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Erschienen in: European Archives of Paediatric Dentistry 6/2022

06.06.2022 | Original Scientific Article

Influence of antimicrobial photodynamic therapy with different pre-irradiation times on children’s dental biofilm: randomized clinical trial

verfasst von: N. G. Lima, R. M. Monteiro, C. P. Torres, A. E. de Souza-Gabriel, E. Watanabe, M. C. Borsatto

Erschienen in: European Archives of Paediatric Dentistry | Ausgabe 6/2022

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Abstract

Purpose

Photodynamic therapy (PDT) is effective in reducing pathogenic microorganisms in the oral cavity and in preventing dental diseases. This study evaluated the pre-irradiation time using PDT (diode laser associated with 0.01% methylene blue) to decrease the number of microorganisms in the visible plaque in permanent teeth.

Methods

This randomized clinical trial included 108 homologous lower permanent first molars (36 and 46) with biofilm from 54 children aged six to 12 years. PDT was performed (0.01% methylene blue photosensitizer/therapeutic laser-InGaAIP), according to the following protocols: Group 1, biofilm collection of the distal area of the lingual surface of 36 µm before PDT; group 2, mesial area of the lingual surface of 36 µm 1 min after PDT; group 3, area of the lingual surface of 46 µm before PDT; and group 4, mesial area of the lingual surface of 46 µm 5 min after PDT.

Results

After statistical analysis, significant differences were observed between the groups (p = 0.000). In groups 2 and 4, the number of bacteria tended to decrease, with a more evident bacterial reduction in group 4.

Conclusions

Pre-irradiation reduced the number of colony-forming units of mature bacterial biofilms in vivo. A time of 5 min resulted in a greater reduction in the number of colony-forming units.

Clinical trial registration

ReBEC Identifier: RBR-6bqfp3; Date of Register: March 2nd, 2020. Retrospectively Registered.
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Metadaten
Titel
Influence of antimicrobial photodynamic therapy with different pre-irradiation times on children’s dental biofilm: randomized clinical trial
verfasst von
N. G. Lima
R. M. Monteiro
C. P. Torres
A. E. de Souza-Gabriel
E. Watanabe
M. C. Borsatto
Publikationsdatum
06.06.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
European Archives of Paediatric Dentistry / Ausgabe 6/2022
Print ISSN: 1818-6300
Elektronische ISSN: 1996-9805
DOI
https://doi.org/10.1007/s40368-022-00716-8

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