Bilinear elastic property of the periodontal ligament for simulation using a finite element mandible model

Borák, Libor; Florian, Zdeněk; Bartáková, Sonia; Prachár, Patrik; Murakami, Natsuko; Ona, Masahiro; Igarashi, Yoshimasa; Wakabayashi, Noriyuki

doi:10.4012/dmj.2010-170

Cited by 14 publications

(9 citation statements)

References 24 publications

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“…Katona & Qian [29]). The tooth root is surrounded by a uniform layer to represent the PDL, which is in turn surrounded by another uniform layer to represent the alveolar bone, both 0.2 mm thick [29], [32]. The tooth, PDL and alveolar bone components were then surrounded by a block to represent the mandibular bone.…”

Section: Methodsmentioning

confidence: 99%

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The Biomechanical Function of Periodontal Ligament Fibres in Orthodontic Tooth Movement

et al. 2014

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Orthodontic tooth movement occurs as a result of resorption and formation of the alveolar bone due to an applied load, but the stimulus responsible for triggering orthodontic tooth movement remains the subject of debate. It has been suggested that the periodontal ligament (PDL) plays a key role. However, the mechanical function of the PDL in orthodontic tooth movement is not well understood as most mechanical models of the PDL to date have ignored the fibrous structure of the PDL. In this study we use finite element (FE) analysis to investigate the strains in the alveolar bone due to occlusal and orthodontic loads when PDL is modelled as a fibrous structure as compared to modelling PDL as a layer of solid material. The results show that the tension-only nature of the fibres essentially suspends the tooth in the tooth socket and their inclusion in FE models makes a significant difference to both the magnitude and distribution of strains produced in the surrounding bone. The results indicate that the PDL fibres have a very important role in load transfer between the teeth and alveolar bone and should be considered in FE studies investigating the biomechanics of orthodontic tooth movement.

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Section: Methodsmentioning

confidence: 99%

“…This value would seem reasonable when compared to the vertical intrusion of 0.12 mm cited by Borák et al . [32] from an experiment by Kato [41]. To get the same displacement for the solid PDL model, it was found necessary to use a Young's modulus value of 12.2 MPa for the PDL layer (determined through the ANSYS optimisation facility).…”

Section: Methodsmentioning

confidence: 99%

The Biomechanical Function of Periodontal Ligament Fibres in Orthodontic Tooth Movement

et al. 2014

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“…The volume shell is then subtracted from the alveolar bone in order to define the PDL volume [24]. Finally, the bone modelling process has been performed by taking into account the division between cancellous and cortical bone, which has a mean thickness value of 0.25 mm around the teeth socket [25]. The bone volume, obtained by segmenting CBCT data, has been divided into two different regions, assuming an external layer with a 0.25 mm thickness as cortical bone and the inner part as cancellous bone (Figure 4).…”

Section: Reconstruction Of Patient-specific Anatomical Modelsmentioning

confidence: 99%

Computer aided modelling to simulate the biomechanical behaviour of customised orthodontic removable appliances

Barone

Paoli

Razionale

et al. 2014

Int J Interact Des Manuf

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In the field of orthodontics, the use of Removable\ud Thermoplastic Appliances (RTAs) to treat moderate malocclusion\ud problems is progressively replacing traditional fixed\ud brackets. Generally, these orthodontic devices are designed\ud on the basis of individual anatomies and customised requirements.\ud However, many elements may affect the effectiveness\ud of a RTA-based therapy: accuracies of anatomical reference\ud models, clinical treatment strategies, shape features\ud and mechanical properties of the appliances. In this paper, a\ud numerical model for customised orthodontic treatments planning\ud is proposed by means of the finite element method.\ud The model integrates individual patient’s teeth, periodontal\ud ligaments, bone tissue with structural and geometrical\ud attributes of the appliances. The anatomical tissues are reconstructed\ud by a multi-modality imaging technique, which combines\ud 3D data obtained by an optical scanner (visible tissues)\ud and a computerised tomography system (internal tissues).\ud The mechanical interactions between anatomical shapes and\ud appliance models are simulated through finite element analyses.\ud The numerical approach allows a dental technician to\ud predict how the RTA attributes affect tooth movements. In\ud this work, treatments considering rotation movements for a\ud maxillary incisor and a maxillary canine have been analysed\ud by using multi-tooth models

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“…El modelo geométrico del diente y sus tejidos circundantes en el maxilar inferior se crearon por medio del programa de diseño asistido por computador CAD de Solidworks®, versión 2013, a partir de imágenes médicas y de medidas tomadas con calibrador de un diente real, tejidos blandos y hueso. El periodonto tiene dos porciones fibrosas: el ligamento periodontal y la unión cemento-dentina, estructuras que soportan y distribuyen las cargas (6,12,13,16). Se seleccionó la dentina como estructura del modelo que se iba a analizar, debido a que hace parte de las estructuras de apoyo de las fuerzas oclusales.…”

Section: Especificación De La Geometríaunclassified

“…Adicionalmente, la fuerza oclusal puede variar en diferentes regiones del arco. Entre tanto, no es sorprendente que los datos de los valores de las fuerzas oclusales sea variable, ya que el complejo de la oclusión se encuentra en un movimiento dinámico (12)(13)(14)(15)(16)(17). Se consideró necesario realizar un estudio para analizar la anatomía, la magnitud y la dirección dentro del sistema estomatognático, a fin de sugerir los posibles efectos deletéreos relacionados con las fuerzas excesivas generadas en parafunción en la cavidad oral.…”

Section: Introductionunclassified

Efecto de las fuerzas oclusales sobre el periodonto analizado por elementos finitos / Effect of occlusal forces over periodontium analyzed through finite elements

2016

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ABSTRACT. Background: Biomechanical effects of occlusal loads on teeth during clenching and in mastication have been evaluated. A harmful consequence of occlusal overload is tooth fracture, which has been analyzed through methods such as electrical tests, photo elasticity, and finite elements. Although there are numerous studies linking periodontal disease and occlusion, the biomechanical role of the forces exerted on the periodontium has not been studied enough. Objective: To evaluate the effect of normal and harmful occlusal forces on the periodontium through finite elements. Methods: The finite element analysis included the following steps: specification of geometry, element type, and material properties and force magnitudes in Newton’s (from 150 N to 675 N using 25 N increments) on the longitudinal axis of the tooth. Results: There was a statistically significant difference between the stress distribution in periodontal ligament, cortical bone, and dentine according to tooth type (p = 0.000), but not significant differences were observed in cancellous bone (p = 0.166). Conclusion: The concentration of stress was located in the three teeth, incisor, premolar, and molar, in the buccal cervical area where most stress distribution was evident in all magnitudes of force applied.

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Bilinear elastic property of the periodontal ligament for simulation using a finite element mandible model

Cited by 14 publications

References 24 publications

The Biomechanical Function of Periodontal Ligament Fibres in Orthodontic Tooth Movement

The Biomechanical Function of Periodontal Ligament Fibres in Orthodontic Tooth Movement

Computer aided modelling to simulate the biomechanical behaviour of customised orthodontic removable appliances

Efecto de las fuerzas oclusales sobre el periodonto analizado por elementos finitos / Effect of occlusal forces over periodontium analyzed through finite elements

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