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Proceedings Paper

Experimental and mechanism investigation on caries prevention by Nd:YAG laser
Author(s): Li Liu; Zheng-jia Li
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Paper Abstract

The aim is to study the effectiveness of continuous Nd:YAG laser inhibiting caries progression of human enamel. After surface polishing, enamel blocks irradiated by different power laser and control group were put into 5ml of lactate buffer solution (0.1mol/L), which was in water of 37°C for 72 hours. The microhardness and morphology of enamel surface were investigated by microhardness tester and scanning electron microscopy. Compared with control, the group with 0.3W laser treatment has the least caries lesion (p<0.001). At the same time, the mechanism of caries prevention and acid resistance by laser was discussed in detail. We drew a conclusion that the change of contents in enamel and crystal orientations and partial decomposition of the organic matrix might be the main reason for enhancing the acid resistance ability of enamel. And best caries inhibition could be achieved when the temperature rising of enamel surface was in the range of 300~400°C by laser parameters being controlled suitably.

Paper Details

Date Published: 13 October 2005
PDF: 7 pages
Proc. SPIE 5969, Photonic Applications in Biosensing and Imaging, 596921 (13 October 2005); doi: 10.1117/12.629829
Show Author Affiliations
Li Liu, Wuhan Univ. of Science and Engineering (China)
Zheng-jia Li, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5969:
Photonic Applications in Biosensing and Imaging
Brian C. Wilson; Richard I. Hornsey; Warren C. W. Chan; Ulrich J. Krull; Robert A. Weersink; Kui Yu, Editor(s)

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