Assessment of changes in color and color parameters of light-cured composite resin after alternative polymerization methods
ABSTRACT Objective:To examine the amount of change in color and color parameters of a composite resin (Filtek P60) polymerized by five different polymerization methods. Methods: A Teflon mold (6mm in diameter, 2mm in height) was used to prepare the composite resin discs (n=10). G1: Polymerization wi...
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Published in | European journal of dentistry Vol. 7; no. 1; pp. 110 - 116 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
A-12, Second Floor, Sector -2, NOIDA -201301, India
Thieme Medical and Scientific Publishers Private Ltd
01.01.2013
Dental Investigations Society |
Subjects | |
Online Access | Get full text |
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Summary: | ABSTRACT
Objective:To examine the amount of change in color and color parameters of a composite resin (Filtek P60) polymerized by five different polymerization methods.
Methods: A Teflon mold (6mm in diameter, 2mm in height) was used to prepare the composite resin discs (n=10). G1: Polymerization with inlay oven; G2: Polymerization with HQTH and autoclave; G3: Polymerization with LED and autoclave; G4: Polymerization with HQTH; G5: Polymerization with LED. Colorimetric values of the specimens before and after polymerization were measured using a spectrophotometer. The CIE L*a*b color system was used for the determination of color difference. Analysis of variance (ANOVA) was used to analyze the data for significant differences. Tukey’s HSD test and paired two-tailed tests were used to perform multiple comparisons (α=.05).
Results: There were no significant differences in total color change (ΔE*ab) among the polymerization groups (P>.05). However, the lowest color change (ΔE*ab) value was 3.3 in LED and autoclave; the highest color change (ΔE*ab) value was 4.6 in HQTH. For all groups, CIE L*, C*ab and a*values decreased after polymerization (P<.05). The highest Δb* and ΔC*ab values were observed in specimens polymerized in an inlay oven (P<.05).
Conclusion: Composite resin material showed color changes above the clinically accepted value in all study groups (ΔE*ab≥3.3). All specimens became darker during investigation (ΔL*< 0). Specimens polymerized with inlay oven presented the highest Δb* values which means less yellow color in specimens. (Eur J Dent 2013;7:110-116) |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1305-7456 1305-7464 |
DOI: | 10.1055/s-0039-1699004 |