Posterior palatal seal

By Dr.Swathi Pai on Saturday 17 January 2009 with 0 comments



“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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