Korean J Orthod.
1990 Nov;20(3):603-614.
A comparative study of mandibular tooth development between Angle Class I malocclusion group and Angle Class III malocclusion group
- Affiliations
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- 1Department of Orthodontics, College of Dentistry, Pusan National University, Korea.
Abstract
- The purpose of this study was to compare mandibular teeth development of Angle Class I malocclusion group with that of Angle Class III malocclusion group. The studied subjects consisted of 217 Angle Class I malocclusion patients and 235 Angle Class III malocclusion patients. Two study methods were used. One was to evaluate tooth development degree by means of Nolla stage method, the others was to measure tooth length on panoramic radiograph. The following results were obtained, in 7, 8 and 9 years, tooth development of Angle Class III malocclusion group was significantly faster than that of Angle Class I malocclusion group. in 6 year and 10, 11, 12, 13, 14 years, the difference of tooth development degree between Angle Class III malocclusion group was not significant.
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