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Updated: Jul 29, 2025

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Irrigation - does it affect post-operative pain?

Lucy Simpson1, Charlotte Schofield2, Katherine O'Donnell2

  • 1Leeds Teaching Hospitals NHS Trust, Leeds, UK. Lucy.simpson30@nhs.net.

Evidence-Based Dentistry
|May 24, 2023
PubMed
Summary
This summary is machine-generated.

New endodontic irrigation methods, including sonic activation and diode laser irradiation, did not significantly reduce post-operative pain in mandibular molars compared to conventional irrigation. Pain levels decreased across all groups, but no method offered superior pain relief.

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Area of Science:

  • Endodontics
  • Dental Research
  • Pain Management

Background:

  • Symptomatic apical periodontitis in mandibular molars often presents with significant postoperative pain.
  • Effective pain management strategies are crucial for patient comfort following endodontic treatment.
  • Conventional irrigation methods may have limitations in fully addressing pain and disinfection.

Purpose of the Study:

  • To compare the efficacy of sonic irrigation activation and 980 nm diode laser irradiation against conventional irrigation in reducing postoperative pain.
  • To evaluate the impact of different irrigation techniques on pain levels in patients with symptomatic apical periodontitis.
  • To assess whether advanced irrigation methods offer significant pain reduction compared to standard protocols.

Main Methods:

  • A randomized controlled trial involving 80 adult patients diagnosed with symptomatic apical periodontitis in a mandibular molar.
  • Patients were blindly allocated into four groups: conventional irrigation, sonic irrigation activation, laser irradiation with conventional irrigation, and laser irradiation with sonic irrigation activation.
  • Postoperative pain was assessed at 8, 24, 48 hours, and 7 days using a validated pain scale.

Main Results:

  • All irrigation methods resulted in a statistically significant decrease in postoperative pain.
  • No statistically significant differences in pain reduction were observed between the conventional irrigation group and the groups using sonic irrigation activation or laser irradiation.
  • Patient demographics such as gender and age did not significantly influence pain levels or treatment outcomes.

Conclusions:

  • Sonic irrigation activation and 980 nm diode laser irradiation do not provide a significant reduction in postoperative pain for mandibular molars compared to conventional irrigation.
  • Conventional irrigation remains a viable and effective method for managing pain in endodontic treatment.
  • Further research may be needed to explore synergistic effects or different parameters of advanced irrigation techniques.