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Root canal shaping using rotary nickel-titanium files in preclinical teaching
M Georgelin-Gurgel1, R Devillard, M E Lauret
1Université Paul Sabatier, CH Purpan, Toulouse, France.
Odonto-Stomatologie Tropicale = Tropical Dental Journal
|July 16, 2008
Summary
Manual endodontic instrumentation is safer for inexperienced dental students than nickel-titanium (Ni-Ti) rotary techniques. Specific training is crucial for Ni-Ti rotary file use to prevent file breakage and improve preclinical endodontic education.
Area of Science:
- Dental Education
- Endodontics
- Iatrogenic Events
Background:
- Preclinical endodontic training is essential for dental students.
- Evaluating iatrogenic events during root canal shaping is critical for patient safety.
- Comparing manual stainless steel and nickel-titanium (Ni-Ti) rotary techniques provides insights into safer practices.
Purpose of the Study:
- To assess the prevalence of iatrogenic events in preclinical endodontic teaching.
- To compare manual stainless steel files with Ni-Ti rotary techniques for root canal shaping.
- To identify potential risks associated with each instrumentation method.
Main Methods:
- 104 natural teeth were shaped by 26 inexperienced dental students (13 per group).
- Group R utilized Ni-Ti rotary files; Group M used manual stainless steel files.
- Evaluated outcomes included file breakage, loss of working length, and apical foramen iatrogenic instrumentation.
Main Results:
- Overall adverse event rates were similar (58% Ni-Ti rotary vs. 51% manual).
- File breakage (7.7%) and significant working length loss (6.7%) occurred exclusively in the Ni-Ti rotary group.
- Iatrogenic shaping of apical foramina occurred with equal frequency in both groups.
Conclusions:
- Manual instrumentation demonstrated greater safety for novice students compared to Ni-Ti rotary techniques.
- Specific preclinical training is necessary to mitigate risks like file breakage with Ni-Ti rotary instruments.
- Endodontic curricula require re-evaluation to enhance student proficiency and safety in root canal preparation.
