CTE:YAG laser applications in dentistry

Ramesh K. Shori; Daniel Fried; John D. B. Featherstone; Milan R. Kokta; Clifford W. Duhn

doi:10.1117/12.306011

22 April 1998 CTE:YAG laser applications in dentistry

Ramesh K. Shori, Daniel Fried, John D. B. Featherstone, Milan R. Kokta, Clifford W. Duhn

Proceedings Volume 3248, Lasers in Dentistry IV; (1998) https://doi.org/10.1117/12.306011
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

The suitability of CTE:YAG laser radiation was investigated for caries preventive laser treatments and caries ablation. Although, CTE:YAG laser radiation at 2.69 micrometer is less highly absorbed by dental hard tissues than other erbium laser wavelengths, namely 2.79 and 2.94 micrometer, it can readily be transmitted through a conventional low hydroxyl fiber with minimal loss. These studies show that reasonable ablation rates and efficiencies are obtainable with both free running (200 microseconds) and Q-switched (100 ns) laser pulses on both dentin and enamel with the application of a relatively thick layer of water to the tissue surface. The water served to remove tissue char and debris from the ablation site leaving a clean crater. However, mechanical forces produced during the energetic ablative process resulted in peripheral mechanical damage to the tissue. Surface dissolution studies on enamel indicated that CTE:YAG radiation inhibited surface dissolution by organic acid by 60 - 70% compared to unirradiated controls, albeit, at fluences an order of magnitude higher than those required for CO₂ laser radiation. This layer system may be suitable for dental hard tissue applications if mechanical damage can be mitigated. This work was supported by NIH/NIDR Grants R29DE12091 and R01DE09958.

Citation Download Citation

Ramesh K. Shori, Daniel Fried, John D. B. Featherstone, Milan R. Kokta, and Clifford W. Duhn "CTE:YAG laser applications in dentistry", Proc. SPIE 3248, Lasers in Dentistry IV, (22 April 1998); https://doi.org/10.1117/12.306011

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