title: Characterization of two small-particle composite resins.
abstract: The in vitro occlusal wear of two recently introduced, small-particle composite resins was evaluated. Twelve disks of each material were opposed by maxillary third molars and subjected to 300,000 masticatory cycles in a servohydraulic model of the human masticatory apparatus. Before and after profiles of the surfaces of both the disks and the teeth were mapped and digitally recorded on magnetic disks. P-50 disks showed significantly (P less than .05) less volume loss than did Herculite disks. Enamel that opposed P-50 disks showed significantly (P less than .001) more wear than did enamel that opposed Herculite disks.
authors.affiliation: Department of Oral Science, University of Minnesota, Minneapolis 55455.
authors.forename: M R
authors.initials: MR
authors.lastname: Pintado
mesh_terms: D003188:Composite Resins; D003799:Dental Stress Analysis; D006801:Humans; D008409:Mastication; D008963:Molar; D010316:Particle Size; D014072:Tooth Abrasion
chemical_list: D003188:Composite Resins