Treatment of Non-Vital Teeth for Post and Core

Question 1

Minimally acceptable ferrule height

Answer 1

1mm

Question 2

Ferrule height that gives maximum benefit

Answer 2

2mm or more

Question 3

Minimum accepted width of ferrule

Answer 3

1mm (not as well understood and may be more important than we think)

Question 4

Which ferrule walls are most important?

Answer 4

Buccal and Lingual

Question 5

Two types of post and core techniques (indirect vs direct)

Answer 5

Cast post and core (indirect) and Prefab (direct)

Question 6

Why are parallel post system drills risky?

Answer 6

Canals are naturally tapered

Question 7

Recommended Post diameters: Maxillary

1. Centrals
2. Laterals
3. Canine
4. First premolar

Answer 7

1. 1.5mm
2. 1.3mm
   3 1.5mm
3. 0.9mm

Question 8

Post space length for most teeth?

Answer 8

8-10mm

Question 9

Post space dimensions:

1. File size
2. length of canal?
3. Amount of gutta purcha reamaining

Answer 9

1. 2 sizes greater from final fill
2. 2/3 the length of the canal
3. 4-5mm of gutta purcha remaining

Question 10

What end do you modify post in parallel system?

Answer 10

Apical end

Question 11

Cement post with?

Answer 11

Rely-x Luting-RMGIC

Question 12

What is special about Paracore buildup material?

Answer 12

Have to use the adhesive system that comes with it.

Question 13

Where should you trim the post length?

Answer 13

1.5-2mm clearance from opposing tooth

Question 14

How do you know what size of prefab post to use?

Answer 14

Corresponds to last drill size (color coated)

Question 15

What type of prefab posts do we use at the COD

Answer 15

Parellel posts

Question 16

Prefab post cementation process

Answer 16

1. Clean tooth with NaOCL, rinse and dry
2. Cement with RelyX Unicem (no adhesive system)
3. Seat post with moderate pressure and clean excess
4. Light cure for 40 sec or self cure for 5min

Question 17

What should e done to ferrule edges for cast post and core?

Answer 17

Flatten to get positive stop (at least 1mm)