Related Experiment Video
Updated: Aug 15, 2026
In Vitro Evaluation of The Effects Of Er,Cr:YSGG and Diode Lasers Used on Titanium Cylinder
Published on: June 6, 2025
Detection of incipient carious lesions formed on human teeth in vitro using ultraviolet laser
Keun-Bae Song1, Youn-Hee Choi, Seong-Hwa Jeong
1Department of Preventive Dentistry, School of Dentistry, Kyungpook National University, Daegu, South Korea.
Objective:
A 325-nm ultraviolet (UV) laser was tested for effectiveness in the detection of incipient carious lesions on teeth.
Background Data:
The combination of early detection with new intervention methods and caries management will be the preferred dentistry of the future.
Methods:
Carious lesions from extracted teeth or from demineralized teeth were irradiated by UV laser, and the fluorescence spectrum was measured. The peak ratio between two peak intensities in the spectrum was determined.
Results:
Fluorescence peak intensity of approximately 425 nm was gradually decreased as carious lesions formed, whereas the change 625 nm was less significant. The peak ratio change between peak intensities of approximately 425 and at 625 nm was observed after 30 min of demineralization. Morphological changes were barely observable in this range.
Conclusions:
A 325-nm UV laser showed high efficacy in the detection of incipient carious lesions. By evaluating peak ratio, the incipient carious lesions could be detected.
