Three-dimensional Finite Element Analysis of the Cartilaginous Structures in the Human Temporomandibular Joint

Beek, Maarten; Koolstra, J.H.; Ruijven, L.J. van; Eijden, T.M.G.J. van

doi:10.1177/00220345010800101001

Cited by 85 publications

(58 citation statements)

References 24 publications

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“…The elastic characteristics of the material were taken from previous studies (Table 1) (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27). Mega-Pascal unit (MPa) was used to evaluate stress findings.…”

Section: Methodsmentioning

confidence: 99%

Dentofacial Effects of Fixed Functional Appliances with or without Mini Screw Anchorage in the Treatment of Class II Division I Malocclusion: A Finite Element Analysis

Akış

Doruk

2018

Turk J Orthod

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Objective: This study aimed to examine the biomechanical effects of the fixed functional appliances reinforced with miniscrews by finite elements analysis over the cranial and facial bones, temporomandibular joint, and maxillary-mandibular teeth, which are used for the treatment of Class II division 1 malocclusions characterized as mandibular retrognathia.Methods: Three-dimensional (3-D) models of the cranial, mandibular, and maxillary bones were purchased from a company that produces 3-D models of the bones. Simulations of Forsus, screwed Forsus, Twin-Force and screwed Twin-Force appliances were conducted on the 3 D models. The miniscrew was placed in the inter-radicular area between the upper canine and first upper premolar teeth.Results: It was observed in the models that the first upper molar tooth was the most affected. The compressive stress was observed in the anterior area of the mandibular condyle neck in the Forsus appliances; however, it was observed in the posterior area of the mandibular condyle neck in Twin-Force appliances. Conclusion:It was observed that molar distalization and expansion decreases in the functional appliances with the support of miniscrew. The highest tension rates were determined in the areas of condylar and articular discs.

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Section: Methodsmentioning

confidence: 99%

Dentofacial Effects of Fixed Functional Appliances with or without Mini Screw Anchorage in the Treatment of Class II Division I Malocclusion: A Finite Element Analysis

Akış

Doruk

2018

Turk J Orthod

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“…They can be estimated by mechanical analyses, thereby demonstrating that mathematical modeling methods are powerful tools. [14][15][16][17][18][19][20] Recently, the three-dimensional finite element method was used to estimate the stress distribution within the periodontal tissues, 21 although the stresses of the periodontally-compromised condition were not analyzed in relation to the bone height. The aim of this finite element study was to elucidate the effect of bone loss on the stresses within the periodontal ligament and alveolar bone of a premolar root with and without crown reconstruction.…”

Section: Finite Element Stress Analysis Of Overdenture Abutment As a mentioning

confidence: 99%

Finite Element Stress Analysis of Overdenture Abutment as a Function of Crown-to-root Ratio

Tanaka

Wakabayashi

Maezawa

et al. 2006

Prosthodont Res. Pract.

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In partially edentulous patients with considerable loss of tooth structure, it is recommended that a remaining tooth with a C/R ratio greater than approximately 1.5 should be used as an overdenture abutment to minimize lateral occlusal forces. Abstract Purpose:The clinical decision to use abutments for overdentures in cases with loss of tooth structure has not been fully assessed in relation to the periodontal condition. The aim of this study was to investigate the stresses around overdenture abutments with and without crown restoration for various bone heights.Methods: Three-dimensional finite element models of the mandibular right first and second premolars, a periodontal ligament, and one of five alveolar bone models of different heights were constructed. The crown-to-root ratios at the second premolar were 0.86 (Model A), 1.05 (Model B), 1.28 (Model C), 1.56 (Model D), and 1.96 (Model E). The second premolar root was also modeled without crown restoration. A single oblique load of 80 N at a 30-degree angle distal from the vertical axis was directed at the center of the occlusal or root surface of the second premolar. Results:The maximum stresses were observed at the distal cervical regions for all models. These increased as the crown-to-root ratio increased. The highest maximum stress in the cortical bone (35.8 MPa) was observed in Model E with crown restoration. In the regions near the overdenture abutments, the maximum stresses in the bone and the periodontal ligament were 33.9% to 61.7% lower than those observed near the crown restorations. Conclusion:The use of the premolar as an overdenture abutment in cases with loss of tooth structure can effectively sustain the stress in the periodontal tissues, particularly under conditions of reduced bone height.

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“…Bioengineers worldwide have made major strides in modeling the TMJ, with major contributions from groups in Japan, 78,[89][90][91][92][93][94][95][96][97][98] the Netherlands, [14][15][16][53][54][55][56][57][58][59][60]102 Spain, [73][74][75][76] and Switzerland. 34,35,61 An excellent review of TMJ biomechanical models was provided by Koolstra 53 in 2003, and significant progress has been made since then by the aforementioned groups and others.…”

Section: Directives From the Clinical Communitymentioning

confidence: 99%

A Call to Action for Bioengineers and Dental Professionals: Directives for the Future of TMJ Bioengineering

2007

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Abstract-The world's first TMJ Bioengineering Conference was held May 25-27, 2006, in Broomfield, Colorado. Presentations were given by 34 invited speakers representing industry, academics, government agencies such as NIH, and private practice, which included surgeons, engineers, biomedical scientists, and patient advocacy leaders. Other attendees included documentary film makers and FDA officials. The impetus for the conference was that the field of TMJ research has been lacking continuity, with no open forum available for surgeons, scientists, and bioengineers to exchange scientific and clinical ideas and identify common goals, strengths, and capabilities. The goal was thus to plant the seeds for establishing a forum for multidisciplinary and interdisciplinary interactions. The collective wisdom and interactions brought about by a melting pot of these diverse individuals has been pooled and is disseminated in this article, which offers specific directives to bioengineers, basic scientists, and medical and dental professionals including oral and maxillofacial surgeons, pain specialists, orthodontists, prosthodontists, endocrinologists, rheumatologists, immunologists, radiologists, neurologists, and orthopaedic surgeons. A primary goal of this article was to attract researchers across a breadth of research areas to lend their expertise to a significant clinical problem with a dire need for new talent. For example, researchers with expertise in finite element modeling will find an extensive list of clinically significant problems. Specific suggestions for TMJ research were presented by the leading organizations for TMJ surgeons and TMJ patients, and further research needs were identified in a series of group discussions. The specific needs identified at the conference and presented here will be essential for those who endeavor to engage in TMJ research, especially in the areas of tissue engineering and biomechanics. Collectively, it is our hope that many of the questions and directives presented here find their way into the proposals of multidisciplinary teams across the world with new and promising approaches to diagnose, prevent and treat TMJ disorders.

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Three-dimensional Finite Element Analysis of the Cartilaginous Structures in the Human Temporomandibular Joint

Cited by 85 publications

References 24 publications

Dentofacial Effects of Fixed Functional Appliances with or without Mini Screw Anchorage in the Treatment of Class II Division I Malocclusion: A Finite Element Analysis

Dentofacial Effects of Fixed Functional Appliances with or without Mini Screw Anchorage in the Treatment of Class II Division I Malocclusion: A Finite Element Analysis

Finite Element Stress Analysis of Overdenture Abutment as a Function of Crown-to-root Ratio

A Call to Action for Bioengineers and Dental Professionals: Directives for the Future of TMJ Bioengineering

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