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Permanent link (DOI): https://doi.org/10.7939/R3FJ29S25

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Orthodontic bracket manufacturing tolerances and dimensional differences between select self-ligating brackets Open Access

Descriptions

Author or creator
Major, Thomas W.
Carey, Jason P.
Nobes, David S.
Major, Paul W.
Additional contributors
Subject/Keyword
Manufacturing tolerances
Orthodontic brackets
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
In all manufacturing processes there are tolerances; however, orthodontic bracket manufacturers seldom state the slot dimensional tolerances. This experiment develops a novel method of analyzing slot profile dimensions using photographs of the slot. Five points are selected along each wall, and lines are fitted to define a trapezoidal slot shape. This investigation measures slot height at the slot's top and bottom, angles between walls, slot taper, and the linearity of each wall. Slot dimensions for 30 upper right central incisor self-ligating stainless steel brackets from three manufacturers were evaluated. Speed brackets have a slot height 2% smaller than the nominal 0.559 mm size and have a slightly convergent taper. In-Ovation brackets have a divergent taper at an average angle of 1.47 degrees. In-Ovation is closest to the nominal value of slot height at the slot base and has the smallest manufacturing tolerances. Damon Q brackets are the most rectangular in shape, with nearly 90-degree corners between the slot bottom and walls. Damon slot height is on average 3% oversized.
Date created
2010
DOI
doi:10.7939/R3FJ29S25
License information
Attribution-NonCommerical-NoDerivs 3.0 Unported
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Citation for previous publication
Major, T., Carey, J., Nobes, D., and Major, P. (2010). Orthodontic bracket manufacturing tolerances and dimensional differences between select self-ligating brackets. Journal of Dental Biomechanics, 1(1), 781321.
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File author: Thomas W. Major {et al.}
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