KMID : 1149920120010010019
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Korean Journal of Limgual Orthodontics 2012 Volume.1 No. 1 p.19 ~ p.23
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An Evaluation of Slot Size in Lingual Orthodontic Brackets
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Lim Seung-Min
Hong Ryoon-Ki
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Abstract
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Purpose: To investigate precise slot size and shape of 5 commercially available lingual brackets in the 0.018-inch dimension.
Methods: 5 upper central incisor lingual brackets of 5 diff erent bracket systems were randomly selected and measured size and shape of horizontal slot. All of the brackets were 0.018-inch metal brackets and one of them was self ligating bracket. Bracket size and shape were measured to 1mm tolerance by 1 operator.
Results: Actual Ormco 7th generation slot showed 17% bigger than the manufacture¡¯s stated bracket slot dimension, and bracket slot dimensions of Stealth, Fujita, In-Ovation L, and STb were 7.6%, 6.0%, 5.2% and 2.5% bigger than stated dimension, respectively. Ormco 7th generation and STb have divergent bracket slot shape, and In-Ovation L has slightly divergent bracket slot shape. Stealth has parallel bracket slot wall. However, Fujita bracket has slightly convergent slot shape.
Conclusion: In lingual orthodontics, indirect bonding system is common using setup model which is fabricated by clinician¡¯s preference. In this case, it would be helpful to consider actual bracket slot size and shape before set up model is fabricated in order to avoid unexpected change of anterior teeth inclination.
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KEYWORD
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Slot size, Lingual bracket, Anterior torque
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