title: Contact angles of contemporary type 3 impression materials.
abstract: The aim of this study was to investigate the contact angles of six different type 3 dental impression materials (DIMs). Contact angles (n = 3) were continuously determined for 20 seconds after placing 4 MuL of deionized water onto a thin layer (50 Mum) of freshly mixed DIM (polyvinyl siloxane, C-silicone, polyether, and hybrid DIMs). Data were subjected to parametric statistics (P < .05). Contact angles ranged from 76.1 +/- 5.6 degrees to 119.5 +/- 1.8 degrees at 0 seconds and from 11.7 +/- 1.6 degrees to 74.7 +/- 1.1 degrees at 5 seconds after droplet deposition. The siloxanes showed significantly higher contact angles at 0 and 5 seconds compared to all other DIMs tested (P < .05). The newly introduced DIMs with a polyether backbone showed promising results regarding their hydrophilicity.
authors.affiliation: Department of Prosthetic Dentistry, School of Dental Medicine, Justus-Liebig University, Giessen, Germany. balkenhol@dentist.med.uni-giessen.de
authors.forename: Markus
authors.initials: M
authors.lastname: Balkenhol
authors.forename: Marc
authors.initials: M
authors.lastname: Eichhorn
authors.forename: Bernd
authors.initials: B
authors.lastname: Wostmann
mesh_terms: D003760:Dental Impression Materials / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D011145:Polyvinyls / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors; D014783:Viscosity; D014867:Water / Q000737:chemistry; D017155:Wettability
chemical_list: D003760:Dental Impression Materials; D004129:Dimethylpolysiloxanes; C022821:Impregum; C020964:MDX 4-4210; D011145:Polyvinyls; D012117:Resins, Synthetic; D012826:Silicone Elastomers; D012833:Siloxanes; C034183:vinyl polysiloxane; D014867:Water