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Analysis of misfit and torque loss after thermomechanical cycling and fracture resistance of zirconia abutments for morse cone implants.

Grant number: 12/00407-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): January 01, 2013
Effective date (End): March 31, 2015
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Renata Cristina Silveira Rodrigues Ferracioli
Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


The loss of teeth, with functional and esthetic impairment, makes professionals and patients seek alternatives to replace them. Therefore, dental implants have become a viable treatment option in order to obtain adequate oral rehabilitation. The main factors of failures of this type of treatment are: marginal bone loss and instability of the prosthetic connection. Thus, morse taper interfaces were developed to improve some properties of these implants such as improving the fit between the implant and prosthetic abutment, minimize peri-implant bone resorption; improve the mechanical stability and prevent loosening of the abutment. Actually, aesthetic has become an aspect of great importance in dentistry, and abutments of zirconia are an interesting option to overcome aesthetic requisites, not provided by metallic abutments. Studies evaluating fit and strength of aesthetic abutments have increased, but many studies evaluated aesthetic abutments for external and internal hex interface implants, and there is little information about the biomechanical behavior of aesthetic abutments of zirconia for morse taper implants. This study aims to evaluate the fracture resistance and the effect of mechanical cycling associated to thermal cycling on aesthetic abutments of zirconia for morse taper implants, with and without prosthetic preparation.

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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)
MAURICIO MORIS, IZABELA CRISTINA; CHEN, YUNG-CHUNG; LAPRIA FARIA, ADRIANA CLAUDIA; RIBEIRO, RICARDO FARIA; FOK, ALEX SUI-LUN; SILVEIRA RODRIGUES, RENATA CRISTINA. Fracture loads and failure modes of customized and non-customized zirconia abutmentsIzabela. Dental Materials, v. 34, n. 8, p. E197-E204, . (12/00407-0, 10/20632-3)
MAURICIO MORIS, IZABELA CRISTINA; LAPRIA FARIA, ADRIANA CLAUDIA; RIBEIRO, RICARDO FARIA; FOK, ALEX SUI-LUN; SILVEIRA RODRIGUES, RENATA CRISTINA. Custom Morse taper zirconia abutments: Influence on marginal fit and torque loss before and after thermomechanical cycling. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 78, p. 241-245, . (12/00407-0, 10/20632-3)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
RIVERA, IZABELA CRISTINA MAURICIO MORIS. In vitro biomechanical analysis of customized and not customized aesthetic zircônia abutment. 2015. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto (PCARP/BC) Ribeirão Preto.

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