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Grant number: 13/07229-3
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): February 01, 2014
Effective date (End): May 31, 2017
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Duclerc Fernandes Parra
Grantee:Luiza Mello de Paiva Campos
Home Institution: Instituto de Pesquisas Energéticas e Nucleares (IPEN). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil


The matter of polymerization shrinkage in dentistry applications is critical, causing the restoration material to grow distant or detach from the dental cavity walls. The consequent rupture would lead to marginal microleakage which is responsible for additional issues such as secondary caries and post-operative sensibility. The goal of this study is to experimentally develop new composites through the addition of clay mineral (phyllossilicate) nanocomponents into a polymeric matrix composed of BisGMA/TEGMA, so that the possibility of a different shrinkage behavior to take place during polymerization may be evaluated. Also, the performance of three different commercial nanoparticle resins shall be assessed. The materials to be added to the polymeric matrices are clay mineral nanoparticles MMT Cloisite 20A® and Cloisite 302B® (with weight fractions of 50, 60 and 70%). The commercial resins to be tested are Filtek Z350 XT (3M ESPE), Evolu-X (Dentsply) and Carisma Diamond (Heraeus Kulzer). The characterization methods shall be scanning electron microscopy (SEM), Thermomechanical Analysis (TMA), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Fourrier-Transform Infra-Red Spectroscopy (FTIR), X-Ray Diffraction (XRD), Polymerization Stress Testing, Holographic Interferometry (HI), Digital Holography (DH) and Digital Image Correlation (DIC).

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Scientific publications (7)
(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)
CAMPOS, LUIZA M. P.; BOARO, LETICIA C.; SANTOS, TAMIRIS M. R.; SANTOS, VINICIUS J.; GRECCO-ROMANO, REBECA; SANTOS, MARIANA J.; PARRA, DUCLERC F. Polymerization shrinkage evaluation in experimental dental composite filled with montmorillonite nanoparticles. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, v. 131, n. 1, p. 771-774, JAN 2018. Web of Science Citations: 2.
ESTEVES, RENATA A.; BOARO, LETICIA C. C.; GONCALVES, FLAVIA; CAMPOS, LUIZA M. P.; SILVA, CECY M.; RODRIGUES-FILHO, LEONARDO ELOY. Chemical and Mechanical Properties of Experimental Dental Composites as a Function of Formulation and Postcuring Thermal Treatment. BIOMED RESEARCH INTERNATIONAL, 2018. Web of Science Citations: 2.
GONCALVES, FLAVIA; DE PAIVA CAMPOS, LUIZA MELLO; RODRIGUES-JUNIOR, EZEQUIAS COSTA; COSTA, FABRICIA VIANA; MARQUES, PAMELA ADELINE; FRANCCI, CARLOS EDUARDO; BRAGA, ROBERTO RUGGIERO; CIDREIRA BOARO, LETICIA CRISTINA. A comparative study of bulk-fill composites: degree of conversion, post-gel shrinkage and cytotoxicity. Brazilian Oral Research, v. 32, p. -, 2018. Web of Science Citations: 10.
CAMPOS, L. M. P.; ZAHARESCU, T.; BOARO, L. C.; SANTOS, L. K. G.; SANTOS, T. M. R.; FERREIRA, H. P.; PARRA, D. F. Thermal and mechanical behavior evaluation of dental composites filled with irradiated montmorillonite. Journal of Applied Polymer Science, v. 134, n. 29 AUG 5 2017. Web of Science Citations: 1.
CAMPOS, LUIZA M. P.; BOARO, LETICIA C.; SANTOS, TAMIRIS M. R.; MARQUES, PAMELA A.; ALMEIDA, SONIA R. Y.; BRAGA, ROBERTO R.; PARRA, DUCLERC F. Evaluation of flexural modulus, flexural strength and degree of conversion in BISGMA/TEGDMA resin filled with montmorillonite nanoparticles. JOURNAL OF COMPOSITE MATERIALS, v. 51, n. 7, p. 927-937, MAR 2017. Web of Science Citations: 5.
DE PAIVA CAMPOS, LUIZA MELLO; CIDREIRA BOARO, LETICIA; PEREZ FERREIRA, HENRIQUE; GOMES DOS SANTOS, LETICIA KARINE; RIBEIRO DOS SANTOS, TAMIRIS; FERNANDES PARRA, DUCLERC. Evaluation of polymerization shrinkage in dental restorative experimental composites based: BisGMA/TEGDMA, filled with MMT. Journal of Applied Polymer Science, v. 133, n. 24 JUN 20 2016. Web of Science Citations: 2.
CAMPOS, L. M. P.; BOARO, L. C.; SANTOS, L. K. G.; PARRA, D. F.; LUGAO, A. B. Influence of ionizing radiation on the mechanical properties of BisGMA/TEGDMA based experimental resin. Radiation Physics and Chemistry, v. 115, p. 30-35, OCT 2015. Web of Science Citations: 6.

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