21 July 1993 Caries-selective ablation: the second threshold
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Proceedings Volume 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II; (1993); doi: 10.1117/12.148316
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
The aim of the study was to describe the appropriate fluence necessary for the effective removal of dental decay by ablation processes without or with at least minimal removal of healthy dentin. The experiments were conducted at two wavelengths [355 nm (frequency tripled, Q-switched Nd:YAG-laser) and 377 nm (frequency doubled, gain-switched Alexandrite-laser)] found to be close to the maximum of preferential absorption of carious dentin over healthy dentin. Optoacoustic techniques were applied to determine the ablation thresholds of healthy and carious dentin. The ablation efficiencies at characteristic fluences were determined using non-tactile microtopography. During all experiments a fiber optic delivery system was engaged.
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Thomas Hennig, Peter Rechmann, Peter Jeitner, Raimund Kaufmann, "Caries-selective ablation: the second threshold", Proc. SPIE 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II, (21 July 1993); doi: 10.1117/12.148316; http://dx.doi.org/10.1117/12.148316
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KEYWORDS
Laser ablation

Absorption

Teeth

Photodiodes

Dental caries

Fiber lasers

Fiber optics

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