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Purpose <p>This study aims to detect the penetration of the Ah-Plus sealer in the apical third using a pulsed (Er, Cr: YSGG) laser with a short pulse duration when the PIPS was used to activate irrigation (photon-induced photoacoustic streaming).</p> Materials and Methods <p>A total of 28 single-rooted mandibular premolars. The laser used is pulsed Er, Cr: YSGG assisted by the PIPS (photon-induced photoacoustic streaming) technique.</p> <p>There are four groups of samples (n = 7) for each:</p> <p>Group 1: Traditional syringe irrigation using 5 ml of 17% EDTA</p> <p>Group 2: passive ultrasonic irrigation using 5 ml of 17% EDTA</p> <p>Group 3: Er, Cr: YSGG laser-induced PIPS using 5 ml of 17% EDTA</p> <p>Group 4: Er, Cr: YSGG laser-induced PIPS using 5 ml of 5.25% NaOCl and 5ml of 17% EDTA</p> <p>The laser parameters were selected according to the pilot study (Air and water 1%, 0.75 W, 5 Hz, and a short pulse duration of 60µs). The irradiated teeth were obturated by Ah plus sealer mixed with Rhodamine B, and the weight percentage was 0.001. Horizontal sectioning was performed at 3mm lengths away from the apex. Four different sites (lingual, distal, mesial, and buccal) were used to determine the depth of sealer penetration. A confocal laser scanning microscope was used to detect the deepest penetration of the sealer. Data analyzed statistically by Dunnett t-tests were p ≤ 0.05.</p> Results <p>The obtained results revealed that Ah plus sealer reached the wall of canals in four positions (lingual, distal, mesial, and buccal) at G4 in comparison to G3 and G2 for the selected laser parameters (Air and water 1%, 0.75 W, 5 Hz, and a short pulse duration of 60µs).</p> Conclusion <p>It is concluded that the pulse duration(60µs) of Er, Cr: YSGG laser was authorized successfully upon irrigation activation to achieve the deepest point in the root canal for four positions (lingual, distal, mesial, and buccal), so the buccal side was the best values of the sealer penetration. The best parameters are used in G4.</p>

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Penetration of Ah-plus sealer in apical third using a pulsed Er, Cr: YSGG laser based on the PIPS technique: confocal microscope study

  • 期刊论文

  • 发表日期：

    2025年3月19日

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  • Nawras Rashid Rasool,
  • Hussein Ali Jawad

摘要

Purpose

This study aims to detect the penetration of the Ah-Plus sealer in the apical third using a pulsed (Er, Cr: YSGG) laser with a short pulse duration when the PIPS was used to activate irrigation (photon-induced photoacoustic streaming).

Materials and Methods

A total of 28 single-rooted mandibular premolars. The laser used is pulsed Er, Cr: YSGG assisted by the PIPS (photon-induced photoacoustic streaming) technique.

There are four groups of samples (n = 7) for each:

Group 1: Traditional syringe irrigation using 5 ml of 17% EDTA

Group 2: passive ultrasonic irrigation using 5 ml of 17% EDTA

Group 3: Er, Cr: YSGG laser-induced PIPS using 5 ml of 17% EDTA

Group 4: Er, Cr: YSGG laser-induced PIPS using 5 ml of 5.25% NaOCl and 5ml of 17% EDTA

The laser parameters were selected according to the pilot study (Air and water 1%, 0.75 W, 5 Hz, and a short pulse duration of 60µs). The irradiated teeth were obturated by Ah plus sealer mixed with Rhodamine B, and the weight percentage was 0.001. Horizontal sectioning was performed at 3mm lengths away from the apex. Four different sites (lingual, distal, mesial, and buccal) were used to determine the depth of sealer penetration. A confocal laser scanning microscope was used to detect the deepest penetration of the sealer. Data analyzed statistically by Dunnett t-tests were p ≤ 0.05.

Results

The obtained results revealed that Ah plus sealer reached the wall of canals in four positions (lingual, distal, mesial, and buccal) at G4 in comparison to G3 and G2 for the selected laser parameters (Air and water 1%, 0.75 W, 5 Hz, and a short pulse duration of 60µs).

Conclusion

It is concluded that the pulse duration(60µs) of Er, Cr: YSGG laser was authorized successfully upon irrigation activation to achieve the deepest point in the root canal for four positions (lingual, distal, mesial, and buccal), so the buccal side was the best values of the sealer penetration. The best parameters are used in G4.