title: SiO2-nanocomposite film coating of CAD/CAM composite resin blocks improves surface hardness and reduces susceptibility to bacterial adhesion.
abstract: Composite resin blocks for computer-aided design/computer-aided manufacturing (CAD/CAM) applications have recently become available. However, CAD/CAM composite resins have lower wear resistance and accumulate more plaque than CAD/CAM ceramic materials. We assessed the effects of SiO2-nanocomposite film coating of four types of CAD/CAM composite resin blocks: Cerasmart, Katana Avencia block, Lava Ultimate, and Block HC on surface hardness and bacterial attachment. All composite blocks with coating demonstrated significantly greater Vickers hardness, reduced surface roughness, and greater hydrophobicity than those without coating. Adhesion of Streptococcus mutans to the coated specimens was significantly less than those for the uncoated specimens. These reduced levels of bacterial adherence on the coated surface were still evident after treatment with saliva. Surface modification by SiO2-nanocomposite film coating has potential to improve wear resistance and susceptibility to plaque accumulation of CAD/CAM composite resin restorations.
authors.affiliation: Multidisciplinary Unit, Faculty of Science, Mahidol University.
authors.forename: Pranithida
authors.initials: P
authors.lastname: Kamonwanon
authors.forename: Nanako
authors.initials: N
authors.lastname: Hirose
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: Jun-Ichi
authors.initials: JI
authors.lastname: Sasaki
authors.forename: Haruaki
authors.initials: H
authors.lastname: Kitagawa
authors.forename: Ranna
authors.initials: R
authors.lastname: Kitagawa
authors.forename: Sroisiri
authors.initials: S
authors.lastname: Thaweboon
authors.forename: Toemsak
authors.initials: T
authors.lastname: Srikhirin
authors.forename: Satoshi
authors.initials: S
authors.lastname: Imazato
mesh_terms: D001422:Bacterial Adhesion; D003188:Composite Resins; D017076:Computer-Aided Design; D003764:Dental Materials; D006244:Hardness; D053761:Nanocomposites; D012822:Silicon Dioxide; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D012822:Silicon Dioxide