Related Experiment Video
Updated: Jan 29, 2026

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An Experimental Paradigm for the Prediction of Post-Operative Pain PPOP
Published on: January 27, 2010
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Can lasers help reduce post-root-canal pain more than ultrasonics?
1Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Siksha 'O' Anusandhan University, Bhubaneswar, India. loramishra@soa.ac.in.
Evidence-Based Dentistry
|January 27, 2026
Summary
Laser-activated irrigation (LAI) offers greater short-term postoperative pain reduction compared to ultrasonic activation (UAI) in endodontics. However, ultrasonic activation remains a practical standard due to cost and accessibility.
Area of Science:
- Endodontics
- Dental Technology
- Pain Management
Background:
- Postoperative pain is a common concern following endodontic treatment.
- Ultrasonic activation (UAI) is a standard method for irrigant activation.
- Laser-activated irrigation (LAI) is an emerging technique with potential benefits.
Purpose of the Study:
- To systematically review and meta-analyze randomized controlled trials comparing LAI and UAI for postoperative pain reduction in endodontics.
- To evaluate the efficacy of different laser modalities within LAI.
Main Methods:
- Systematic review and meta-analysis of 7 randomized controlled trials (490 teeth).
- Included studies compared LAI versus UAI with postoperative Visual Analog Scale (VAS) pain measurements.
- Analyzed data using random-effects modeling, subgroup analyses, and GRADE certainty assessment.
Main Results:
- LAI demonstrated a consistently greater reduction in patient-reported pain compared to UAI across multiple time points.
- The most significant pain reduction with LAI was observed between 24-48 hours post-treatment.
- Pulsed Er:YAG laser systems (PIPS, SWEEPS) showed the highest analgesic effect; diode lasers offered minimal benefit. High heterogeneity was noted.
Conclusions:
- LAI, particularly Er:YAG-based systems, offers measurable short-term postoperative pain relief in endodontics.
- Despite benefits, LAI is not recommended as a routine replacement for UAI due to cost and accessibility.
- UAI remains an effective and pragmatic standard for irrigant activation in typical dental practice.
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