Modeling viscoelastic behavior of periodontal ligament with nonlinear finite element analysis

Su, Ming-Zen; Chang, Hao-Hueng; Chiang, Yu‐Chih; Cheng, Jung-Ho; Fuh, Lih‐Jyh; Wang, Chen-Ying; Lin, Chang‐Ching

doi:10.1016/j.jds.2013.01.001

Cited by 38 publications

(33 citation statements)

References 17 publications

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“…Teeth and attachments were considered as a unique body with rigid stiffness behavior. The PDL was set as a hyperelastic material to simulate its real mechanical characteristics 14 as closely as possible. The difference in rigidity between enamel and dentin was not considered relevant for the study and was not set.…”

Section: Materials Properties (Table 1)mentioning

confidence: 99%

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Cortona¹,

Rossini

Parrini

et al. 2019

The Angle Orthodontist

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Objective: To evaluate, using the finite element method, the orthodontic rotational movement of a lower second premolar obtained with clear aligners, analyzing different staging and attachment configurations. Materials and Methods: A CAD model including a complete lower dental arch (with element 4.5 mesially rotated 308) and the corresponding periodontal ligaments, attachments, and aligner was designed and imported to finite element software. Starting from the CAD model, six projects were created to simulate the following therapeutic combinations for correcting element 4.5 position: (1) without attachments, (2) single attachment placed on the buccal surface of element 4.5, (3) three attachments placed on the buccal surfaces of teeth 4.4 to 4.6. For each project, both 1.28 and 38 of aligner activation were considered. Results: All the analyzed configurations revealed a clockwise rotation movement of element 4.5 on the horizontal plane. Models with attachments showed a greater tooth displacement pattern than models without attachments. Simulations with attachments and 38 of aligner activation exhibited the best performance concerning tooth movement but registered high stresses in the periodontal ligaments, far from the ideal stress levels able to produce tooth rotational movement. Conclusions: The model with a single attachment and 1.28 of aligner activation was the most efficient, followed by the three attachment model with the same degree of activation. Aligner activation should not exceed 1.28 to achieve better control of movement and reasonable stress in periodontal structures. (Angle Orthod. 2020;90:247-254.)

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Section: Materials Properties (Table 1)mentioning

confidence: 99%

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Cortona¹,

Rossini

Parrini

et al. 2019

The Angle Orthodontist

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“…However, ignoring the ligament oversimplifies the models and results in inaccurate stress and strain distributions on periodontium along with improbable tooth movements. 24,25 Recently, Tuna et al 26 simulated PDL as a contact model between the tooth and alveolar bone instead of a solidmeshed FE model with poor geometric morphology or very dense mesh. It was proposed that this model saves time and pre/post processing workforce, increases the accuracy and adds to the smoothness of interface stress distributions as well.…”

Section: Fea and Periodontal Ligamentmentioning

confidence: 99%

Finite element analysis: A boon to dentistry

Trivedi

2014

Journal of Oral Biology and Craniofacial Research

158

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a b s t r a c tThe finite element analysis (FEA) is an upcoming and significant research tool for biomechanical analyses in biological research. It is an ultimate method for modeling complex structures and analyzing their mechanical properties. In Implantology, FEA has been used to study the stress patterns in various implant components and also in the peri-implant bone. It is also useful for studying the biomechanical properties of implants as well as IntroductionThe finite element analysis (FEA) is an upcoming and significant research tool for biomechanical analyses in biological research. It is an ultimate method for modeling complex structures and analyzing their mechanical properties. FEA has now become widely accepted as a non-invasive and excellent tool for studying the biomechanics and the influence of mechanical forces on the biological systems. It enables the visualization of superimposed structures, and the stipulation of the material properties of anatomic craniofacial structures. 1 It also allows to establish the location, magnitude, and direction of an applied force, as it may also assign stress points that can be theoretically measured. 2 Further, as it does not affect the physical properties of the analyzed materials it is easily repeatable. 2,3The finite element method (FEM) is basically a numerical method of analyzing stresses and deformations in the structures of any given geometry. The structure is discretized into the so called 'finite elements' connected through nodes. The type, arrangement and total number of elements impact the accuracy of the results. 4 The steps followed are generally constructing a finite element model, followed by specifying appropriate material properties, loading and boundary conditions so that the desired settings can be accurately simulated. Various engineering software packages are available to model and simulate the structure of interest may be implants or jawbone. Previously, when FEA was used in dentistry, various simplified assumptions were made regarding modeling geometry, load, boundaries and material properties.5 Such assumptions inevitably affected the analytical results. In the human body, there are individual variations with respect to E-mail address: shilpa.knp@gmail.com.Available online at www.sciencedirect.com ScienceDirect journal homepage: www.e lsevier.com/locate/jobcr j o u r n a l o f o r a l b i o l o g y a n d c r a n i o f a c i a l r e s e a r c h 4 ( 2 0 1 4 ) 2 0 0 e2 0 3http://dx

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“…Even if the linear elastic model demonstrated to provide satisfying results for the simulation of the initial phase of the orthodontic movement [7], the adoption of a more complex model guarantees more realistic results. In this paper, the volumetric finite strain viscoelastic model has been implemented as proposed by [26]. The viscoelastic parameters were obtained through an inverse parameter identification process.…”

Section: Mechanical Propertiesmentioning

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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Modeling viscoelastic behavior of periodontal ligament with nonlinear finite element analysis

Cited by 38 publications

References 17 publications

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study

Finite element analysis: A boon to dentistry

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

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