Temperature Response in the Pulpal Chamber of Primary Human Teeth Exposed to Nd:YAG Laser Using a Picosecond Pulsed Regime

Lizarelli, R. F. Z.; Moriyama, Lílian Tan; Bagnato, Vanderlei Salvador

doi:10.1089/pho.2006.24.610

Cited by 23 publications

(30 citation statements)

References 20 publications

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“…8,13,15,[20][21][22][23] Kimura et al, 15 during root canal treatment using the Er:YAG laser, verified that the temperature increased less than 6°C at the apical third and less than 3°C at the middle third of the root. Recent studies of the use of the Nd:YAG laser on deciduous teeth, 24 and the Er,Cr:YSGG laser on permanent teeth, 25 verified that the temperature increases seen during irradiation remained below the critical threshold and are safe for clinical use.…”

Section: S Ince the Development Of The Ruby Laser By Maimman Inmentioning

confidence: 99%

Temperature Variation on the External Root Surface During Intracanal Er:YAG Laser Irradiation

Scaini

Souza‐Gabriel²,

Alfredo³

et al. 2008

Photomedicine and Laser Surgery

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Section: S Ince the Development Of The Ruby Laser By Maimman Inmentioning

confidence: 99%

Temperature Variation on the External Root Surface During Intracanal Er:YAG Laser Irradiation

Scaini

Souza‐Gabriel²,

Alfredo³

et al. 2008

Photomedicine and Laser Surgery

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“…Current research in China and elsewhere mainly focuses on the micromorphology, thermal effects, and ablation efficiency of picosecond-laser hard-dental-tissue ablation. [9][10][11][12] On the other hand, there have been fewer studies on ablation-depth control methods with picosecond systems.…”

Section: Discussionmentioning

confidence: 99%

Controlling Dental Enamel–Cavity Ablation Depth with Optimized Stepping Parameters Along the Focal Plane Normal Using a Three Axis, Numerically Controlled Picosecond Laser

Yuan¹,

Lv²,

Wang

et al. 2015

Photomedicine and Laser Surgery

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Objective: The purpose of this study was to establish a depth-control method in enamel-cavity ablation by optimizing the timing of the focal-plane-normal stepping and the single-step size of a three axis, numerically controlled picosecond laser. Background data: Although it has been proposed that picosecond lasers may be used to ablate dental hard tissue, the viability of such a depth-control method in enamel-cavity ablation remains uncertain. Methods: Forty-two enamel slices with approximately level surfaces were prepared and subjected to two-dimensional ablation by a picosecond laser. The additive-pulse layer, n, was set to 5,10,15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70. A three-dimensional microscope was then used to measure the ablation depth, d, to obtain a quantitative function relating n and d. Six enamel slices were then subjected to three dimensional ablation to produce 10 cavities, respectively, with additive-pulse layer and single-step size set to corresponding values. The difference between the theoretical and measured values was calculated for both the cavity depth and the ablation depth of a single step. These were used to determine minimum-difference values for both the additive-pulse layer (n) and single-step size (d). Results: When the additive-pulse layer and the single-step size were set 5 and 45, respectively, the depth error had a minimum of 2.25 lm, and 450 lm deep enamel cavities were produced. Conclusions: When performing three-dimensional ablating of enamel with a picosecond laser, adjusting the timing of the focal-plane-normal stepping and the single-step size allows for the control of ablation-depth error to the order of micrometers.

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“…Firstly because most available studies used permanent teeth (4) and it is important to considerer the differences between permanent and primary substrates. in addition, there is not yet a consensus regarding the parameter settings for primary teeth, and a wide variation exists in energy density, pulse duration and mode of application of lasers, apart from different demineralization protocols (5)(6)(7)(8)(9). Lack of standardization shows the need of establishing safe parameters for use of lasers in caries prevention.…”

Section: Discussionmentioning

confidence: 99%

“…The combination of Nd:YAG laser and topical fluoride application has been suggested to decrease acid demineralization of enamel of permanent teeth (4), but only few studies have assessed the interaction of this laser combined or not with topical fluoride with the enamel of primary teeth (5)(6)(7)(8)(9). The ideal conditions of use of Nd:YAG laser in caries prevention have not yet been elucidated, especially in primary teeth, which have a fundamental role in the development and stabilization of the stomatognathic system, contributing on the masticatory function, esthetics and space maintaince for the permanent successors.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nd:YAG laser combined with fluoride on the prevention of primary tooth enamel demineralization

et al. 2012

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Most studies dealing with the caries preventive action of Nd:YAG laser have been done in permanent teeth and studies on primary teeth are still lacking. The aim of this study was to evaluate in vitro the effect of Nd:YAG laser combined or not with fluoride sources on the acid resistance of primary tooth enamel after artificial caries induction by assessing longitudinal microhardness and demineralization depth. Sixty enamel blocks obtained from the buccal/lingual surface of exfoliated human primary molars were coated with nail polish/wax, leaving only a 9 mm² area exposed on the outer enamel surface, and randomly assigned to 6 groups (n=10) according to the type of treatment: C-control (no treatment); APF: 1.23% acidulated phosphate fluoride gel; FV: 5% fluoride varnish; L: Nd:YAG laser 0.5 W/10 Hz in contact mode; APFL: fluoride gel + laser; FVL: fluoride varnish + laser. After treatment, the specimens were subjected to a des-remineralization cycle for induction of artificial caries lesions. Longitudinal microhardness data (%LMC) were analyzed by the Kruskal-Wallis test and demineralization depth data were analyzed by oneway ANOVA and Fisher's LSD test (á=0.05). APFL and APF groups presented the lowest percentage of microhardness change (p<0.05). Demineralization depth was smaller in all treated groups compared with the untreated control. In conclusion, Nd:YAG laser combined or not with fluoride gel/varnish was not more effective than fluoride alone to prevent enamel demineralization within the experimental period.

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Temperature Response in the Pulpal Chamber of Primary Human Teeth Exposed to Nd:YAG Laser Using a Picosecond Pulsed Regime

Abstract: We have shown that the Nd:YAG picosecond-pulsed laser is a safe tool for ablation of primary teeth in a broad range of operational parameters.

Cited by 23 publications

References 20 publications

Temperature Variation on the External Root Surface During Intracanal Er:YAG Laser Irradiation

Temperature Variation on the External Root Surface During Intracanal Er:YAG Laser Irradiation

Controlling Dental Enamel–Cavity Ablation Depth with Optimized Stepping Parameters Along the Focal Plane Normal Using a Three Axis, Numerically Controlled Picosecond Laser

Effect of Nd:YAG laser combined with fluoride on the prevention of primary tooth enamel demineralization

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