title: Ultrasonic monitoring of the setting of silicone elastomeric impression materials.
abstract: This study used an ultrasonic measurement device to monitor the setting behavior of silicone elastomeric impression materials, and the influence of temperature on setting behavior was determined. The ultrasonic device consisted of a pulser-receiver, transducers, and an oscilloscope. The two-way transit time through the mixing material was divided by two to account for the down-and-back travel path; then it was multiplied by the sonic velocity. Analysis of variance and the Tukey honest significant difference test were used. In the early stages of the setting process, most of the ultrasonic energy was absorbed by the elastomers and the second echoes were relatively weak. As the elastomers hardened, the sonic velocities increased until they plateaued. The changes in sonic velocities varied among the elastomers tested, and were affected by temperature conditions. The ultrasonic method used in this study has considerable potential for determining the setting processes of elastomeric impression materials.
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry.
authors.forename: Tomoe
authors.initials: T
authors.lastname: Kanazawa
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Murayama
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Furuichi
authors.forename: Arisa
authors.initials: A
authors.lastname: Imai
authors.forename: Shunichi
authors.initials: S
authors.lastname: Suda
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Kurokawa
authors.forename: Toshiki
authors.initials: T
authors.lastname: Takamizawa
authors.forename: Masashi
authors.initials: M
authors.lastname: Miyazaki
mesh_terms: D003760:Dental Impression Materials; D004548:Elasticity; D020724:Elastomers; D008422:Materials Testing; D012826:Silicone Elastomers; D014465:Ultrasonics
chemical_list: D003760:Dental Impression Materials; D020724:Elastomers; D012826:Silicone Elastomers