postpalatal seal area
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pos·te·ri·or pal·a·tal seal ar·e·a
the soft tissues along the junction of the hard and soft palates on which pressure within the physiologic limits of the tissues can be applied by a denture to aid in the retention of the denture.
post·pal·a·tal seal a·re·a(pōst-pală-tăl sēl arē-ă)
Soft tissue area in the region of the soft palate on which physiologic pressure from a removable complete prosthesis will aid its retention.