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Root canal preparation using the second harmonic KTP:YAG laser: a thermographic and scanning electron microscopic
T Machida1, P Wilder-Smith, A M Arrastia
1Department of Endodontics, Showa University School of Dentistry, Tokyo, Japan.
Journal of Endodontics
|February 1, 1995
Summary
This study found that KTP laser settings of 3W, 2s, 5Hz, applied five times, effectively removed root canal smear layer and debris. These parameters remained below the thermal injury threshold for periodontal tissue.
Area of Science:
- Endodontics
- Laser Dentistry
- Biomaterials
Background:
- Root canal preparation aims to clean and shape the canal space.
- Smear layer and debris can impede disinfection and healing.
- Laser technology offers potential for improved root canal cleaning.
Purpose of the Study:
- To investigate the thermal and microstructural effects of KTP laser use in root canal preparation.
- To determine safe and effective KTP laser parameters for smear layer and debris removal.
Main Methods:
- Thermography was used to measure root surface temperatures during laser irradiation.
- Scanning electron microscopy (SEM) evaluated root canal microstructures.
- KTP laser parameters (3W, 2s, 5Hz, five applications) were tested on extracted human teeth.
Main Results:
- KTP laser application effectively removed smear layer and debris from root canal surfaces.
- Measured temperatures remained below the thermal injury threshold for periodontal tissues.
- Optimized parameters were identified for safe and effective laser use.
Conclusions:
- KTP laser irradiation at specific parameters (3W, 2s, 5Hz, five times) is a viable method for root canal cleaning.
- This technique removes smear layer and debris without causing thermal damage to surrounding periodontal tissues.
- Further research can explore clinical applications of KTP laser in endodontics.