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The European Journal of Orthodontics 1999 21(1):41-48; doi:10.1093/ejo/21.1.41
© 1999 by European Orthodontic Society
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Ectopic eruption of the maxillary canine quantified in three dimensions on cephalometric radiographs between the ages of 5 and 15 years

P McSherry and A Richardson

Division of Orthodontics, The Queen's University of Belfast, Belfast, UK

The eruption paths of 20 ectopic maxillary canine teeth (10 right, 10 left) were measured in three dimensions on annual lateral and depressed postero-anterio cephalometric radiographs of 15 patients between the ages of 5 and 15 years compared with the eruption of normal canines.

It was found that between the ages of 8 and 12 years ectopic canines on the left side moved more anteriorly than the normally erupting canines and the same was true of the right canines between the ages of 7 and 12 years. While the ectopic canines moved occlusally, their vertical movement was less than normal which accounts for the clinical finding that canines are impacted in the palate at a high level. The average palatally ectopic canine always moves palatally, and never shares in the buccal movement shown by normally erupting canines between the ages of 10 and 12 years. It was interesting to find that the differences between growth of normal and ectopic canines in the lateral plane of space are present as early as 5-6 years.


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S. Camilleri, C.M. Lewis, and F. McDonald
Ectopic Maxillary Canines: Segregation Analysis and a Twin Study
Journal of Dental Research, June 1, 2008; 87(6): 580 - 583.
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K. Al-Nimri and T. Gharaibeh
Space conditions and dental and occlusal features in patients with palatally impacted maxillary canines: an aetiological study
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[Abstract] [Full Text] [PDF]


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