IADR Abstract Archives
Evaluation of pH Fluoride and Calcium Release for Dental Materials
Objectives: The objective of this study was to evaluate fluoride and calcium ion release and pH for new and current dental materials in artificial saliva over three weeks.
Methods: Twenty-four disc-shaped samples (n=6/gp) were made for each cement materials (ACTIVA, Filtek, EQUIA Forte, and Ketac Fil), stored in D-PBS media (37°C, 21d), measured (F-, Ca+2, and pH) and compared statistically analyzed (Two-way RM ANOVA, SNK p<0.05). Each sample’s solution was divided into three separate containers for measurements. Measurements made with probes each day after appropriate calibration, D-PBS solution replaced to each sample for next time point.
Results: Fluoride ion release for EQUIA Forte showed the largest amount of fluoride initially (9.0mg/L) then declining release to 3.9mg/L. The other three materials maintained a balanced release in the range of 0-3mg/L over time. Calcium ion release showed greater variance with ACTIVA releasing the most ions into solution, with an initial ion value of 25.1mg/L and maintaining 17.0mg/L at 21days. Filtek had a similar pattern starting initially at 24.3mg/L and declining to 2.5mg/L at 21days. EQUIA Forte and Ketac Fil sustained concentration range in the 15 to 5mg/L over the course of 21days. ACTIVA and Filtek retained a more neutral pH initially and then tapering off slightly below seven at 14 and 21days. The EQUIA Forte and Ketac Fil materials maintained a slightly acidic pH of 6.5 to 6.7 initially and moving a bit to 6.75 at 7days and remaining there for there for the duration.
Conclusions: ACTIVA’s pH maintained a neutral and consistent level over the time period while the other materials were more variable. Calcium release for ACTIVA may suggest an ability to promote tooth remineralization. The fluoride release is low but present in solution, the fluoride uptake needs investigation of understand the prevention fully.
Methods: Twenty-four disc-shaped samples (n=6/gp) were made for each cement materials (ACTIVA, Filtek, EQUIA Forte, and Ketac Fil), stored in D-PBS media (37°C, 21d), measured (F-, Ca+2, and pH) and compared statistically analyzed (Two-way RM ANOVA, SNK p<0.05). Each sample’s solution was divided into three separate containers for measurements. Measurements made with probes each day after appropriate calibration, D-PBS solution replaced to each sample for next time point.
Results: Fluoride ion release for EQUIA Forte showed the largest amount of fluoride initially (9.0mg/L) then declining release to 3.9mg/L. The other three materials maintained a balanced release in the range of 0-3mg/L over time. Calcium ion release showed greater variance with ACTIVA releasing the most ions into solution, with an initial ion value of 25.1mg/L and maintaining 17.0mg/L at 21days. Filtek had a similar pattern starting initially at 24.3mg/L and declining to 2.5mg/L at 21days. EQUIA Forte and Ketac Fil sustained concentration range in the 15 to 5mg/L over the course of 21days. ACTIVA and Filtek retained a more neutral pH initially and then tapering off slightly below seven at 14 and 21days. The EQUIA Forte and Ketac Fil materials maintained a slightly acidic pH of 6.5 to 6.7 initially and moving a bit to 6.75 at 7days and remaining there for there for the duration.
Conclusions: ACTIVA’s pH maintained a neutral and consistent level over the time period while the other materials were more variable. Calcium release for ACTIVA may suggest an ability to promote tooth remineralization. The fluoride release is low but present in solution, the fluoride uptake needs investigation of understand the prevention fully.