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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
1
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pubmed:dateCreated |
2007-12-21
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pubmed:abstractText |
Limited cure depth is a drawback of light-activated composites. We hypothesize that curing light transmission and cure depth are influenced by monomer reactivity and filler/resin refractive index mismatch. Light transmission throughout cure was recorded for composites based on strontium (refractive index 1.51) or barium (refractive index 1.53) glass fillers. Fillers were mixed (70 wt%) with 4 bisphenol-A diglycidyl-ether-dimethacrylate (bis-GMA):triethylene glycol dimethacrylate (TEGDMA) formulations with refractive indices ranging from 1.4703 to 1.5370. Following polymerization, cure depth and pre- and post-cure translucency parameters were determined. Transmission changes and cure depths related to monomer reactivity and filler/resin refractive index mismatch with significant interaction. Composites became more opaque or translucent on curing. Optimizing filler/resin refractive index mismatch provides increased curing depth and assists shade-matching.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
D
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Jan
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pubmed:issn |
0022-0345
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
87
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
84-8
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:18096900-Barium,
pubmed-meshheading:18096900-Bisphenol A-Glycidyl Methacrylate,
pubmed-meshheading:18096900-Color,
pubmed-meshheading:18096900-Composite Resins,
pubmed-meshheading:18096900-Glass,
pubmed-meshheading:18096900-Humans,
pubmed-meshheading:18096900-Materials Testing,
pubmed-meshheading:18096900-Optics and Photonics,
pubmed-meshheading:18096900-Polyethylene Glycols,
pubmed-meshheading:18096900-Polymers,
pubmed-meshheading:18096900-Polymethacrylic Acids,
pubmed-meshheading:18096900-Refractometry,
pubmed-meshheading:18096900-Strontium,
pubmed-meshheading:18096900-Surface Properties,
pubmed-meshheading:18096900-Temperature
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pubmed:year |
2008
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pubmed:articleTitle |
Refractive index mismatch and monomer reactivity influence composite curing depth.
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pubmed:affiliation |
The University of Birmingham, School of Dentistry, St. Chad's Queensway, Birmingham B4 6NN, England. a.c.c.shortall@bham.ac.uk
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pubmed:publicationType |
Journal Article
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