Canal shaping with a reciprocating system is easy to learn.

Area of Science:

• Endodontics
• Dental Education

Background:

• Assessing learning curves is crucial for standardizing endodontic training.
• Determining adequate sample sizes for skill acquisition studies is essential for reliable outcomes.

Purpose of the Study:

• To establish the optimal number of simulated root canals needed to achieve a plateau in learning for canal shaping.
• To define a benchmark for evaluating performance improvements in endodontic procedures.

Main Methods:

• 216 simulated resin block canals were instrumented by novice and experienced endodontists using Reciproc R25 files.
• Instrumentation time and canal dimensional changes at six points were analyzed.
• Statistical analysis using Student's t-test (P < 0.05) compared performance metrics.

Main Results:

• Novice operators showed significant time variations initially, but not dimensional changes.
• Experienced operators reached stable instrumentation times after the fifth canal, with no significant dimensional variations.
• Performance stabilization was observed by the fifth canal for experienced practitioners.

Conclusions:

• A sample size of six simulated canals is sufficient to demonstrate competence in root canal shaping.
• This finding is applicable for both research studies and educational settings involving new endodontic instruments.