scholarly journals Apical Force Distribution due to Orthodontic Forces: A Finite Element Study

2011 ◽  
Vol 12 (2) ◽  
pp. 104-108 ◽  
Author(s):  
Anirudh K Mathur ◽  
Anirban Sarmah ◽  
Vinaya S Pai ◽  
G Chandrashekar
Keyword(s):  
Finite Element ◽  
Periodontal Ligament ◽  
Root Apex ◽  
Force Distribution ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Finite Element Study ◽  
Bodily Movement ◽  
Orthodontic Forces ◽  
Element Study

ABSTRACT Aim This finite element study was conducted to calculate the distribution of stresses in the periodontal ligament when various orthodontic forces were applied, with emphasis on the effect on root apex. Materials and methods An in vitro finite element method was used to construct a three-dimensional finite element model of a maxillary central incisor, its periodontal ligament and alveolar bone was constructed on the basis of average anatomic morphology. To this model, five types of orthodontic forces namely tipping, bodily movement, intrusion, extrusion and rotations were applied at various points on the crown of the tooth model. After the application of the forces, initial stress and initial displacements of the periodontal ligament were evaluated. The principal stress obtained on the periodontal ligament due to various orthodontic loadings on the maxillary central incisor was analyzed using ANSYS 10 finite element software. Results It showed that the greatest amount of relative stress at the apex of maxillary central incisor occurred with intrusion, extrusion and rotation. Bodily movement and tipping forces produce stress concentrated at the alveolar crest and not at the root apex. Conclusion Clinical implications of this study suggest that if the clinician is concerned about placing heavy stresses on the root apex, then vertical and rotational forces must be applied with caution. Clinical Significance If heavy stresses are to be placed on the root apex, then vertical and rotational forces must be applied with caution during orthodontic therapy. How to cite this article Mathur AK, Gupta V, Sarmah A, Pai VS, Chandrashekar G. Apical Force Distribution due to Orthodontic Forces: A Finite Element Study. J Contemp Dent Pract 2011;12(2):104-108.

scholarly journals An Evaluation of the Stress Pattern Distribution for Orthodontic Tooth Movements – A Finite Element Study

2015 ◽  
Vol 03 (02) ◽  
pp. 091-096 ◽  
Author(s):  
Sameer Gupta ◽  
Garima Gupta ◽  
Manisha Sharma ◽  
Pooja Sharma ◽  
Sachin Goyal ◽  
...  
Keyword(s):  
Periodontal Ligament ◽  
Root Apex ◽  
Stress Pattern ◽  
Clinical Implications ◽  
Central Incisor ◽  
Fem Model ◽  
3 Dimensional ◽  
Bodily Movement ◽  
Pattern Distribution ◽  
Element Study

Abstract Objectives: This study was conducted to evaluate stress pattern distribution in the periodontal ligament during various orthodontic tooth movements. Methods: A 3 dimensional FEM model of upper central incisor was developed from C.T scan images of the skull excluding the mandible. The principal stress obtained on the periodontal ligament due to various orthodontic loadings (tipping, bodily movement, intrusion, extrusion and rotations) were tested. Results: Intrusion, extrusion and rotation produced stresses concentrated at apex of root. Bodily movement and tipping forces produce stress concentrated at the alveolar crest and not at the root apex. Conclusion: Clinical implications of this study suggests that if the clinician is concerned about placing heavy stresses on the root apex then vertical and rotational forces must be applied with caution.

scholarly journals A Comparative Evaluation of Stress Distribution by Three Different Designs of Prefabricated Metal Posts on Endodontically Treated Permanent Maxillary Central Incisor: A Three-dimensional Finite Element Study

2015 ◽  
Vol 5 (3) ◽  
pp. 123-130
Author(s):  
Jyoti Nadgere ◽  
Ganesh Pandurang Mengal
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Comparative Evaluation ◽  
Three Dimensional ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Finite Element Study ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Study

ABSTRACT Purpose of the study: This study intends to evaluate and compare the stress distribution by three designs of prefabricated metal posts, parallel post (EG post), parallel post with coronal flare (i-post) and a tapered post (Filpost) in endodontically treated permanent maxillary central incisor. This study will help the dentists to choose the post that would generate the least stress in endodontically treated teeth. Procedure Three-dimensional (3D) finite element models were developed. The physical models include composite resin core material, dentin, endodontic post, luting cement and guttapercha. They were subjected to compressive load of 100 N at 135° angle with respect to longitudinal axis of tooth, above the level of cingulum, simulating the load condition in oral cavity and the effects of three posts on stress distribution, in endodontically treated maxillary central incisor was evaluated. Results Stress distribution was found to be better in the models having parallel post and parallel post with the coronal flare. Coronal flare has an added advantage of better fit in the root canal. Conclusion It was found that the stresses in maxillary central incisor with the parallel post with coronal flare were well distributed. How to cite this article Mengal GP, Nadgere J, Ram SM, Shah N. A Comparative Evaluation of Stress Distribution by Three Different Designs of Prefabricated Metal Posts on Endodontically Treated Permanent Maxillary Central Incisor: A Three-dimensional Finite Element Study. J Contemp Dent 2015;5(3):123-130.

scholarly journals Biomechanical Reactions due to Orthodontic Forces. A Finite Element Study

2015 ◽  
Vol 19 ◽  
pp. 895-900 ◽  
Author(s):  
Cristina Bica ◽  
Ligia Brezeanu ◽  
Dorin Bica ◽  
Mircea Suciu
Keyword(s):  
Finite Element ◽  
Finite Element Study ◽  
Orthodontic Forces ◽  
Element Study

scholarly journals Analysis of Stress in the Periodontal Ligament and Alveolar Bone of the Maxillary First Molars during Intrusion with Microscrew Implants: A 3D Finite Element Study

2014 ◽  
Vol 5 (1) ◽  
pp. 11-16 ◽  
Author(s):  
AS Pavithra ◽  
GS Prashanth ◽  
SE Shekar
Keyword(s):  
Finite Element ◽  
Periodontal Ligament ◽  
Maximum Stress ◽  
Alveolar Bone ◽  
Root Surface ◽  
3D Finite Element ◽  
Finite Element Study ◽  
Palatal Implant ◽  
Transpalatal Arch ◽  
Element Study

ABSTRACT Objectives The objective of this study was to graphically display the pattern and magnitude of stress distribution along the periodontal ligament and the alveolar bone of upper first molars on application of intrusive forces using microscrew implants. Materials and methods A computer simulation of threedimensional model of maxillary first molars and second molars bilaterally with their periodontal ligament and alveolar bone, with microscrew implants, force element and a transpalatal arch were constructed on the basis of average anatomic morphology. Finite element analysis was done to evaluate the amount of stress and its distribution during orthodontic intrusive force. Results Overall maximum stress in this study was seen in the alveolar bone in the implant insertion area of 7.155 N/mm2. Maximum stress in the periodontal ligament was seen in middle third distocervical palatal root surface of the first molar (0.008993 N/mm2). Maximum stress in the enamel was seen in the distal aspect of the cementoenamel junction (0.423 N/mm2). Maximum stress in the dentin was observed in apical one-third of the mesiobuccal root surface of first molar (0.1785 N/mm2). Conclusion In this study with the use of palatal implant and transpalatal arch, we found that there was no tipping observed during intrusion. This study demonstrates that significant true intrusion of maxillary molars could be obtained in a wellcontrolled manner by using fixed appliances with microscrew implant as bony anchorage. How to cite this article Pavithra AS, Prashanth GS, Mathew S, Shekar SE. Analysis of Stress in the Periodontal Ligament and Alveolar Bone of the Maxillary First Molars during Intrusion with Microscrew Implants: A 3D Finite Element Study. World J Dent 2014;5(1):11-16.

scholarly journals The effect of vertical bracket positioning on torque and the resultant stress in the periodontal ligament—a finite element study

2014 ◽  
Vol 15 (1) ◽  
Author(s):  
Ahmadreza Sardarian ◽  
Shahla Momeni danaei ◽  
Shoaleh Shahidi ◽  
Sahar Ghodsi Boushehri ◽  
Allahyar Geramy
Keyword(s):  
Finite Element ◽  
Periodontal Ligament ◽  
Finite Element Study ◽  
Resultant Stress ◽  
Bracket Positioning ◽  
Element Study
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