World Journal of Dentistry

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VOLUME 13 , ISSUE 5 ( September-October, 2022 ) > List of Articles


Impact of Fluoride Varnishes on Enamel Surface Microhardness of Primary Teeth: An In Vitro Study

Uthman S Uthman

Keywords : Fluoride varnish, Primary teeth, Surface microhardness, white spot lesion

Citation Information : Uthman US. Impact of Fluoride Varnishes on Enamel Surface Microhardness of Primary Teeth: An In Vitro Study. World J Dent 2022; 13 (5):469-472.

DOI: 10.5005/jp-journals-10015-2059

License: CC BY-NC 4.0

Published Online: 22-07-2022

Copyright Statement:  Copyright © 2022; The Author(s).


Aim: Aim of the current research was performed to assess the outcome of three fluoride varnishes on enamel surface microhardness (SMH) of primary teeth. Materials and methods: A total of 60 primary teeth indicated for extraction were utilized in this research. The specimens were cleaned employing pumice slurry. The specimens were subjected to storage in distilled water having 0.2% thymol for prevention of bacterial growth through the period of the research. A 2 mm by 2 mm window was made on the enamel of the buccal surface, followed by embedding in acrylic with enamel surface exposed. The specimens were then randomly allocated to one of the three investigational groups as follows: group 1- Bifluorid 10® varnish, group 2- Clinpro white varnish, group 3- Fluorprotector varnish. The specimens underwent a pH cycle to replicate laboratory conditions similar to the mouth. And every cycle lasted for 24 hours. The SMH of enamel was gauged prior to treatment at baseline and following pH cycles employing the Vickers microhardness tester. Results: Bifluorid 10® group exhibited a mean SMH of 328.32 ± 0.11, 332.14 ± 0.08 by the Clinpro white, and 331.13 ± 0.06 by the Fluorprotector group at baseline, and there were no significant dissimilarities amid the various varnish groups. Clinpro white exhibited the lowest SMH at 284.02 ± 0.17 in pursuit by Fluorprotector varnish at 268.58 ± 0.10 as well as Bifluorid 10® varnish at 229.86 ± 0.21. There were statistically significant dissimilarities amid the various varnish groups with p < 0.001. Conclusion: The current research, amid its limitations, arrived at a conclusion that various fluoride-containing varnishes had a positive influence on preventing demineralization of primary teeth. However, Clinpro white varnish delineated maximum efficacy in enhancing the resistance of deciduous enamel to acid attacks vs Fluorprotector as well as the Bifluorid 10 fluoride varnish group. Clinical significance: Cycles of demineralization and remineralization occurring in an alternative manner on the surface of enamel lead to dental caries. Varnishes containing fluoride exhibit a dental caries preventive action on the dentition by exerting remineralizing effects. As a result, the enamel becomes unyielding to disintegration by acids. Fluoride varnish is a noninterventional, anticariogenic substance that can be used to manage early childhood caries (ECC).

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