Degree of conversion and residual stress of preheated and room-temperature composites.
The aim of this study was to determine the degree of conversion and residual stress of resin composite preheated to different temperatures and to compare it to room-temperature composite. The composite resin was preheated to 40 degrees C, 50 degrees C, and 60 degrees C and packed into brass rings and light-cured. The degree of conversion and residual stress were analysed using Fourier transform infra-red spectroscopy and X-ray diffraction, respectively. The results obtained were tabulated and statistically analyzed using Kruskal-Wallis test and Tukey's honestly significantly different test. The results showed significant increase in the degree of conversion and residual stress with increase in preheating temperature.
Prasanna
N
N
Department of Conservative, Dentistry and Endodontics, College of Dental Surgery, Saveetha University, Chennai, India. prasu_endo@yahoo.com
Pallavi Reddy
Y
Y
Kavitha
S
S
Lakshmi Narayanan
L
L
D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects; D003764:Dental Materials / Q000737:chemistry* / Q000528:radiation effects; D004548:Elasticity; D006358:Hot Temperature; D006801:Humans; D008027:Light; D008422:Materials Testing; D017550:Spectroscopy, Fourier Transform Infrared; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D014961:X-Ray Diffraction
C520091:CeramX; D003188:Composite Resins; D003764:Dental Materials