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KMID : 0361919950250010101
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Korean Journal of Orthodontics
1995 Volume.25 No. 1 p.101 ~ p.110
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THE INITIAL TISSUE CHANGE TO THE IMMEDIATE ORTHODONTIC FORCE FOLLOWING BUCCAL HORZONTAL SUBAPICAL OSTEOTOMY OF MAXILLA
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Abstract
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This study was investigated to assess the difference of facial height and occiusal plane inclination between preand post-treatnnent in Class I malocclusion group.
The subjects consisted of 35 extraction patients and 30 nonextraction patients, and was subdivided into Group I(overbite4mm) in reference to overbite, and adolescent
group and adult group in reference to age.
Lateral cephalograrn was taken with standard method, traced, and digitized for each subject The computerized statistical analysis was carried out with SAS Prngr8nl
The results were ass follows
1. In both groups of extraction and nonexiraction group the anterior facial height increased after orthodontic
treatment, but there was no significant differenoe(p>0) between each goup.
2. There was no statistical significance in change of occiusal plane inclination in adolescent group, but significant
difference(p<0.05) among three subgroup in adult group.
3. In adolescent-extraction and adolescent-nonext action group there was significant increase of anterior facial height and posterior facial height, and was superior to adult groups in posterior facial height increment
4 In all groups upper and lower molars were uprighted to occlusal plane. This had statistically significant effect
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