Page 23 - SPEMD_58-2

Revista Portuguesa de Estomatologia,
Medicina Dentária e Cirurgia Maxilofacial

rev port estomatol med dent cir maxilofac. 2017;58(2):79-90

Original research

Design and validation of a short implant
rehabilitation model

b
b
José Joaquim da Rocha Ferreira a,b, *, José Manuel Oliveira , Santiago D. Castellanos ,
c,d
André Correia , Ana Rosanete Reis a,b
a Faculdade de Engenharia da Universidade do Porto (FEUP)/ Instituto de Engenharia Mecânica e Gestão Industrial (INEGI), Porto, Portugal
b Instituto de Engenharia Mecânica e Gestão Industrial (INEGI), Porto, Portugal
c Universidade Católica Portuguesa, Instituto de Ciências da Saúde, Viseu, Portugal
d Universidade Católica Portuguesa, CIIS Centro de Investigação Interdisciplinar em Saúde, Instituto de Ciências da Saúde, Viseu, Portugal

a r t i c l e i n f o a b s t r a c t
Article history: Objectives: This research intended to develop and validate a digital model that could be used
Received 14 December 2016 to study the stresses and strains created in the different components involved in oral fixed
Accepted 28 June 2017 rehabilitations with short implants. The validated model was then used to simulate a clin-
Available online 7 July 2017 ical-like situation.
Methods: A digital model was created considering the posterior areas of the mandible. Its mate-
Keywords: rialization obtained ten specimens of the experimental prototype. Seven of them were static
Experimental model compressive tested until failure and, for the other three, the tests were progressively interrupted,
Numerical model to allow the establishment of a damage sequence. On the numerical model a finite element anal-
Short implants ysis was performed with Abaqus software, under similar conditions to the experimental situation.
Stress and strain Results: The stress pattern on the FEA and the failure location on the static test were similar.
The sequence in which each part reached the yield strength was the same as that observed
on the interrupted static test (resin, prosthetic framework, implants and implant screws, in
this order). Due to these results, the model was considered valid. A clinical-like simulation
with the validated model showed that buccal cortical bone, around the implants platform,
is the weakest part of such a rehabilitation.
Conclusions: This research allowed the development and validation of a computer-aided
design model that can be used to study an oral fixed rehabilitation supported by short im-
plants. For clinical purposes, it is important to refer that the highest stress and strain values
were found on the cortical bone around the buccal aspect of the implants. (Rev Port Esto-
matol Med Dent Cir Maxilofac. 2017;58(2):79-90)
© 2017 Sociedade Portuguesa de Estomatologia e Medicina Dentária.
Published by SPEMD. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/by-nc-nd/4.0/).

* Corresponding author.
E-mail address: jose.j.r.ferreira.299@gmail.com (José Joaquim da Rocha Ferreira).
http://doi.org/10.24873/j.rpemd.2017.07.017
1646-2890/© 2017 Sociedade Portuguesa de Estomatologia e Medicina Dentária. Published by SPEMD.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).