title: Consistency, working time and setting time of elastomeric impression materials.
abstract: This paper describes the development of an instrument for determining consistency, working time and setting time of elastomeric impression materials. The operating principle involves the application of a fixed compressive strain and the resulting stress is measured. This instrument has been called a Comprheometer. Temperature control is achieved by water circulation so that simulated room or open-mouth temperatures can be used. Values of consistency and working time are presented for a range of elastomeric materials at room temperature. Also, setting times determined under oral conditions are recorded.
authors: Department of Dental Prosthetics, University of Birmingham, U.K.
authors: K D
authors: KD
authors: Jamani
authors: E
authors: E
authors: Harrington
authors: H J
authors: HJ
authors: Wilson
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003760:Dental Impression Materials; D004867:Equipment Design; D008422:Materials Testing / Q000295:instrumentation*; D012117:Resins, Synthetic; D012212:Rheology; D012408:Rubber; D012826:Silicone Elastomers; D012828:Silicones; D012833:Siloxanes; D013314:Stress, Mechanical; D013440:Sulfides; D013997:Time Factors; D014783:Viscosity
chemical_list: D003760:Dental Impression Materials; D012117:Resins, Synthetic; D012826:Silicone Elastomers; D012828:Silicones; D012833:Siloxanes; D013440:Sulfides; D012408:Rubber; C032915:polysulfide