An automated digital microradiography system for assessing tooth demineralization

Cynthia L. Darling; Charles Q. Le; John D. B. Featherstone; Daniel Fried

doi:10.1117/12.816868

18 February 2009 An automated digital microradiography system for assessing tooth demineralization

Cynthia L. Darling, Charles Q. Le, John D. B. Featherstone, Daniel Fried

Proceedings Volume 7162, Lasers in Dentistry XV; 71620T (2009) https://doi.org/10.1117/12.816868
Event: SPIE BiOS, 2009, San Jose, California, United States

Abstract

Digital Transverse microradiography (TMR) offers several advantages over film based methods including real-time image acquisition, excellent linearity with exposure, and it does not require expensive specialized film. The purpose of this work was to demonstrate that a high-resolution digital microradiography system can be used to measure the volume percent mineral loss for sound and demineralized enamel and dentin thin sections from 150-350-µm in thickness. A custom fabricated digital microradiography system with ~ 2-µm spatial resolution consisting of a digital x-ray imaging camera, a computerized high-speed motion control system and a high-intensity copper Kα x-ray source was used to determine the volume percent mineral content of sound and demineralized tooth sections. The volume percent mineral loss was compared with cross-sectional microhardness measurements on sound extracted human teeth. The correlation between microhardness and microradiography was excellent (Pr=0.99) for section thickness ranging from 59-319-µm (n=11). The attenuation was linear with varying exposure time from 1-10 seconds. Digital TMR is an effective and rapid method for the assessment of the mineral content of enamel and dentin thin sections.

Citation Download Citation

Cynthia L. Darling, Charles Q. Le, John D. B. Featherstone, and Daniel Fried "An automated digital microradiography system for assessing tooth demineralization", Proc. SPIE 7162, Lasers in Dentistry XV, 71620T (18 February 2009); https://doi.org/10.1117/12.816868

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