LOW INTENSITY LIGHT-CURING UNITS AND PHOTOINITIATION SYSTEMS ACTIVATED UNDER WAVELENGHS IN BETWEEN 495-750 NM FOR DENTAL RESIN MATERIALS

• Grant number: 16/05823-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: August 01, 2016
• End date: July 31, 2019
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Mário Alexandre Coelho Sinhoreti
• Grantee: Dayane Carvalho Ramos Salles de Oliveira
• Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil
• Associated scholarship(s): 17/22161-7 - Development and characterization of dental resin materials photoactivated under WAVELENGHS between 495 and 750 nm, BE.EP.PD

Abstract

Aim: Development of low intensity dental light-curing units and photoinitiatior systems activated under their wavelengths (from 495 to 750 nm) for use in resin materials. Material and Methods: Model resin-based matrix will be mechanically blended. To this matrix, different amounts of filler particles will be added (0wt%, 10wt%, 50wt% and 70wt%). Alternative photoinitiatior systems activated under low light intensity will be compared to the conventional system using camphorquinone and reducing agent activated under high light intensity. Chemical structure and molecular weight of each synthetized photoinitiatior system will be characterized by elementary analysis, nuclear magnetic resonance and spectral and molar absorbance by UV-Vis absorption spectrophotometry. Irradiation and spectral emittance of each light-curing unit developed will be characterized by spectrometry. Each developed material will be submitted to a cytotoxicity test to evaluate its biocompatibility; Infrared spectroscopy to evaluate cure efficiency and ISO 4049 to evaluate depth of cure. Finally, the temperature increase at the light guide tip and at the pulpal floor during a restorative procedure will be evaluated during the photoactivation process using each light-curing unit. Data will be statistically analyzed with significance level at 5%.

Scientific publications

(10)

(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)

JAMILLE FAVARÃO; DAYANE CARVALHO RAMOS SALLES DE OLIVEIRA; MATEUS GARCIA ROCHA; MAURÍCIO MATTÉ ZANINI; GABRIEL FLORES ABUNA; MARCIO JOSÉ MENDONÇA; MÁRIO ALEXANDRE COELHO SINHORETI. Solvent Degradation and Polymerization Shrinkage Reduction of Resin Composites Using Isobornyl Methacrylate. Brazilian Dental Journal, v. 30, n. 3, p. 272-278, 2019-06-03. (16/06019-3, 16/05823-3, 17/22161-7, 17/22195-9)

DE OLIVEIRA, D. C. R. S.; ROCHA, M. G.; CORRER, A. B.; FERRACANE, J. L.; SINHORETI, M. A. C.. Effect of Beam Profiles From Different Light Emission Tip Types of Multiwave Light-emitting Diodes on the Curing Profile of Resin-based Composites. Operative Dentistry, v. 44, n. 4, p. 365-378, JUL-AUG 2019. (17/22195-9, 16/06019-3, 16/05823-3, 14/03028-6, 17/22161-7, 13/04241-2)

FAVARAO, J.; OLIVEIRA, D. C. R. S.; ZANINI, M. M.; ROCHA, M. G.; CORRER-SOBRINHO, L.; SINHORETI, M. A. C.. Effect of curing-light attenuation on color stability and physical and chemical properties of resin cements containing different photoinitiators. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 113, JAN 2021. (17/22161-7, 17/22195-9, 16/06019-3, 16/05823-3)

LARA, LUCAS; ROCHA, MATEUS GARCIA; DE MENEZES, LIVIA RODRIGUES; CORRER, AMERICO BORTOLAZZO; COELHO SINHORETI, MARIO ALEXANDRE; OLIVEIRA, DAYANE. Effect of combining photoinitiators on cure efficiency of dental resin-based composites. Journal of Applied Oral Science, v. 29, p. 1-9, 2021. (17/22161-7, 17/22195-9, 16/06019-3, 16/05823-3)

ROCHA, MATEUS GARCIA; DE OLIVEIRA, DAYANE CARVALHO RAMOS SALLES; DE MENEZES, LIVIA RODRIGUES; ROULET, JEAN-FRANCOIS; SINHORETI, MARIO ALEXANDRE COELHO; CORRER, AMERICO BORTOLAZZO. he use of an elastomeric methacrylate monomer (Exothane 24) to reduce the polymerization shrinkage stress and improve the two-body wear resistance of bulk fill composite. Dental Materials, v. 38, n. 2, p. E43-E57, FEB 2022. (17/22195-9, 16/05823-3, 17/22161-7)

FAVARAO, JAMILLE; RAMOS SALLES DE OLIVEIRA, DAYANE CARVALHO; ZANINI, MAURICIO MATTE; ROCHA, MATEUS GARCIA; OGLIARI, FABRICIO AULO; CORRER-SOBRINHO, LOURENCO; COELHO SINHORETI, MARIO ALEXANDRE. Effect of light attenuation through veneers on bond strength of adhesives with photoinitiator combinations. BRAZILIAN ORAL RESEARCH, v. 36, p. 15-pg., 2022-01-01. (17/22195-9, 16/06019-3, 17/22161-7, 16/05823-3)

JAMILLE FAVARÃO; DAYANE CARVALHO RAMOS SALLES DE OLIVEIRA; MAURICIO MATTÉ ZANINI; MATEUS GARCIA ROCHA; FABRÍCIO AULO OGLIARI; LOURENÇO CORRER-SOBRINHO; MÁRIO ALEXANDRE COELHO SINHORETI. Effect of light attenuation through veneers on bond strength of adhesives with photoinitiator combinations. Brazilian Oral Research, v. 36, 2022-06-10. (16/06019-3, 16/05823-3, 17/22161-7, 17/22195-9)

DELGADO, A. J.; CASTELLANOS, E. M.; SINHORETI, M. A. C.; OLIVEIRA, D. C.; ABDULHAMEED, N.; GERALDELI, S.; SULAIMAN, T. A.; ROULET, J-F. The Use of Different Photoinitiator Systems in Photopolymerizing Resin Cements Through Ceramic Veneers. Operative Dentistry, v. 44, n. 4, p. 396-404, JUL-AUG 2019. (16/05823-3)

CASTELLANOS, MAURICIO; DELGADO, ALEX JOSE; COELHO SINHORETI, MARIO ALEXANDRE; RAMOS SALLES DE OLIVEIRA, DAYANE CARVALHO; ABDULHAMEED, NADER; GERALDELI, SAULO; ROULET, JEAN-FRANCOIS. Effect of Thickness of Ceramic Veneers on Color Stability and Bond Strength of Resin Luting Cements Containing Alternative Photoinitiators. Journal of Adhesive Dentistry, v. 21, n. 1, p. 67-76, JAN-FEB 2019. (16/05823-3)

ROCHA, M. G.; DE OLIVEIRA, D. C. R. S.; SINHORETI, M. A. C.; ROULET, J. F.; CORRER, A. B.. The Combination of CQ-amine and TPO Increases the Polymerization Shrinkage Stress and Does Not Improve the Depth of Cure of Bulk-fill Composites. Operative Dentistry, v. 44, n. 5, p. 499-509, SEP-OCT 2019. (17/22161-7, 16/05823-3, 17/22195-9)