Dentin hypersensitivity treatment by CO2 laser: the influence of the density of dentin tubules and laser-beam incidence

Carmen Colojoara; Shimon Gabay; Freerk W. van der Meulen; Martin J. C. van Gemert; Mariana I. Miron; Androniki Mavrantoni

doi:10.1117/12.297863

22 December 1997 Dentin hypersensitivity treatment by CO2 laser: the influence of the density of dentin tubules and laser-beam incidence

Carmen Colojoara, Shimon Gabay, Freerk W. van der Meulen, Martin J. C. van Gemert, Mariana I. Miron, Androniki Mavrantoni

Author Affiliations +

Proceedings Volume 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy; (1997) https://doi.org/10.1117/12.297863
Event: BiOS Europe '97, 1997, San Remo, Italy

Abstract

Dentin hypersensitivity is considered to be a consequence of the presence of open dentin tubules on the exposed dentin surface. Various methods and materials used in the treatment of this disease are directed to achieve a tubule's occlusion. The purpose of this study was to evaluate under scanning electron microscopy and clinical method the sealing effects of CO₂ laser on dentin tubules of human teeth without any damages of the surrounding tissues. Samples of freshly extracted noncarious 3^rd molars were used. The teeth were randomly divided in to two groups A and B. The samples of group A were exposed to laser beam in cervical area, directed parallel to their dentin tubules. The teeth of group B were sectioned through a hypothetical carious lesion and lased perpendicularly or obliquely of the dentin tubules. The CO₂ laser, at 10.6 micrometers wavelength, was operated only in pulse mode and provided 6.25 - 350 mJ in a burst of 25 pulses each of 250 microsecond(s) time duration with a 2 ms time interval between successive pulses (repetition rate up to 500 mH). Melting of dentin surface and partial closure of exposed dentin tubules were found for all specimens at 6.25 to 31.25 mJ energy. Our results indicated that using CO₂ laser in a parallel orientation of laser beam with dentin tubules, the dentin sensitivity can be reduced without any damages of pulp vitality.

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Carmen Colojoara, Shimon Gabay, Freerk W. van der Meulen, Martin J. C. van Gemert, Mariana I. Miron, and Androniki Mavrantoni "Dentin hypersensitivity treatment by CO2 laser: the influence of the density of dentin tubules and laser-beam incidence", Proc. SPIE 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy, (22 December 1997); https://doi.org/10.1117/12.297863

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KEYWORDS

Carbon dioxide lasers

Carbon monoxide

Gas lasers

Teeth

Pulsed laser operation

Scanning electron microscopy

Tissues

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