Evaluation Of Effect Of Atmospheric Pressure On Retention Of Maxillary Complete Dentures In Edentulous Individuals

Atmospheric pressure is one of the important physical factors in retention of complete denture. Retention derived from adhesion and cohesion can resist only dislodging forces acting perpendicular to the denture and fail to resist dislodgement of denture by horizontal forces and lateral torques. These dislodgements can be resisted by the retention of the denture provided by the partial vacuum created by the denture border seal. Such a seal will prevent the entrance of air under the denture during the process of speech, deglutition, singing or mastication of food and such a seal will create a partial vacuum that will not operate continuously but one that will come into play only when tipping thrusts tend to dislodge the denture.