IADR Abstract Archives
Effect of BAG-Containing Orthodontic Bracket Adhesive on pH in Vitro
Objectives: The acid-neutralizing effect of two novel bioactive glass (BAG) bonds at 40% filler load concentration were measured and compared to a commercially available orthodontic adhesive.
Methods: Two simulated body fluid (SBF) solutions were titrated to pH 7.42 and pH 4.15. 10x1mm cylindrical discs were made using TransBond XT (3M, Minneapolis, MN), 40% 65 BAG-Bond, and 40% 85 BAG-Bond. The molds containing adhesive were compressed between glass slides and light cured for 20s on each side using a Valo Grand Corded LED curing light (Ultradent Products Inc., South Jordan, UT). Ten samples of each material were suspended in 3mL SBF 4.15 and SBF 7.42 at 37°C (n=10/group). The pH was measured at 24 and 100hr using an Orion Star A214 pH/ISE meter (Fisher Scientific, Waltham, MA). Data was collected and analyzed using ANOVA and Tukey Test.
Results: At 24h, both BAG-Bonds showed statistically significant increases (p<0.05) in pH when placed in SBF 4.15 compared to TransBond XT. At 100h, both BAG-Bonds showed statistically significant increases in pH when placed in SBF 4.15 and SBF 7.42, compared to TransBond XT.
Conclusions: Both BAG-Bonds (40% 65 BAG-Bond and 40% 85 BAG-Bond) showed significant acid-neutralizing ability when compared to a commercially available orthodontic adhesive (TransBond XT). Future studies measuring filler load concentration effects and other mechanical properties are needed to understand these novel materials use as orthodontic adhesives.
Methods: Two simulated body fluid (SBF) solutions were titrated to pH 7.42 and pH 4.15. 10x1mm cylindrical discs were made using TransBond XT (3M, Minneapolis, MN), 40% 65 BAG-Bond, and 40% 85 BAG-Bond. The molds containing adhesive were compressed between glass slides and light cured for 20s on each side using a Valo Grand Corded LED curing light (Ultradent Products Inc., South Jordan, UT). Ten samples of each material were suspended in 3mL SBF 4.15 and SBF 7.42 at 37°C (n=10/group). The pH was measured at 24 and 100hr using an Orion Star A214 pH/ISE meter (Fisher Scientific, Waltham, MA). Data was collected and analyzed using ANOVA and Tukey Test.
Results: At 24h, both BAG-Bonds showed statistically significant increases (p<0.05) in pH when placed in SBF 4.15 compared to TransBond XT. At 100h, both BAG-Bonds showed statistically significant increases in pH when placed in SBF 4.15 and SBF 7.42, compared to TransBond XT.
Conclusions: Both BAG-Bonds (40% 65 BAG-Bond and 40% 85 BAG-Bond) showed significant acid-neutralizing ability when compared to a commercially available orthodontic adhesive (TransBond XT). Future studies measuring filler load concentration effects and other mechanical properties are needed to understand these novel materials use as orthodontic adhesives.