Final

Question 1

What are mechanical devices for mechanical retention?

Answer 1

box, groove, ferrule

Question 2

What are supplemental devices for mechanical retention?

Answer 2

pins, amalgapins, post

Question 3

A metal rod luted into a hole drilled in dentin to enhance retention is what type of pin?

Answer 3

cemented pin

Question 4

A pin screwed into a hole drilled in dentin to enhance retention is..

Answer 4

self-treading pin

Question 5

A metal rod driven into a hole drilled in dentin to enhance retention; retained solely by dentinal elasticity is a…..

Answer 5

friction retained pin

Question 6

How should pins be placed?

Answer 6

2mm into the tooth and 2mm into the amalgam

Question 7

What is a post?

Answer 7

Usually a metal material that is fitted into a prepared root canal of a natural tooth. When combined with an artificial crown or core, it provides retention and resistance for the restorations.

Question 8

What is the purpose of post?

Answer 8

Retain a core in a tooth with extensive loss of coronal tooth structure.

Question 9

Post width should not be greater than….

Post length should be…

Answer 9

1/3 of the root width; 2/3 length of the root.

Question 10

How much gutta percha should remain apically to the post?

Answer 10

4-5mm

Question 11

For maxillary teeth the post should extent into what root?

Answer 11

Lingual root

Question 12

For mandibular teeth the post should extend into what root?

Answer 12

Distal root

Question 13

What is the ideal and minimum crown to root ratio?

Answer 13

Ideal = 2:3, Minimum = 1:1

Question 14

The combined root surface area of all abutment teeth supporting a fixed partial denture should be equal to or greater in root surface area than the tooth of teeth to be replaced. What law is this?

Answer 14

Ante’s Law

Question 15

The feature of a tooth preparation that resists dislodgment of crown in a vertical direction or along the path of placement is the ________ form.

Answer 15

Retention

Question 16

The feature of a tooth preparation that enhances the stability of a restoration and resist dislodgment along an axis other than the path of placement is the ________ form.

Answer 16

Resistance

Question 17

What are indications for double abutments?

Answer 17

Unfavorable crown:root ratio and long span.

Question 18

A natural tooth located between terminal abutments that save to support a fixed or removable prothesis is called a __________ abutment FPD. How many units does it have?

Answer 18

Pier; five

Question 19

A bridge which has an abutment or abutments at one end only, with the other end of the Pontic remaining unattached is called a ________ FPD.

Answer 19

Cantilevered

Question 20

What is the MAX # of pontics in Cantilevered FPD at all times?

Answer 20

ONE. No matter region of dentition.

Question 21

In the first year following loss of teeth how much loss occurs in height and what percentage width in mandible?

Answer 21

First year following loss of teeth avg of 4mm loss in height and 30% width in mandible.

Question 22

After initial healing residual ridge reduction in mandible continues at an annual rate of _____ to _____ in height. How much more resorption in mandible compared to maxilla?

Answer 22

.1mm-.2mm in height per year. Rate is four times more in mandible compared to maxilla.

Question 23

Denture pts generate only ___% of the bite force generated by dentate individuals. Chewing efficiency is ___% that of dentate individuals.

Answer 23

20% of bite force; chewing efficiency 15-20%

Question 24

What are the 6 appointments/steps for complete dentures?

Answer 24

Appt. 1 Clinic: review history, PAN, exams, etc.. + make preliminary impression with edentulous stock trays and irreversible hydrocolloid alginate material
Appt. 1 Lab: fabricate preliminary or diagnostic cast + custom trays