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Quantitative evaluation and affecting factors of post-treatment relapse tendency

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Authors
Son, Woo-Sung; Cha, Kyung-Suk; Chung, Dong-Hwa; Kim, Tae-Woo
Issue Date
2011-06
Publisher
KOREAN ASSOC ORTHODONTISTS
Citation
KOREAN JOURNAL OF ORTHODONTICS, Vol.41, No.3, pp.154-163
Keywords
RelapsePAR indexOcclusal indexABO-OGS
Abstract
Objective: The purpose of this study was to quantitatively evaluate relapse tendency after orthodontic treatment and determine the contributing factors by using the American Board of Orthodontics objective grading system (ABO-OGS). Methods: The subjects were 80 patients with more than 2 years of retention period after completing orthodontic treatment at the dental hospitals of Busan University, Kyunghee University, and Dankook University. The posttreatment (T2) and post-retention (T3) ABO-OGS measurements were analyzed in relation to age, gender, Angle`s classification, extraction, retention period, and pretreatment condition (initial peer assessment rating (PAR) index, T1) by multiple regression analysis. Results: Among the 7 ABO-OGS criteria, alignment worsened but occlusal contact and interproximal contact improved in T3, but not in T2 (p < 0.01). The 4 other criteria showed no significant differences. Multiple regression analysis showed that alignment, occlusal relationship, overjet, and interproximal contact were significant linear models, but with a low explanation power. Age, gender, Angle`s classification, extraction, retention period, and pretreatment condition (initial PAR index, T1) had little influence on the ABO-OGS changes between T3 and T2. Conclusions: An orthodontist`s understanding of posttreatment relapse tendency can be useful in diagnosis and during patient consultation. (Korean J Orthod 2011; 41(3):154-163)
ISSN
1225-5610
Language
Korean
URI
https://hdl.handle.net/10371/80338
DOI
https://doi.org/10.4041/kjod.2011.41.3.154
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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