WorksheetsCase-Based MCQs – Cleaning & Shaping (Endodontics)
Total questions: 5
Worksheet time: 4mins
While preparing a root canal, a dentist aims to follow Schilder’s principles to allow effective cleaning and obturation. Which canal shape best fulfills this objective?
Uniform diameter
Apically wide canal
Continuously tapered canal
Cylindrical canal
During cleaning and shaping of an infected canal, the operator is careful not to push debris beyond the apex. Which objective is being addressed in this situation?
Mechanical objective
Clinical objective
Biological objective
Restorative objective
Before starting instrumentation, the clinician removes overlying dentin and smooths the internal walls of the access cavity. Why is this step performed first?
To improve obturation
To gain straight-line access
To enlarge the apex
To seal the chamber
A dentist prepares a canal that maintains its original curvature, has smooth walls, and narrows apically. Which canal design has been achieved?
Parallel canal
Irregular canal
Tapered funnel shape
Wide apical shape
While negotiating a narrow-curved canal, the operator uses gentle back-and-forth rotational movements of the file. Which instrumentation motion is being used?
Filing motion
Reaming motion
Watch-winding motion
Circumferential filing
