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Influence of the number and type of implant, implant / abutment connection and attachment systems on the stress distribution in mandibular Overdentures - Photoelastic Analysis and Finite Elements in 3D

Grant number: 14/19098-3
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): January 01, 2015
Effective date (End): December 31, 2016
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Principal Investigator:Altair Antoninha Del Bel Cury
Grantee:Marina Xavier Pisani
Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil


This study will evaluate the biomechanical behavior of Mandibular Overdentures retained by implants (regular, mini implants, varying implant/abutment connection and attachments), through photoelasticity and 3D finite element method (FEM), under load. Experimental models of Mandibular Overdentures prepared to photoelasticity will be modeled and inserted into the computer to FEM analysis, in the situations: 1) 2 regular implants in the region of lower canines, attachment O'Ring/external hexagon connection-HE; 2) Likewise, internal hexagon connection-HI; 3) Likewise, morse taper connection-CM; 4) 2 regular implants, attachment Equator/HE connection 5) Likewise, HI connection; 6) Likewise, CM connection; 7) 01 regular implant in the median region, O'Ring / HE connection; 8) Likewise, HI connection; 9) Likewise, CM connection; 10) Likewise, Equator/ HE connection; 11) Likewise, HI connection; 12) Likewise, CM connection; 13) 2 mini implants / O'ring in the region of lower canines; and 14) 01 mini implant /O-ring in median region. For both analyzes, axial loads (100N) will be applied in the central region of first left and right molars and between central incisors. The results will be analyzed and compared with appropriate statistical analysis, in order to verify agreement or disagreement of patterns of distribution and /or quantitative stress values obtained for each technique.

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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)
BORGES, GUILHERME ALMEIDA; CAMACHO PRESOTTO, ANNA GABRIELLA; CALDAS, RICARDO ARMINI; PISANI, MARINA XAVIER; MESQUITA, MARCELO FERRAZ. Is one dental mini-implant biomechanically appropriate for the retention of a mandibular overdenture? A comparison with Morse taper and external hexagon platforms. JOURNAL OF PROSTHETIC DENTISTRY, v. 125, n. 3, p. 491-499, . (18/03136-4, 14/19098-3)
PISANI, MARINA XAVIER; CAMACHO PRESOTTO, ANNA GABRIELLA; MESQUITA, MARCELO FERRAZ; RICARDO BARAO, VALENTIM ADELINO; KEMMOKU, DANIEL TAKANORI; DEL BEL CURY, ALTAIR ANTONINHA. Biomechanical behavior of 2-implant- and single-implant-retained mandibular overdentures with conventional or mini implants. JOURNAL OF PROSTHETIC DENTISTRY, v. 120, n. 3, p. 421-430, . (14/19098-3)

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