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http://dx.doi.org/10.4041/kjod.2015.45.5.226

Short-term and long-term treatment outcomes with Class III activator  

Ryu, Hyo-kyung (Department of Orthodontics, College of Dentistry, Wonkwang Dental Research Institute, Wonkwang University)
Chong, Hyun-Jeong (Private Practice)
An, Ki-Yong (Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University)
Kang, Kyung-hwa (Department of Orthodontics, College of Dentistry, Wonkwang Dental Research Institute, Wonkwang University)
Publication Information
The korean journal of orthodontics / v.45, no.5, 2015 , pp. 226-235 More about this Journal
Abstract
Objective: The purpose of this retrospective study was to investigate short-term and long-term skeletodental outcomes of Class III activator treatment. Methods: A Class III activator treatment group (AG) comprised of 22 patients (9 boys, 13 girls) was compared with a Class III control group (CG) comprised of 17 patients (6 boys, 11 girls). The total treatment period was divided into three stages; the initial stage (T1), the post-activator treatment or post-mandibular growth peak stage (T2), and the long-term follow-up stage (T3). Cephalometric changes were evaluated statistically via the Mann-Whitney U-test and the Friedman test. Results: The AG exhibited significant increases in the SNA angle, ANB angle, Wits appraisal, A point-N perpendicular, Convexity of A point, and proclination of the maxillary incisors, from T1 to T2. In the long-term follow-up (T1-T3), the AG exhibited significantly greater increases in the ANB angle, Wits appraisal, and Convexity of A point than the CG. Conclusions: Favorable skeletal outcomes induced during the Class III activator treatment period were generally maintained until the long-term follow-up period of the post-mandibular growth peak stage.
Keywords
Class III activator; Skeletodental changes;
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