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J Dent Educ. 47(12): 771-773 1983
© 1983 American Dental Education Association
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Journal of Dental Education, Vol 47, Issue 12, 771-773
Copyright © 1983 by American Dental Education Association

Articles

A comparison of rectangular and cylindrical collimation for intraoral radiographs

PS Horton, FH Sippy, JF Nelson, FJ Kohout, and GC Kienzle

This study was conducted to compare the type and frequency of cone-cuts that occur with rectangular and cylindrical collimation in dental radiography. Thirty-eight hundred radiographs, half made with cylindrical cones and half made with rectangular cones, were examined for major and minor cone-cuts. A total of 156 cone-cuts was found. Thirty-three of these were of the major category, 86 percent of which occurred with rectangular collimation. Although cone-cuts appeared much more frequently when a rectangular cone was used, a significant reduction in useless radiation makes this type of collimation a worthwhile consideration.


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 Dentomaxillofac RadiolHome page
A. Chau, T. Li, and J Wong
A randomized double blinded study to assess the efficacy of a laser-guided collimator on dental radiography training.
Dentomaxillofac. Radiol., May 1, 2006; 35(3): 200 - 204.
[Abstract] [Full Text] [PDF]


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