IADR Abstract Archives
Depth of Cure and Vickers Hardness of Flowable Bulk-Fill Composites
Objectives: To compare the depth of cure (DoC) and Vickers hardness (HV) of 4 flowable bulk-fill composites.
Methods: DoC was conducted according to method in ISO 4049 (n=3). The reported DoC values were not divided by 2. Specimens for HV were cured in a 10×4mm (diameter×height) stainless steel mold using curing light at intensity of 650 mW/cm2 for 20-second and 1200 mW/cm2 for 10-second respectively, except for Venus Bulk Flow One, for which 20-second irradiation was used at intensity of both 650 and 1200 mW/cm2 according to its IFU. After the specimens conditioned in water at 37°C for 24h, HV at the top and bottom surfaces of specimens were obtained using HV ASTM T.1 method at setup of 300-gram force and 10-second duration (n=3). Bottom to top hardness ratio (B/T%) of the 4mm thick specimen was reported. Statistical analysis was performed using One-way ANOVA and Tukey’s method for pairwise comparison to determine significant differences among groups (α=0.05).
Results: The results are summarized in the following Table. Within each row, the same letter indicates that there is no statistical difference between values at α=0.05.
Conclusions: Simplishade Bulk Fill Flow composite exhibits advanced DoC per modified ISO4049 method. The bottom to top HV ratio at 4mm depth is greater than 90%. These properties assured Simplishade Bulk Fill Flow adequate curing as bulk placement composite.
Methods: DoC was conducted according to method in ISO 4049 (n=3). The reported DoC values were not divided by 2. Specimens for HV were cured in a 10×4mm (diameter×height) stainless steel mold using curing light at intensity of 650 mW/cm2 for 20-second and 1200 mW/cm2 for 10-second respectively, except for Venus Bulk Flow One, for which 20-second irradiation was used at intensity of both 650 and 1200 mW/cm2 according to its IFU. After the specimens conditioned in water at 37°C for 24h, HV at the top and bottom surfaces of specimens were obtained using HV ASTM T.1 method at setup of 300-gram force and 10-second duration (n=3). Bottom to top hardness ratio (B/T%) of the 4mm thick specimen was reported. Statistical analysis was performed using One-way ANOVA and Tukey’s method for pairwise comparison to determine significant differences among groups (α=0.05).
Results: The results are summarized in the following Table. Within each row, the same letter indicates that there is no statistical difference between values at α=0.05.
Conclusions: Simplishade Bulk Fill Flow composite exhibits advanced DoC per modified ISO4049 method. The bottom to top HV ratio at 4mm depth is greater than 90%. These properties assured Simplishade Bulk Fill Flow adequate curing as bulk placement composite.