Mechanical behavior of prosthesis in Toucan beak (Ramphastos toco)

Página do item simplificado
dc.contributor.authorFECCHIO, R. S.
dc.contributor.authorSEKI, Y.
dc.contributor.authorBODDE, S. G.
dc.contributor.authorGOMES, M. S.
dc.contributor.authorKOLOSOSKI, J.
dc.contributor.authorROSSI JR. J. L.
dc.contributor.authorGIOSO, M. A.
dc.contributor.authorMEYERS, M. A.
dc.date.accessioned2022-01-12T22:04:02Z
dc.date.available2022-01-12T22:04:02Z
dc.date.issued2010-04-06
dc.description.abstractThe purpose of this study is to characterize the structure of the beak of Toco Toucan (Ramphastos toco) and to investigate means for arresting fractures in the rhinotheca using acrylic resin. The structure of the rhamphastid bill has been described as a sandwich structured composite having a thin exterior comprised of keratin and a thick foam core constructed of mineralized collagenous rods (trabeculae). The keratinous rhamphotheca consists of superposed polygonal scales (approximately 50 μm in diameter and 1 μm in thickness). In order to simulate the orientation of loading to which the beak is subjected during exertion of bite force, for example, we conducted flexure tests on the dorso-ventral axis of the maxilla. The initially intact (without induced fracture) beak fractured in the central portion when subjected to a force of 270 N, at a displacement of 23 mm. The location of this fracture served as a reference for the fractures induced in other beaks tested. The second beak was fractured and repaired by applying resin on both lateral surfaces. The repaired maxilla sustained a force of 70 N with 6.5 mm deflection. The third maxilla was repaired similarly except that it was conditioned in acid for 60 s prior to fixation with resin. It resisted a force of up to 63 N at 6 mm of deflection. The experimental results were compared with finite element calculations for unfractured beak in bending configuration. The repaired specimens were found to have strength equal to only one third of the intact beak. Finite element simulations allow visualization of how the beak system (sandwich shell and cellular core) sustains high flexural strength. © 2009 Elsevier B.V.
dc.description.firstpage460
dc.description.issuenumber3
dc.description.lastpage464
dc.description.volume30
dc.identifier.citationFECCHIO, R. S.; SEKI, Y.; BODDE, S. G.; GOMES, M. S.; KOLOSOSKI, J.; ROSSI JR. J. L.; GIOSO, M. A.; MEYERS, M. A. Mechanical behavior of prosthesis in Toucan beak (Ramphastos toco). Materials Science and Engineering C, v. 30, n. 3, p. 460-464, Apr. 2010.
dc.identifier.doi10.1016/j.msec.2010.01.001
dc.identifier.issn0928-4931
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/4244
dc.relation.ispartofMaterials Science and Engineering C
dc.rightsAcesso Aberto
dc.subject.otherlanguageAcid conditioner
dc.subject.otherlanguageAnatomical structure
dc.subject.otherlanguageFEM
dc.subject.otherlanguageResin
dc.subject.otherlanguageRhinotheca
dc.subject.otherlanguageToucans beak
dc.titleMechanical behavior of prosthesis in Toucan beak (Ramphastos toco)
dc.typeArtigo
fei.scopus.citations23
fei.scopus.eid2-s2.0-77649180160
fei.scopus.subjectAcrylic resins
fei.scopus.subjectAnatomical structure
fei.scopus.subjectAnatomical structures
fei.scopus.subjectFEM
fei.scopus.subjectFinite element calculations
fei.scopus.subjectFinite element simulations
fei.scopus.subjectFoam core
fei.scopus.subjectHigh flexural strength
fei.scopus.subjectLateral surface
fei.scopus.subjectMechanical behavior
fei.scopus.subjectSandwich shells
fei.scopus.subjectToucan beak
fei.scopus.updated2024-07-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77649180160&origin=inward
Arquivos
Coleções
Artigos