Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Shape Memory Effect and NiTi Endodontic Files Quiz

10 Questions

0 Views

Shape Memory Effect and NiTi Endodontic Files Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main reason for the unexpected separation of NiTi endodontic rotary files during root canal instrumentation?

Excessive friction against the canal walls

Larger file tip size compared to the canal section

Excessive pressure applied by the operator during filing

Inadequate torsional resistance and cyclic fatigue resistance (correct)

What are the two distinct fracture mechanisms described for NiTi endodontic files?

Excessive pressure and large file tip size

Stress buildup and friction against canal walls

Torsional load fatigue and cyclic fatigue (correct)

Torsional load and excessive rubbing against canal walls

Which of the following situations is most likely to cause torsional fatigue in NiTi endodontic files?

If there is minimal friction against the canal walls

If the instrument tip is larger than the canal section to be shaped (correct)

If the instrument tip is smaller than the canal section to be shaped

If the operator applies minimal pressure on the handpiece during filing

What is the purpose of the device mentioned in the text for testing torsional fatigue resistance of engine-driven NiTi files?

To measure the torsional strength of NiTi files Signup and view all the answers

What is the main advantage of nickel-titanium (NiTi) hand instruments over stainless steel instruments in endodontic procedures?

Superelastic characteristics Signup and view all the answers

What is the main drawback of using NiTi endodontic rotary files in clinical practice?

Unexpected separation of files during use Signup and view all the answers

Which of the following factors does NOT contribute to the weakening of NiTi endodontic files during use?

Inadequate file tip size Signup and view all the answers

What is the main reason for the clinician's misconception about the torsional strength of NiTi endodontic files?

Confusion between superelastic characteristics and torsional strength Signup and view all the answers

Which of the following factors can contribute to torsional load fatigue in NiTi endodontic files?

Excessive pressure applied by the operator during filing Signup and view all the answers

What is the main purpose of improving the torsional resistance and cyclic fatigue resistance of NiTi endodontic files?

To reduce the risk of file separation during use Signup and view all the answers