Open AccessDegree of conversion and residual stress of preheated and room-temperature composites
Author(s) -
N. D. Prasanna,
Y Pallavi Reddy,
S Kavitha,
L Lakshmi Narayanan
Publication year - 2007
Publication title -
indian journal of dental research/indian journal of dental research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.277
H-Index - 43
eISSN - 1998-3603
pISSN - 0970-9290
DOI - 10.4103/0970-9290.35827
Subject(s) - composite material , materials science , degree (music) , residual stress , stress (linguistics) , residual , mathematics , acoustics , linguistics , philosophy , physics , algorithm
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.