Efficacy of Photoinduced Photoacoustic Streaming and Diode Laser Irrigation Techniques on Smear Layer Removal, Sealer Penetration and Push-out Bond Strength Effects of PIPS & Diode Laser Irrigation Techniques
Journal of Lasers in Medical Sciences,
Vol. 13 (2022),
10 January 2022
,
Page e12
Abstract
Introduction: The present study aimed to test the efficiency of photoinduced photoacoustic streaming using 2940 nm Er: YAG laser and 980 nm diode laser agitation on smear layer removal, sealer penetration, and push-out bond strength.
Methods: 60 single canaled human permanent teeth were collected. Specimens were grouped into three experimental groups (20 teeth in each group), depending on the activation protocol used for final irrigation: Group I (needle agitation), group II (980nm diode laser agitation), and group III (photon induced photoacoustic streaming (PIPS) using 2940 nm Er: YAG laser. The quantity of irrigant was standardized in all groups to 4 ml. The irrigant was activated for 40 seconds in different groups under continuous flow. Two teeth from each group were used to check the smear layer removal, then the remaining teeth in each group were randomly divided into three equal experimental subgroups according to the methods of evaluation used: subgroup A: Sealing ability evaluated by dye penetration method; subgroup B: SEM for sealer penetration; and subgroup C: Push-out bond strength assessed by the universal test machine.
Results: results showed that the PIPS group had opened dentinal tubules, while the least cleaning effect was found in the Sidevented needle group. As for Sealing ability and dye penetration, a statistically significant difference was found between all of the three groups, with the Er:YAG laser (PIPS) having the best sealing ability and sealer penetration. Push-out bond strength results showed no statistically significant difference between diode and Er:YAG groups, with a significant difference between each of them and the Side-vented needle group.
Conclusion: Using the diode or Er: YAG laser for irrigant activation led to better irrigant penetration and smear layer removal which subsequently led to obvious sealer penetration, better sealing, and strength properties of endodontic treated teeth.
- Diode laser, Er:YAG laser, PIPS, laser agitation, smear layer removal, Sealer penetration, Push-out bond strength
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References
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