High irradiance curing and anomalies of exposure reciprocity law in resin-based materials

Mohammed Hadis, JG Leprince, Adrian Shortall, J Devaux, G Leloup, William Palin

Research output: Contribution to journalArticle

78 Citations (Scopus)


OBJECTIVES The aim of this work was to investigate the effect of high irradiance curing on resultant degree of conversion of 'flowable' resin composites and their counterpart higher viscosity paste materials. METHODS Five commercial flowable materials (Venus; Heraeus Kulzer, Synergy D6; Coltene, Premise; Kerr, Grandio; Voco and Gradia; GC Corp) and their counterpart higher viscosity restorative versions were tested. Specimens were cured with a halogen Swiss Master Light (EMS, Switzerland) using five different curing protocols with similar radiant exposure (18J/cm(2)): 400mW/cm(2) for 45s, 900mW/cm(2) for 20s, 1500mW/cm(2) for 12s, 2000mW/cm(2) for 9s and 3000mW/cm(2) for 6s. Degree of conversion (DC) was measured in real time by Fourier transform near infrared spectroscopy (FT-NIRS). RESULTS Three- and subsequent two way ANOVA testing revealed significant differences (p≤0.02) with respect to "composite type" and "cure protocol" for DC for all 5 product comparisons. Supplementary one-way ANOVA also revealed significant differences between curing protocols (p
Original languageEnglish
Pages (from-to)549-557
Number of pages9
JournalJournal of Dentistry
Issue number8
Publication statusPublished - 1 Aug 2011


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