Torque Control of Upper Incisor in Intrusive Loads and Comparison of the Lingual and Labial Bracket Systems: A Finite Element Analysis

2015 ◽  
Vol 101 (2) ◽  
Author(s):  
Allahyar Geramy Sedigheh Sheikhzadeh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Torque Control ◽  
Element Analysis

scholarly journals Optimal Position of Attachment for Removable Thermoplastic Aligner on the Lower Canine Using Finite Element Analysis

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3369 ◽  
Author(s):  
Won-Hyeon Kim ◽  
Kyoungjae Hong ◽  
Dohyung Lim ◽  
Jong-Ho Lee ◽  
Yu Jung ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Shape ◽  
Torque Control ◽  
Element Analysis ◽  
Optimal Position ◽  
Tooth Shape ◽  
Lingual Side ◽  
Lower Canine ◽  
Recent Developments

Malocclusion is considered as a developmental disorder rather than a disease, and it may be affected by the composition and proportions of masseter muscle fibers. Orthodontics is a specialty of dentistry that deals with diagnosis and care of various irregular bite and/or malocclusion. Recent developments of 3D scanner and 3D printing technology has led to the use of a removable thermoplastic aligner (RTA), which is widely used due to its aesthetic excellence, comfortableness, and time efficiency. However, orthodontics using only an RTA has lower treatment efficacy and accuracy due to the differing movement of teeth from the plan. In order to improve these disadvantages, attachments were used, and biomechanical analyses were performed with and without them. However, there is insufficient research on the movement of teeth and the transfer of load according to the attachment position and shape. Therefore, in our study, we aimed to identify the optimal shape and position of attachments by analyzing various shapes and positions of attachments. Through 3D finite element analysis (FEA), simple tooth shape and mandibular canine shape were extracted in order to construct the orthodontics model which took into account the various shapes and positions of attachments. The optimal shape of a cylinder was derived through the FEA of simple tooth shape and analyzing various positions of attachments on teeth revealed that fixing the attachments at the lingual side of the tooth rather than the buccal side allowed for torque control and an effective movement of the teeth. Therefore, we suggest fixing the attachments at the lingual side rather than the buccal side of the tooth to induce effective movement of teeth in orthodontic treatment with the RTA in case of canine teeth.

Optimized bolt tightening procedure for different tightening strategies—FEA study

2016 ◽  
Vol 231 (2) ◽  
pp. 236-249 ◽  
Author(s):  
Muhammad Abid ◽  
Ayesha Khan ◽  
Masroor Hussain ◽  
Hafiz Abdul Wajid
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Algorithm ◽  
Control Method ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Torque Control ◽  
Element Analysis ◽  
Pipe Joints ◽  
Bolted Flange

This paper presents results of detailed nonlinear finite element analysis of gasketed bolted flange pipe joints of different sizes (1, 4, 5, 6, 8, 10, 20 in.) of 900# pressure class for achieving proper preload close to the target stress values with and without considering yielding at bolt and flange and gasket crushing recommended by ASME and industrial guidelines for optimized performance using customized optimization algorithm. In addition, two strategies torque control method and stretch control method are used which is a normal practice in the industry.

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