Effect of ageing on the mechanical properties of dental resin with and without Bisphenol A
Anfitriã: Rosiane Sperb (Doutoranda em Ciências Biomédicas no IUCS-CESPU)
Palestrante: Lígia Rocha
Afiliação: UNIPRO – Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Gandra Campus, Paredes, 4585-116, Rua Central de Gandra, 1317, 4585-116- Gandra PRD, Portugal.
02 de maio | 12h
Campus Universitário de Gandra | Ed. 2 | Sala 2203
ENTRADA LIVRE
Resumo:
Objectives. The work aims to determine the chemical and mechanical properties of different with and without BPA dental resin-matrix composites having different organic matrices, filler loading, and filler types under the same curing and testing conditions. Methods. Discs-shaped specimens were prepared from six resin-matrix composites used in dentistry, three with BPA (Brilliant EverGlowTM, IPS Empress Direct, FiltekTM Supreme XTE) and three without (Admira Fusion, Enamel Plus HRi Bio Function Enamel, N/C). The chemical properties (water sorption and solubility) and mechanical (compressive strength, strain, Young's modulus, biaxial strength, and Knoop hardness) were analyzed. Results. There are no significant differences between the mechanical properties of the resins containing BPA in their composition and those free of this monomer and its derivatives. According to all the parameters studied, we verified that the Enamel Plus HRi Bio Function Enamel is the one that presents the best chemical mechanical behaviour. Significance. The inorganic matrix may have more influence than the organic matrix in the parameters studied, where BPA and its derivatives are found in its composition.
Nota Biográfica:
Lígia Lopes-Rocha DMD, MSci, PgD, PhD. She is a teacher and researcher at the IUCS-CESPU, Portugal. She obtained her PhD in Minimal invasive and aesthetic rehabilitation of maxillary lateral incisor agenesis: chemical-mechanical behaviour. (Biomedical Sciences) (2023; IUCS-CESPU, Portugal). She has a multidisciplinary education with an integrated master's degree in Dentistry (2012; IUCS-CESPU, Portugal); and a Diploma in Esthetic Dentistry in collaboration with Plénido Dental School (Postgraduate Certificate- 2013, Barcelona). She has been an invited auxiliary professor at the IUCS-CESPU since 2023, in the conservative dentistry department. Her teaching activity also extends as a Guest Lecturer to the Post-Graduate Course in Adhesive Dentistry and the Postgraduate Course in Endodontics, at the IUCS-CESPU. She developed her activity as a researcher in collaboration with the IINFACTS- Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Portugal (2015-2020), the UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS-CESPU, Portugal), and the Advanced Joining Processes Unit (AJPU) of the Institute of Science and Innovation in Mechanical Engineering and Industrial Engineering (INEGI). She co-authored several articles mainly related to bisphenol A; oral rehabilitation; adhesion; composite resins; dental ceramics; esthetic dentistry; and digital dentistry. She has a private Dental Medicine practice (DMD) mainly in aesthetic restorative dentistry.
