THE INTRA-ANTRAL AIR PRESSURE INCIDENT TO THE RESPIRATORY EXCURSION AND ITS EFFECT ON ANTRAL DRAINAGE

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Abstract
The purpose of this study was to determine the intra-antral air pressure incident to the respiratory excursion and its effect on antral drainage.So far as I have been able to ascertain, the literature contains only a few references to the subject. In no instance has it been considered of any great importance as a drainage mechanism.Hajek stated that in one case the pus from the maxillary antrum flowed forward and discharged through the most anterior part of the hiatus. "In this case, we may assume that the narrow and deep infundibulum has an effect similar to that of a suction tube upon the pus discharging from the maxillary antrum." Yankauer, after reviewing the various theories of normal sinus drainage, concluded that, in addition to the action of the ciliated epithelium and posture, an "explanation of the manner in which these cavities are drained must be sought in the

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