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TECHNICAL PAPERS

An Interface Model for the Periodontal Ligament

[+] Author and Article Information
Massimiliano Gei

Dipartimento di Scienze e Metodi dell’Ingegneria, Università di Modena e Reggio Emilia, Via Fogliani 1, I-42100 Reggio Emilia, Italiae-mail: mgei@unimo.it

Francesco Genna

Dipartimento di Ingegneria Civile, Università di Brescia, Via Branze 38, I-25123 Brescia, Italiae-mail: genna@bscivgen.ing.unibs.it

Davide Bigoni

Dipartimento di Ingegneria Meccanica e Strutturale, Università di Trento, Via Mesiano 77, I-38050 Trento, Italiae-mail: bigoni@ing.unitn.it

J Biomech Eng 124(5), 538-546 (Sep 30, 2002) (9 pages) doi:10.1115/1.1502664 History: Received April 01, 2001; Online September 30, 2002
Copyright © 2002 by ASME
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References

Figures

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Sketch of two continuous bodies in contact through the interface Ξ
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Experimental 8 and proposed (Eqs. (10) and (11)) stress-strain curves for a uniaxial traction/compression test
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Experimental 9 and proposed (Eqs. (17) and (18)) stress-strain curves for a shear test
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Numerical model for the three-dimensional simulations. The model has 10092 nodes and 41996 elements, of which 37789 tetrahedral 4-noded elements and 4207 interface elements.
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von Mises equivalent stress: axial loading, PDL treated as a perfect interface
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von Mises equivalent stress: axial loading, PDL simulated by means of the proposed nonlinear interface element
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von Mises equivalent stress: transverse loading, PDL treated as a perfect interface
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von Mises equivalent stress: transverse loading, PDL simulated by means of the proposed nonlinear interface element
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Tooth mobility curves in compression: the symbols refer to experimental results for a molar 6 and an upper incisor 7, the lines to our simulations. The solid thick line has been obtained by using the proposed nonlinear interface model; the others by using linear interfaces as indicated.
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Tensile axial load—axial displacement curve obtained from the numerical simualtion of the extraction of the frontal incisor, mesh of Fig. 4

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