Full-arch implant-supported Ti-6Al-4V prostheses manufactured by 3D printing and milling techniques: biomechanical, structural and metal/ceramic interface analyses

• Grant number: 19/27541-8
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2020
• End date: December 31, 2022
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Marcelo Ferraz Mesquita
• Grantee: Marcelo Ferraz Mesquita
• Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil

Abstract

The objectives in this study are: (1) To evaluate full-arch maxillary implant-supported frameworks manufacturing technologies in Ti-6Al-4V: milling, Direct Metal Laser Sintering (DMLS) printing, and Electron Beam Melting (EBM) printing. The vertical and horizontal marginal misfit, screw loosening torque, strain on the system will be evaluated for all techniques, before and after post heat-treatment; (2) To evaluate the effects of post heat-treatment on the surface/structure of the samples; (3) To evaluate the effects of conventional and platinum deposition surface treatments, on the surface/structure of the samples; (4) To evaluate metal-ceramic bond strength (ISO 9693- 1), before and after post heat-treatment; (5) To evaluate metal-ceramic bond strength (ISO 9693- 1), before and after: A- surface conventional treatment; and B- platinum deposition. For marginal misfit, screw loosening torque and strain analyses, full-arch implant-supported frameworks will be obtained by using the technologies described above (n=10/group), evaluated before and after post heat-treatment. Specific samples will be used for flexural strength, elastic modulus and Vickers microhardness (n=10/group). For structure/surface analyses (scanning electron microscopy, energy-dispersive spectroscopy, profilometry, surface free energy, and X-ray photoelectron spectroscopy), specific samples will be manufactured (n=10/group). For metal- ceramic bond strength, specific samples will be obtained, according to ISO 9693-1. Data will be submitted to exploratory analysis and appropriated tests will be applied (±=0,05). (AU)