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Mechanical behavior, bond strength and reliability of YTZP abutments and crowns processed by CAD-CAM: the role of surface treatments

Grant number: 12/08530-6
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2012
Effective date (End): November 30, 2013
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Ricardo Faria Ribeiro
Grantee:Talita Souza Dantas
Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


The use of high-strength zirconium oxide ceramics by means of CAD-CAM has been the focus for both conventional and restorative approaches to manufacture components for implanted devices. The aim of this study is to evaluate the bond strength of high-strength zirconium oxide ceramics after different surface treatments and to evaluate the mechanical behavior of ceramic abutments and crowns associated with these treatments. In the first phase 95 zirconia discs will be made through NEOSHAPE system divided into five groups (n = 19), according to surface treatment: G1 (control group without any treatment), G2 (sandblasting with Al2O3 particles before sintering), G3 (sandblasting with Al2O3 particles after sintering), G4 (silanization with Siloc system before sintering) and G5 (silanization with Siloc system after sintering). Three samples of each group will be prepared for microstructural analysis by SEM. Ten samples of each group will be subjected to testing micro shear and the other remaining six will have their interface examined by SEM. In the second stage, 70 hexagonal abutments will also be made by NEOSHAPE system and associated with zirconia crowns in which the infrastructure will be also obtained through the NEOSHAPE system. The joint implant-abutment-crown will also be divided into five groups (n = 14) and underwent the same treatments as previously described. Will still be performed measurements to verify the adaptation of crowns on the abutments and mechanical fatigue test set. (AU)

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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)
DANTAS, TALITA SOUZA; SILVEIRA RODRIGUES, RENATA CRISTINA; NAVES, LUCAS ZAGO; LAPRIA FARIA, ADRIANA CLAUDIA; PALMA-DIBB, REGINA GUENKA; RIBEIRO, RICARDO FARIA. Effects of Surface Treatments on Mechanics Behavior of Sintered and Pre-sintered Yttria-Stabilized Zirconia and Reliability of Crowns and Abutments Processed by CAD/CAM. INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS, v. 34, n. 4, p. 907-919, . (12/08530-6)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
DANTAS, Talita Souza. Mechanical behavior, bond strength and reliability of YTZP abutments and crowns processed by CAD/CAM: The role of surface treatments. 2015. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto (PCARP/BC) Ribeirão Preto.

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