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Related Experiment Video

Updated: Feb 1, 2026

An In Vitro Approach to Photodynamic Therapy

An In Vitro Approach to Photodynamic Therapy

Published on: August 17, 2018

Photodynamic therapy in endodontics.

G Plotino¹, N M Grande², M Mercade^3,4

¹Private Practice, Rome, Italy.

International Endodontic Journal

|December 15, 2018

Summary

Photodynamic therapy (PDT) shows promise for treating root canal infections by using photosensitizers and light to kill microbes. More clinical studies are needed to confirm its effectiveness in live patients.

Keywords:

antimicrobial endodontics photodynamic therapy root canal disinfection

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Area of Science:

Dentistry
Microbiology
Biomedical Engineering

Background:

Photodynamic therapy (PDT) is an established treatment modality that has recently gained attention for its application in endodontics.
PDT offers favorable features for treating microbial infections within root canals.
Its use as an adjunct to standard root canal treatment for periapical lesions is increasingly advocated.

Purpose of the Study:

To review the existing literature on photodynamic therapy in endodontics.
To explore PDT's mechanism of action, photosensitizers, light sources, limitations, and clinical procedures.
To assess PDT's efficacy in reducing bacterial load in endodontic treatments.

Main Methods:

Review of current scientific literature on photodynamic therapy in endodontics.
Analysis of studies investigating PDT's mechanism of action, including photosensitizers and light sources.
Evaluation of in vitro, ex vivo, and in vivo research on bacterial load reduction.

Main Results:

Photodynamic therapy involves microbial exposure to photosensitizers followed by light activation, producing reactive oxygen species that lead to cell death.
Promising results have been demonstrated in vitro and ex vivo for bacterial load reduction.
Fewer in vivo investigations have been conducted compared to in vitro studies.

Conclusions:

Photodynamic therapy is a promising antimicrobial strategy for root canal treatment.
While in vitro results are positive, more extensive in vivo studies are necessary.
Further research is required to establish the clinical efficacy and application of antimicrobial PDT in endodontics.