IADR Abstract Archives
Depth of Cure and Translucency of a Novel Bulk-Fill Composite
Objectives: Bulk-fill composites may reduce voids during placement and allow for a more efficient direct restoration procedure. The objective of this study was to determine the depth of cure (DOC) and translucency parameter (TP) of several different bulk-fill composites.
Methods: Two bulk-fill flowable (Venus Bulk Flow ONE, Heraeus and Surefil SDR flow+, Dentsply) and 2 paste (Tetric EvoCeram Bulk Fill, Ivoclar and Filtek ONE Bulk Fill, 3M) composites were tested. DOC specimens (n=7/group) were prepared (10mm thickness x 6mm diameter metal mold) and cured (Elipar Deepcure curing light (3M, >1000mW/cm2)) per each’s IFU. Uncured composite was removed using a plastic spatula. Using digital calipers, one-half of the maximum length of the remaining specimen was recorded as DOC. Translucency specimens (n=10/group) were fabricated in 10mm diameter x 2mm thickness silicone molds, light-cured through a mylar strip and glass slide, wet-ground (600grit SiC paper) to final thickness of 2.0+/-0.1mm as confirmed with calipers, and cleaned. L*a*b* values were taken using a spectrophotometer (CM-700d; Konica Minolta) against a white and black background made from poster board. TP was measured using ΔE00 calculated with the CIEDE2000 color difference formula. A higher TP corresponds to higher translucency. Data were analyzed (1-way ANOVA, Tukey’s, p<0.05).
Results: The mean and standard deviation of DOC and TP for each composite are listed in Table 1. Statistically significant differences between materials are indicated by different superscript letters.
Conclusions: Achieving a deeper depth of cure while maintaining relative opacity provides a clinical advantage. These data may be helpful references for clinicians.
Methods: Two bulk-fill flowable (Venus Bulk Flow ONE, Heraeus and Surefil SDR flow+, Dentsply) and 2 paste (Tetric EvoCeram Bulk Fill, Ivoclar and Filtek ONE Bulk Fill, 3M) composites were tested. DOC specimens (n=7/group) were prepared (10mm thickness x 6mm diameter metal mold) and cured (Elipar Deepcure curing light (3M, >1000mW/cm2)) per each’s IFU. Uncured composite was removed using a plastic spatula. Using digital calipers, one-half of the maximum length of the remaining specimen was recorded as DOC. Translucency specimens (n=10/group) were fabricated in 10mm diameter x 2mm thickness silicone molds, light-cured through a mylar strip and glass slide, wet-ground (600grit SiC paper) to final thickness of 2.0+/-0.1mm as confirmed with calipers, and cleaned. L*a*b* values were taken using a spectrophotometer (CM-700d; Konica Minolta) against a white and black background made from poster board. TP was measured using ΔE00 calculated with the CIEDE2000 color difference formula. A higher TP corresponds to higher translucency. Data were analyzed (1-way ANOVA, Tukey’s, p<0.05).
Results: The mean and standard deviation of DOC and TP for each composite are listed in Table 1. Statistically significant differences between materials are indicated by different superscript letters.
Conclusions: Achieving a deeper depth of cure while maintaining relative opacity provides a clinical advantage. These data may be helpful references for clinicians.