Explore the groundbreaking advancements in root canal disinfection with photon-initiated photoacoustic streaming, a technique that promises superior results in dental care.
Authors: Peters OA, Bardsley S, Fong J, Pandher G, Divito E
Journal: Journal of Endodontics
Objective
The primary objective of this study was to compare the efficacy of three different methods for root canal disinfection: photon-initiated photoacoustic streaming (PIPS) using a pulsed erbium:YAG laser, passive ultrasonic activation, and conventional irrigation. The focus was to determine which method was most effective in reducing bacterial counts and ensuring thorough disinfection of the root canal system.
Materials and Methods
- Seventy human premolars were prepared, sterilized, and contaminated with oral bacteria in situ for one week, then incubated for two more weeks.
- Three groups:
- Conventional irrigation with 6% NaOCl
- Ultrasonic activation of NaOCl
- PIPS with pulsed Er:YAG laser (nonablative settings)
- Irrigation was performed for 60 seconds.
- Bacterial reduction was assessed by sampling and culturing, and histologic sections at 1 mm and 4 mm from the apex were stained and evaluated for remaining bacteria and biofilm.
Key Results
- All three methods significantly reduced bacterial counts.
- PIPS produced more negative bacterial samples and left less apical bacteria/biofilm than ultrasonic or conventional irrigation (P < .05).
- None of the techniques completely eliminated bacteria from the apical third or dentinal tubules.
Conclusion
Laser-activated irrigation with PIPS was superior to ultrasonic and conventional irrigation in reducing apical bacteria and biofilm, but none of the methods achieved complete disinfection of the apical third and dentinal tubules.
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