The Incremental Effect of Acid Resistance and Remineralization on Incipient Caries of Enamel with Laser Irradiation

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The author has demonstrated that a normal pulsed Nd-YAG Iaser was the most suitable among the lasers to produce resistance against acid decalcification of human tooth enamel, and a combined treatment of laser irradiation and fluoride application onto the enamel obtained most remarkable acid resistance. Artificial caries-like lesions were made on human enamel, and the enamel was then treated with laser irradiation and acidulated phosphate fluoride (APF). The laser used in this study was a normal pulsed Nd-YAG laser which has a 0.3msec with a pulse energy of 0.2 J/pulse. The tooth enamel was lased at a repetition rate of 20pps with a total energy density of 40J/cm^2. Remineralization of the enamel was measured by microradiographic technique and microhardness test. The following results were obtained : 1 ) An increment in acid resistance of enamel was caused by laser irradiation alone and also by fluride treatment following laser irradiation. 2 ) Remineralization was remarkable in the cases of laser irradiation and fluoride treatment after laser irradiation groups. The extent of remineralization was visible from the surface to the bottom of the lesion area.
大垣女子短期大学の論文
1995-03-15