Anisotropic elastic properties of cancellous bone from a human edentulous mandible

O'Mahony, A; Williams, John L.; Katz, Jerald O.; Spencer, Paulette

doi:10.1034/j.1600-0501.2000.011005415.x

Cited by 154 publications

(109 citation statements)

References 17 publications

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“…In this study, trabecular bone was assumed to be homogenous and isotropic, which differs from patient-specific FE models [9,10] using real structures of trabecular bone from computed tomography data, and the anisotropic properties [11] of real bone. It would be clinically useful if patient-specific FE models could routinely be constructed easily for clinical diagnosis of bone 13 quality with a lower cost.…”

Section: Optimized Calculationmentioning

confidence: 99%

Minimization of dental implant diameter and length according to bone quality determined by finite element analysis and optimized calculation

Ueda

Takayama

Yokoyama

2017

Journal of Prosthodontic Research

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According to the variables determined using Latin hypercube sampling, 500 FE models were constructed and analyzed under each of the loads following the construction of response surfaces with the MES as a response value. D and L were minimized by optimized calculation with the MES limited to the physiological limit with reference to the mechanostat theory.Results: The MES was significantly influenced by D more than L, and could be restricted to the physiological limit unless both C and T were small. Finite Element ModelWe created three-dimensional finite element models (Fig. 1) 2). The superstructure of the implant prosthesis was simplified and consisted of gold alloy. All components, the bone, the superstructure, the abutment, and the implant body, were assumed to be fixed to each other.The models consisted of approximately 84,000 nodes and 80,000 hexahedron elements on average. All elements were homogenous and isotropic. The properties of the materials (Table 1) were based on previous studies. The nodes on the mesial and distal sections of the mandible were restrained in all directions. Loading Conditions

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Section: Optimized Calculationmentioning

confidence: 99%

Minimization of dental implant diameter and length according to bone quality determined by finite element analysis and optimized calculation

Ueda

Takayama

Yokoyama

2017

Journal of Prosthodontic Research

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“…Their mechanical properties are summarized in Table 1 [30][31][32][33][34] . As reviewed by Kinney et al 35) , an orthotropic symmetry better describes the effects of tubular orientation and disposition of collagen fibrils orthogonal to the tubules on dentin microstructure.…”

Section: Materials Properties 1) Natural Tissuesmentioning

confidence: 99%

Non-linear Viscoelastic Finite Element Analysis of the Effect of the Length of Glass Fiber Posts on the Biomechanical Behaviour of Directly Restored Incisors and Surrounding Alveolar Bone

et al. 2008

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The study aimed at estimating the effect of insertion length of posts with composite restorations on stress and strain distributions in central incisors and surrounding bone. The typical, average geometries were generated in a FEA environment. Dentin was considered as an elastic orthotropic material, and periodontal ligament was coupled with nonlinear viscoelastic mechanical properties. The model was then validated with experimental data on displacement of incisors from published literature. Three post lengths were investigated in this study: root insertion of 5, 7, and 9 mm. For control, a sound incisor model was generated. Then, a tearing load of 50 N was applied to both sound tooth and simulation models. Post restorations did not seem to affect the strain distribution in bone when compared to the control. All simulated post restorations affected incisor biomechanics and reduced the root ' s deforming capability, while the composite crowns underwent a higher degree of deformation than the sound crown. No differences could be noticed in incisor stress and strain. As for the influence of post length, it was not shown to affect the biomechanics of restored teeth.

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“…Several techniques can be found for determining the Young's modulus of the single trabeculae 6 17 ). The macro structural Young's modulus value of cancellous bone was estimated by means of three different methods: using Hodgkinson and Currey's (1992) empirical equations relating modulus and density 6 , by the means of fi nite element analysis 15 or compression tests 18,19 .…”

Section: Modelling the Bonementioning

confidence: 99%

Microstructural simulations of the bone surrounding dental implants by means of a stochastically generated frame model

Lakatos¹,

Bojtár²

2010

Biomech Hung

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The biomechanical behaviour of a dental implant plays an important role in its functional longevity inside the bone. Occlusal forces affect the bone surrounding an oral implant. To avoid fracture and bone resorption -by achieving the most even stress distribution in the boneimplants should be applied that transfer occlusal forces to the bone within physiologic limits with geometry capable to enhance bone formation. The following study deals with the trabecular bone substance especially surrounding dental implants considering the microscopic conformation of the bone. The dental surgical use of a formerly developed stochastically generated frame model of the trabecular bone is introduced, which is created by interlinking a stochastically generated set of nodes in a certain domain, according to a previously defi ned linking-rule. The fi nite element model possesses the geometrical and mechanical microstructural properties -obtained from literature -of the trabecular bone substance of an average man from the edentulous mandibular region. The fi nite element beam model was submitted to compression, shear and torsion tests, and the macro-structural elastic properties were computed from the result data obtained by means of fi nite element analysis. The thus received frame model was combined with the fi nite element model of the cortical bone layer in the mandible (lower jaw bone) and a dental implant, where the incompleteness of the bone-implant interface was taken into account.

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Anisotropic elastic properties of cancellous bone from a human edentulous mandible

Cited by 154 publications

References 17 publications

Minimization of dental implant diameter and length according to bone quality determined by finite element analysis and optimized calculation

Minimization of dental implant diameter and length according to bone quality determined by finite element analysis and optimized calculation

Non-linear Viscoelastic Finite Element Analysis of the Effect of the Length of Glass Fiber Posts on the Biomechanical Behaviour of Directly Restored Incisors and Surrounding Alveolar Bone

Microstructural simulations of the bone surrounding dental implants by means of a stochastically generated frame model

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