Early detection of dental caries, cracks and lesions is needed to prevent complicated root canal treatment and tooth
extraction procedures. Resolution of clinically used x-ray imaging is low, hence optical imaging techniques such as
optical coherence tomography, fluorescence imaging, and Raman imaging are widely experimented for imaging dental
structures. Photoacoustic effect is used in photon induced photoacoustic streaming technique to debride the root canal. In
this study, the extracted teeth were imaged using photoacoustic tomography system at 1064 nm. The degradation of
enamel and dentine is an indicator of onset of dental caries. Photoacoustic microscopy (PAM) was used to study the
tooth enamel. Images were acquired using acoustic resolution PAM system. This was done to identify microscopic
cracks and dental lesion at different anatomical sites (crown and cementum). The PAM tooth profile is an indicator of
calcium distribution which is essential for demineralization studies.
Vijitha Periyasamy, Mani Rangaraj, and Manojit Pramanik, "Photoacoustic imaging of teeth for dentine imaging and enamel characterization," Proc. SPIE 10473, Lasers in Dentistry XXIV, 1047309 (Presented at SPIE BiOS: January 28, 2018; Published: 8 February 2018); https://doi.org/10.1117/12.2286733.
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