Comparative characteristics of endodontic drills

Area of Science:

• Materials Science
• Biomaterials Engineering
• Dental Materials

Background:

• Endodontic instruments undergo significant wear during clinical use.
• The mechanical and physico-chemical properties of endodontic files can degrade over time.
• Understanding material degradation is crucial for instrument longevity and patient safety.

Purpose of the Study:

• To analyze the impact of wear on the mechanical properties and corrosion resistance of Mtwo endodontic files.
• To compare the properties of new files with those used multiple times.
• To identify microstructural changes and potential damage resulting from use and corrosive environments.

Main Methods:

• Microstructural analysis using scanning electron microscopy (SEM).
• Evaluation of mechanical properties (e.g., hardness, flexibility).
• Corrosion resistance testing in a simulated working environment.

Main Results:

• Six-time use of Mtwo files resulted in observable damage at the blade edges.
• Wear caused a lack of continuity in the cutting line.
• Uneven distribution of resistive forces during operation was noted.
• SEM revealed damage potentially linked to the corrosive environment.

Conclusions:

• Repeated use significantly impacts the integrity and performance of endodontic instruments.
• Blade edge damage and cutting line discontinuity can compromise instrument function.
• Corrosion may play a role in the degradation of endodontic files during use.