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Effect of temperature, pH and precursors concentrations on the synthesis of DCPD particles and its application on a remineralizing resin composite

Grant number: 20/13983-6
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): December 01, 2020
Effective date (End): November 30, 2023
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Roberto Ruggiero Braga
Grantee:Rafael Bergamo Trinca
Host Institution: Faculdade de Odontologia (FO). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:19/04737-4 - Dentin remineralization with the use of composite containing calcium orthophosphate particles associated with a Polymer-Induced Liquid Precursor (PILP): material development, in vitro and randomized clinical studies, AP.TEM


This project aims to verify the interaction of temperature, pH and precursor concentration in the synthesis by co-precipitation of DCPD particles, and the effect of the particles on the physical-chemical properties of experimental resin composites capable of releasing calcium ions for dental remineralization. In total, eight combinations of temperature, pH and precursor concentration (two levels for each factor) will be evaluated. The particles will be characterized in terms of the calcium orthophosphate phase formed (X-ray diffraction), size (laser scattering), surface area (BET method) and morphology (scanning electron microscopy). Those with smaller size and larger surface area will be ground in a jet mill and characterized again. These particles will be used experimental composites with 40% by volume of particles in different proportions between the barium (reinforcement) and DCPD glasses, which will be evaluated in terms of degree of conversion (near infrared spectroscopy), fracture toughness KIc , single-edge notched beam method) and ion release (coupled plasma optical emission spectroscopy, ICP-OES). Once the normality and homoscedasticity requirements were met, the data resulting from the two-factor variation analysis and Tukey's test (alpha: 5%).

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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)
VILELA, HANDIALLY SANTOS; RODRIGUES, MARCELA CHARANTOLA; FRONZA, BRUNA MARIN; TRINCA, RAFAEL BERGAMO; VICHI, FLAVIO MARON; BRAGA, ROBERTO RUGGIERO. Effect of Temperature and pH on Calcium Phosphate Precipitation. Crystal Research and Technology, v. 56, n. 12, . (20/13983-6, 18/21023-2, 19/04737-4, 19/01701-9)
CAMPOS, AMANDA LOPES; VELA, BEATRIZ FONSECA; BORGES, LINCOLN PIRES SILVA; TRINCA, RAFAEL BERGAMO; PFEIFER, CARMEM SILVIA; BRAGA, ROBERTO RUGGIERO. Compositional boundaries for functional dental composites containing calcium orthophosphate particles. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 144, p. 9-pg., . (21/09297-2, 20/13983-6, 19/04737-4, 21/09657-9)

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