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A RADIOGRAPHIC STUDY ON THE EXPERIMENTAL LESIONS OF THE MAXILLARY SINUS

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Abstract

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#ÃÊ·Ï#
This study was performed to determine the each location of lesions in the maxillary
sinus and to evaluate the relationship between the floor of the antrum and the apical
regions of teeth by the comparison of the panoramic view and panoramic sinus view.
For this study, experimentally with two dry skulls, jelly balls of 8mm and 15mm in
diameter containing a short wire for the radiopacity similar to the cyst and clinically 5
patients having mucosal cyst in the antrum and 10 patients having periapical lesion of
molar were used.
The experimental cystic lesions were simulated with jelly ball being attached in turn
to each wall of the antrum. The radiolucent periapical lesions of upper molars were
formed by using round bur and the radiopaque periapical lesions were simulated by
filling the former lesions with lead foil.
Each panoramic view and each panoramic sinus view of the experimental lesions and
patients were obtained by using panoramic machine and analyzed.
The obtained results were as follows :
1. On the panoramic sinus view, the innominate line was approximately coincided with
the most lateral portion of the antrum and the posterior wall appeared as the narrow
area at the mesial side of the innominate line. The anterior wall occupied totally the
mesial side of the innominate line, and the medial wall occupied the mesial half of the
antrum.
2. In all cases of experimental cystic lesion attached to each wall of the antrum, the
location of each lesion was able to be determined by applying Tube shift technic.
3. The palatal Foot and mesiobuccal root of the molar appeared as being transposed
each other mesiolaterally on the panoramic and panoramic sinus views.
4. The panoramic sinus view was superior to the panoramic view in resealing the
relationship between the floor of the antrum and the periapical lesion.

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