Selective removal of dental caries with a diode-pumped Er:YAG laser

Ruth Yan; Kenneth H. Chan; Henry Tom; Jacob Simon; Cynthia L. Darling; Daniel Fried

doi:10.1117/12.2083653

24 February 2015 Selective removal of dental caries with a diode-pumped Er:YAG laser

Ruth Yan, Kenneth H. Chan, Henry Tom, Jacob Simon, Cynthia L. Darling, Daniel Fried

Proceedings Volume 9306, Lasers in Dentistry XXI; 93060O (2015) https://doi.org/10.1117/12.2083653
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

Selective removal of caries lesions with high precision is best accomplished using lasers operating at high pulse repetition rates utilizing small spot sizes. Conventional flash-lamp pumped Er:YAG lasers are poorly suited for this purpose, but new diode-pumped Er:YAG lasers have become available operating at high pulse repetition rates. The purpose of this study was to measure the ablation rate and selectivity of sound and demineralized enamel and dentin for a 30 W diode-pumped Er:YAG laser operating with a pulse duration of 20-30-μs and evaluate it's potential for the selective removal of natural occlusal lesions on extracted teeth. Microradiography was used to determine the mineral content of the demineralized enamel and dentin of 300-μm thick sections with natural caries lesions prior to laser ablation. The ablation rate was calculated for varying mineral content. In addition, near-IR reflectance measurements at 1500-1700- nm were used to guide the laser for the selective ablation of natural occlusal caries lesions on extracted teeth.

Citation Download Citation

Ruth Yan, Kenneth H. Chan, Henry Tom, Jacob Simon, Cynthia L. Darling, and Daniel Fried "Selective removal of dental caries with a diode-pumped Er:YAG laser", Proc. SPIE 9306, Lasers in Dentistry XXI, 93060O (24 February 2015); https://doi.org/10.1117/12.2083653

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