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Histological changes induced by CO2 laser microprobe specially designed for root canal sterilization: in vivo study
Journal of Clinical Laser Medicine & Surgery
|January 20, 1999
Summary
A novel carbon dioxide (CO2) laser microprobe effectively sterilizes root canals, even in the difficult apical region. This new delivery system offers enhanced thermal effects for improved endodontic treatment outcomes without damaging surrounding tissues.
Area of Science:
- Endodontics
- Laser Dentistry
- Biomedical Engineering
Background:
- Conventional root canal preparation struggles to eliminate pulp tissue in the apical region.
- Existing CO2 laser delivery systems lack a suitable fiber for effective apical treatment.
Purpose of the Study:
- To design and evaluate a novel microprobe for CO2 laser endodontic radiation in the apical region.
- To assess the efficacy of the microprobe in sterilizing root canals and its thermal effects on surrounding tissues.
Main Methods:
- A CO2 laser microprobe was coupled to a specialized handpiece and delivery fiber.
- The system was tested on 20 human teeth undergoing conventional root canal preparation; 10 served as controls.
- Temperature at the root surface was monitored, not exceeding 38°C.
Main Results:
- Histological examination revealed coagulation necrosis and vacuolization of pulp tissue, with normal dentin.
- Gram stain and bacteriologic examination confirmed complete root canal sterilization.
- No thermal damage to surrounding tissues was observed.
Conclusions:
- The developed CO2 laser microprobe effectively sterilizes root canals, particularly in the apical region.
- This technology offers a significant advancement for endodontic treatment, improving root canal filling quality.