A comparative FEM-study of tooth mobility using isotropic and anisotropic models of the periodontal ligament

Provatidis, CG

dc.contributor.author	Provatidis, CG	en
dc.date.accessioned	2014-03-01T01:15:24Z
dc.date.available	2014-03-01T01:15:24Z
dc.date.issued	2000	en
dc.identifier.issn	1350-4533	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13478
dc.subject	orthodontics	en
dc.subject	periodontal ligament	en
dc.subject	centre of resistance	en
dc.subject	centre of rotation	en
dc.subject	biomechanics	en
dc.subject	finite element methods	en
dc.subject.classification	Engineering, Biomedical	en
dc.subject.other	FINITE-ELEMENT METHOD	en
dc.subject.other	ORTHODONTIC FORCES	en
dc.subject.other	ROTATION	en
dc.subject.other	CENTERS	en
dc.subject.other	STRESS	en
dc.subject.other	MOVEMENT	en
dc.subject.other	CANINE	en
dc.subject.other	TISSUE	en
dc.title	A comparative FEM-study of tooth mobility using isotropic and anisotropic models of the periodontal ligament	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1350-4533(00)00055-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1350-4533(00)00055-2	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Orthodontic tooth movement is usually characterized by two centres: the centre of resistance and the centre of rotation. A literature survey shows that both centres vary to a significant extent in both clinical and computational experiments. This paper reports on studies upon five different hypothetical mechanical representations of the periodontal ligament (PDL) which plays the most significant role in tooth mobility. The first model considers the PDL as an isotropic and linear-elastic continuum without fibres; it also discusses some preliminary visco-elastic aspects. The next three models assume a nonlinear and anisotropic material composed of fibres only that are arranged in three different orientations, two hypothetical that have appeared previously in the literature and one more consistent with actual morphological data. The fifth model considers the PDL as an orthotropic material consisting of both a continuum and of fibres. Results were obtained by applying the Finite Element Method (FEM) on a maxillary central incisor. It was found that the isotropic linear-elastic PDL leads to occlusal positions of both centres in comparison with those obtained through the well-known Burstone's theoretical formula, while histological anisotropic fibres locate them apically and eccentrically. (C) 2000 IPEM. Published by Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	MEDICAL ENGINEERING & PHYSICS	en
dc.identifier.doi	10.1016/S1350-4533(00)00055-2	en
dc.identifier.isi	ISI:000165570000006	en
dc.identifier.volume	22	en
dc.identifier.issue	5	en
dc.identifier.spage	359	en
dc.identifier.epage	370	en