Pins

Question 1

Complex Amalgam Restorations- Definitive Restoration -

Answer 1

afford

Question 2

Complex Amalgam Restorations - Foundation Restoration –

Answer 2

prep for crown

Question 3

Complex amalgam restorations - Control Restoration

Answer 3

.) pulpal questions – see how tooth responds to filling before crown.

b. ) periodontal questions – often not good idea to put crown on tooth with periodontal issues (will likely fall out first).
c. ) acute caries
d. ) severe caries

Question 4

Replacing Cusps

Answer 4

When facial or lingual extension exceeds 2/3 the distance from a primary groove towards the cusp tip

When facial-lingual extension of the occlusal preparation exceeds 2/3 the distance between facial-lingual cusps

Question 5

Rule for cusp capping

Answer 5

if extension from a primary groove to cusp tip is no more than half the distance, no cusp capping should be done.

half to 2/3rds, start to consider. If greater than 2/3rds, definately cap it.

Question 6

Types of Pins

Answer 6

Cemented
Friction Locked
Threaded* we use this one

Question 7

Pin size we use

Answer 7

Know these pin sizes. We use 0.024, drill bit we use os 0.021

Question 8

2 drill types

Answer 8

standard and depth limiting

Question 9

Place pins in the

Answer 9

line angles (they have the most available dentin).

Question 10

Pins are placed

Answer 10

2 drill diameters from DEJ. For plastic teeth, mesure 1.5 mm fro outer tooth to second dotted circle. So a little beyond 1.5 mm.

Question 11

Problem – collar needs to be

Answer 11

flat for pin to go in. If you need to go a bit shallow to accommodate for top part. Overall, you need a flat surface to properly place these.

Question 12

If within ½ mm to pulp, you will need a base –

Answer 12

calcium hydroxide. Then you would use a base (GI probably).

Question 13

What to do to make sure GI sticks?

Answer 13

You place a conditioner (to remove smear layer). This conditioner is made of polyacrylic acid.

Question 14

Behind the pin is called the .

Answer 14

recess

Question 15

Retentive wells:

Answer 15

help retain filling

Question 16

2 – 2 – 2 - 2 Rule:

Answer 16

2mm pin hole depth
2 drill diameters inside DEJ
2mm length of pin
2mm amalgam over pin

Should be at least 0.5 mm inside DEJ. Should be 1.5 mm deep.