書誌事項
- タイトル別名
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- Effects of Er: YAG laser irradiation on human extracted teeth.
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抄録
The ablation effects of the Erbium: YAG laser (wave length: 2.94μm) on the human extracted teeth were examined histopathologically.<BR>The enamel surface of the human extracted tooth was irradiated by the laser at 500 mJ, 1 pps or 3 pps; 3, 15, 30, 50 and 100 shots. After observation under a dissecting microscope, the teeth were placed in a demineralizing solution of 0.1 M lactate buffer with 6% hydroxyethyl cellulose (pH 4.5) in order to evaluate the acid resistance of the enamel adjacent to the ablated area. After 4 days, the degree of demineralization of the surrounding enamel was assessed by contact microradiography.<BR>The result showed that every irradiated tooth had a clear-cut defect, and almost all the teeth had acquired acid resistance at the enamel surrounding the ablated portion.<BR>The other experiment was carried out to estimate the effects of the Er: YAG laser through a contact probe. The enamel, dentin and cementum of the extracted teeth were irradiated at 39 mJ or 74 mJ, 10 pps; 10 shots. The teeth were observed under a dissecting microscope.<BR>The result clearly indicated that the Er: YAG laser guided by the contact probe could also produce a defect in the dental hard tissue.<BR>The above-mentioned findings suggested that the Er: YAG laser could pave the way for the cavity preparation with acid-resistant cavity margin.
収録刊行物
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- 口腔病学会雑誌
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口腔病学会雑誌 56 (2), 381-392, 1989
口腔病学会
