ArF excimer laser irradiation of human dentin

Sánchez, F.; Tost, A. J. España; Morenza, J.L.

doi:10.1002/(sici)1096-9101(1997)21:5<474::aid-lsm9>3.0.co;2-n

Cited by 25 publications

(5 citation statements)

References 9 publications

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“…3b and c) reveal that cones develop around dentinal tubules. As previously shown [6,7], the formation of these cones is due to differential ablation. The peritubular dentin presents a higher ablation threshold and a lower ablation rate than the surrounding intertubular dentin.…”

Section: Resultssupporting

confidence: 64%

“…Short pulse duration UV lasers have been investigated for hard dental tissue removal because they cause minimal thermal damage to the dental tissues [1][2][3], heat transfer to the pulp is minimised [4], and the possibility of mutagenic side effects referred when 248 nm wavelength radiation is used in clinical applications [5] will not apply here because cells are not present in this type of tissue. Sánchez et al [6] and Eugénio et al [7] observed the formation of a cone-like surface topography when dentin is processed with pulsed UV laser radiation. Sánchez et al reported the formation of cones in dentin processed with 193 nm laser radiation at fluences ranging from 1.6 to 2.6 J/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

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Surface Texture Development in KrF Excimer Laser Ablation of Dentin

Sivakumar¹,

Vilar²,

Oliveira

2006

MSF

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In the present paper, the influence of tubule orientation and areal density on the development of surface textures by excimer laser processing of dentin is analysed. Disks of dentin 2 mm thick were extracted from caries-free human teeth by cross-sectional cutting above the pulp cavity, polished and fixed using standard procedures. The samples were laser-processed using 100 laser pulses of 248 nm wavelength radiation at a fluence of 1 J/cm2, pulse duration of 30 ns and pulse frequency of 5 Hz. The surface texture after processing depends on the angle between the tubules and the laser beam. In inner dentin, where tubules are parallel to the laser beam, cone-like artefacts form, considerably increasing surface roughness. The cones are constituted by partially melted peritubular dentin and develop because the ablation rate of peritubular dentin is lower than the ablation rate of surrounding intertubular dentin. The areal density of cones is roughly identical to the areal density of tubules except when the tubule density is high enough to allow adjacent cones to coalesce. In outer dentin, where tubules are tilted with respect to the laser beam, the surface remains flat. The reason for this orientation dependence is that, when tubules are tilted towards the laser beam, preferential removal of intertubular dentin will expose an increased area of underlying peritubular dentin to laser radiation preventing cone development.

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Section: Resultssupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Surface Texture Development in KrF Excimer Laser Ablation of Dentin

Sivakumar¹,

Vilar²,

Oliveira

2006

MSF

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“…It can remove the smear layer of canal wall [2] and seal the exposed dentinal tubules [3,4]. However, data in the literature con¯ict about how laser irradiation can alter dentin permeability.…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural changes of human dentin after irradiation by Nd:YAG laser

Lee

Lin

et al. 2002

Lasers Surg Med

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“…This implies that the absorption profiles of solutions can be different in clinical settings when both irrigants and lasers interact with other constituents of the root canal, necessitating further research. Excimer lasers such as argon fluoride, krypton fluoride, and xenon chloride operate in the UV spectrum at wavelengths of 193, 248, and 308 nm [52][53][54]. They have been studied for various applications, including refractive eye surgery [55], dermatological procedures [56], and dentistry [54], because of their ability to ablate tissues with minimal heat.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of pH and Optical Properties of Dual Rinse HEDP Irrigating Solution

Simic,

Papic,

Nikitovic

et al. 2024

Applied Sciences

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This study investigates the pH values and optical characteristics of Dual Rinse HEDP, either independently or combined with sodium hypochlorite (NaOCl), and compares them to other irrigants used in endodontics. The solutions used in this study were commercially acquired and prepared, followed by pH measurements using a pH meter and spectral analysis using UV/Vis spectrophotometry in specified wavelengths of the ultraviolet (UV) C (190–280 nm), UVB (281–315 nm), UVA (316–400 nm), visible light (VL) (401–780 nm), and near-infrared (NIR) spectra (781–1100 nm). The pH analysis revealed alkaline values for NaOCl, EDTA, Dual Rinse HEDP, and the HEDP + NaOCl combination, an acidic value for citric acid, and nearly neutral values for chlorhexidine and distilled water. Spectral analysis revealed the notable absorption characteristics of endodontic irrigants. In the UV range, all solutions exhibited higher absorption values to water (p < 0.05), with Dual Rinse HEDP resembling EDTA and citric acid, and HEDP + NaOCl resembling NaOCl. The NIR region highlights absorption peaks around 975 nm for all solutions, including NaOCl and Dual Rinse HEDP + NaOCl, suggesting potential applications in laser-activated irrigation. This study provides comprehensive insights into the pH and optical features of endodontic irrigants, emphasizing their potential roles in enhancing disinfection strategies and optimizing laser-activated irrigation protocols.

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ArF excimer laser irradiation of human dentin

Cited by 25 publications

References 9 publications

Surface Texture Development in KrF Excimer Laser Ablation of Dentin

Surface Texture Development in KrF Excimer Laser Ablation of Dentin

Ultrastructural changes of human dentin after irradiation by Nd:YAG laser

Evaluation of pH and Optical Properties of Dual Rinse HEDP Irrigating Solution

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