Computer tomography for virtual models in dental imaging

Natali, Alberto; Viola, Marco

doi:10.1201/9780203514849.ch3

Cited by 5 publications

(10 citation statements)

References 15 publications

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“…The procedure seems to be effective for modelling microscopic structures such as, for instance, trabecular bone volumes 25 - 28 . However, the presence of “ramp effects” in the reconstructed contour surfaces makes it very difficult to simulate the actual behaviour of bone-implant interfaces 29 . Contact problems can be solved with VB only by adopting smoothing techniques 30 , 31 where interaction with the user is however required.…”

Section: Finite Element Methods (Fem)mentioning

confidence: 99%

Finite Element Method (FEM), Mechanobiology and Biomimetic Scaffolds in Bone Tissue Engineering

Boccaccio¹,

Ballini²,

Pappalettere³

et al. 2011

Int. J. Biol. Sci.

138

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Techniques of bone reconstructive surgery are largely based on conventional, non-cell-based therapies that rely on the use of durable materials from outside the patient's body. In contrast to conventional materials, bone tissue engineering is an interdisciplinary field that applies the principles of engineering and life sciences towards the development of biological substitutes that restore, maintain, or improve bone tissue function. Bone tissue engineering has led to great expectations for clinical surgery or various diseases that cannot be solved with traditional devices. For example, critical-sized defects in bone, whether induced by primary tumor resection, trauma, or selective surgery have in many cases presented insurmountable challenges to the current gold standard treatment for bone repair. The primary purpose of bone tissue engineering is to apply engineering principles to incite and promote the natural healing process of bone which does not occur in critical-sized defects. The total market for bone tissue regeneration and repair was valued at $1.1 billion in 2007 and is projected to increase to nearly $1.6 billion by 2014.Usually, temporary biomimetic scaffolds are utilized for accommodating cell growth and bone tissue genesis. The scaffold has to promote biological processes such as the production of extra-cellular matrix and vascularisation, furthermore the scaffold has to withstand the mechanical loads acting on it and to transfer them to the natural tissues located in the vicinity. The design of a scaffold for the guided regeneration of a bony tissue requires a multidisciplinary approach. Finite element method and mechanobiology can be used in an integrated approach to find the optimal parameters governing bone scaffold performance.In this paper, a review of the studies that through a combined use of finite element method and mechano-regulation algorithms described the possible patterns of tissue differentiation in biomimetic scaffolds for bone tissue engineering is given. Firstly, the generalities of the finite element method of structural analysis are outlined; second, the issues related to the generation of a finite element model of a given anatomical site or of a bone scaffold are discussed; thirdly, the principles on which mechanobiology is based, the principal theories as well as the main applications of mechano-regulation models in bone tissue engineering are described; finally, the limitations of the mechanobiological models and the future perspectives are indicated.

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Section: Finite Element Methods (Fem)mentioning

confidence: 99%

Finite Element Method (FEM), Mechanobiology and Biomimetic Scaffolds in Bone Tissue Engineering

Boccaccio¹,

Ballini²,

Pappalettere³

et al. 2011

Int. J. Biol. Sci.

138

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show abstract

“…In the present work, different endosseus implants are modeled by means of a reverse engineering procedure, thus obtaining geometry configurations that match the actual ones with high precision. With a similar process, but starting from computerized tomography (CT) data, different portions of adult patients's mandibles are reconstructed (Natali & Viola 2003). The dimensions of the anatomical site portion assumed in the model are set in order to ensure enough distance between the implants and the ends of the model, thus avoiding any undesired boundary effects measured in the peri‐implant region (Natali & Pavan 2003).…”

mentioning

confidence: 99%

Analysis of bone–implant interaction phenomena by using a numerical approach

Natali

Pavan

Ruggero

2005

Clinical Oral Implants Res

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“…5,13–15 In addition, both the cortical and the cancellous bones in the mandible are simplified by using piecewise homogeneity, regardless of their heterogeneity. 5 There have been few studies on the biomechanics of the heterogeneous mandibular bone as a result of the occlusal force applied to the dentition with complex tissues. 5,13…”

Section: Introductionmentioning

confidence: 99%

“…5 There have been few studies on the biomechanics of the heterogeneous mandibular bone as a result of the occlusal force applied to the dentition with complex tissues. 5,13…”

Section: Introductionmentioning

confidence: 99%

“…To date, there have been many published studies dealing with the use of computed tomography (CT) to acquire detailed information regarding the anatomical architecture of the human mandible. [5][6][7][8][9][10][11][12] When generating a 3D FE model constructed from CT data, it is usually necessary to apply several types of software and/or tools for extracting, 3D modeling, and meshing, which, in turn, requires a great deal of time, skill, and financial resources.…”

Section: Introductionmentioning

confidence: 99%

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Dental application of novel finite element analysis software for three-dimensional finite element modeling of a dentulous mandible from its computed tomography images

Nakamura

Tajima

Chen

et al. 2013

Proc Inst Mech Eng H

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This study focused on the application of novel finite-element analysis software for constructing a finite-element model from the computed tomography data of a human dentulous mandible. The finite-element model is necessary for evaluating the mechanical response of the alveolar part of the mandible, resulting from occlusal force applied to the teeth during biting. Commercially available patient-specific general computed tomography-based finite-element analysis software was solely applied to the finite-element analysis for the extraction of computed tomography data. The mandibular bone with teeth was extracted from the original images. Both the enamel and the dentin were extracted after image processing, and the periodontal ligament was created from the segmented dentin. The constructed finite-element model was reasonably accurate using a total of 234,644 nodes and 1,268,784 tetrahedral and 40,665 shell elements. The elastic moduli of the heterogeneous mandibular bone were determined from the bone density data of the computed tomography images. The results suggested that the software applied in this study is both useful and powerful for creating a more accurate three-dimensional finite-element model of a dentulous mandible from the computed tomography data without the need for any other software.

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Computer tomography for virtual models in dental imaging

Cited by 5 publications

References 15 publications

Finite Element Method (FEM), Mechanobiology and Biomimetic Scaffolds in Bone Tissue Engineering

Finite Element Method (FEM), Mechanobiology and Biomimetic Scaffolds in Bone Tissue Engineering

Analysis of bone–implant interaction phenomena by using a numerical approach

Dental application of novel finite element analysis software for three-dimensional finite element modeling of a dentulous mandible from its computed tomography images

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