Selective Removal of Necrotic Dentin in Primary Teeth Using Laser Irradiation: One-Year Clinical Evaluation of Composite Restorations

Author(s)

Fernandes Polizeli, Silvana Aparecida ^[1] ; Curylofo-Zotti, Fabiana Almeida ^[2] ; Valerio, Rodrigo Alexandre ^[1] ; Nemezio, Mariana Alencar ^[1] ; Souza-Gabriel, Aline Evangelista ^[2] ; Borsatto, Maria Cristina ^[1] ; Milori Corona, Silmara Aparecida ^[2]

Affiliation

^[1] Univ Sao Paulo, Ribeirao Preto Sch Dent, Clin Pediat Dent Dept, Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Ribeirao Preto Sch Dent, Restorat Dent Dept, Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF LASERS IN MEDICAL SCIENCES; v. 10, n. 2, p. 108-116, SPR 2019.
• Web of Science Citations: 0

Abstract

Introduction: This study aimed to evaluate the child's salivary cortisol levels, clinical performance and marginal adaptation of restorations after selective removal of necrotic dentin in primary teeth using Er: YAG laser irradiation. Methods: A double-blind clinical study was performed in children at 7-10 years. Children who had at least 2 teeth with carious lesions involving the occlusal and proximal surfaces of primary molars counterparts were selected. Removal of necrotic dentin was performed by 2 methods: Er: YAG laser irradiation and bur-preparation. Cortisol levels (n =24) was evaluated by ELISA. Clinical analysis (n = 20) was performed after the restorations polish, 6 and 12 months after restorative procedure using United States Public Health Service (USPHS) method and photographs. Scanning electron microscopy (SEM) was used to analyz the marginal gap formation (n =20). The analysis of the data was performed by 95% confidence interval, Shapiro-Wilk test, Friedman and Wilcoxon post hoc tests (alpha = 5%). Results: Cortisol levels were higher during selective removal of necrotic dentin, regardless of the method used (P > 0.05). After 12 months, there was no evidence of the difference in the restorations performed on cavities prepared by both methods. SEM analysis revealed that the laser-irradiated teeth showed 10% of gaps in the full extent of restoration. For bur-prepared teeth, 20% of gaps were found at the cavosurface margin. Conclusion: The salivary cortisol levels on children that received Er: YAG laser irradiation for removal the necrotic dentin was similar to the control group. Class II restorations evaluated after 1 year period did not suffer interference by the use of Er: YAG laser irradiation. (AU)

• FAPESP's process: 14/07942-4 - 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
• Grantee: Silmara Aparecida Milori Corona
• Support Opportunities: Regular Research Grants