1 May 2006 Influence of the water content in dental enamel and dentin on ablation with erbium YAG and erbium YSGG lasers
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Abstract
The theory of the ablation of dental hard tissue with erbium lasers is based on a process of thermomechanical interaction, which is explained by the absorption of the radiation in the water component of the tissue. The abrupt evaporation of the water is the cause of tissue fragments being blasted out of the tooth structure. The aim of this study is to examine the effect of the water contained in dental hard tissues on the efficiency of ablation. 192 specimens of both bovine dental enamel and bovine dentin are irradiated with an Er:YAG and an Er,Cr:YSGG laser. Half of the specimens are dehydrated beforehand. Irradiation is carried out in subgroups: without water spray and with water spray at flow rates of 0.8 and 3 ml/s. The ablated volume is determined following histological preparation. Only in dentin, and then only with irradiation with the Er:YAG laser, is the water contained in the tissue found to have a significant influence (p<0.0001) on the ablated volume. The water content has no effect on the efficiency of laser ablation in any of the other test groups. In contrast, the externally supplied water always has a significant influence on the effectiveness of the ablation process.
© (2006) Society of Photo-Optical Instrumentation Engineers (SPIE)
Jörg Meister, Jörg Meister, René Franzen, René Franzen, Katharina Forner, Katharina Forner, Henning Grebe, Henning Grebe, Sven Stanzel, Sven Stanzel, Friedrich Lampert, Friedrich Lampert, Christian Apel, Christian Apel, } "Influence of the water content in dental enamel and dentin on ablation with erbium YAG and erbium YSGG lasers," Journal of Biomedical Optics 11(3), 034030 (1 May 2006). https://doi.org/10.1117/1.2204028 . Submission:
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