Abstract
This article describes the changes in height, width and cross-sectional area of the alveolar process of the upper jaw after the closure of acute postextraction oroantral communications by mobilizing mucoperiosteal trapezoidal vestibular flap. Evaluation of these parameters was performed by measuring on computer tomograms taken on the day of surgery and after six months. It was established that horizontal alveolar ridge atrophy significantly exceeds changes in the vertical direction, and the most pronounced difference observed when comparing the cross-sectional area of the alveolar process in the perioperative and control periods. The obtained results exceed known from the literature parameters of the alveolar process atrophy after tooth extractions not accompanied by the maxillary sinus perforation.
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