scholarly journals Analysis of a force system for upper molar distalization using a trans-palatal arch and mini-implant: a finite element analysis study

2012 ◽  
Vol 35 (5) ◽  
pp. 628-633 ◽  
Author(s):  
S. Ueno ◽  
M. Motoyoshi ◽  
K. Mayahara ◽  
Y. Saito ◽  
Y. Akiyama ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Molar Distalization ◽  
Force System ◽  
Analysis Study ◽  
Upper Molar

scholarly journals Upper Second Molar Distalization with Clear Aligners: A Finite Element Study

2020 ◽  
Vol 10 (21) ◽  
pp. 7739
Author(s):  
Gabriele Rossini ◽  
Matteo Schiaffino ◽  
Simone Parrini ◽  
Ambra Sedran ◽  
Andrea Deregibus ◽  
...  
Keyword(s):  
Finite Element ◽  
Periodontal Ligament ◽  
Element Analysis ◽  
Molar Distalization ◽  
Force System ◽  
Second Molar ◽  
Maxillary Molar ◽  
Clinical Environments ◽  
Upper Molar ◽  
Element Study

Among orthodontists and scientists, in the last years, upper molar distalization has been a debated topic in the orthodontic aligner field. However, despite that few clinical studies have been published, no insights on aligners’ biomechanics regarding this movement are available. The aim of this study was to assess, through finite element analysis, the force system resulting in the upper arch during second maxillary molar distalization with clear aligners and variable attachments settings. The average tooth distalization was found to be 0.029, with buccal flaring of the upper incisors in all attachment configurations. The mesial deformation of the aligner was registered to be 0.2 mm on average. Different pressure areas on the interface between aligners and upper molars were registered, with the mesial attachment surface to be directly involved when present. Periodontal ligament pressure was reported to range between 67 g/cm2 and 132 g/cm2. Configurations with rectangular attachments from second molar-to-canine and from first molar-to-canine present, in an in silico environment, almost equal efficiency in distalizing the upper second molar. However, attachments from the second molar to the canine are suggested to be adopted in clinical environments due to greater feasibility in everyday practice.

scholarly journals Incisors Extrusion with Clear Aligners Technique: A Finite Element Analysis Study

2021 ◽  
Vol 11 (3) ◽  
pp. 1167
Author(s):  
Gabriele Rossini ◽  
Stefano Modica ◽  
Simone Parrini ◽  
Andrea Deregibus ◽  
Tommaso Castroflorio
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Clinical Trials ◽  
Good Option ◽  
Open Bite ◽  
Element Analysis ◽  
Posterior Teeth ◽  
Force System ◽  
Analysis Study ◽  
Low Level

Since the low level of available evidence and the limited number of studies do not clarify whether clear aligners are a good option for extrusion, finite element (FE) analyses were performed to obtain more accurate biomechanical data about open-bite treatment in the upper arch. The aim of this study is to answer three questions: Are aligners efficient in performing upper incisor extrusion? Does the number, position, and shape of attachments influence the force system? Is posterior anchorage preserved during incisor extrusion? Six different simulations were performed with different attachment patterns. The results of this study were consistent with the biomechanical information obtained from clinical trials, and highlighted the need of better knowing undesired forces during teeth movement with clear aligners. Some attachment configuration seems to lead to a better force system. The presence of rectangular horizontal attachments on the buccal or palatal surface of upper incisors in combination with rectangular vertical attachments on posterior teeth was found to produce the most efficient force system with minimal aligner deformation.

scholarly journals Morse taper performance: A finite element analysis study

Clinics ◽  
2019 ◽  
Vol 74 ◽  
Author(s):  
Gustavo Passarelli Petris ◽  
João Paulo De Carli ◽  
Luiz Renato Paranhos ◽  
Pâmela Letícia Santos ◽  
Paula Benetti ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Analysis Study
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