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Proceedings Paper

Comparison of the acid resistance of root dentin after treatment with an MIR-FEL emitting at λ=9.0 µm and λ=9.7 µm
Author(s): Manabu Heya; Hiroshi Horiike; Shu Sano; Hiroaki Kumasaki; Yuichi Hashishin; Kazuhisa Sunada; Kazushi Yoshikawa; Masayoshi Inoue
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Paper Abstract

Background and Objective: The surface modification of root dentin by mid-infrared (MIR) pulsed-laser irradiation is a potential candidate for non-invasive treatment to prevent root surface caries. The purpose of this study is to compare the relative acid resistance of root dentin treated with an MIR Free Electron Laser emitting at between 9.0 μm and 9.7 μm. Study Design/Materials and Methods: The average power density was varied over the range 7.5-51.5 W/cm2. After irradiation, the samples were immersed in a 0.1 M lactic acid solution. Acid resistance was estimated as the quantity of Ca dissolved in the solution after immersion times (tim) of 1-22 h. Results: The acid resistance of all samples increased markedly, but only until tim = ~3 h. It did not depend significantly on the laser parameters used. Conclusion: The surface modification of root dentin leads to improved acid resistance, but this only persists for a few hours and therefore represents a poor treatment for root surface caries.

Paper Details

Date Published: 23 March 2005
PDF: 9 pages
Proc. SPIE 5687, Lasers in Dentistry XI, (23 March 2005); doi: 10.1117/12.583011
Show Author Affiliations
Manabu Heya, Osaka Univ. (Japan)
Hiroshi Horiike, Osaka Univ. (Japan)
Shu Sano, Kinki Univ. (Japan)
Hiroaki Kumasaki, Kinki Univ. (Japan)
Yuichi Hashishin, Kinki Univ. (Japan)
Kazuhisa Sunada, Osaka Dental Univ. (Japan)
Kazushi Yoshikawa, Osaka Dental Univ. (Japan)
Masayoshi Inoue, Osaka Dental Univ. (Japan)


Published in SPIE Proceedings Vol. 5687:
Lasers in Dentistry XI
Peter Rechmann; Daniel Fried, Editor(s)

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