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August 22, 2026CureusOpen Access

Comparative Evaluation of Depth of Irrigant Penetration Using Different Irrigation Systems: An In Vivo Study

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Authors

AOAkshata OhmRMRishi MananDMDr.Priyanka Mishra

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Overview

In vivo study demonstrates superior apical irrigant penetration with diode laser activation in mandibular molars, suggesting improved root canal disinfection efficacy.

Key Points

  • To compare the depth of irrigant penetration achieved by conventional manual irrigation, passive ultrasonic irrigation, sonic irrigation, air-sonic irrigation, and diode laser-assisted irrigation in mandibular first molars.
  • Conducted an in vivo study in 50 mandibular first molars requiring primary root canal treatment, allocated to five irrigation activation groups (n = 10 per group).
  • Evaluated irrigant penetration using iohexol contrast medium on standardized digital radiographs, measuring the linear distance between the working length and maximum dye penetration.
  • Apical penetration differed significantly across irrigation activation techniques (p < 0.001, η² = 0.55), with distance to working length smallest in diode laser (0.33 ± 0.26 mm), followed by sonic (0.72 ± 0.42 mm), air-sonic (0.87 ± 0.59 mm), passive ultrasonic (1.23 ± 0.78 mm), and conventional manual irrigation (2.27 ± 0.88 mm).
  • Diode laser-assisted, sonic, air-sonic, and passive ultrasonic irrigation all demonstrated significantly greater penetration than conventional manual irrigation (all p < 0.05).
  • Diode laser-assisted irrigation significantly outperformed passive ultrasonic irrigation (p = 0.028), while differences between diode laser, sonic, and air-sonic irrigation were not statistically significant (p > 0.05).

Cite This Study

Ohm et al. (2026) studied this question.

synapsesocial.com/papers/6a895ffeca7ade938187f071https://doi.org/10.7759/cureus.114841
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