IADR Abstract Archives
Intrapulpal Temperature Evaluation During Direct Pulp Capping Procedures
Objectives: To evaluate the effect of light-activated liners and bases on pulp temperature rising.
Methods: Class I tooth preparations with 5 mm x 4 mm and 4 mm in depth were prepared on third molars leaving 0.5 mm of dentin at the pulpal floor with a 1 mm diameter of pulp exposure. Teeth were placed in a customized oral cavity chamber simulator in which the initial temperature was standardized at 34oC. The overall temperature variations in the pulp chamber during the light-activation processes were live recorded using an infrared camera (FLIR ONE PRO, FLIR Systems). The liners and bases evaluated were: Dycal (Dentisply), TheraCal (Bisco), Biodentin (Septodent), Vitrebond (3M/ESPE) and Fuji IX (GC) followed by restoration with a bulk fill composite (Ivoclar Vivadent). Light-polymerization of the materials was carried out with Valo Grand (Ultradent) at 1000 mW/cm2keeping the tip of the device in contact with the tooth surface. The materials used were inserted into the tooth preparation in layers ranging from 0.5 mm (Dycal) to 2 mm. A power analysis was conducted to determine the sample size (N=3) to provide a power of at least 0.8 at a significance level of α=0.05 (β=0.2). Statistical analyses were performed using ANOVA and Tukey’s test for multiple comparison.
Results: The pulp chamber temperature increased above 42.5oC for all light-activated procedures evaluated. For the light-activated liners and base (Theracal and Vitrebond), the temperature reached over 54oC. Neither of the materials added as a second layer was capable of providing thermal insulation for light-activated bonding and restorative procedures (p=0.25). However, the higher the number of procedures requiring light-activation, the longer the pulp temperature remained above 42.5oC.
Conclusions: For direct pulp capping procedures, a reduced number of procedures requiring light-activation should be indicated in order to reduce intrapulpal temperature raising above 42.5oC.
Methods: Class I tooth preparations with 5 mm x 4 mm and 4 mm in depth were prepared on third molars leaving 0.5 mm of dentin at the pulpal floor with a 1 mm diameter of pulp exposure. Teeth were placed in a customized oral cavity chamber simulator in which the initial temperature was standardized at 34oC. The overall temperature variations in the pulp chamber during the light-activation processes were live recorded using an infrared camera (FLIR ONE PRO, FLIR Systems). The liners and bases evaluated were: Dycal (Dentisply), TheraCal (Bisco), Biodentin (Septodent), Vitrebond (3M/ESPE) and Fuji IX (GC) followed by restoration with a bulk fill composite (Ivoclar Vivadent). Light-polymerization of the materials was carried out with Valo Grand (Ultradent) at 1000 mW/cm2keeping the tip of the device in contact with the tooth surface. The materials used were inserted into the tooth preparation in layers ranging from 0.5 mm (Dycal) to 2 mm. A power analysis was conducted to determine the sample size (N=3) to provide a power of at least 0.8 at a significance level of α=0.05 (β=0.2). Statistical analyses were performed using ANOVA and Tukey’s test for multiple comparison.
Results: The pulp chamber temperature increased above 42.5oC for all light-activated procedures evaluated. For the light-activated liners and base (Theracal and Vitrebond), the temperature reached over 54oC. Neither of the materials added as a second layer was capable of providing thermal insulation for light-activated bonding and restorative procedures (p=0.25). However, the higher the number of procedures requiring light-activation, the longer the pulp temperature remained above 42.5oC.
Conclusions: For direct pulp capping procedures, a reduced number of procedures requiring light-activation should be indicated in order to reduce intrapulpal temperature raising above 42.5oC.
IMAGES
3183101_File000000.jpg
3183101_File000000.jpg