title: Effect of relative humidity on the hydrophilicity of unset elastomeric impression materials.
abstract: This study aimed to analyze the effect of relative humidity (RH) on the initial hydrophilicity of unset elastomeric dental impression materials. Initial water contact angles were studied on thin unset films of 1 polyether and 4 polyvinyl siloxane (PVS) impression materials at 20%, 50%, and 80% RH by high-resolution drop shape analysis. One of 4 PVS materials reached the polyether's initial hydrophilicity. This PVS showed increased hydrophilicity with increasing RH. The initial hydrophilicity of impression materials can be influenced by the RH level. Accounting for RH will enhance the clinical relevance of hydrophilicity studies.
authors: Department of Prosthodontics, Section Medical Materials and Technology, University Hospiral Tuebingen, Germany. frank.rupp@med.uni-tuebingen.de
authors: Frank
authors: F
authors: Rupp
authors: Detlef
authors: D
authors: Axmann
authors: Jürgen
authors: J
authors: Geis-Gerstorfer
mesh_terms: D003760:Dental Impression Materials / Q000737:chemistry*; D020724:Elastomers / Q000737:chemistry*; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D011145:Polyvinyls / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D017155:Wettability
chemical_list: D003760:Dental Impression Materials; D020724:Elastomers; C022821:Impregum; D011145:Polyvinyls; D012117:Resins, Synthetic; D012833:Siloxanes; C480691:aquasil; C034183:vinyl polysiloxane; D014867:Water