ABSTRACT
Objective: Tooth surface undergoes continuous remineralization and demineralization. The aim of this study was to compare the effect of Caseinphosphopeptide-amorphous calcium phosphate [CPPACP] paste and Fluoride gel on the microhardness of demineralized enamel lesions
Methods: Frothy eight specimens of premolar teeth were chosen and randomly divided to 4 groups of 12. After the initial measurement of micro-hardness the specimens were immersed in demineralizing solution for 4 day and then the measurements were recorded again. Two groups [GL and G3] were treated with CPP-ACP and Fluoride gel respectively according to manufacturer's instruction. Two other groups [G2 and G4] were treated with CPP-ACP and fluoride gel every week for three months. After the treatments all specimens were taken into PH-cycling and the microhardness for each one were measured again. For data analysis, the Repeated Measures ANOVA test and the LSD tests were performed. In each group the percentage of micro-hardness recovery was measured
Results: Repeated Measures ANOVA and LED Test showed that the mean value of hardness was significantly decreased after demineralization in all groups [p=0.01]. There was no significant difference in mean hardness value in groups [GL, G3] after treatment [p=0.1, p=0.12] In groups [G2, G4] the mean hardness value were significantly increased [p<0.0001, p=0.1]. It is noticeable that the CPP-ACP was significantly more efficient than the fluoride gel
Conclusion: CPP-APC paste and fluoride gel both increase the micro-hardness of enamel when administrated for long time and repeated application
ABSTRACT
Objective: This study aimed to compare the effect of using Casein phosphopeptide - amorphous calcium phosphate [CPP-ACP] paste, Remin-Pro and Fluoride Varnish on remineralization of enamel lesions
Methods: In this experimental-in vitro study, 60 intact premolars and molars were used and flat enamel surfaces were prepared. The specimens were divided into 6 groups [N=10]. After primary DIAGNOdent value measurement and a four-day immersion in demineralizing solution, the DIAGNOdent value were measured. Groups 1, 2 and 3 were treated by Fluoride varnish, CPP-ACP and Remin-Pro respectively, according to the manufacturer instruction and their DIAGNOdent value was read. Groups 4, 5, and 6 were treated by Fluoride varnish, CPP-ACP and Remin-Pro for 1 month [8 hours a day], respectively, and their DIAGNOdent value was measured. Then the specimens of these three groups were demineralized and pH cycled and their DIAGNOdent values were recorded. The data were analyzed by One-way analysis of variance [ANOVA] and repeated measures ANOVA
Results: After a one-month treatment, the DIAGNOdent value significantly decreased in groups 4, 5, and 6 in comparison to the manufacturer instruction [p<0.001]. ANOVA test indicated that decrease mean value of DIAGNOdent value was significantly higher for Remin-Pro and CPP-ACP groups than Fluoride varnish group, from entrance time to the study to re-demineralization stage [p<0.001]
Conclusion: All the three materials showed a statistically significant amount of remineralization after repeated application but the CPP-ACP and Remin pro were more resistant to redemineralization and pH cycling
ABSTRACT
Objective: Although the most useful method to reduce mechanical dental plaque is brushing and flossing, but due to the lack of adequate effectiveness achieved by these methods, the use of other methods such as replacing sweeteners, including Xylitol and Sorbitol with sucrose in products such as chewing gums have come into the focus of attention. This research was done aimed at examine the effect of gum types containing Xylitol, Calcium and Xylitol or Sorbitol on dental plaque pH changes
Methods: The study was performed as a randomized, single-blind, cross-over clinical trial on 10 female students with an age range of 20 to 30 years old studying in dental school, Azad University. Plaque pH changes were measured using PH Meter device after taking four types of chewing gums containing Xylitol, Sorbitol, Xylitol+ Calcium, Turpentine and 10% sucrose solution as control in the follow-up periods. To compare pH at any time between different materials, the Cried-mann test was used. For group pair comparison, Wilcoxon-signed rank test and Bone-Serroni-Adjusment test were used
Results: Xylitol had the highest average plaque pH during the period time that pH increase at minute 7 was the maximum, and turpentine had the lowest pH at all moments, which reached to its maximum at minute 2 and showed little change in plaque pH increase up to minute 60. The difference between all four types of materials was significant [p<0.001]
Conclusion: The use of chewing gum after drinking sugar syrup caused a significant plaque pH increase within 7 minutes up to the initial normal level that the effect of Xylitol chewing gum was significantly higher than the rest