Document Detail


Light transmittance characteristics of light-cured composite resins.
MedLine Citation:
PMID:  10483402     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The purpose of this study was: (1) to examine the light transmittance characteristics of various shades of light-cured composite resins, and (2) to evaluate the effect of light transmittance characteristics on the color of the resins. METHODS: Eleven shades of two composite resins were used. Specimens with four different thicknesses (0.5, 1.0, 2.0 and 3.0 mm) were prepared. The transmittance at wavelengths from 400 to 700 nm was measured. Also, the color values and the color differences among thicknesses of a specimen on the CIE L*a*b* color system were determined by a digital chroma meter. The differences in the transmittance, color values and color difference were determined by using a one-way analysis of variance (ANOVA) combined with a Tukey multiple-range test. RESULTS: Significant differences were found in the wavelength dependence of transmittance between the two materials, and among shades of each material. The transmittances of the darker shades of one material were significantly lower at lower wavelengths than the other shades, but were nearly equal or significantly higher at higher wavelengths. There was a significant correlation between the changing ratio of transmittance and the color difference. Two materials showed significant differences in delta a* and delta b* of the chromatic component of color difference. SIGNIFICANCE: The results of this study indicate that light transmittance characteristics, including the wavelength dependence, play an important role for the color of a composite resin. The significant difference in light transmittance characteristics among materials and shades will affect their clinical appearance.
Authors:
H Arikawa; K Fujii; T Kanie; K Inoue
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Dental materials : official publication of the Academy of Dental Materials     Volume:  14     ISSN:  0109-5641     ISO Abbreviation:  Dent Mater     Publication Date:  1998 Nov 
Date Detail:
Created Date:  1999-09-21     Completed Date:  1999-09-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8508040     Medline TA:  Dent Mater     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  405-11     Citation Subset:  D    
Affiliation:
Department of Dental Materials Science, Kagoshima University Dental School, Japan. hiro@dentb.hal.kagoshima-u.ac.jp
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Color
Composite Resins / chemistry*
Light
Prosthesis Coloring*
Scattering, Radiation
Statistics, Nonparametric
Chemical
Reg. No./Substance:
0/Composite Resins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Antimicrobial activities of dental impression materials.
Next Document:  The effect of casting conditions on the biaxial flexural strength of glass-ceramic materials.