PMID- 33736907
OWN - NLM
STAT- MEDLINE
DCOM- 20210602
LR  - 20210602
IS  - 1097-6752 (Electronic)
IS  - 0889-5406 (Linking)
VI  - 159
IP  - 6
DP  - 2021 Jun
TI  - Biomechanical analysis for total mesialization of the maxillary dentition: A 
      finite element study.
PG  - 790-798
LID - S0889-5406(21)00138-4 [pii]
LID - 10.1016/j.ajodo.2020.02.021 [doi]
AB  - INTRODUCTION: The purpose of this study was to analyze and clarify tooth movement 
      during mesialization of the whole maxillary dentition with various force 
      angulations (FAs). METHODS: A finite element method was used to simulate the 
      long-term orthodontic movement of the maxillary dentition by accumulating the 
      initial displacement of teeth produced by elastic deformation of the periodontal 
      ligament. A mesial force of 3 N was applied to the maxillary second molar at 5 
      different FAs (-30 degrees , -15 degrees , 0 degrees , 15 degrees , and 30 degrees ) to the occlusal plane. RESULTS: At 
      an FA of 28 degrees , the line of action of the force passed through the center of 
      resistance of the maxillary whole dentition. With all FAs, the central incisors 
      and molars tipped labially and mesially, respectively. The tipping angles 
      gradually decreased as the FAs shifted from -30 degrees  to 30 degrees . The molars tipped 
      lingually with FAs of -30 degrees  and -15 degrees , whereas they tipped buccally with FAs of 0 degrees , 
      15 degrees , and 30 degrees . The molars tended to rotate mesiolingually more as the angle of 
      force increased toward an FA of 30 degrees . The occlusal plane rotated counterclockwise 
      with FAs of -30 degrees , -15 degrees , and 0 degrees , whereas it rotated clockwise with FAs of 15 degrees  and 
      30 degrees . With an FA of 30 degrees , buccal tipping and mesiolingual rotation of the molars, 
      and the change in the occlusal plane angle decreased when the transpalatal arch 
      (TPA) was fixed to the first molars and decreased, even more when the TPA was 
      fixed to the second molars rather than the first molars, when a thicker TPA was 
      used, and when the TPA was fixed to both molars rather than a single molar. 
      CONCLUSIONS: There was a correlation between tooth movement during mesialization 
      of the whole maxillary dentition and the angle at which the force was applied.
CI  - Copyright (c) 2021 American Association of Orthodontists. Published by Elsevier 
      Inc. All rights reserved.
FAU - Kawamura, Jun
AU  - Kawamura J
AD  - Private Practice, Gifu, Japan.
FAU - Park, Jae Hyun
AU  - Park JH
AD  - Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. 
      Still University, Mesa, Ariz; Graduate School of Dentistry, Kyung Hee University, 
      Seoul, South Korea.
FAU - Kojima, Yukio
AU  - Kojima Y
AD  - Private Practice, Nagoya, Japan.
FAU - Tamaya, Naohiko
AU  - Tamaya N
AD  - Private Practice, Fukui, Japan.
FAU - Kook, Yoon-Ah
AU  - Kook YA
AD  - Department of Orthodontics, Seoul St Mary's Hospital, Catholic University of 
      Korea, Seoul, South Korea.
FAU - Kyung, Hee-Moon
AU  - Kyung HM
AD  - Department of Orthodontics, School of Dentistry, Kyungpook National University, 
      Daegu, South Korea.
FAU - Chae, Jong-Moon
AU  - Chae JM
AD  - Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. 
      Still University, Mesa, Ariz; Department of Orthodontics, School of Dentistry, 
      Wonkwang Dental Research Institute, Wonkwang University, Iksan, South Korea. 
      Electronic address: jongmoon@wku.ac.kr.
LA  - eng
PT  - Journal Article
DEP - 20210315
PL  - United States
TA  - Am J Orthod Dentofacial Orthop
JT  - American journal of orthodontics and dentofacial orthopedics : official 
      publication of the American Association of Orthodontists, its constituent 
      societies, and the American Board of Orthodontics
JID - 8610224
SB  - IM
MH  - *Dentition
MH  - Finite Element Analysis
MH  - Humans
MH  - Maxilla
MH  - Molar
MH  - *Tooth
MH  - Tooth Movement Techniques
EDAT- 2021/03/20 06:00
MHDA- 2021/06/03 06:00
CRDT- 2021/03/19 06:10
PHST- 2019/07/01 00:00 [received]
PHST- 2020/01/01 00:00 [revised]
PHST- 2020/02/01 00:00 [accepted]
PHST- 2021/03/20 06:00 [pubmed]
PHST- 2021/06/03 06:00 [medline]
PHST- 2021/03/19 06:10 [entrez]
AID - S0889-5406(21)00138-4 [pii]
AID - 10.1016/j.ajodo.2020.02.021 [doi]
PST - ppublish
SO  - Am J Orthod Dentofacial Orthop. 2021 Jun;159(6):790-798. doi: 
      10.1016/j.ajodo.2020.02.021. Epub 2021 Mar 15.