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Photoelastic stress analysis for internal hex connection implants/UCLA abutments under static occlusal loading schemes.

Grant number: 08/06960-8
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2009
Effective date (End): January 31, 2010
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Renata Cristina Silveira Rodrigues Ferracioli
Grantee:Fabio Afrânio de Aguiar Junior
Home Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


Since when the implant-supported prostheses became another option for partially or complete edentulous patients' rehabilitation, at the end of the 60´s, the demand for these type of prostheses has been increasing. Several restoration options exist when multiple implants are closely positioned and also with the presence or absence of subsequent abutments. Small movements of the fastened implant and excessive tensions at the bone-implant interface were suggested as the causes of the peri-implant bone resorption and the consequent flaw of the restorative treatment. This bone biological answer to the mechanical loads generated to the implants affects his longevity, and the generation of these loads suffers direct influence of factors as the type of employed restorative material, number, distribution and position of the implants in the arch, and occlusion. The photoelastic analysis is an experimental technique for tension analysis, extensively employed due to its relative simplicity and reliability as for the clinical correspondence of the observed discoveries. Consensus doesn't exist in the literature relative to the best prosthetic planning for partial rehabilitations with multiples adjacent implants, in order to minimize the tensions generated in the bone-implant interface. The present study aims to evaluate the distribution and magnitude of tensions generated by static occlusal load on internal hex connection implant/UCLA abutments by photoelastic stress analysis. For this, screwed or cemented prostheses, with the presence or absence of distal tooth to the implants will be used.

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)
DE AGUIAR JUNIOR, FABIO AFRANIO; TIOSSI, RODRIGO; MACEDO, ANA PAULA; CHIARELLO DE MATTOS, MARIA DA GLORIA; RIBEIRO, RICARDO FARIA; SILVEIRA RODRIGUES, RENATA CRISTINA. Importance of a distal proximal contact on load transfer by implant-supported single adjacent crowns in posterior region of the mandible: a photoelastic study. Journal of Applied Oral Science, v. 21, n. 5, p. 397-402, Set. 2013. Web of Science Citations: 0.
DE AGUIAR, JR., FABIO AFRANIO; TIOSSI, RODRIGO; MACEDO, ANA PAULA; CHIARELLO DE MATTOS, MARIA DA GLORIA; RIBEIRO, RICARDO FARIA; SILVEIRA RODRIGUES, RENATA CRISTINA. Photoelastic Analysis of Stresses Transmitted by Universal Cast to Long Abutment on Implant-Supported Single Restorations Under Static Occlusal Loads. JOURNAL OF CRANIOFACIAL SURGERY, v. 23, n. 1, p. 2019-2023, NOV 2012. Web of Science Citations: 6.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
JUNIOR, Fabio Afrânio de Aguiar. Análise fotoelástica das tensões geradas por coroas unitárias sobre implantes adjacentes na região posterior da mandíbula. Efeito de sistemas de retenção e materiais de revestimento estético. 2010. Master's Dissertation - Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto Ribeirão Preto.

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