Effect of CPP-ACP paste and fluoride gel
on microhardness of human enamel
surface exposed to a cola drink
Authors :
- Usanee Kallayathi D.D.S.
- Muratha Panich D.D.S., M.S.D., ABOD
- Suchit Poolthong D.D.S., Grad. Dip. (Operative Dentistry), M.Sc., PhD.
Abstract :
Objective The present study aimed to compare protective effects of CPP-ACP paste and fluoride
gel on microhardness of enamel surface eroded by a cola drink and to compare effect of artificial
saliva with CPP-ACP paste or fluoride gel on protective effect of microhardness of enamel surface
eroded by a cola drink
Materials and methods The specimens were prepared from 60 extracted human lower incisors,
randomly divided into 6 groups; 1) CPP-ACP with deionized water 2) CPP-ACP paste with artificial
saliva 3) artificial saliva 4) fluoride gel with deionized water 5) fluoride gel with artificial saliva and
6) deionized water. The microhardness of labial enamel surface of the six groups were measured by a
Vickers microhardness tester with five indentations and interval of 120 μm. Surface microhardness
readings were performed at baseline and after erosion by a cola drink. Data were analyzed by
Paired-Sample T-Test, Two Way ANOVA and One Way ANOVA.
Results After eroded by a cola drink, the enamel hardness significantly decreased in all groups studied.
The hardness values of CPP-ACP paste with artificial saliva group and fluoride gel with artificial
saliva group were higher than others significantly.
Conclusion CPP-ACP paste and fluoride gel can not protect hardness of enamel after eroded by a
cola drink, but CPP-ACP paste with artificial saliva and fluoride gel with artificial saliva can reduce
the degree of demineralization.
(CU Dent J. 2011;34:21-30)
Keywords :
cola drink; CPP-ACP; enamel; fluoride; hardness
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