Three-year follow-up of five posterior composites: in vivo wear.
The wear of five posterior composites at occlusal contact areas (OCA) and contact free occlusal areas (CFOA) was evaluated in Class II cavities over a 3-year period with an accurate 3D-measuring technique. A clinical evaluation was also performed. The ultrafine compact-filled composites (Willems et al., 1992) showed acceptable OCA-wear rates ranging from 110 to 149 microns after 3 years. This is very similar to the OCA-wear rate of human enamel on molars, which is about 122 microns after 3 years. The fine compact-filled composite had an unacceptable OCA-wear value of 242 microns after 3 years. The ultrafine midway-filled composite showed an exceptionally high CFOA-wear value of 151 microns after 3 years, which gave the impression of it being gradually washed out of the cavity. Clinically, 70% of the restorations made with the ultrafine midway-filled composite showed excellent colour match after 3 years. For most of the compact-filled composites slightly opaque fillings were noted and 63% of the restorations made with one of these materials were clearly opaque. It can be concluded that the investigated ultrafine compact-filled composites can be considered as amalgam alternatives as far as their wear resistance is concerned.
Willems
G
G
Department of Operative Dentistry and Dental Materials, Katholieke Universiteit te Leuven, Belgium.
Lambrechts
P
P
Braem
M
M
Vanherle
G
G
D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000379:methods; D004955:Esthetics, Dental; D005500:Follow-Up Studies; D006801:Humans; D008422:Materials Testing; D013499:Surface Properties; D013997:Time Factors
D003188:Composite Resins; C080724:Exp.LF composite; C074670:Marathon composite resin; C065771:P50 composite resin; C048711:P-30 composite resin; D017438:Bisphenol A-Glycidyl Methacrylate