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Cure behaviour of visible light‐activated pattern materials
Author(s) -
Whitworth J. M.,
Makhani S. H. S.,
McCabe J. F.
Publication year - 1999
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1046/j.1365-2591.1999.00213.x
Subject(s) - polymerization , materials science , composite material , composite number , visible spectrum , polymer , optoelectronics
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 lightactivation for 30s. There were significant differences in the depth of cure of the three materials tested (P0.001). 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 (P0.001). 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.