IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-10-37341 Original Research Paper PHOTOACOUSTIC IMAGING TOMOGRAPHY - A NOVEL NON-INVASIVE TECHNIQUE FOR MONITORING PERIODONTAL HEALTH Nupur Sah Dr. Dr. Priyanka Jain Dr. October 2021 10 10 01 02