title: Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion.
abstract: The purpose of this study was to evaluate the gloss and surface roughness behaviors of newly developed CAD/CAM composite blocks with different filler contents and characteristics. The gloss and surface roughness were quantified before and after a toothbrush dentifrice abrasion test; the results were compared to the gloss and surface roughness of a ceramic CAD/CAM block. Knoop hardness was determined before abrasion test. The results were analyzed by ANOVA, Tukey HSD, and Dunnett t test (p<0.05). The rank order of Knoop hardness was as follows: Vita Mark II>Vita Enamic>Gradia block>Shofu Block HC, Lava Ultimate≥Katana Avencia block≥Cerasmart. After toothbrush abrasion, a significant difference in the gloss unit was detected between the Shofu Block HC material and the ceramic block. The Ra and Rz of the Cerasmart and Shofu Block HC materials were significantly larger than those of the ceramic block after toothbrush abrasion.
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry.
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Koizumi
authors.forename: Osamu
authors.initials: O
authors.lastname: Saiki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nogawa
authors.forename: Haruto
authors.initials: H
authors.lastname: Hiraba
authors.forename: Tomoyo
authors.initials: T
authors.lastname: Okazaki
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D017076:Computer-Aided Design; D003442:Crowns; D003764:Dental Materials / Q000737:chemistry; D019554:Dental Restoration Wear; D003802:Dentifrices; D006244:Hardness; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D014099:Toothbrushing
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D003802:Dentifrices