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Factors affecting treatment duration of labial inversely impacted maxillary central incisors.

Abstract A labial inversely impacted maxillary central incisor is a relatively rare occurrence. The crown of the tooth is directed upward, and its palatal aspect is facing labially. This typical orientation can be the result of trauma to the deciduous incisor transmitted to the palatal side of the crown of the permanent incisor. Labial inversely impacted maxillary central incisors are most commonly combined with labial-lingual root dilacerations. The aim of this study was to examine factors that affect the surgical-orthodontic treatment duration of labial inversely impacted maxillary central incisors.
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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- 29706219
OWN - NLM
STAT- MEDLINE
DCOM- 20180510
LR  - 20180510
IS  - 1097-6752 (Electronic)
IS  - 0889-5406 (Linking)
VI  - 153
IP  - 5
DP  - 2018 May
TI  - Factors affecting treatment duration of labial inversely impacted maxillary
      central incisors.
PG  - 708-715
LID - S0889-5406(18)30095-7 [pii]
LID - 10.1016/j.ajodo.2017.09.017 [doi]
AB  - INTRODUCTION: A labial inversely impacted maxillary central incisor is a
      relatively rare occurrence. The crown of the tooth is directed upward, and its
      palatal aspect is facing labially. This typical orientation can be the result of 
      trauma to the deciduous incisor transmitted to the palatal side of the crown of
      the permanent incisor. Labial inversely impacted maxillary central incisors are
      most commonly combined with labial-lingual root dilacerations. The aim of this
      study was to examine factors that affect the surgical-orthodontic treatment
      duration of labial inversely impacted maxillary central incisors. METHOD: The
      records of 35 consecutively treated patients were retrospectively evaluated.
      Cone-beam computed tomography images were taken before treatment, and factors
      affecting treatment time, including age, length, crown-root angle, crown height
      and depth, angle of inversion, rotation to axial plane, and distance and angle to
      midline, were measured using Dolphin Imaging software (version 11.8; Patterson
      Supply, St Paul, Minn). Treatment duration was evaluated for each patient, and
      logistic regression analyses were applied. RESULTS: The 15 boys and 20 girls had 
      a mean age 8.36 +/- 1.36 years. The mean orthodontic traction duration was 11.28 
      +/- 3.08 months. Multiple regression analyses indicated that factors resulting in
      a longer duration were age (beta = 0.779; P = 0.043), crown height (beta = 0.344;
      P = 0.007), crown-root angle (beta = -0.037; P = 0.018), and tooth length (beta =
      -0.623; P = 0.038). CONCLUSIONS: Surgical-orthodontic correction of labial
      inversely impacted maxillary incisors requires an average of 1 year. Assessments 
      of age, crown height, root dilaceration, and length of incisor can help the
      orthodontist to better predict treatment duration during consultations with
      patients and parents.
CI  - Copyright (c) 2018 American Association of Orthodontists. Published by Elsevier
      Inc. All rights reserved.
FAU - Bhikoo, Chandradev
AU  - Bhikoo C
AD  - Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical
      University, Wenzhou, Zhejiang, China.
FAU - Xu, Jing
AU  - Xu J
AD  - Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical
      University, Wenzhou, Zhejiang, China.
FAU - Sun, Hao
AU  - Sun H
AD  - Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical
      University, Wenzhou, Zhejiang, China.
FAU - Jin, Chenrui
AU  - Jin C
AD  - Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical
      University, Wenzhou, Zhejiang, China.
FAU - Jiang, Huixi
AU  - Jiang H
AD  - Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical
      University, Wenzhou, Zhejiang, China.
FAU - Hu, Rongdang
AU  - Hu R
AD  - Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical
      University, Wenzhou, Zhejiang, 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  - Child
MH  - Child, Preschool
MH  - Combined Modality Therapy
MH  - Female
MH  - Humans
MH  - Incisor/*abnormalities
MH  - Lip
MH  - Male
MH  - Maxilla
MH  - Oral Surgical Procedures
MH  - Orthodontic Appliances
MH  - Orthodontics, Corrective
MH  - Retrospective Studies
MH  - Time Factors
MH  - Tooth, Impacted/*therapy
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- 2017/09/01 00:00 [revised]
PHST- 2017/09/01 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)30095-7 [pii]
AID - 10.1016/j.ajodo.2017.09.017 [doi]
PST - ppublish
SO  - Am J Orthod Dentofacial Orthop. 2018 May;153(5):708-715. doi:
      10.1016/j.ajodo.2017.09.017.