Debris extrusion by glide-path establishing endodontic instruments with different geometries

Area of Science:

• Endodontics
• Dental Materials Science

Background:

• Glide-path preparation is crucial in endodontics to prevent root canal shaping instrument fractures.
• Understanding debris extrusion is vital for procedural safety and efficacy.

Purpose of the Study:

• To compare the amount of apically extruded debris produced by different glide-path preparation instruments.
• To evaluate the influence of instrument design on debris extrusion during glide-path creation.

Main Methods:

• Forty extracted teeth were divided into four groups (n=10).
• Glide-paths were created using One G, ProGlider, ScoutRace (size 15), and a size 15 stainless-steel K-file.
• Apically extruded debris was collected, weighed, and statistically analyzed.

Main Results:

• ProGlider produced significantly less debris extrusion than other instruments (P < 0.05).
• One G and ScoutRace showed no significant difference but produced less debris than the stainless-steel K-file (P < 0.05).

Conclusions:

• Nickel-titanium rotary files significantly reduce apically extruded debris compared to manual stainless-steel files.
• Instrument design features (e.g., progressive taper, center-off cross-section) may enhance debris removal efficiency.
• NiTi rotary glide-path preparation offers superior clinical efficiency with minimal debris extrusion.