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- 山田 恵子
- 東北大学歯学部小児歯科学講座
書誌事項
- タイトル別名
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- Study on Cariess Prevention by Laser Irradiation in Pediatric Dentistry
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抄録
The purposes of this study were to determine the suitableenergy dentisty of laser irradiation afforded the acid resistance on the enamel surface in situ and to investigate the change of temperature in the pulp chamber at the time of exposure to a laser on the enamel surface and the depth of acid resistant enamel obtained after lasing in vitro.<BR>Extracted deciduous teeth and young premolars were used as materials.<BR>The type of laser was acousto-optically Q switched Nd: YAG laser with an optical fiber. The irradiation was performed at an average output of 10 W with a pulse width of 120 nsec, repitition rate of 1kHz, spot size of 3.0-3.4 mm and various duration times. The results were as follows.<BR>(1) The dissolution of the enamel surface which was put into a lactic acid solution was not noticed with a scanning electron microscope when irradiated at the energy density of more than 37.5 J/cm2 on deciduous teeth and more than 62.5 J/cm2 on young premolars.<BR>(2) The rise in the temperature in pulp chamber after lasing was observed with increase in the energy density and it was 4-5°C when the reasonable energy density was used to obtain the acid resistant enamel.<BR>(3) The depth of enamel which obtained the acid resistace after lasing at the energy density of 65J/cm2 was deeper than 80μm from the enamel surface.
収録刊行物
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- The Japanese Journal of Pediatric Dentistry
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The Japanese Journal of Pediatric Dentistry 23 (3), 575-591, 1985
The Japanese Society of Pediatric Dentistry