Border seal

The physical contact established by the alveolar mucosa to drape the molded borders of an oral removable prosthesis in an attempt to create negative pressure that aids in the retention of the prosthesis and the prevention of the ingress of fluids, air, and food into the intaglio surface.


The edge of a denture that contacts the tissues in order to close the area under the denture to entrance by food, air, or liquids.


 


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