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Long-term stability of anterior open-bite treatment by intrusion of maxillary posterior teeth

Authors
 Man-Suk Baek  ;  Yoon-Jeong Choi  ;  Hyung-Seog Yu  ;  Kee-Joon Lee  ;  Jinny Kwak  ;  Young-Chel Park 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.138(4) : 396-8, 2010 
Journal Title
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS
ISSN
 0889-5406 
Issue Date
2010
MeSH
Adolescent ; Adult ; Bone Screws ; Cephalometry ; Female ; Follow-Up Studies ; Humans ; Male ; Maxilla ; Molar ; Open Bite/therapy* ; Orthodontic Anchorage Procedures/instrumentation* ; Orthodontic Retainers* ; Secondary Prevention ; Statistics, Nonparametric ; Tooth Movement Techniques* ; Young Adult
Abstract
INTRODUCTION: Anterior open bite results from the combined influences of skeletal, dental, functional, and habitual factors. The long-term stability of anterior open bite corrected with absolute anchorage has not been thoroughly investigated. The purpose of this study was to examine the long-term stability of anterior open-bite correction with intrusion of the maxillary posterior teeth.

METHODS: Nine adults with anterior open bite were treated by intrusion of the maxillary posterior teeth. Lateral cephalographs were taken immediately before and after treatment, 1 year posttreatment, and 3 years posttreatment to evaluate the postintrusion stability of the maxillary posterior teeth.

RESULTS: On average, the maxillary first molars were intruded by 2.39 mm (P<0.01) during treatment and erupted by 0.45 mm (P<0.05) at the 3-year follow-up, for a relapse rate of 22.88%. Eighty percent of the total relapse of the intruded maxillary first molars occurred during the first year of retention. Incisal overbite increased by a mean of 5.56 mm (P<0.001) during treatment and decreased by a mean of 1.20 mm (P<0.05) by the end of the 3-year follow-up period, for a relapse rate of 17.00%. Incisal overbite significantly relapsed during the first year of retention (P<0.05) but did not exhibit significant recurrence between the 1-year and 3-year follow-ups.

CONCLUSIONS: Most relapse occurred during the first year of retention. Thus, it is reasonable to conclude that the application of an appropriate retention method during this period clearly enhances the long-term stability of the treatment.
Full Text
http://www.sciencedirect.com/science/article/pii/S0889540610004890
DOI
10.1016/j.ajodo.2010.04.023
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Park, Young Chel(박영철)
Yu, Hyung Seog(유형석) ORCID logo https://orcid.org/0000-0002-1275-5078
Lee, Kee Joon(이기준) ORCID logo https://orcid.org/0000-0002-0782-3128
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/102373
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