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ORIGINAL RESEARCH Table of Contents   
Year : 2007  |  Volume : 18  |  Issue : 4  |  Page : 173-176
Degree of conversion and residual stress of preheated and room-temperature composites


Department of Conservative, Dentistry and Endodontics, College of Dental Surgery, Saveetha University, Chennai, India

Correspondence Address:
N Prasanna
Department of Conservative, Dentistry and Endodontics, College of Dental Surgery, Saveetha University, Chennai
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-9290.35827

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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 40C, 50C, and 60C 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.


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