Photoelastic and finite element stress analysis reliability for implant-supported system stress investigation
Braz. j. oral sci
;
17: e181097, 2018. ilus
Article
in English
| LILACS, BBO
| ID: biblio-963829
ABSTRACT
Aim:
To compare the reliability between photoelastic and finite element (FE) analyses by evaluating the effect of different marginal misfit levels on the stresses generated on two different implant-supported systems using conventional and short implants.Methods:
Two photoelastic models were obtained model C with two conventional implants (4.1×11 mm); and model S with a conventional and a short implant (5×6 mm). Three-unit CoCr frameworks were fabricated simulating a superior first pre-molar (P) to first molar (M) fixed dental prosthesis. Different levels of misfit (µm) were selected based on the misfit average of 10 frameworks obtained by the single-screw test protocol low (<20), medium (>20 and <40) and high (>40). Stress levels and distribution were measured by photoelastic analysis. A similar situation of the in vitro assay was designed and simulated by the in silico analysis. Maximum and minimum principal strain were recorded numerically and color-coded for the models. Von Mises Stress was obtained for the metallic components.Results:
Photoelasticity and FE analyses showed similar tendency where the increase of misfit generates higher stress levels despite of the implant design. The short implant showed lower von Mises stress values; however, it presented stresses around its full length for the in vitro and in silico analysis. Also, model S showed higher µstrain values for all simulated misfit levels. The type of implant did not affect the stresses around pillar P.Conclusions:
Photoelasticity and FEA are reliable methodologies presenting similarity for the investigation of the biomechanical behavior of implant-supported rehabilitations
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Biomechanical Phenomena
/
Dental Implants
/
Finite Element Analysis
/
Optical Phenomena
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2018
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Minas Gerais/BR
/
University of Campinas/BR
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