Failure probability, stress distribution and fracture analysis of external hexagon implants with microunit abutment

• Grant number: 13/17733-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2013
• End date: October 31, 2014
• Field of knowledge: Health Sciences - Dentistry
• Principal Investigator: Renata Marques de Melo Marinho
• Grantee: Gabriela Gonçalves Mendes
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

The aim of the present study is to determine the failure probability and stress distribution as well as to determine the site of fracture initiation of external hexagon implants with micro-unit abutments.40 micro-unit abutments (Conexão Sistemas de Prótese, Arujá, SP) will be screwed to external hexagon implants of 13 mm in height. The implants be will be made perpendicular to the horizontal plane in the polyurethane cylinder (F16, Axson Brasil, Socorro, SP). The implant will be fixed to the cylinder under a torch of 40N/cm, leaving 3 mm outside the bed. The abutments will be fixed to the implants with a torch of 20N/cm. A hemispherical cap will be used on the abutment so that the set can be tested under static loading (100 kgf) until fracture, according to ISO 14801. The fracture analysis will be made under stereomicroscope and scanning electron microscopy. The Weibull analysis will be performed to determine the failure probability by ranking the stress values in crescent order. To know the stress distribution along the abutments and implants a finite element analysis will be performed.(AU)

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)

ANTONIO BRAULINO DE MELO FILHO; JOÃO PAULO MENDES TRIBST; NATHÁLIA DE CARVALHO RAMOS; JULIO NOGUEIRA LUZ; MARIA APARECIDA NEVES JARDINI; ALEXANDRE LUIZ SOUTO BORGES; MAURO PEDRINE SANTAMARIA; RENATA MARQUES DE MELO. Failure Probability, Stress Distribution and Fracture Analysis of Experimental Screw for Micro Conical Abutment. Brazilian Dental Journal, v. 30, n. 2, p. 157-163, 2019-04-04. (13/17733-0)