FEM and BEM Analysis of a Human Mandible with Added Temporomandibular Joints

Citarella, Roberto; Armentani, Enrico; Caputo, Francesco; Naddeo, Alessandro

doi:10.2174/1874155x01206010100

Cited by 14 publications

(11 citation statements)

References 26 publications

(36 reference statements)

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“…The bone material properties are calculated starting from data available from literature [14][15][16][17]. The value of boneimplant interface friction coefficient μ=0.42 is taken from reference [18].…”

Section: Problem Description and Numerical Modelsmentioning

confidence: 99%

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Stress Analysis of an Endosseus Dental Implant by BEM and FEM

Citarella¹,

Armentani

Caputo³

et al. 2012

TOMEJ

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In this work the Boundary Element Method (BEM) and the Finite Element Method (FEM) have been used for an elastic-static analysis of both a Branemark dental implant and a generic conic threaded implant, modelled either in the complete mandible or in a mandibular segment, under axial and lateral loading conditions. Two different hypotheses are considered with reference to degree of osteo-integration between the implant and the mandibular bone: perfect and partial osteointegration. The BEM analysis takes advantage of the submodelling technique, applied on the region surrounding the implant. Such region is extracted from the overall mandible and the boundary conditions for such submodel are obtained from the stress analysis realised on the complete mandible. The obtained results provide the localisation of the most stressed areas at the bone-implant interface and at the mandibular canal (containing the alveolar nerve) which represent the most critical areas during mastication. This methodology, enriched with the tools necessary for the numerical mandible reconstruction, is useful to realise sensitivity analysis of the stress field against a variation of the localisation, inclination and typology of the considered implant, in order to assess the optimal implant conditions for each patient under treatment. Due to the high flexibility in the pre- and post-processing phase and accuracy in reproducing superficial stress gradients, BEM is more efficient than FEM in facing this kind of problem, especially when a linear elastic constitutive material law is adopted

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Section: Problem Description and Numerical Modelsmentioning

confidence: 99%

“…The accuracy of mandible stress distribution is enhanced by a realistic modelling of temporomandibular joints (one of the most critical areas after dental interventions) [14,15], thus obtaining a higher precision in the boundary condition definition.…”

Section: Introductionmentioning

confidence: 99%

Stress Analysis of an Endosseus Dental Implant by BEM and FEM

Citarella¹,

Armentani

Caputo³

et al. 2012

TOMEJ

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“…During chewing load model was in a complex stress state (tensile strain, compression, bending, and shear). The distribution of stress has been uneven, stress concentration was in sectors of expressed and dense cortical layer: the front of mandible (8,(4)(5)(6)(7)(8)(9)(10)(11)2 The uneven distribution of stresses in the bone is obvious, because it is well known that the lower jaw is heterogeneous bone structure [19]. These features are contributed to individual physical and mechanical properties and functional features that are inherent in the lower jaw.…”

Section: Results Of Researchmentioning

confidence: 99%

“…Computer modeling is a revolutionary introduction to the subject using mathematical and experimental models [1][2][3]. Finite element method (FEM) was firstly used in dentistry, is an innovative and progressive solution of static and dynamic problems in biological systems including bone structures and cartilage [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Computer Modelling and Stress-Strain Analysis of Temporomandibular Joint

Palyvoda

Маланчук

Kryschuk

et al. 2016

EUREKA: Health Sciences

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The main purpose of the study is to build 3D model of temporomandibular joint and mandible using programs for modelling and design, research stress and strain in cartilage and bone of model depending on different contraction of chewing muscles (especially lateral pterygoid muscle). There were used such methods as computer tomography data, finite element method and analysis topography of lateral pterygoid muscle on cadavers. In results of study was obtained maximal stress in anterior and distal parts of articular disc between 1,4–3 MPa and 0,4–1 MPa. Thus, static loads of articular disc were different, depends on force of contraction lateral pterygoid muscle. Muscle disturbances (hyperfunctioning, atrophy etc.) should be considered in treatment of temporomandibular dysfunction and examined on magnetic resonance investigation if it is present in the same patient.

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“…However, limited evidence exists with regard to the proper distance from implant to mandibular nerve that can ensure the implant's integrity as well as physiologic activity 17 . It is the opinion of the authors of the present study that this proper distance should be deduced not only from the evaluation of clinical data (retrospective study), but also from biomechanical analysis 18,19 . Therefore, using boundary element method (BEM), a numeric methodology was created to simulate a mandibular segment containing multiple fixtures, so that the mechanical stresses induced by the occlusal loads on the mandibular canal could be properly assessed.…”

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confidence: 99%