|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.