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A specially marked (in mm) stainless steel rod (2 mm diameter), was used to measure the site of the opening from the anterior nasal spine (this is the fixed bony point nearest to the opening, taken as the reference point).
Infiltration of nasal structures may lead to sensation of nasal stuffiness, epistaxis, saddle deformity due to septal perforation and destruction of the anterior nasal spine.
A unilateral (rather than bilateral) mucosal flap is elevated to the nasal floor by incising the decussating fibers that attach it to the anterior nasal spine and the maxillary crest.

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