Endo Basic Treatment (7) Flashcards
What is the most important phase of technical aspect of RCT?
Access opening
T/F: NiTi rotary instruments are more likely to fracture than hand files.
True
Les likely to ledge, more likely to fracture
What is the best indicator of clean walls?
Level of smoothness
What are the indications for using sodium hypochlorite as an irrigant?
- Disinfection
- Dissolved organic matter
- Does not remove smear layer
- Concentrations from 0.5-6%
What are the signs and symptoms of an NaOCl accident?
Intense immediate pain, excessive bleeding from tooth, swelling.
Post-op bruising and nerve deficits.
How is a NaOCl accident treated?
Long acting anesthetic, drainage, steroids, antibiotics, analgesics
T/F: NaOCl and chlorhexidine should be used together.
False
What is the best intracanal medicament?
Calcium hydroxide
T/F: Gutta percha does not require a sealer in order to seal the canal.
False
Gutta percha does not seal without sealer.
Why is anesthesia difficult in patients with large infections?
PH of the abscess
What are the indications for apicoectomy instead of non surgical endo?
- Overextension of obturating material
- Biopsy is necessary
- Root-end filling is necessary
- Apical portion can not be properly cleaned/shaped
How much root tip is removed during root-end resection? How far much of the root is filled with root-end filling material?
3mm; 3mm
What is the best root-end filling material?
MTA
What is the difference between hemisection, bicuspidization, and root resection?
Hemisection - entire half of tooth is removed (root and crown)
Bicuspidization - Tooth is split into two. All components of tooth remain
Root resection - One root is removed. Whole crown remains.
T/F: In an endo emergency, placing a chemical medicament in the pulp chamber will reduce pain for patient.
False
T/F: Reducing occlusion will result in pain relief of symptomatic apical periodontitis.
True
What is the best indicator of a flare-up?
A history of preoperative pain or swelling.
What is the imaging rule that can be applied to distinguish between two canals?
SLOB rule “Same lingual, opposite buccal”
If the X-ray tube is moved to the left, the object that also moves to the left is lingual and the object that moves to the right is buccal
T/F: Condensing osteitis is normally in the presence of a vital pulp.
True
T/F: The infecting microbes of a primary infection are the same as those infecting an unsuccessful RCT.
False
Enterococcus faecalis is seen in unsuccessful RCT but not in primary infection as well as many facultative anaerobes
What is the first choice of antibiotic in endodontics?
- Penicillin V/Amoxicillin
- Clindamycin
- Metronidazole in combo w/ one of the above
