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How do we achieve retention?
of polished (inaglio) surface to enhance neuromuscular control
of tissue surface to denture to maximize adhesion and cohesion effects
to maximize the effect of atmospheric pressure (suction) to oppose dislodgement
What is the purpose of the posterior palatal seal?
and maintain the peripheral seal of the maxillary denture base by compensating for
2) Minor denture base
What is the
Where is it relative to the denure base?
The junction between the
mobile and non-mobile
portions of the soft palate
You can see the tissues moving with the 'ah' sound
The maxillary denture base ends
just anterior (1mm)
to the vibrating line
What Constitues the House Classifications?
The greater the
of the soft palate the less favorable house classification
How do we transfer the vibrating line to the master cast?
We develop a 'bead seal' by modifying the cast with a small rounded instrument
What is a Svenson seal?
A modification of the bead seal where the whole region is carved out of the cast
Much harder to duplicate, compresses more tissue
What are the
two small dots near the junction of the soft palate
How deep do we want the bead seal to be near delicate tissues?
No more than .75mm near these areas
Dentures Lecture 6