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Influence of the Nd:YAG laser pulse duration on the temperature of primary enamel.

Valério RA, da Cunha VS, Galo R, de Lima FA, Bachmann L, Corona SA, Borsatto MC - ScientificWorldJournal (2015)

Bottom Line: Fifteen sound primary molars were sectioned mesiodistally, resulting in 30 specimens (3.5 × 3.5 × 2.0 mm).Nd:YAG laser pulse duration provided no difference on the temperature changes on primary enamel, in which the following means were observed: A = EL (23.15°C ± 7.75), B = LP (27.33°C ± 11.32), and C = SP (26.91°C ± 12.85).It can be concluded that the duration of the laser pulse Nd:YAG increased the temperature of the primary enamel but was not influenced by different pulse durations used in the irradiation.

View Article: PubMed Central - PubMed

Affiliation: Clinical Pediatric Dentistry Department, Ribeirão Preto School of Dentistry, São Paulo University, Café Avenue, Monte Alegre, 14040-904 Ribeirão Preto, SP, Brazil.

ABSTRACT
The aim of this study is to evaluate the temperature change on specimens of primary enamel irradiated with different pulse duration of Nd:YAG laser. Fifteen sound primary molars were sectioned mesiodistally, resulting in 30 specimens (3.5 × 3.5 × 2.0 mm). Two small holes were made on the dentin surface in which K-type thermocouples were installed to evaluate thermal changes. Specimens were randomly assigned in 3 groups (n = 10): A = EL (extra long pulse, 10.000 μs), B = LP (long pulse, 700 μs), and C = SP (short pulse, 350 μs). Nd:YAG laser (λ = 1.064 μm) was applied at contact mode (10 Hz, 0.8 W, 80 mJ) and energy density of 0.637 mJ/mm(2). Analysis of variance (ANOVA) was performed for the statistical analysis (P = 0.46). Nd:YAG laser pulse duration provided no difference on the temperature changes on primary enamel, in which the following means were observed: A = EL (23.15°C ± 7.75), B = LP (27.33°C ± 11.32), and C = SP (26.91°C ± 12.85). It can be concluded that the duration of the laser pulse Nd:YAG increased the temperature of the primary enamel but was not influenced by different pulse durations used in the irradiation.

No MeSH data available.


Initial temperature analyzed before irradiation and thermal changes (°C) measured at specimens of primary enamel during the Nd:YAG laser irradiation.
© Copyright Policy - open-access
Related In: Results  -  Collection


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fig2: Initial temperature analyzed before irradiation and thermal changes (°C) measured at specimens of primary enamel during the Nd:YAG laser irradiation.

Mentions: The initial temperature and thermal changes during Nd:YAG laser irradiation at specimens of primary enamel are shown in Figure 2.


Influence of the Nd:YAG laser pulse duration on the temperature of primary enamel.

Valério RA, da Cunha VS, Galo R, de Lima FA, Bachmann L, Corona SA, Borsatto MC - ScientificWorldJournal (2015)

Initial temperature analyzed before irradiation and thermal changes (°C) measured at specimens of primary enamel during the Nd:YAG laser irradiation.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4385661&req=5

fig2: Initial temperature analyzed before irradiation and thermal changes (°C) measured at specimens of primary enamel during the Nd:YAG laser irradiation.
Mentions: The initial temperature and thermal changes during Nd:YAG laser irradiation at specimens of primary enamel are shown in Figure 2.

Bottom Line: Fifteen sound primary molars were sectioned mesiodistally, resulting in 30 specimens (3.5 × 3.5 × 2.0 mm).Nd:YAG laser pulse duration provided no difference on the temperature changes on primary enamel, in which the following means were observed: A = EL (23.15°C ± 7.75), B = LP (27.33°C ± 11.32), and C = SP (26.91°C ± 12.85).It can be concluded that the duration of the laser pulse Nd:YAG increased the temperature of the primary enamel but was not influenced by different pulse durations used in the irradiation.

View Article: PubMed Central - PubMed

Affiliation: Clinical Pediatric Dentistry Department, Ribeirão Preto School of Dentistry, São Paulo University, Café Avenue, Monte Alegre, 14040-904 Ribeirão Preto, SP, Brazil.

ABSTRACT
The aim of this study is to evaluate the temperature change on specimens of primary enamel irradiated with different pulse duration of Nd:YAG laser. Fifteen sound primary molars were sectioned mesiodistally, resulting in 30 specimens (3.5 × 3.5 × 2.0 mm). Two small holes were made on the dentin surface in which K-type thermocouples were installed to evaluate thermal changes. Specimens were randomly assigned in 3 groups (n = 10): A = EL (extra long pulse, 10.000 μs), B = LP (long pulse, 700 μs), and C = SP (short pulse, 350 μs). Nd:YAG laser (λ = 1.064 μm) was applied at contact mode (10 Hz, 0.8 W, 80 mJ) and energy density of 0.637 mJ/mm(2). Analysis of variance (ANOVA) was performed for the statistical analysis (P = 0.46). Nd:YAG laser pulse duration provided no difference on the temperature changes on primary enamel, in which the following means were observed: A = EL (23.15°C ± 7.75), B = LP (27.33°C ± 11.32), and C = SP (26.91°C ± 12.85). It can be concluded that the duration of the laser pulse Nd:YAG increased the temperature of the primary enamel but was not influenced by different pulse durations used in the irradiation.

No MeSH data available.