In vitro investigation of the wear of resin composite materials and cast direct retainers during removable partial denture placement and removal.
The purpose of this study was to determine whether wear of two resin composite materials and contacting I-bar clasp tips would occur within a simulated RPD placement and removal period of 2 years. The data were compared to enamel with contacting I-bars. Cast I-bar clasps were passed over each specimen in the resin composite and tooth experimental groups (n = 10). Computer digitized image analysis of SEM photomicrographs of the specimens provided data for analysis of wear. Results indicated a statistical difference in the amount of mean wear between the two resin composites and between the I-bar groups. The results from this study suggest that the selection of a resin composite for use as a RPD retentive undercut must be carefully undertaken to avoid excessive wear and loss of retention.
Tietge
J D
JD
University of Iowa.
Dixon
D L
DL
Breeding
L C
LC
Leary
J M
JM
Aquilino
S A
SA
D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D003722:Dental Alloys; D016734:Dental Clasps; D003799:Dental Stress Analysis; D003781:Denture Retention; D003832:Denture, Partial, Removable; D007091:Image Processing, Computer-Assisted; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D014520:Urethane
D003188:Composite Resins; D003722:Dental Alloys; C056413:Occlusin; C065771:P50 composite resin; D014520:Urethane; D017438:Bisphenol A-Glycidyl Methacrylate