Effects of Lasers and Fluoride Varnish on Microhardness and Calcium and Phosphorus Content of Demineralized Enamel

This study assessed the effects of blue and Er:YAG lasers, fluoride varnish, and their combination on microhardness, and calcium and phosphorus content of demineralized enamel. The primary Vickers microhardness of 28 third molars was measured and their enamel calcium and phosphorous content was quan...

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Bibliographic Details
Published in:Frontiers in dentistry 2024, Vol.21, p.27
Main Authors: Hashemikamangar, Sedighe Sadat, Merati, Hamid, Valizadeh, Sara, Saberi, Sogol
Format: Article
Language:English
Subjects:
Dental Caries
Dental Enamel
Hardness
Lasers
Original
Sodium Fluoride
Tooth Demineralization
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Summary:This study assessed the effects of blue and Er:YAG lasers, fluoride varnish, and their combination on microhardness, and calcium and phosphorus content of demineralized enamel. The primary Vickers microhardness of 28 third molars was measured and their enamel calcium and phosphorous content was quantified by energy-dispersive X-ray spectroscopy. They were then randomly assigned to five groups of 5% sodium fluoride (NaF) varnish, 445nm blue laser, Er:YAG laser, 5% NaF + 445nm blue laser, and 5% NaF + Er:YAG laser. The teeth then underwent pH-cycling to induce caries-like lesions. The surface microhardness of the teeth and the calcium and phosphorous content of demineralized enamel were measured again. Data were analyzed by one-way ANOVA and Tukey's test (alpha=0.05). NaF, NaF-diode laser, and NaF-Er:YAG laser groups experienced a significant increase in microhardness of demineralized enamel close to the baseline value (P
ISSN:2676-296X
2676-296X
DOI:10.18502/fid.v21i27.16142