Journal of Korean Dental Science

Korean Academy of Dental Science (대한치의학회)
권호 표지

Anterior and Posterior Overjet for Clinical Arch Coordination using 3-dimensional Analysis

  • Lee, Young-Wuk (Private practitioner) ;
  • Bayome, Mohamed (Department of Orthodontics, Medical School, The Catholic University of Korea) ;
  • Baek, Seung-Hak (Department of Orthodontics, School of Dentistry, Seoul National University) ;
  • Kook, Yoon-Ah (Department of Orthodontics, Seoul St. Mary's Hospital, The Catholic University of Korea)
  • Received : 2009.08.05
  • Accepted : 2009.09.28
  • Published : 2009.12.30
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Abstract

Introduction : The purposes of this study were to analyze the differences between the anterior and posterior overjets using bracket slot points, and compare two methods of overjet calculation according to different reference points using clinical bracket points on three-dimensional digital models. Methods : A total of 35 normal occlusion models were scanned using a three-dimensional scanner (Orapix$^{(R)}$, Orapix Co., Ltd, Seoul, Korea) and then, virtual brackets (0.022" Slot MBT preadjusted brackets, 3 M Co.CA. USA) were placed on the digital models using virtual setup program (3Txer$^{(R)}$ ver. 1.9.6, Orapix co., Ltd). Archwire-like curves were designed to analyze labial and buccal overjet. Results : There were no statistically significance differences between the right and left overjet and between genders. The average overjet was found to be $1.67{\pm}0.85mm$ at the central incisor area, $2.16{\pm}0.88mm$ at the second premolar and $1.53{\pm}0.71mm$ at the first molar. Conclusion : It is recommended that overjet of individualized upper and lower arch to be 2.0mm at the anterior and posterior teeth.

Keywords

References

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