Flashcards in Complete Dentures Lab 3 Deck (19)
What should be done to the master cast prior to the fabrication of the record bases?
posterior palatal seal should be trimmed into master cast
Why do we trim the posterior palatal seal into the cast?
softer tissues of the posterior palate are able to tolerate additional pressure of denture acrylic as well as compensate for acrylic distortion during the processing of the denture.
Where do you put the seal to prepare the posterior palatal seal?
cut as a bead in the cast just distal to the vibrating line w/ a #8 bur at slow speed
what should the depth of the bead be at the hamular notch? at the center of the glandular tissue? at the midline?
1mm; 1.5mm; 0.5 mm
What should the width of the bead be from hamular notch to hamular notch?
The bead in the glandular tissue should extend into the palate ____mm in width.
The glandular extension of the seal should gradually get _____.
- depth of 1.5mm at the vibrating line to 0mm in the palate
Unlike the custom tray, the record base borders should...?
extend into the depth of the vestibule
Cut a window into the anterior ridge of the MD record base that extends from _____ to _____ prior to curing.
canine eminence to canine eminence
Leave at least ____ of material in the vestibule for tray support before you cure.
A _____ may avoid volumetric shrinkage in the palate of the triad record base.
two stage cure
Allow wax to escape to the tissue side of the mandibular record base. T/F?
FALSE. DO NOT allow wax to escape to the tissue side of the mandibular record base.
What are the MX dimensions of the wax rims?
What are the MD dimensions of the wax rims?
What is the labial inclination of the wax rims?
- Maxillary - 10 degrees
- Mandibular - 0 degrees or perpendicular to the base
Keep the center of the wax rim over the _____ and the labial/buccal aspect within the _____.
center of the ridge; land area
Index cast 3 and 4 by placing _____ into the base of the cast with an E-cutter in a slow speed.
2 index lines
To mount the mandibular cast to the maxilla, open the articulator by setting the pin _____.
5 mm above the Zero line