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KMID : 1036420090020020018
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대한치의학회 영문학회지
2009 Volume.2 No. 2 p.18 ~ p.23
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Anterior and Posterior Overjet for Clinical Arch Coordination using 3-dimensional Analysis
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Lee Young-Wuk
Bayome Mohamed
Baek Seung-Hak
Kook Yoon-Ah
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Abstract
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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, 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 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 ± 0.85mm at the central incisor area, 2.16 ± 0.88mm at the second premolar and 1.53 ± 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.
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KEYWORD
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Overjet, Arch form dimensions, Normal occlusion, 3-dimensional analysis
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