Finite element model based on a mandibular cast and a waxed complete denture: Evaluation of the accuracy and the reproducibility of analysis

Takayama, Yoshihisa; Sasaki, Hidetada; Saito, Morio; Sakaguchi, Kenichiro; Mizuno, Kentaro; Goto, Marie; Yokoyama, Atsuro

doi:10.1016/j.jpor.2008.08.005

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…Other studies have adopted either fully bonded, fully tied or other linear contact mechanism between the denture and the mucosa, to simulate a linear transmission of occlusal forces [ 78 , 83 , 86 , 87 , 92 , 99 , 100 , 102 , 106 ]. On the other hand, while incorporating this nonlinear mechanism, most studies adopted different frictional coefficients ranging from 0 (frictionless) to 0.75 (penalty contact) [ 76 , 77 , 84 , 85 , 88 , 90 , 91 , 93 , 97 , 101 , 147 , 178 , 180 , 185 ].…”

Section: Biomechanical Responsesmentioning

confidence: 99%

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Biomechanics of oral mucosa

Chen

Ahmad

et al. 2015

J. R. Soc. Interface.

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The prevalence of prosthodontic treatment has been well recognized, and the need is continuously increasing with the ageing population. While the oral mucosa plays a critical role in the treatment outcome, the associated biomechanics is not yet fully understood. Using the literature available, this paper provides a critical review on four aspects of mucosal biomechanics, including static, dynamic, volumetric and interactive responses, which are interpreted by its elasticity, viscosity/permeability, apparent Poisson's ratio and friction coefficient, respectively. Both empirical studies and numerical models are analysed and compared to gain anatomical and physiological insights. Furthermore, the clinical applications of such biomechanical knowledge on the mucosa are explored to address some critical concerns, including stimuli for tissue remodelling (interstitial hydrostatic pressure), pressure–pain thresholds, tissue displaceability and residual bone resorption. Through this review, the state of the art in mucosal biomechanics and their clinical implications are discussed for future research interests, including clinical applications, computational modelling, design optimization and prosthetic fabrication.

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Section: Biomechanical Responsesmentioning

confidence: 99%

“…Interface 12: 20150325 forces [78,83,86,87,92,99,100,102,106]. On the other hand, while incorporating this nonlinear mechanism, most studies adopted different frictional coefficients ranging from 0 (frictionless) to 0.75 ( penalty contact) [76,77,84,85,88,90,91,93,97,101,147,178,180,185].…”

Section: Friction Coefficientmentioning

confidence: 99%

Biomechanics of oral mucosa

Chen

Ahmad

et al. 2015

J. R. Soc. Interface.

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“…The techniques for acquiring geometrical data include manual tracing, computed tomography (CT) scanning, and magnetic resonance imaging (MRI); the collected information is then input into a computer-aided design (CAD) program, from which meshable data can be exported. Touch-probe digitizers [6] and laser scanners [7] can provide highly accurate measurements of the surface, while CT [8] and MRI [9] can elucidate the internal structures and material properties. These methods have been used in combination for the simulation of a set of vertebrae or segments of the human spine [7].…”

Section: Introductionmentioning

confidence: 99%

Establishment and Validation of a Computed Tomography–Based Finite Element Model of Lumbar3-5 Vertebrae

Xia¹,

Zhang²,

Chen³

et al. 2018

dtcse

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Objective: To describe a rapid method for establishing a finite element model of the lumbar vertebrae by using computed tomography (CT) images Methods: CT images of the L3-L5 vertebrae of a 75-year-old man were acquired and used to establish a finite element model using the Minics 10.01 and Hypermesh 11.0 softwares. Soft tissues, such as the intervertebral discs and ligaments, were manually meshed. The model thus generated was subjected to a vertical force of 400 N and a torsion force of 10 N·m to simulate the conditions of the human spine in the standing position. Results: The CT-based finite element model of the lumbar vertebrae was successfully established, accurately reflecting the anatomy of both vertebrae and attached soft tissues. The biomechanical response of the model to the external testing forces was within the accepted normal ranges. Conclusion: We constructed a feasible and accurate CT-based finite element model of the lumbar vertebrae with manually meshing of the soft tissue data. This model showed good consistency with in vitro experimental data. Thus, our method appeared to be useful in the construction of a finite element model of the spine.

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“…Computer‐aided design and manufacturing (CAD/CAM) of removable prostheses have been performed since the 1990s. Although digitalized construction and duplication procedure of complete dentures (36–38), knowledge‐based systems (39, 40), digitalized casts and surveying system (41), rapid prototyping system (42) for designing and construction of RPDs have been reported, a total CAD/CAM system for removable prostheses is yet to be developed. To utilize CAD/CAM in this field, we have to make an easy‐to‐handle system in which the process of traditional dental laboratory technique as well as rational design concepts can be digitalized on the computer.…”

Section: Introductionmentioning

confidence: 99%

Development of an RPD CAD system with finite element stress analysis

Kibi¹,

Ono

Dong³

et al. 2009

J of Oral Rehabilitation

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The structural design of removable partial dentures (RPDs) is critical for preventing distortion of the prosthesis, protecting abutment teeth and residual ridges as well as for high masticatory performance. The aim of this study was to clarify the feasibility and utility of a computer-aided designing (CAD) system with finite element analysis (FEA) for molar teeth arrangement in unilateral distal extension base RPDs. The shapes of artificial teeth and residual ridge were measured and converted into point group data. Solid models were created from surface-modelled point group data in a 3D surface CAD format. An occlusal rim was created on the residual ridge mucosa and the occlusal rim - residual ridge mucosa model with FEA function was created. Stress distribution on the residual ridge mucosa was compared by changing the loading point. The artificial teeth were then arranged in locations with the lowest amount of stress. After building an artificial teeth - saddle - residual ridge mucosa model, stress distribution in the residual ridge mucosa was re-evaluated by simulating occlusal force. On the occlusal rim - residual ridge mucosa model, stress was reduced when the loading point was located around the buccal shelf where functional cusps of artificial teeth were charted. It was confirmed that stress distribution in the residual ridge mucosa was equalized on the artificial teeth - saddle - residual ridge mucosa model. This system might be clinically useful tool for designing RPDs if FEA-guided designing of retainers and connectors can be added.

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Finite element model based on a mandibular cast and a waxed complete denture: Evaluation of the accuracy and the reproducibility of analysis

Abstract: We conclude that this method has sufficient measurement accuracy and reproducibility for the calculated movement of dentures.

Cited by 5 publications

References 10 publications

Biomechanics of oral mucosa

Biomechanics of oral mucosa

Establishment and Validation of a Computed Tomography–Based Finite Element Model of Lumbar3-5 Vertebrae

Development of an RPD CAD system with finite element stress analysis

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