title: Effect of surfactant on surface hardness of dental stone and investment casts produced from polyvinyl siloxane duplicating materials.
abstract: Polyvinylsiloxane duplicating materials are typically treated with a topical surfactant before pouring dental models, but the use of topical surfactants in the dental laboratory may affect the surface hardness of the resultant models. The effect of two different topical surfactants on surface hardness of two dental stones (FujiRock and Dentstone) and one phosphate bonded investment material (Croform WB) produced from polyvinyl siloxane (PVS) dental laboratory duplicating moulds was investigated. Topical surfactants affected the surface hardness of FujiRock, Dentstone and Croform WB investment material. Surface hardness of FujiRock increased with Wax-Mate surfactant. However, surface hardness of Croform WB investment material decreased with both topical surfactants.
authors.affiliation: Department of Prosthodontics, Kings College London Dental Institute, UK.
authors.forename: Attalah
authors.initials: A
authors.lastname: Al-Johani
authors.forename: Robert K F
authors.initials: RK
authors.lastname: Clark
authors.forename: Andrzej S
authors.initials: AS
authors.lastname: Juszczyk
authors.forename: David R
authors.initials: DR
authors.lastname: Radford
mesh_terms: D000179:Acrylates / Q000737:chemistry; D002133:Calcium Sulfate / Q000737:chemistry*; D003734:Dental Casting Investment / Q000737:chemistry*; D003760:Dental Impression Materials / Q000737:chemistry*; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D003765:Models, Dental; D011145:Polyvinyls / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D000179:Acrylates; D003734:Dental Casting Investment; D003760:Dental Impression Materials; D011145:Polyvinyls; D012833:Siloxanes; D013501:Surface-Active Agents; C034183:vinyl polysiloxane; C029884:Croform; D002133:Calcium Sulfate