Posterior palatal seal
By Dr.Swathi Pai
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Saturday, January 17, 2009
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“Ah” line: this is the vibrating line and saying “ah” will cause the soft palate to lift
The vibrating line is not a line, but more of an area.
Blow-line (valsalva line): this is a line usually forward of the vibrating line which freely moves when the patient attempts to blow are through the nose when it is squeezed tightly.
The blow-line a close approximation to the junction of the hard and soft palate.
Cohesion, adhesion and interfacial surface tension have limited value unless an intact peripheral seal is present.
Category: Prosthodontics Notes
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