Influence of the dentin surface properties on the laser radiation absorption

Hana Chmelickova; Hana Sebestova; Helena Hiklova; Lenka Rihakova

doi:10.1117/12.2010260

18 December 2012 Influence of the dentin surface properties on the laser radiation absorption

Hana Chmelickova, Hana Sebestova, Helena Hiklova, Lenka Rihakova

Proceedings Volume 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 86971C (2012) https://doi.org/10.1117/12.2010260
Event: 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2012, Ostravice, Czech Republic

Abstract

Research of the optical radiation interaction with human tooth tissues has started early after the first laser construction. Absorptivity of the particular tissue is dependent on the wavelength, thus CO₂, Er:YAG and Nd:YAG lasers were used in many experimental works all over the world. Near infrared radiation of the pulsed Nd:YAG laser was found to be suitable for dentine hypersensitivity treatment by sealing of the open tubules with melted and re-solidified dentin. Series of experiments were performed to find suitable process parameters in the laser laboratory equipped with the industrial pulsed Nd:YAG laser system. Tooth samples were prepared and classified into five groups according to their different degree of the surface grinding and polishing. Two types of antireflective agents, erythrosine and black ink, were applied on the samples surfaces. Coated samples and reference ones without any agents were treated with a set of increasing pulse energy values. Pulse frequency, pulse length, laser beam diameter on the sample surface and relative speed remained constant. Lines of the melted spots were displayed by confocal microscope; surface profiles were scanned by contact profilometer. Dimensions of the dentine melted spots were extracted from the measured data and their dependence on the laser pulse energy, degree of the surface grinding and type of antireflective agent were evaluated.

Citation Download Citation

Hana Chmelickova, Hana Sebestova, Helena Hiklova, and Lenka Rihakova "Influence of the dentin surface properties on the laser radiation absorption", Proc. SPIE 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 86971C (18 December 2012); https://doi.org/10.1117/12.2010260

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KEYWORDS

Surface finishing

Tissues

Absorption

Teeth

Laser dentistry

Polishing

Antireflective coatings

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