title: Effect of mouthrinses on microhardness and wear of composite and compomer restoratives.
abstract: This study investigated the effect of commercially available mouthrinses on the microhardness and wear of composite (Esthet-X, Dentsply) and compomer (Dyract Posterior, Dentsply) restoratives. Fifty-four hardness and 36 wear specimens of each material were fabricated and stored in distilled water at 37 degrees C for two weeks. The specimens were then randomly divided into six equal groups and exposed to the following solutions for 24 hours at 37 degrees C: distilled water [WC] (control); Listerine Original [AP] (alcohol-containing essential oil/phenolic compound mouthrinse); Colgate Chloropharm [AC] (alcohol-containing chlorhexidine mouthrinse); Oral B Tooth & Gum Care [AF] (alcohol-containing fluoride mouthrinse); Oral B Tooth & Gum Care Alcohol Free [OF] (alcohol free fluoride mouthrinse) and Oral B Sensitive [PF] (phosphoric acid containing fluoride mouthrinse). After conditioning, the specimens were subjected to hardness testing using a digital microhardness tester (load = 500 gf; dwell time = 15 seconds) and wear testing with a reciprocal compression-sliding system (contact stress = 20 MPa). Wear depth was measured every 1,000 cycles up to 10,000 cycles using profilometry. Data was analyzed using ANOVA/Scheffe's test at significance level 0.05. Dyract was significantly softened by AP, while Esthet-X was significantly softened by AC and AP. The wear resistance of Dyract was significantly reduced after exposure to PF, while the wear resistance of Esthet-X was significantly reduced by AC. The effect of mouthrinses on hardness and wear was material dependent.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, Republic of Singapore. rsdyapuj@nus.edu.sg
authors.forename: Adrian U J
authors.initials: AU
authors.lastname: Yap
authors.forename: Bernard W Y
authors.initials: BW
authors.lastname: Tan
authors.forename: L C
authors.initials: LC
authors.lastname: Tay
authors.forename: K M
authors.initials: KM
authors.lastname: Chang
authors.forename: T K
authors.initials: TK
authors.lastname: Loy
authors.forename: Betty Y Y
authors.initials: BY
authors.lastname: Mok
mesh_terms: D000704:Analysis of Variance; D000891:Anti-Infective Agents, Local / Q000737:chemistry; D002327:Cariostatic Agents / Q000737:chemistry; D002710:Chlorhexidine / Q000737:chemistry; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent; D004338:Drug Combinations; D000431:Ethanol / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D009067:Mouthwashes / Q000737:chemistry*; D010756:Phosphoric Acids / Q000737:chemistry; D012459:Salicylates / Q000737:chemistry; D013696:Temperature; D013729:Terpenes / Q000737:chemistry; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D000891:Anti-Infective Agents, Local; D002327:Cariostatic Agents; D020770:Compomers; D003188:Composite Resins; D004338:Drug Combinations; C088486:Dyract; C466112:Esthet-X; D009067:Mouthwashes; D010756:Phosphoric Acids; D012459:Salicylates; D013729:Terpenes; D014867:Water; D000431:Ethanol; C057473:Listerine; D005459:Fluorides; D002710:Chlorhexidine