Effect of temperature on the flow properties of resin composite.
This study evaluated the effect of temperature on the flow characteristics of three different resin composites: a packable, a microhybrid, and a flowable. The film thickness of the three composites was measured at 21 degrees C, 41 degrees C, 61 degrees C, and 83 degrees C (+/- 1.0 degrees C). Five tests were performed for each resin composite at each of the four test temperatures for a total of 60 tests. The resin composite film thickness decreased as the filler percentage decreased and the temperature increased. The film thickness decrease was a logarithmic fit with a high correlation coefficient. All of the resin composites exhibited increased flow at elevated temperature. The flow property of the packable material at 41-61 degrees C was similar to that of the microhybrid at room temperature.
Division of Operative Dentistry, College of Dental Medicine, Medical University of South Carolina, Charleston, USA.
James S
JS
Knight
Robert
R
Fraughn
David
D
Norrington
D000704:Analysis of Variance; D003188:Composite Resins; D003793:Dental Restoration, Permanent / Q000379:methods; D008027:Light; D008422:Materials Testing; D044367:Phase Transition; D012212:Rheology; D013696:Temperature
D003188:Composite Resins; C466112:Esthet-X; C510276:Esthet-X Flow; C403464:SureFil packable composite