PMID: 8595835Nov 1, 1995Paper

Properties of heat-treated composites after aging in water

Dental Materials : Official Publication of the Academy of Dental Materials
J L FerracaneJ R Condon

Abstract

Post-cure heat treatments have been shown to increase the fracture toughness and elastic modulus of composites. The objective of this study was to determine if the increase remained after the composites were aged in water. METHODS. The fracture toughness (K(lc)), flexural modulus and flexural strength of four experimental and one commercial composite (Z-100, 3M Dental Products) were tested after 1, 7, 30, 60 and 180 d of aging in 37 degrees C water. The four experimental composites were made with a BisGMA/TEGDMA resin and were characterized as follows: Micro = 38 vol% silane-treated silica, Fine = 65 vol% silane-treated quartz of 1-2 micrometer average size, Hybrid = 65 vol% silane treated quartz of a mixture of 1-2 micrometer average and 8 micrometer average size, and Large = 65 vol% quartz of 8 micrometer average size (of which only 75% were silane-treated). All specimens were light-cured (normal-cured; Triad II - 80 s). One set of each composite was further heat-cured at 120 degrees C for 10 min (heat-cured). A third set of the Hybrid was heat-cured with simultaneous light exposure (Elipar, Espe) for the first 3 min. By 30 d, normal-cured and heat-cured specimens showed significant (ANOVA/Tukey's test; p < or = 0.05) reducti...Continue Reading

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Jul 27, 1999·Journal of Biomedical Materials Research·M A Shin, J L Drummond
Jul 18, 2000·Journal of Biomedical Materials Research·S S ScherrerU C Belser
Jul 18, 2000·Journal of Biomedical Materials Research·N K Sarkar
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Aug 11, 2004·Dental Materials : Official Publication of the Academy of Dental Materials·L Musanje, B W Darvell
Jun 1, 2000·Dental Materials : Official Publication of the Academy of Dental Materials·Y H Bagis, F A Rueggeberg
Jun 1, 2000·Dental Materials : Official Publication of the Academy of Dental Materials·H H XuJ M Antonucci
Dec 13, 2001·Dental Materials : Official Publication of the Academy of Dental Materials·J SabbaghG Leloup
Jan 5, 2002·Dental Materials : Official Publication of the Academy of Dental Materials·Jung Wook KimFranklin García-Godoy
Jul 6, 2002·Dental Materials : Official Publication of the Academy of Dental Materials·Anthony G GegauffRobert R Seghi
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Dental Materials : Official Publication of the Academy of Dental Materials
J L Ferracane, J R Condon
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