Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis
Abstract Background The purpose of this study was to compare the stress distribution and displacement patterns of the one versus two maxillary molars distalization with iPanda and to evaluate the biomechanical effect of distalization on the iPanda using the finite element method. Methods The finite...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
SpringerOpen
2021-05-01
|
Series: | Progress in Orthodontics |
Subjects: | |
Online Access: | https://doi.org/10.1186/s40510-021-00356-6 |
id |
doaj-486c6093417345ed97a57f50ec450d04 |
---|---|
record_format |
Article |
spelling |
doaj-486c6093417345ed97a57f50ec450d042021-05-09T11:03:17ZengSpringerOpenProgress in Orthodontics2196-10422021-05-0122111010.1186/s40510-021-00356-6Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysisKamontip Sujaritwanid0Boonsiva Suzuki1Eduardo Yugo Suzuki2Department of Orthodontics, Faculty of Dentistry, Bangkokthonburi UniversityDepartment of Orthodontics, Faculty of Dentistry, Bangkokthonburi UniversityDepartment of Orthodontics, Faculty of Dentistry, Bangkokthonburi UniversityAbstract Background The purpose of this study was to compare the stress distribution and displacement patterns of the one versus two maxillary molars distalization with iPanda and to evaluate the biomechanical effect of distalization on the iPanda using the finite element method. Methods The finite element models of a maxillary arch with complete dentition, periodontal ligament, palatal and alveolar bone, and an iPanda connected to a pair of midpalatal miniscrews were created. Two models were created to simulate maxillary molar distalization. In the first model, the iPanda was connected to the second molar to simulate a single molar distalization. In the second model, the iPanda was connected to the first molar to simulate “en-masse” first and second molar distalization. A varying force from 50 to 200 g was applied. The stress distribution and displacement patterns were analyzed. Results For one molar, the stress was concentrated at the furcation and along the distal surface in all roots with a large amount of distalization and distobuccal crown tipping. For two molars, the stress in the first molar was 10 times higher than in the second molar with a great tendency for buccal tipping and a minimal amount of distalization. Moreover, the stress concentration on the distal miniscrew was six times higher than in the mesial miniscrew with an extrusive and intrusive vector, respectively. Conclusions Individual molar distalization provides the most effective stress distribution and displacement patterns with reduced force levels. In contrast, the en-masse distalization of two molars results in increased force levels with undesirable effects in the transverse and vertical direction.https://doi.org/10.1186/s40510-021-00356-6Class II malocclusionFinite element methodMaxillary molar distalizationMiniscrew |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kamontip Sujaritwanid Boonsiva Suzuki Eduardo Yugo Suzuki |
spellingShingle |
Kamontip Sujaritwanid Boonsiva Suzuki Eduardo Yugo Suzuki Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis Progress in Orthodontics Class II malocclusion Finite element method Maxillary molar distalization Miniscrew |
author_facet |
Kamontip Sujaritwanid Boonsiva Suzuki Eduardo Yugo Suzuki |
author_sort |
Kamontip Sujaritwanid |
title |
Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis |
title_short |
Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis |
title_full |
Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis |
title_fullStr |
Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis |
title_full_unstemmed |
Comparison of one versus two maxillary molars distalization with iPanda: a finite element analysis |
title_sort |
comparison of one versus two maxillary molars distalization with ipanda: a finite element analysis |
publisher |
SpringerOpen |
series |
Progress in Orthodontics |
issn |
2196-1042 |
publishDate |
2021-05-01 |
description |
Abstract Background The purpose of this study was to compare the stress distribution and displacement patterns of the one versus two maxillary molars distalization with iPanda and to evaluate the biomechanical effect of distalization on the iPanda using the finite element method. Methods The finite element models of a maxillary arch with complete dentition, periodontal ligament, palatal and alveolar bone, and an iPanda connected to a pair of midpalatal miniscrews were created. Two models were created to simulate maxillary molar distalization. In the first model, the iPanda was connected to the second molar to simulate a single molar distalization. In the second model, the iPanda was connected to the first molar to simulate “en-masse” first and second molar distalization. A varying force from 50 to 200 g was applied. The stress distribution and displacement patterns were analyzed. Results For one molar, the stress was concentrated at the furcation and along the distal surface in all roots with a large amount of distalization and distobuccal crown tipping. For two molars, the stress in the first molar was 10 times higher than in the second molar with a great tendency for buccal tipping and a minimal amount of distalization. Moreover, the stress concentration on the distal miniscrew was six times higher than in the mesial miniscrew with an extrusive and intrusive vector, respectively. Conclusions Individual molar distalization provides the most effective stress distribution and displacement patterns with reduced force levels. In contrast, the en-masse distalization of two molars results in increased force levels with undesirable effects in the transverse and vertical direction. |
topic |
Class II malocclusion Finite element method Maxillary molar distalization Miniscrew |
url |
https://doi.org/10.1186/s40510-021-00356-6 |
work_keys_str_mv |
AT kamontipsujaritwanid comparisonofoneversustwomaxillarymolarsdistalizationwithipandaafiniteelementanalysis AT boonsivasuzuki comparisonofoneversustwomaxillarymolarsdistalizationwithipandaafiniteelementanalysis AT eduardoyugosuzuki comparisonofoneversustwomaxillarymolarsdistalizationwithipandaafiniteelementanalysis |
_version_ |
1721454696721285120 |