Removable Partial Dentures

Question 0

How wide must a palatal strap be?

Answer 0

8mm

Question 1

How wide must an AP Palatal strap be?

Answer 1

6-8 mm

Question 2

How far must the border of bar and strap type connectors be from the gingival margin?

Answer 2

At least 6 mm

Question 3

What is a main difference between a closed horseshoe and an AP strap?

Answer 3

Closed horseshoe has lingual plating

Question 4

Name three requirements for the design of a lingual bar connector:

Answer 4

1. Must be at least. 4 mm from gingival margins
2. Must be 5mm in width
3. Must not impinge the floor of the mouth

Question 5

What is the minimum thickness for a rest?

Answer 5

1mm

Question 6

What area is the retentive tip of a circumferential clasp?

Answer 6

The terminal third

Question 7

What four functions do clasps perform?

Answer 7

Retention, reciprocation, bracing and encirclement.

Question 8

What four factors influence the flexibility of a clasp?

Answer 8

1. Length of the arm
2. Cross sectional size
3. Cross sectional shape
4. Type of alloy used

Question 9

What is the correct burnout temperature?

Answer 9

1350* F

Question 10

True or false: The fusion temperature of alloys is the same as the lower limit of it’s melting range.

Answer 10

False: The fusion temperature is slightly higher than the lower limit of it’s melting range and should not be exceeded when soldering.

Question 11

What is the melting range of RPD alloys?

Answer 11

2300-2500*F

Question 12

What is the percentage contraction of solidifying RPD metals?

Answer 12

1.7%

Question 13

How many combinations of missing teeth are possible?

Answer 13

Over 50,000

Question 14

What is the contraction of solidifying metal?

Answer 14

1.7%