首页|Fibre Bragg grating sensors for sutural expansion assessment in rapid palatal expanders: an ex-vivo validation

Fibre Bragg grating sensors for sutural expansion assessment in rapid palatal expanders: an ex-vivo validation

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  • NETL
  • NSTL
  • Inst Engineering Technology-Iet
This study presents the development and validation of a fibre Bragg gratings (FBGs)-based sensor system for the assessment of strain in the midpalatal suture in subjects using rapid palatal expanders (RPEs). The ex-vivo experiments were made by means of positioning two RPEs in a porcine palatal region. The RPEs used were the Hyrax, a tooth-borne expander and MARPE (microimplant-assisted rapid palatal expansion), a bone-borne expander. In order to define the regions in the palatal region for the sensors positioning, a finite-element analysis was performed in a porcine head subjected to the loadings caused by an RPE. In addition, a strain transfer model was used to obtain a correction coefficient that approximates the strain estimated by the FBG to the actual strain in the structure under shear and normal stress. Results show high linearity in the sensors characterisation tests with the advantages of compactness, intrinsic safe operation and multiplexing capabilities of FBGs. In the RPE analysis, a higher strain was estimated in the anterior region, which is in accordance with the simulation and previously reported results, where MARPE showed a higher strain (with an exponential pattern) than Hyrax as the number of activations increase.

strain measurementbiomedical equipmentbiomechanicsfinite element analysisfibre optic sensorsdentistryBragg gratingsbonesutural expansion assessmentrapid palatal expandersex-vivo validationmidpalatal sutureRPEsex-vivo experimentsporcine palatal regiontooth-borne expandermicroimplant-assisted rapid palatal expansionbone-borne expandersensor positioningstrain transfer modelsensor characterisation testsintrinsic safe operationanterior regionfibre Bragg grating-based sensor systemfinite-element analysisporcine headcorrection coefficientnormal stressshear stressmultiplexing capabilityHyrax

Coimbra, Wagner、Campos, Vinicius、Oliveira, Pedro Lima Emmerich、Frizera, Anselmo、Sant'Anna, Eduardo F.、Souza Araujo, Monica T.、Andrade, Rafhael、Leal-Junior, Arnaldo

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Univ Fed Espirito Santo, Mech Engn Dept, BR-29075910 Vitoria, ES, Brazil

Univ Fed Rio de Janeiro, Orthodont & Paediat Dent Dept, BR-21941590 Rio De Janeiro, Brazil

Univ Fed Espirito Santo, Grad Program Elect Engn, BR-29075910 Vitoria, ES, Brazil

Univ Fed Espirito Santo, Mech Engn Dept, BR-29075910 Vitoria, ES, Brazil|Univ Fed Espirito Santo, Grad Program Elect Engn, BR-29075910 Vitoria, ES, Brazil

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2020

10.1049/iet-opt.2020.0044

IET optoelectronics

IET optoelectronics

ISSN：1751-8768
年,卷(期)：2020.14(6)
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