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Lookup NU author(s): Professor John Whitworth, Dr Shaniff Makhani, Professor John McCabe
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Aim: This study tested the hypothesis that the cure behaviour (depth of cure and polymerization contraction) of light-activated pattern materials was no worse than that of light-activated composite resins, allowing them to be handled in a similar fashion. Methodology: Depth of cure was measured by a penetrometer method. Results: Cure depths were comparable to those of composite resins, ranging from 3.52mm (Lumin-X paste) to 6.76mm (Visioform) after visible light activation for 30s. There were significant differences in the depth of cure of the three materials tested (P < 0.001). Polymerization contraction was assessed by a minimal load transducer method. Values ranged from 0.45% (Lumin-X paste) to 1.89% (Visioform), lower than that of composite resins. There were significant differences in the polymerization contraction values for each of the three materials (P < 0.001). Conclusions: It was concluded that light-activated pattern materials cure in a manner comparable to composite resins, and may be built up incrementally in a similar fashion.
Author(s): Whitworth JM; McCabe JF; Makhani SHS
Publication type: Article
Publication status: Published
Journal: International Endodontic Journal
Year: 1999
Volume: 32
Issue: 3
Pages: 191-196
Print publication date: 01/05/1999
ISSN (print): 0143-2885
ISSN (electronic): 1365-2591
Publisher: Wiley-Blackwell Publishing Ltd.
URL: http://dx.doi.org/10.1046/j.1365-2591.1999.00213.x
DOI: 10.1046/j.1365-2591.1999.00213.x
PubMed id: 10530206
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