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Displacement pattern of the maxillary arch depending on miniscrew position in sliding mechanics.

Authors
 Kee-Joon Lee  ;  Young-Chel Park  ;  Chung-Ju Hwang  ;  Young-Jae Kim  ;  Tae-Hyun Choi  ;  Hyun-Mi Yoo  ;  Seung-Hyun Kyung 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.140(2) : 224-232, 2011 
Journal Title
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
ISSN
 0889-5406 
Issue Date
2011
MeSH
Adolescent ; Adult ; Alveolar Process/surgery ; Bone Screws ; Cephalometry/statistics & numerical data ; Dental Stress Analysis* ; Female ; Humans ; Incisor/physiopathology* ; Malocclusion/therapy* ; Orthodontic Anchorage Procedures/instrumentation* ; Statistics, Nonparametric ; Tooth Extraction ; Tooth Movement Techniques/instrumentation ; Tooth Movement Techniques/methods* ; Young Adult
Abstract
INTRODUCTION: This clinical study was performed to evaluate the anteroposterior and vertical displacement patterns of the maxillary teeth in sliding mechanics depending on the position of interradicular miniscrews after the extraction of premolars.

METHODS: Thirty-six women requiring maximum incisor retraction because of bialveolar protrusion were divided into 2 groups: group A (n = 18), miniscrew between the premolar and the molar, and group B (n = 18), miniscrew between the premolars. Cephalometric measurements for skeletal and dental changes were made before and after space closure.

RESULTS: In both groups, significant incisor retraction with intrusion of the root apex was noted, with no significant change in the first molar position. Group B displayed significantly greater intrusion at both the incisal tip (1.59 ± 1.53 mm) and the root apex (2.89 ± 1.59 mm) than did group A. In spite of the mean reduction of the vertical skeletal measurements, we failed to find significant skeletal changes.

CONCLUSIONS: Miniscrews provided firm anchorage for anterior retraction. Selection of the placement site appeared to be an important determinant for the resultant displacement pattern of the incisor segment. Discriminative intrusion or retraction might be obtained via strategic miniscrew positioning.
Full Text
http://www.sciencedirect.com/science/article/pii/S0889540611004537
DOI
10.1016/j.ajodo.2010.05.020
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Young Jae(김영재)
Park, Young Chel(박영철)
Lee, Kee Joon(이기준) ORCID logo https://orcid.org/0000-0002-0782-3128
Choi, Tae Hyun(최태현)
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/94237
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