Caries removal using Er:YAG laser: anxiety evaluation, longitudinal evaluation of restorations, marginal adaptation of replica of restoration, microhardness adjacent to restorations and adhesive interface analysis

• Grant number: 14/07942-4
• Support Opportunities: Regular Research Grants
• Start date: November 01, 2014
• End date: October 31, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Silmara Aparecida Milori Corona
• Grantee: Silmara Aparecida Milori Corona
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
• Associated researchers: Aline Evangelista de Souza Gabriel ; Maria Cristina Borsatto ; Silvana Aparecida Fernandes Polizeli

Abstract

Minimally invasive dentistry recommends preparation of dental cavities that remove smaller amount of healthy tooth substrate associated with the use of adhesive materials, in order to offer more comfort and less anxiety. The purpose of this study is to evaluate child anxiety during selective removal of caries using Er: YAG laser, then analyze restorations longitudinally, evaluate marginal adaptation of the replica of the restoration, microhardness adjacent to restorations and adhesive interface. Will be selected a total of 40 children, aged between 7 and 9 years, who have at least two active caries lesions located in occlusal and proximal dentin surfaces (class II cavities) of homologous primary molars. The teeth of each child will be randomly assigned into two groups: 1) Er: YAG laser (250mJ/4 Hz) and 2) Conventional method (low-speed handpiece). The level of cortisol hormone will be evaluated using immunoenzymatic analysis of saliva at four moments: 7 days before procedures, in the day of clinical consultation, during the removal of caries lesions and after completion of the procedures.. Prepared cavities will receive adequate pulp protection and will be restored using restorative system Adper Single Bond 2 + Filtek Supreme (3M). Clinical evaluation of restorations will be performed by three calibrated and experienced professionals using the modified U.S. Public Health Service criteria (USPHS) and radiographic examination in the immediate period, 6 months and 1 year after completed treatment. Marginal adaptation of replica of restoration will be analyzed by scanning electron microscopy, and then the percentage of marginal integrity will be evaluated in the same periods proposed for clinical analysis. Exfoliated deciduous teeth will be subjected to microhardness analysis adjacent to restorations and by scanning electron microscopy a qualitative evaluation of adhesive interface will be performed. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FERNANDES POLIZELI, SILVANA APARECIDA; CURYLOFO-ZOTTI, FABIANA ALMEIDA; VALERIO, RODRIGO ALEXANDRE; NEMEZIO, MARIANA ALENCAR; SOUZA-GABRIEL, ALINE EVANGELISTA; BORSATTO, MARIA CRISTINA; MILORI CORONA, SILMARA APARECIDA. Selective Removal of Necrotic Dentin in Primary Teeth Using Laser Irradiation: One-Year Clinical Evaluation of Composite Restorations. JOURNAL OF LASERS IN MEDICAL SCIENCES, v. 10, n. 2, p. 108-116, SPR 2019. (14/07942-4)