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The upper canines are separated from the nasal cavity
by a very thin bone plate on their medial or palatal aspect. Robust
use of luxators will cause the apex of the tooth to be forced into
the nasal cavity and create an Oral Nasal Fistula (ONF).
Lower canines cross the floor of the oral cavity, from buccal to
medial, with the apex located at the caudal mandibular symphysis.
The root is, therefore, not accessible for much of its length. Over-robust
elevation of the lower canines may well cause symphyseal or horizontal
ramus fracture of the mandible.
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