Par 2 - Restoration of Endodontically Treated Teeth Flashcards
T/F? Anterior teeth w/ modest coronal destruction can be restored w/ composite filling material.
TRUE.
For anterior teeth that have been traumatized (or w/ moderate destruction) sometimes just a lingual composite will be sufficient (therefore a core wouldn’t be necessary)
What is a major cause of root canal treatment failure?
Loss of coronal seal
Cuspal rigidity in maxillary premolars is reduced by ___ % after MOD preparation & endo access.
80%
- KNOW that MX premolars can be easy to break
- Restorations w/ cuspal coverage recovered the strength of the teeth to values similar to sound teeth.
The prognosis for endodontically treated posterior teeth restored with crowns was enhanced ___-fold.
six
How much gutta percha do you leave apically in the canal?
5mm
Largest root to place post in maxillary molar? In mandibular molar?
MX: Palatal canal
MD: Distal canal
Post should occupy at least ___ of the root length in bone.
1/2
T/F? Post placement always strengthens teeth.
FALSE. Post placement may not strengthen teeth. (he said this may be old research data?!)
- Now: due to using rotary instruments, a bonded post in the
canal would be as strong, so it may not weaken anymore.
- Post prep may weaken teeth.
Modulus of elasticity w/ ____ posts are more similar to dentin & thus less chance for root fracture.
fiber
____ posts are screwed into the dentin, putting stress on it.
Threaded
Compared to metal posts, the posts we use today have an elastic modulus that is much closer to dentin, they do NOT require extra prepping. They are ___ rather than cemented.
bonded
T/F? The composite cement is only light curable.
FALSE. It is dual cure, so both self cure or light cure.
A __mm ferrule gave the greatest resistance to fracture regardless of the post system used.
2
*In the case of endo retreatment in a case that contains a fiber post, the post can be…?

Special drills available from the manufacturer
