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Longitudinal eruptive and posteruptive tooth movements, studied on oblique and lateral cephalograms with implants.

Abstract The purpose of this study was to investigate the eruptive and posteruptive tooth displacements of untreated growing subjects longitudinally and the potential connections between posteruptive displacement of the maxillary and mandibular first molars and skeletal facial growth.
PMID
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Authors

Mayor MeshTerms

Molar

Tooth Eruption

Tooth Mobility

Keywords
Journal Title american journal of orthodontics and dentofacial orthopedics : official publication of the american association of orthodontists, its constituent societies, and the american board of orthodontics
Publication Year Start




PMID- 29706215
OWN - NLM
STAT- MEDLINE
DCOM- 20180510
LR  - 20180510
IS  - 1097-6752 (Electronic)
IS  - 0889-5406 (Linking)
VI  - 153
IP  - 5
DP  - 2018 May
TI  - Longitudinal eruptive and posteruptive tooth movements, studied on oblique and
      lateral cephalograms with implants.
PG  - 673-684
LID - S0889-5406(18)30056-8 [pii]
LID - 10.1016/j.ajodo.2017.08.023 [doi]
AB  - INTRODUCTION: The purpose of this study was to investigate the eruptive and
      posteruptive tooth displacements of untreated growing subjects longitudinally and
      the potential connections between posteruptive displacement of the maxillary and 
      mandibular first molars and skeletal facial growth. METHODS: The sample comprised
      11 series of right 45 degrees oblique cephalograms and lateral cephalograms of
      untreated children with metallic implants of the Bjork type obtained from the
      archives of a growth study. Cephalograms generated at approximately 2-year
      intervals between the ages of 8.5 and 16 years were selected and traced.
      Superimpositions of serial tracings of oblique cephalograms on stable
      intraosseous implants were made to determine the displacements of buccal segment 
      teeth in both arches, and superimpositions of serial tracings of lateral
      cephalograms were used to evaluate growth of the jaws. RESULTS: Continuous mesial
      tipping of the maxillary molars was observed from 8.5 to 16 years of age,
      averaging 8.2 degrees +/- 5.5 degrees for the first molars and 18.3 degrees +/-
      8.5 degrees for the second molars. Compared with the maxillary molars, the
      mandibular first molars showed less change in angulation except in the later
      mixed dentition when more than half of the subjects had accelerated forward
      tipping of the first molar in the late mixed dentition associated with migration 
      into the leeway space. Average amounts of cumulative eruption from 8.5 to 16
      years of age were 12.1 +/- 2.1 mm downward and 3.8 +/- 1.7 mm forward for the
      maxillary first molar. The mandibular first molar showed 8.6 +/- 2.3 mm of
      eruption and 4.4 +/- 1.9 mm of mesial migration. Peak velocity of vertical
      eruption of the maxillary and mandibular first molars corresponded to the
      skeletal vertical growth spurt. The maxillary canines and first premolars showed 
      remarkable and continuous uprighting migration during eruption, averaging 9.5
      degrees +/- 5.0 degrees and 10.5 degrees +/- 6.7 degrees , respectively. However,
      when they erupted into the occlusion, their changes in angulation reverted to
      forward tipping. The same tendency was also found in the mandibular canines and
      first premolars. CONCLUSIONS: Remarkable eruption and migration occur to the
      teeth of both arches during childhood and adolescence. Rates of first molar
      eruption during adolescence follow the general pattern of somatic growth. We
      infer that maintaining the original distal crown angulation of the maxillary
      molars may be an effective protocol for preservation of anchorage.
CI  - Copyright (c) 2018 American Association of Orthodontists. Published by Elsevier
      Inc. All rights reserved.
FAU - Zhang, Xiaoyun
AU  - Zhang X
AD  - Department of Orthodontics, Peking University School and Hospital of Stomatology,
      Beijing, China.
FAU - Baumrind, Sheldon
AU  - Baumrind S
AD  - Department of Orthodontics and Craniofacial Research Instrumentation Laboratory, 
      School of Dentistry, University of the Pacific, San Francisco, Calif.
FAU - Chen, Gui
AU  - Chen G
AD  - Department of Orthodontics, Peking University School and Hospital of Stomatology,
      Beijing, China.
FAU - Chen, Huizhong
AU  - Chen H
AD  - Department of Orthodontics, Peking University School and Hospital of Stomatology,
      Beijing, China.
FAU - Liang, Yi
AU  - Liang Y
AD  - Department of Orthodontics, Peking University School and Hospital of Stomatology,
      Beijing, China.
FAU - Xu, Tianmin
AU  - Xu T
AD  - Department of Orthodontics, Peking University School and Hospital of Stomatology,
      Beijing, China. Electronic address: [email protected]
LA  - eng
PT  - Journal Article
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  - D
SB  - IM
MH  - Adolescent
MH  - Cephalometry
MH  - Child
MH  - Facial Bones/*growth & development
MH  - Female
MH  - Humans
MH  - Male
MH  - Mandible
MH  - Maxilla
MH  - *Molar
MH  - *Tooth Eruption
MH  - *Tooth Mobility
EDAT- 2018/05/01 06:00
MHDA- 2018/05/11 06:00
CRDT- 2018/05/01 06:00
PHST- 2017/03/01 00:00 [received]
PHST- 2017/08/01 00:00 [revised]
PHST- 2017/08/01 00:00 [accepted]
PHST- 2018/05/01 06:00 [entrez]
PHST- 2018/05/01 06:00 [pubmed]
PHST- 2018/05/11 06:00 [medline]
AID - S0889-5406(18)30056-8 [pii]
AID - 10.1016/j.ajodo.2017.08.023 [doi]
PST - ppublish
SO  - Am J Orthod Dentofacial Orthop. 2018 May;153(5):673-684. doi:
      10.1016/j.ajodo.2017.08.023.