Presentation Title
Multi-Peak Versus Single-Peak Curing-Light Heat-Generation on Pulpal-Wall with Bulk-Fill-Resin-Composite
Speaker Credentials
PG-Operative Dentistry
Speaker Credentials
DDS
College
College of Dental Medicine, Post-Graduate
Location
Nova Southeastern University, Davie, Florida, USA
Format
Podium Presentation
Start Date
21-2-2020 8:30 AM
End Date
21-2-2020 4:00 PM
Abstract
Objectives: Compare heat-generation of various multi-peak-LCUs with single-peak-LCU at the pulpal-wall(PW) of deep cavities when curing bulk-fill-resin-composites(BFRC) containing Ivocerin photoinitiator. Background: Multi-peak light-curing-units(LCU) are gaining popularity due to potential depth-of-cure concerns with single-peak LCUs, especially with photoinitiator alternatives used in (BFRC). However, there is limited data on their heat-generation.
Methods: Single extracted/sound human-molar was used for standardized set-up. Box cavity(3.5x2.5x3mm,0.5mm remaining-dentin-thickness) was prepared on buccal-surface for BFRC placement, access window was opened from the opposite lingual-surface to expose PW of the pulp-chamber. PW was reflected to an infrared thermal-camera(Thermovision-A320,FLIR) via minimal-energy-loss-mirror(NT99-456,Edmund) to measure transferred-heat from LCUs through dentin. Three multi-peak LCUs(Bluephase-PowerCure/IvoclarVivadent, Valo/Ultradent, D-Light-Pro/GC) were compared to one single-peak LCU(Demi Ultra/Kerr) when curing BFRC(Tetric-EvoCeram Bulk-Fill/IvoclarVivadent,IVA-shade,3mm). Restorations were placed with no bonding agent for easy BFRC removal after each curing. PW temperatures during full-curing-cycle(10sec.) were recorded in four LCU groups(n=10). Baseline-to-maximum temperatures(ΔT) were measured (Thermavision ExaminIR) and statistically analyzed using One-way ANOVA and Tukey’s post-hoc tests.
Results: There were statistically significant differences among LCU groups in ΔT(F(9,90)=154.9, pp
Conclusions: Data showed no significant difference in multi-peak versus single-peak LCUs to claim that heat generation of one is superior than other. Single-peak LCU came in second lowest and was between various multi-peak LCUs. Further studies are necessary using body-temperature as baseline.
Multi-Peak Versus Single-Peak Curing-Light Heat-Generation on Pulpal-Wall with Bulk-Fill-Resin-Composite
Nova Southeastern University, Davie, Florida, USA
Objectives: Compare heat-generation of various multi-peak-LCUs with single-peak-LCU at the pulpal-wall(PW) of deep cavities when curing bulk-fill-resin-composites(BFRC) containing Ivocerin photoinitiator. Background: Multi-peak light-curing-units(LCU) are gaining popularity due to potential depth-of-cure concerns with single-peak LCUs, especially with photoinitiator alternatives used in (BFRC). However, there is limited data on their heat-generation.
Methods: Single extracted/sound human-molar was used for standardized set-up. Box cavity(3.5x2.5x3mm,0.5mm remaining-dentin-thickness) was prepared on buccal-surface for BFRC placement, access window was opened from the opposite lingual-surface to expose PW of the pulp-chamber. PW was reflected to an infrared thermal-camera(Thermovision-A320,FLIR) via minimal-energy-loss-mirror(NT99-456,Edmund) to measure transferred-heat from LCUs through dentin. Three multi-peak LCUs(Bluephase-PowerCure/IvoclarVivadent, Valo/Ultradent, D-Light-Pro/GC) were compared to one single-peak LCU(Demi Ultra/Kerr) when curing BFRC(Tetric-EvoCeram Bulk-Fill/IvoclarVivadent,IVA-shade,3mm). Restorations were placed with no bonding agent for easy BFRC removal after each curing. PW temperatures during full-curing-cycle(10sec.) were recorded in four LCU groups(n=10). Baseline-to-maximum temperatures(ΔT) were measured (Thermavision ExaminIR) and statistically analyzed using One-way ANOVA and Tukey’s post-hoc tests.
Results: There were statistically significant differences among LCU groups in ΔT(F(9,90)=154.9, pp
Conclusions: Data showed no significant difference in multi-peak versus single-peak LCUs to claim that heat generation of one is superior than other. Single-peak LCU came in second lowest and was between various multi-peak LCUs. Further studies are necessary using body-temperature as baseline.