INFLUENCE OF POST-CURING TIME ON THE PHYSICAL AND MECHANICAL PROPERTIES OF 3D PMMA FOR PROVISIONAL CROWNS

• Grant number: 24/22862-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2025
• End date: December 31, 2025
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Mariana Lima da Costa Valente
• Grantee: Isabella Barbieri Guião Cleto
• Host Institution: Universidade de Ribeirão Preto (UNAERP). Campus Ribeirão Preto. Ribeirão Preto , SP, Brazil

Abstract

Temporary prostheses must have satisfactory physical, chemical and mechanical properties for the clinical longevity of rehabilitation treatments. With the increasingly frequent use of additive manufacturing (3D printing) in dentistry, evaluating the properties of resins for printing as a function of different processing parameters is essential for obtaining better results. The aim of this study will be to evaluate the influence of different post-curing times on the physical and mechanical properties of polymethyl methacrylate (PMMA) used in the 3D printing of temporary crowns. The samples, measuring 9 mm in diameter x 2 mm thick, will be obtained using the DLP method: Digital Light Processing with priZma 3D BioProv, a proprietary resin for making provisionals, and will be post-processed at different post-curing times (5, 10 and 15 minutes). Evaluations will be carried out using: (1) degree of conversion (n=3); (2) surface hardness (n=10) and (3) surface roughness (n=10). After checking the distribution of the data, parametric or non-parametric tests will be applied, with a significance level of 5%.