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Dental Research Journal

Review Article

Effect of photobiomodulation on postoperative endodontic pain:
A systematic review of clinical trials

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Seyyed Amir Seyyedi , Maryam Baghizadeh Fini , Reza Fekrazad , Selda Abbasian , Amir Ardalan Abdollahi 5
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1 Departments of Oral and Maxillofacial Disease, Dental School, Urmia University of Medical Sciences, Urmia, Iran, Master of Health Promotion,
Oklahoma State University, Stillwater, OK, USA, Department of Periodontics, Faculty of Dentistry, AJA University of Medical Sciences, Tehran,
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Iran, Research Schoolar, Faculty of Dentistry, Michigan State University, East Lansing, Michigan, USA, Department of Endodontics, Dental School,
Urmia University of Medical Sciences, Urmia, Iran
ABSTRACT
Background: This review aims to perform a complete evaluation of the impact of
photobiomodulation (PMB) on postoperative endodontic pain.
Materials and Methods: The PRISMA checklist was used to perform this systematic review. The
electronic databases were searched, including Google Scholar, PubMed, and Embase. Sixty‑three
papers were obtained through a main electronic search and a hand search. Nine trials met the
criteria after screening the titles, abstracts, and/or full texts.
Results: Seven out of nine studies showed that PMB has a significant impact on relieving
postoperative endodontic pain, with no statistically significant difference in the severity of pain
Received: 15‑Feb‑2023
Revised: 17‑Oct‑2023 between the laser and control groups in the two remaining studies. In addition, eight studies
Accepted: 04‑Nov‑2023 showed no adverse effects, indicating that we can remove the adverse effects of drugs such as
Published: 25‑Jan‑2024 nonsteroidal anti‑inflammatory drugs. However, one study showed evidence of the consequences
Address for correspondence: of PMB application on teeth with symptomatic irreversible pulpitis. Therefore, it can be concluded
Dr. Amir Ardalan Abdollahi, that PMB should not be used in teeth with pain because of irreversible pulpitis.
Department of Endodontics, Conclusion: Although there is some understanding from a cellular viewpoint of the effects of
Dental School, Urmia PMB, there is still some uncertainty about whether these cell‑level modifications impact reducing
University of Medical
Sciences, Urmia, Iran. the postendodontic pain.
E‑mail: ardalan_2000a@
yahoo.com Key Words: Clinical trial, low‑level light therapy, pain, review, root canal therapy

INTRODUCTION and extracanal), insufficient filling of the canal,
overextension of root filling materials, incorrect
The goal of endodontic treatment is complete coronal seal, and untreated canals. Furthermore,
debridement and cleaning of the root canals of an iatrogenic procedural errors due to poor access cavity
infected tooth so that the root canal space can be shaped design and instrumentation complications (ledges,
and prepared for obturation with a neutral substance to perforations, or separated instruments) could be
prevent or limit any possibilities of reinfection. [1] considered as other etiologies for endodontic failure.
The common factors that can be ascribed to endodontic
failure are the persistence of bacteria (intracanal This is an open access journal, and articles are distributed under the terms
of the Creative Commons Attribution‑NonCommercial‑ShareAlike 4.0
License, which allows others to remix, tweak, and build upon the work
Access this article online non‑commercially, as long as appropriate credit is given and the new
creations are licensed under the identical terms.
For reprints contact: WKHLRPMedknow_reprints@wolterskluwer.com
Website: www.drj.ir
www.drjjournal.net
www.ncbi.nlm.nih.gov/pmc/journals/1480 How to cite this article: Seyyedi SA, Fini MB, Fekrazad R, Abbasian S,
Abdollahi AA. Effect of photobiomodulation on postoperative endodontic
pain: A systematic review of clinical trials. Dent Res J 2024;21:7.

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