Depth of cure of high-viscosity bulk-fill and conventional resin composites using varying irradiance exposures with a light-emitting diode curing unit.

The purpose of this study was to determine the depth of cure (DOC) of three resin-based composites (RBCs) using varying irradiance exposures with a corded light-emitting diode curing unit. DOCs for Filtek Z250, TPH Spectra, and Tetric EvoCeram Bulk Fill were determined using the International Organization for Standardization (ISO) Standard 4049. The RBCs were light-polymerized using three different power modes and manufacturer-recommended curing times. Irradiance was determined using a spectrometer sensor and the total energy density was calculated for each power mode and concomitant polymerization time. The DOC data were analyzed with a two-way analysis of variance and Tukey's post hoc test. Tetric EvoCeram Bulk Fill produced significantly greater DOCs than TPH and Z250 (P < 0.05) for all three power mode settings. Overall, the DOC of Tetric EvoCeram Bulk Fill was greater than those of TPH and Z250 at all power settings, but the individual RBCs did not show a significant DOC difference among the three power settings (P > 0.05).

[1]  W. Barkmeier,et al.  Effect of mold diameter on the depth of cure of a resin‐based composite material , 2017, European journal of oral sciences.

[2]  D. Labrie,et al.  Characterizing the output settings of dental curing lights. , 2016, Journal of dentistry.

[3]  C. Lin,et al.  Depth of cure of bulk fill composites with monowave and polywave curing lights. , 2015, American journal of dentistry.

[4]  D. Labrie,et al.  Effect of High Irradiance on Depth of Cure of a Conventional and a Bulk Fill Resin-based Composite. , 2015, Operative dentistry.

[5]  D. Labrie,et al.  Examining exposure reciprocity in a resin based composite using high irradiance levels and real-time degree of conversion values. , 2015, Dental materials : official publication of the Academy of Dental Materials.

[6]  D. Watts,et al.  Robust spectrometer-based methods for characterizing radiant exitance of dental LED light curing units. , 2015, Dental materials : official publication of the Academy of Dental Materials.

[7]  W. Barkmeier,et al.  Curing characteristics of a composite. part 2: the effect of curing configuration on depth and distribution of cure. , 2014, Dental materials : official publication of the Academy of Dental Materials.

[8]  Anne Marsden,et al.  International Organization for Standardization , 2014 .

[9]  G. G. Zeller,et al.  A laboratory evaluation of bulk-fill versus traditional multi-increment-fill resin-based composites. , 2013, Journal of the American Dental Association.

[10]  K. Jandt,et al.  A brief history of LED photopolymerization. , 2013, Dental materials : official publication of the Academy of Dental Materials.

[11]  I. Meyers,et al.  Comparison of Depth of Cure, Hardness and Heat Generation of LED and High Intensity QTH Light Sources , 2011, European journal of dentistry.

[12]  R. van Noort,et al.  The influence of plastic light cure sheaths on the hardness of resin composite. , 2009, Operative dentistry.

[13]  B. K. Moore,et al.  Depth of cure of dental resin composites: ISO 4049 depth and microhardness of types of materials and shades. , 2008, Operative dentistry.

[14]  Carlos Eduardo Fellows,et al.  Composite depth of cure obtained with QTH and LED units assessed by microhardness and micro-Raman spectroscopy. , 2007, Operative dentistry.

[15]  J. McCabe,et al.  Light exposure required for optimum conversion of light activated resin systems. , 2006, Dental materials : official publication of the Academy of Dental Materials.

[16]  A. Uhl,et al.  Influence of heat from light curing units and dental composite polymerization on cells in vitro. , 2006, Journal of dentistry.

[17]  A. Yap,et al.  Composite cure and shrinkage associated with high intensity curing light. , 2003, Operative dentistry.

[18]  F. Eichmiller,et al.  Curing-light intensity and depth of cure of resin-based composites tested according to international standards. , 2002, Journal of the American Dental Association.

[19]  G. Pearson,et al.  Water sorption and solubility of resin-based materials following inadequate polymerization by a visible-light curing system. , 1989, Journal of oral rehabilitation.

[20]  J. Ferracane,et al.  Relationship between shade and depth of cure for light-activated dental composite resins. , 1986, Dental materials : official publication of the Academy of Dental Materials.