Build ups and foundations

Question 1

What determines a liner?

Answer 1

-less than .5 mm of material placed in a cavity preparation

Question 2

Calcium hydroxide is a liner and it has a pH of about 11, what does that cause?

Answer 2

• It makes it bacteriostatic
• Stimulates the pulp to make secondary dentin
• pulpal irritant
• Extracts Growth factors from the dentin matrix

Question 3

T/F Glass ionomers should be used as pulp capping agents.

Answer 3

False

-Should not

Question 4

Are resins recommended for direct pulp capping?

Answer 4

-No

Question 5

What are some important properties of resin liners?

Answer 5

• High compressive strength
• High tensile strength
• Low solubility

Question 6

How much of the tooth has to be missing in a vital tooth to do build ups?

Answer 6

Over 1/2 of coronal tooth structure

Question 7

What is the ideal post length?

Answer 7

2/3 to 3/4 of root length

Question 8

Where do tapered posts produce the greatest stress at?

Answer 8

-The coronal shoulder

Question 9

What might be the best overall post shape?

Answer 9

-Parallel post with a tapered apical end

Question 10

Where is the best place to place pins?

Answer 10

-Line angles approximately .5 to 1 mm inside DEJ

Question 11

How should a pin be placed with respect to the tooth?

Answer 11

-Parallel outer surface of root

Question 12

Should glass ionomers be used as pulp capping agents?

Answer 12

-No

Question 13

How many mm of gutta-percha must remain at apex when doing a post?

Answer 13

4-5 mm

Question 14

What type of cement should you not use for posts?

Answer 14

-Resin-reinforced glass ionomer cements because of post set expansion

Question 15

How do you get cement into the canal?

Answer 15

• Lentulo spiral (can’t use on relyX unicem or fujicem)
• wipe the post through the cement then insert into the canal ( Do this several times)
• Needle tube

Question 16

T/F For best retention of a post it was found that post surfaces should be smooth

Answer 16

False

-Should not be smooth