Evaluation of the microhardness of enamel affected by incipient caries and treated by two types of fluoride varnishes: In vitro study

Fluoride has shown its effectiveness in the therapy of initial lesions of caries. Currently, there are new fluoride varnishes with additional remineralizing agents, to treat lesions of non-cavitated caries in a non-invasive way, promoting the remineralization of the enamel. Objective: To determine the microhardness of enamel with incipient caries lesions treated with two fluoride varnishes. Materials and methods: In vitro experimental study. The sample consisted of 35 enamel blocks, which were randomly divided into 3 groups. G1 (n=5): negative control; G2 (n=15): Fluorine varnish (Flúor protector - Ivoclar Vivadent) and G3 (n=15): Fluorine varnish with Tricalcium Phosphate (Clinpro White Varnish - 3M ESPE). Three indentations were made by means of a microhardness meter, in order to obtain the initial hardness, then the samples were demineralized with the purpose of producing incipient lesions, where 3 indentations were made again to obtain the microhardness of the demineralized enamel, after this phase the remineralizing solution in each sample and a cyclical pH regime was followed during 7 days to simulate the oral conditions, after this period 3 indentations were made in each sample to obtain the final hardness of the remineralized enamel, reaching a total of 9 indentations per sample. The data were analyzed using the Scheffé test and the Student’s T test with a level of significance of 5%. Results: There was a significant difference between the fluoride varnish with Tricalcium Phosphate (TCP) and the control group (p=0.03). No significant differences were found between the different fluorinated varnishes (p=0.09). A significant improvement of the microhardness after treatment of both fluoride varnishes was observed (p<0.001). Conclusion: The two types of fluoride varnishes efficiently increased the microhardness of enamel with incipient caries lesion, without significant difference between these two.

• Главный автор: Granda Untuña, William Omar (author)
• Другие авторы: Quezada Conde, Maritza del Carmen (author)
• Формат: article
• Язык: spa
• Опубликовано: 2018
• Предметы: Dentición permanente; caries dental; flúor; esmalte dental; Permanent dentition; dental caries; fluorine; dental enamel
• Online-ссылка: https://revistadigital.uce.edu.ec/index.php/odontologia/article/view/1074