Journal Paper

Paper Information

Journal: JOURNAL OF MASHHAD DENTAL SCHOOL | Year:1391 | Volume:36 | Issue:1 (80) | Start Page:45 | End Page:52

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Information Journal Paper

Title

COMPARISON OF DEGREE OF CONVERSION OF PACKABLE AND HYBRID COMPOSITES BY FOURIER TRANSFORM INFRARED SPECTROSCOPY

Writers

DAVARI ABDOLRAHIM | KASHFI MARYAM | MIRSEIFINEJADNAEENI RAHELEHSADAT

Pages

 Start Page 45 | End Page 52

Keywords

DEGREE OF CONVERSION (DC)Q3

Abstract

 Introduction: Clinical performance of light cured resin composites is related to their degree of polymerization. The purpose of this study was to compare the degree of conversion of packable and HYBRID COMPOSITEs by FTIR (Fourier Transform Infrared Spectroscopy).Materials & Methods: In this experimental study, 40 composite disks were prepared in two groups from Z250 and P60 composites. Each group was divided into four subgroups (2mm thickness cured with QTH unit, 2mm thickness cured with LED unit, 5mm thickness cured with QTH unit, and 5mm thickness cured with LED unit). Then samples were evaluated by FTIR to determine the degree of conversion (DC). Data were analyzed by Kolmogorov-Smirnov and three way ANOVA.Results: There was not a significant difference among the DC of the materials tested. LED significantly increased the degree of conversion of materials tested (P<0.001). DC values were significantly greater in 2mm diameter samples vs 5mm ones (P<0.001).Conclusion: The use of incremental technique in deep cavities restored with these composites is suggested. Also using LED is advised for curing composites because of a better result.

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