Prosthodontics Lecture 15

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What is the purpose of the posterior palatal seal in a maxillary denture?

To provide retention in the anterior area of the maxillary arch

To reduce the tendency for gag reflex and provide a good seal in the posterior area (correct)

To compensate for the shrinkage of the acrylic resin during processing

To determine the anterior border of the maxillary denture

How is the seal carved into the cast?

With a small dull scraper

With a small sharp scraper

With a large sharp scraper (correct)

With a large dull scraper

What is the recommended depth of the seal in the middle of the PPS?

1.5 mm

0.5 mm (correct)

1 mm

2 mm

What is the result of under post damming during the final impression?

Insufficient placement of the PPS area along the posterior border of the denture base Signup and view all the answers

What is the purpose of the posterior palatal seal area in a maxillary denture?

To apply pressure within the physiologic limit to assist in the retention of the denture Signup and view all the answers

What is the purpose of drawing a second line to form a butterfly pattern?

To place points in the glandular area of the hard palate Signup and view all the answers

What is the recommended thickness of the palatal surface of a maxillary denture?

2.5 mm Signup and view all the answers

What is the technique called when reproducing the natural crinkles and pits on the gingival contour of a denture?

Stippling Signup and view all the answers

What is the recommended width of the seal in the glandular area between the hamular notch and the middle of the posterior palate?

3-4 mm Signup and view all the answers

How should the slop of the lingual flange of a mandibular denture be designed?

Free from undercuts and very slightly concave at the lower border Signup and view all the answers

What is the purpose of smoothing and polishing the denture base after contouring?

To remove any imperfections and create a smooth surface Signup and view all the answers

What is the term for the raised area in the interdental space of a denture?

Papilla Signup and view all the answers

What is the purpose of drawing a line from the right to the left hamular notches on the cast?

To determine the posterior palatal seal Signup and view all the answers

What is the vibrating line of the soft palate used as a guide for?

Determining the ideal posterior border of the denture Signup and view all the answers

What is the purpose of instructing the patient to say 'AH' with vigorous bursts?

To determine the anterior border of the vibrating line Signup and view all the answers

What is the conventional method of determining the posterior palatal seal area?

By drawing a line on the cast from one tuberosity to the other Signup and view all the answers

What is the result of connecting the points in the fovea palatina area and the hamular notch areas on the master cast?

A solid line representing the posterior palatal seal Signup and view all the answers

What is the significance of the posterior nasal spine in relation to the vibrating line?

It projects anteriorly, making the vibrating line a curved line Signup and view all the answers