Treatment of Non-Vital Teeth for Post and Core Flashcards
Minimally acceptable ferrule height
1mm
Ferrule height that gives maximum benefit
2mm or more
Minimum accepted width of ferrule
1mm (not as well understood and may be more important than we think)
Which ferrule walls are most important?
Buccal and Lingual
Two types of post and core techniques (indirect vs direct)
Cast post and core (indirect) and Prefab (direct)
Why are parallel post system drills risky?
Canals are naturally tapered
Recommended Post diameters: Maxillary
- Centrals
- Laterals
- Canine
- First premolar
- 1.5mm
- 1.3mm
3 1.5mm - 0.9mm
Post space length for most teeth?
8-10mm
Post space dimensions:
- File size
- length of canal?
- Amount of gutta purcha reamaining
- 2 sizes greater from final fill
- 2/3 the length of the canal
- 4-5mm of gutta purcha remaining
What end do you modify post in parallel system?
Apical end
Cement post with?
Rely-x Luting-RMGIC
What is special about Paracore buildup material?
Have to use the adhesive system that comes with it.
Where should you trim the post length?
1.5-2mm clearance from opposing tooth
How do you know what size of prefab post to use?
Corresponds to last drill size (color coated)
What type of prefab posts do we use at the COD
Parellel posts
Prefab post cementation process
- Clean tooth with NaOCL, rinse and dry
- Cement with RelyX Unicem (no adhesive system)
- Seat post with moderate pressure and clean excess
- Light cure for 40 sec or self cure for 5min
What should e done to ferrule edges for cast post and core?
Flatten to get positive stop (at least 1mm)
