Evaluation of the Stress Induced in Tooth, Periodontal Ligament &amp; Alveolar Bone with Varying Degrees of Bone Loss During Various Types of Orthodontic Tooth Movements

Agarwal, Anupam; Mahajan, Shalu; Verma, Santosh Kumar; Bhardwaj, Preeti; Sharma, Geeta

doi:10.7860/jcdr/2016/17206.7235

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…In general, the tooth displacements, induced by several types of mechanics, are always greater in models with reduced bone support. Most of the related studies have tested the application of simple force systems in single tooth models 6,18,29‐32 . Furthermore, all of the previous FE studies used homogeneous, linear elastic, isotropic and continuous material properties to describe the PDL, with the exception of one study in which a patient‐customized 3D model of a periodontally reduced dentition with different PDL parameters was assessed 13 .…”

Section: Discussionmentioning

confidence: 99%

“…6,13,18,29 Several finite element studies have been conducted to analyse the patterns of tooth displacements associated with different amounts of alveolar bone support. 6,13,18,[29][30][31][32] In general, the tooth displacements, induced by several types of mechanics, are always greater in models with reduced bone support. Most of the related studies have tested the application of simple force systems in single tooth models.…”

Section: Ta B L Ementioning

confidence: 99%

“…Most of the related studies have tested the application of simple force systems in single tooth models. 6,18,[29][30][31][32] Furthermore, all of the previous FE studies used homogeneous, linear elastic, isotropic and continuous material properties to describe the PDL, with the exception of one study in which a patient-customized 3D model of a periodontally reduced dentition with different PDL parameters was assessed. 13 In that study, two mechanical scenarios for intrusion were investigatedthe first using the three-piece base arch appliance, and the second using cantilevers for single tooth intrusion.…”

Section: Ta B L Ementioning

confidence: 99%

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Individualization of the three‐piece base arch mechanics according to various periodontal support levels: A finite element analysis

Gameiro

Bocchiardo

Dalstra

et al. 2020

Orthod Craniofacial Res

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Introduction The orthodontic correction of periodontally compromised dentitions constitutes a huge challenge in the clinical practice of adult orthodontics. The biological and physical distinct features of these conditions require a carefully designed mechanical plan for the successful treatment of these complex cases. Setting and Sample Population A segment of a human maxilla containing the central and lateral incisors, obtained from autopsy, was scanned with microcomputed tomography, and a finite element (FE) model was generated to represent an intact periodontal dentition. Based on this model, three additional models simulating a mild, moderate and severe bone alveolar loss were created as well. Materials and Methods Two loading scenarios for the application of intrusive and retraction mechanics with a three‐piece base arch appliance were evaluated in a series of FE analyses. The tooth displacements and strains in the periodontal ligament (PDL) were calculated and compared for the four FE models. Results The periodontal reduced dentitions exhibited a similar axis of resistance for intrusive mechanics, but the axis of resistance for retraction movements was significantly dependent on the degree of alveolar bone loss. The tooth displacements and PDL loads were higher in the reduced dentitions for both intrusive and retraction mechanics. Conclusions A reduction in the force levels applied to periodontal reduced dentitions is indicated, and a customized selection of appropriate points of force application is needed according to the specific amount of alveolar bone loss.

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Section: Discussionmentioning

confidence: 99%

Section: Ta B L Ementioning

confidence: 99%

Section: Ta B L Ementioning

confidence: 99%

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Individualization of the three‐piece base arch mechanics according to various periodontal support levels: A finite element analysis

Gameiro

Bocchiardo

Dalstra

et al. 2020

Orthod Craniofacial Res

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“…Under such circumstances, the resistance and rotation centre of the tooth, as well as the orthodontic movement mechanisms, change. Therefore, a correct decision regarding an orthodontic treatment in such conditions, without the emergence of iatrogenic effects, requires an extremely thorough biomechanical analysis [5][6][7][8][9].…”

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confidence: 99%

Analytical Methods and Finite Element Method Computation The dental - periodontal tissues response

Bică¹,

Martha²,

Bică³

et al. 2017

Mat.Plast.

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The study of the biomechanical behaviour of dental-periodontal structures during orthodontic movement has been carried out on the basis of the analysis of values of equivalent stress following Von Mises theory, of the stress after the direction of the sz vertical force, which constitutes the essential component of the Von Mises equivalent stress, as well as on the basis of registering the deformities on the tooth axis. The processes of implementation, modelling, calculation and interpretation, using FEM, involved the following steps: defining the geometry and the structure of the model under analysis; meshing the geometry of the structure; connecting the nodal elements; defining the limit conditions and restrictions; loading the created model with vertical forces of different intensities; solving the equation system, having as unknowns in the nodes the following: movement, tension, tension on the spatial coordinates, Von Mises stress. We simulated the orthodontic intrusion through the application of some vertical forces with different intensities and on structures with alveolar bone loss. The tension values in the tooth axis vary in direct proportion to the level of resorption of the alveolar bone, but the decisive element is the numerical value of the applied force, and not the absorption level.

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Tooth loss caused by displaced elastic during simple preprosthetic orthodontic treatment

Dianišková

Calzolari

Migliorati

et al. 2016

WJCC

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The use of elastics to close a diastema or correct tooth malpositions can create unintended consequences if not properly controlled. The American Association of Orthodontists recently issued a consumer alert, warning of “a substantial risk for irreparable damage” from a new trend called “do-it-yourself” orthodontics, consisting of patients autonomously using elastics to correct tooth position. The elastics can work their way below the gums and around the roots of the teeth, causing damage to the periodontium and even resulting in tooth loss. The cost of implants to replace these teeth would well exceed the cost of proper orthodontic care. This damage could also occur in a dental office, when a general dentist tries to perform a simplified orthodontic correction of a minor tooth malposition. The present case report describes a case of tooth loss caused by a displaced intraoral elastic, which occurred during a simple preprosthetic orthodontic treatment.

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Evaluation of the Stress Induced in Tooth, Periodontal Ligament & Alveolar Bone with Varying Degrees of Bone Loss During Various Types of Orthodontic Tooth Movements

Cited by 3 publications

References 13 publications

Individualization of the three‐piece base arch mechanics according to various periodontal support levels: A finite element analysis

Individualization of the three‐piece base arch mechanics according to various periodontal support levels: A finite element analysis

Analytical Methods and Finite Element Method Computation The dental - periodontal tissues response

Tooth loss caused by displaced elastic during simple preprosthetic orthodontic treatment

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