Complete Dentures Lab 3 Flashcards

1
Q

What should be done to the master cast prior to the fabrication of the record bases?

A

posterior palatal seal should be trimmed into master cast

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2
Q

Why do we trim the posterior palatal seal into the cast?

A

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.

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3
Q

Where do you put the seal to prepare the posterior palatal seal?

A

cut as a bead in the cast just distal to the vibrating line w/ a #8 bur at slow speed

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4
Q

what should the depth of the bead be at the hamular notch? at the center of the glandular tissue? at the midline?

A

1mm; 1.5mm; 0.5 mm

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5
Q

What should the width of the bead be from hamular notch to hamular notch?

A

2mm

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6
Q

The bead in the glandular tissue should extend into the palate ____mm in width.

A

4-5mm

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7
Q

The glandular extension of the seal should gradually get _____.

A

shallower

  • depth of 1.5mm at the vibrating line to 0mm in the palate
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8
Q

Unlike the custom tray, the record base borders should…?

A

extend into the depth of the vestibule

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9
Q

Cut a window into the anterior ridge of the MD record base that extends from _____ to _____ prior to curing.

A

canine eminence to canine eminence

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10
Q

Leave at least ____ of material in the vestibule for tray support before you cure.

A

2mm

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11
Q

A _____ may avoid volumetric shrinkage in the palate of the triad record base.

A

two stage cure

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12
Q

Allow wax to escape to the tissue side of the mandibular record base. T/F?

A

FALSE. DO NOT allow wax to escape to the tissue side of the mandibular record base.

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13
Q

What are the MX dimensions of the wax rims?

A
Maxillary Dimensions:
- Width 
Anterior 5mm 
Posterior 10mm 
- Height 
Anterior 22mm 
Posterior 20mm
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14
Q

What are the MD dimensions of the wax rims?

A
Mandibular Dimensions:
- Width 
Anterior 5mm 
Posterior 10mm 
- Height 
Anterior 18mm 
Posterior 18mm
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15
Q

What is the labial inclination of the wax rims?

A

Labial Inclination:

  • Maxillary - 10 degrees
  • Mandibular - 0 degrees or perpendicular to the base
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16
Q

Keep the center of the wax rim over the _____ and the labial/buccal aspect within the _____.

A

center of the ridge; land area

17
Q

Index cast 3 and 4 by placing _____ into the base of the cast with an E-cutter in a slow speed.

A

2 index lines

18
Q

To mount the mandibular cast to the maxilla, open the articulator by setting the pin _____.

A

5 mm above the Zero line

19
Q

Opening the articulator results in _____ space between the upper and lower unit.

A

INCREASED