A model system for evaluating filing technique

Area of Science:

• Dental Mechanics
• Endodontic Training
• Biomedical Engineering

Background:

• Root canal preparation requires precise control of forces to avoid procedural errors.
• Current methods for teaching endodontic filing techniques lack objective feedback on applied loads.
• Understanding the forces applied during instrumentation is crucial for effective root canal treatment.

Purpose of the Study:

• To develop and validate a novel model system for demonstrating and quantifying forces during root canal preparation.
• To assess the impact of visual feedback on the filing technique of dental operators.
• To evaluate the long-term retention of improved endodontic filing techniques.

Main Methods:

• A model system was created using a mounted molar on a beam with a strain gauge attached to a phantom head jaw.
• Ten operators performed root canal preparation, with applied loads recorded graphically.
• Operators received instruction based on the graphical feedback and repeated the procedure; technique retention was assessed after one year.

Main Results:

• Initially, operators applied constant lateral forces using a push-pull motion.
• After instruction with visual feedback, operators adopted slower stroke rates and applied higher forces (P < 0.01).
• The improved technique was retained one year after the initial training.

Conclusions:

• The developed model system provides effective visual feedback for operators during root canal preparation.
• This system serves as a valuable aid for teaching and refining endodontic filing techniques.
• Visual feedback can lead to significant and lasting improvements in dental procedural skills.