J. Orthod.
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British Journal of Orthodontics, Vol 16, 85-93, Copyright © 1989 by British Orthodontic Society

REVIEW ARTICLES

An assessment of the fit of a parabolic curve to pre- and post- treatment dental arches

ML Jones and S Richmond
Department of Child Dental Health, Dental School, Heath Park, Cardiff.

Study casts of the teeth are routinely used for diagnosis and to assess treatment change: the crowding of the teeth or shortage of space available within the dental arch is usually assessed visually. A full cast analysis program has been developed previously, making use of the three-dimensional Reflex Plotter linked to a computer. This study examines the validity of the fit of computer generated parabolic curves to dental arches, as performed in the measurement of crowding. Using a visual analogue method it was found that the parabola appeared to fit lower post-treatment dental arches best. However, reservations regarding the fit of symmetrical curves are expressed and other solutions suggested.


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H. Wellens
A clinical experimental simulation of changes in intercanine width associated with the correction of crowding: a pilot study
Eur J Orthod, December 1, 2007; 29(6): 632 - 638.
[Abstract] [Full Text] [PDF]


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Copyright © 1989 British Orthodontic Society.