Maxillary sinus pneumatization following extractions: a radiographic study.

Purpose: The aim of this study was to identify and measure postextraction maxillary sinus pneumatization using fixed reference lines on panoramic radiographs.

Materials And Methods: One hundred fifty-two panoramic radiographs, each of a different subject, were used to measure superoinferior differences of the sinus floor position in dentate sites in comparison with contralateral edentulous sites. Fifty-eight pairs of panoramic radiographs, each pair of the same subject, were used to measure superoinferior differences of the sinus floor position in the same site before and 6 to 67 months after extraction.

Correlation between maxillary sinus floor topography and related root position of posterior teeth using panoramic and cross-sectional computed tomography imaging.

Objective: This study correlated the topographic relationship of the maxillary sinus floor to the roots of posterior teeth imaged by panoramic radiography and cross-sectional computed tomography (CT).

Study Design: Paired panoramic radiographs and CT images of maxillae from 80 subjects were analyzed. A total of 422 maxillary roots were classified according to their topographic relationship to the maxillary sinus and measured according to their projection lengths on the sinus cavity for both imaging modalities.