Endodontics Flashcards
6 cards from real INBDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Endodontics flashcards as text
An apicoectomy involves:
Answer: Surgical removal of the root apex and curettage of periapical tissue
An apicoectomy (root-end resection) involves surgical access, removal of the apical 3 mm of root, and curettage of periapical pathology, followed by root-end filling.
The step-back technique in canal preparation refers to:
Answer: Progressively using larger files at shorter lengths to create a tapered canal
In the step-back technique, after establishing the working length with the master apical file, larger files are used at progressively shorter lengths to create a funnel-shaped taper.
Which sign is pathognomonic for a draining sinus tract of endodontic origin?
Answer: Parulis (stoma) with tracking to the apex of a non-vital tooth
A parulis (sinus tract opening/stoma) that tracks with a gutta-percha cone to the apex of a non-vital tooth on radiograph confirms endodontic origin.
Mineral trioxide aggregate (MTA) is used in endodontics for all of the following EXCEPT:
Answer: Mechanical canal enlargement
MTA is a biocompatible hydraulic cement used for pulp capping, root-end filling, and perforation repair, but it is not used for mechanical canal shaping.
Which of the following is a true statement about the 'phoenix abscess'?
Answer: It is an acute exacerbation of a pre-existing chronic periapical lesion
A phoenix abscess is an acute inflammatory exacerbation of a chronic periapical lesion, often occurring after endodontic instrumentation stirs up the existing pathology.
Obturation of a root canal is considered acceptable when:
Answer: Fill material ends 0–2 mm short of the radiographic apex with no voids
Ideal obturation terminates 0–2 mm short of the radiographic apex (at the apical constriction) with well-adapted gutta-percha and minimal sealer without voids.