half of that reported in the literature for a laboratory test of polyethylene-on-metal TMJ implants, The retrieved TMJ implants showed some abrasive wear occurred during multi-directional articulation with smaller wear zones for the metal-on-metal compared to the acrylic-on-metal configuration. Further efforts to characterize and minimize wear were recommended as prudent in the continuing development of TMJ arthroplasty.
authors.affiliation: Engineering Consulting Services Inc Prior Lake.
authors.forename: A L
authors.initials: AL
authors.lastname: Lippincott III
authors.forename: J M
authors.initials: JM
authors.lastname: Dowling
authors.forename: D
authors.initials: D
authors.lastname: Phil
authors.forename: J B
authors.initials: JB
authors.lastname: Medley
authors.forename: R W
authors.initials: RW
authors.lastname: Christensen