Prosthodontics

Question 1

Edentulous ridge classification? Explain each

Answer 1

Min/mod/substantially compromised edentulous area

Question 2

What’s the absolute max # of post teeth which can be replaced w/FPD

Answer 2

3 (excluding abutments)

Question 3

What’s Ante’s law?

Answer 3

Abutment teeth surface => Pontics

Question 4

What is crown/root ratio?

Answer 4

Length occlusal -alveolar crest
Length of root inside bone

Favorable - 1:2
Optimum - 2:3
Min - 1:1

Question 5

What happens when the thickness of pontics is reduced by half?

Answer 5

X8 deflection

Question 6

How much deflection would it be in a 2 span FPD ?

Answer 6

X8

D= (#pontics)3

Question 7

In case of extrusion of opposing tooth, what to do 1st?

Answer 7

Adjust/restore extruded tooth 1st and the plan for FPD

Question 8

Mainly used for a dx wax up?

Answer 8

Plan tooth contours
Occlusal contacts
Esthetics

Question 9

What will minor tooth movement to correct tild do?

Answer 9

> resistance
< pulpal involvement
Occlusal F along axis
embrasure

Question 10

Tx plan on tilted molar abutment

Answer 10

Mild (<25•) restore M 8’s +F/L grooves
Severe (25-30)
- ortho
- telescope crown
- proximal half crown as retainer
- non-rigid connector

Question 11

Mand major connectors?

Answer 11

Lingual bar

Lingual plate

Question 12

Named the major connector and give indications

Answer 12

Lingual bar
- most common
- need min 8mm
- contraindicated in ant teeth w/perio
- 1/2 pear shape (2mm)

Question 13

Named the major connector, give indications and contraindications

Answer 13

Lingual plate
- used in perio involved
- insufficient vertical space
- inoperable lingual tori
- disav: > Caries, >foot retention

Question 14

What’s beading

Answer 14

Outline of max major connector in the master cast
- 0.5 mm deep
- > tissue contact < food impaction