Photoelastic analysis of tension caused by multiple and single implant-supported crowns on posterior mandible areas.

• Grant number: 07/06995-3
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): May 01, 2008
• Effective date (End): November 30, 2010
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Ricardo Faria Ribeiro
• Grantee: Rodrigo Tiossi
• Home Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Several restoration options exist when multiple implants are closely positioned. Due to the difficulty in producing multiple structures that passively fit, some authors suggest that adjacent implants are restored by single crown, minimizing the effects of the tensions generated to the implants. Small movements of the fastened implant and excessive tensions in the interface bone-implant suggest to be the causes of the peri-implant bone resorption and consequent flaw of the treatment. This biological answer of the bone to the mechanical loads generated to the implant affects its longevity, and the generation of these loads are under direct influence of factors as the type of restorative material, number, distribution and position of the implants, and occlusion. The photoelastic analysis is an experimental technique for analysis of tensions, plenty maid due to his/her relative simplicity and reliability as for the clinical correspondence of the observed discoveries. Consensus doesn't exist in the literature as for the best prosthetic planning for partial rehabilitations with multiples adjacent implants, in order to minimize the tensions generated in the interface bone-implant. This work intends to evaluate the tensions produced in the interface bone-implant, with the application of centrical static loads on the structures varying the types of implant-supported prostheses, and analyzing them by photoelastic method. The type of prosthesis that will be appraised include isolated and united multiple prostheses, screwed in, with and without the presence of element dental distal to the implants and still with the variation of the type of aesthetic material, ceramic and resin, used in the covering of the structures.

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)

TIOSSI, RODRIGO; DE TORRES, ERICA M.; RODRIGUES, RENATA C. S.; CONRAD, HEATHER J.; DE MATTOS, MARIA DA GLORIA C.; FOK, ALEX S. L.; RIBEIRO, RICARDO F. COMPARISON OF THE CORRELATION OF PHOTOELASTICITY AND DIGITAL IMAGING TO CHARACTERIZE THE LOAD TRANSFER OF IMPLANT-SUPPORTED RESTORATIONS. JOURNAL OF PROSTHETIC DENTISTRY, v. 112, n. 2, p. 276-284, AUG 2014. Web of Science Citations: 6.

TIOSSI, RODRIGO; LIN, LIANSHAN; CONRAD, HEATHER JOAN; RODRIGUES, RENATA C. S.; HEO, YOUNG CHEUL; CHIARELLO DE MATTOS, MARIA DA GLORIA; FOK, ALEX SUI-LUN; RIBEIRO, RICARDO FARIA. A digital image correlation analysis on the influence of crown material in implant-supported prostheses on bone strain distribution. JOURNAL OF PROSTHODONTIC RESEARCH, v. 56, n. 1, p. 25-31, JAN 2012. Web of Science Citations: 12.

TIOSSI, RODRIGO; LIN, LIANSHAN; RODRIGUES, RENATA C. S.; HEO, YOUNG C.; CONRAD, HEATHER J.; DE MATTOS, MARIA DA GLORIA C.; RIBEIRO, RICARDO F.; FOK, ALEX S. L. Digital image correlation analysis of the load transfer by implant-supported restorations. JOURNAL OF BIOMECHANICS, v. 44, n. 6, p. 1008-1013, APR 7 2011. Web of Science Citations: 20.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

TIOSSI, Rodrigo. Efeitos do uso de próteses múltiplas implantossuportadas, unidas e isoladas, nas tensões geradas em áreas posteriores da mandíbula. 2010. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto Ribeirão Preto.