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[Mechanical instrumentation of the root canals. A study using SEM and computerized image analysis]
C M Ferrer Luque1, S González López, J M Navajas Rodríguez de Mondelo
1Faculté d'Odontologie, Universitè de Grenade.
Summary
Ultrasonic and sonic instrumentation effectively remove smear layer with citric acid or EDTA. Ultrasonic methods showed greater smear layer removal efficiency than sonic methods for root canal cleaning.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Smear layer removal is crucial for effective root canal treatment.
- Mechanical instrumentation generates a smear layer that can impede healing.
Purpose of the Study:
- To compare the effectiveness of ultrasonic and sonic instrumentation in smear layer removal.
- To evaluate the efficacy of different irrigants in conjunction with these techniques.
Main Methods:
- Root canals were instrumented using ultrasonic and sonic devices.
- Scanning Electron Microscopy (SEM) was used for evaluation.
- Computerized image analysis calculated effective diffusion areas.
Main Results:
- Citric acid (10-50%) and 15% EDTA were effective with both instrumentation types.
- Ultrasonic instrumentation resulted in significantly larger effective diffusion areas than sonic.
- Sodium hypochlorite and hydrogen peroxide were ineffective for smear layer removal.
Conclusions:
- Ultrasonic instrumentation is more effective than sonic for smear layer removal.
- Acidic irrigants like citric acid and EDTA are efficient for smear layer dissolution.
- Further research into optimal irrigation protocols is warranted.