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2) Weakly, conversely and statistically significantly correlated to the distance from the apical region of dental alveoli to the superior margin of the IAN canal (measured on OPG images) at both LM1 (r=-.227) and LM2 (r=-.271) sites (Tables I and II, respectively).
This also means that if the value of the alveolar process height at the LM1 site was less than percentile 16.2 which is equivalent to 21.5 mm, or if the value of this height at LM2 was less than percentile 20 which is equivalent to 19.7 mm, there is a high probability of encountering a deep LU in the respective region; 3) 5.2 % ([r.sup.2]=0.052) and 7.3 % ([r.sup.2]=0.073) of variation in LU angulation is explained by variation in the distance from the apical region of dental alveoli to the superior margin of the IAN canal at LM1 and LM2 site, respectively.
Although these correlations are moderate, they are statistically significant, and have been shown in this study to be more strongly correlated with LU angulation than the width of the alveolar process and the distance from the apical region of dental alveoli to the superior margin of the IAN canal at both LM1 and LM2 sites.
The distance from the apical region of dental alveoli to the superior margin of the IAN canal measured on the OPG is less than 0.4 mm and 0.1 mm at the LM1 and LM2 sites, respectively.
Actinomyces bovis is a symbiotic inhabitant of oral mucosa that gains access through the abrading and penetrating injury to the buccal mucosa and dental alveoli. Involvement of adjacent bone frequently results in facial distortion, loose teeth and dyspnea due to swelling in the nasal cavity (Thomas, 1998).