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KMID : 0361920040340020153
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Korean Journal of Orthodontics
2004 Volume.34 No. 2 p.153 ~ p.163
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Correlationship of skeletodental factors to a relapse in class Ⅱ correctionn
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Abstract
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The purpose of this study was to evaluate the postretention change of class II malocclusion treatment and to examine which factors were related to the relapse. Seventy-eight treated cases were divided´ into two groups according to the stability of treatment results. Various measurements in pre-treatment and post-treatment lateral cephalograms were evaluated and comparisons were drawn between the stable and relapse group by t-test and correlation analysis.
1. There were only a few differences in the skeletodental relationship in the pre-treatment phase between the stable and the relapse group.
2. Mandibles in the stable group were repositioned more anteriorly than those in the relapse group.
3. Mandibular incisors were more uprighted to the basal bone and maxillary incisors were less lingualized in the stable
group than in the relapse group.
4. Occlusal plane was inclined forward and downward in the relapse group.
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