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Lasers in Dental Science

Erschienen in:

20.06.2023 | Original Article

Comparison of different doses of Er:YAG laser irradiation combined with MI-varnish on the inhibition of enamel demineralization

verfasst von: Mohamad Sadegh Ahmad Akhoundi, Sohrab Asefi, Masih Ghaleshahi, Nasim Chiniforush, Marzieh Nejatifard

Erschienen in: Lasers in Dental Science | Ausgabe 3/2023

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Abstract

Purpose

White spot lesions during fixed orthodontic treatment can be prevented by the application of lasers, fluoride varnishes or products containing calcium-phosphorus. This novel study aimed to evaluate the effect of different doses of Er:YAG laser irradiation combined with casein phosphopeptide-amorphous calcium phosphate varnish (MI varnish 5% NaF with 2% CPP-ACP) on the prevention of enamel demineralization around orthodontic brackets.

Methods

Buccal surface of eighty extracted human permanent premolars was prepared. Specimens were randomly divided into 8 groups (i.e., 10 per each): A: Er:YAG laser with 0.9 mm tip B: Group A + varnish C: Er:YAG laser with 7 mm tip D: Group C +varnish E: Er:YAG laser with 1.3 mm tip F: Group E+ varnish G: MI varnish H: control. Er:YAG laser was irradiated at energy densities as 10 J/cm², 620 J/cm² or 300 J/cm². The teeth were further subjected to 10-day pH cycling (6-h demineralization /18-h remineralization). The excrement of calcium and phosphorous ions was quantified by inductively coupled plasma (ICP).

Results

The laser treatments with 1.3, 0.9, and 7 mm diameter and the interaction of laser and MI varnish have no significant preventive effect against enamel demineralization, but MI varnish application (p value = 0/005) reduced enamel white spots.

Conclusions

There was a tendency to higher caries resistance by MI varnish application However, Er:YAG laser irradiation did not have a remarkable effect on demineralization control.

Clinical Relevance

MI varnish can control caries, whereas Er:YAG laser irradiation does not have a protective effect.

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Titel: Comparison of different doses of Er:YAG laser irradiation combined with MI-varnish on the inhibition of enamel demineralization
verfasst von: Mohamad Sadegh Ahmad Akhoundi
Sohrab Asefi
Masih Ghaleshahi
Nasim Chiniforush
Marzieh Nejatifard
Publikationsdatum: 20.06.2023
Verlag: Springer International Publishing
Erschienen in: Lasers in Dental Science / Ausgabe 3/2023
Elektronische ISSN: 2367-2587
DOI: https://doi.org/10.1007/s41547-023-00192-3

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Comparison of different doses of Er:YAG laser irradiation combined with MI-varnish on the inhibition of enamel demineralization