Monitoring changes intooth structures and early diagnosis of carious lesions require quantitative imaging techniques. A chalky white spot on the tooth’s surface indicates enamel demineralization, early stage of thecarious lesion. Many advanced imaging modalities for identifying tooth tissuesimagehave been created, including magnetic resonance imaging(MRI), X-ray Computed Tomography, Positron Emission Tomography (PET), ultrasound, Single Photon Emission Computed Tomography (SPECT), and the most recent, Optical Coherence Tomography (OCT). In obtaining image information, some modalities use high dosesof radiation and energy that might harmpatient’s health. Most early commercial OCTs had limitations,such as bulkysizeandlow image resolution. To address the issues, this study proposes a dual mode tomography technique by combining OCT and ultrasound systemusing COMSOLMultiphysics software.Both methods offered non-invasive, non-ionizing, economical, and painless imaging techniques.The application of ultrasound system will help to overcome the OCT’s limitation to detect the penetration depth of caries lesion. Several simulations were performed to analyze the light and ultrasonic propagated waves which penetrate through the incisor teeth. In response to this goal, images of incisor teeth were created in silico with a high spatial resolution. As a result, the combination of OCT and ultrasound may offer the best approach for displaying and examiningchanges inthe oral cavity.

Dental diagnostic imaging plays a significant role in the field of dentistry. In the oral environment, continuous demineralization and remineralization of tooth structure is common. Early diagnosis and monitoring of carious lesions are essential, and enamel abnormalities require quantitative imaging techniques. Among the imaging modalities available are radiography, X-ray computed tomography, and magnetic resonance imaging. However, to obtain imaging information on dental diagnostics, most of these systems rely on specific radiation and energy which might be harmful to health. To overcome the aforementioned problem, this research proposes a conceptual modeling of ultrasonic tomography system to detect enamel abnormalities using simulation from COMSOL software. Ultrasonic tomography can be obtained by the presence of acoustic waves transmitted from a source and the reflection of the waves at the investigated area. The transmissiontechnique yielded 0.0041260 V for 7 MHz and 0.0003841 V for 25 MHz, but the reflection method yielded 0.000060 V for 7 MHz and 0.000211 V for 25 MHz. The transmissionapproach produces the greatest difference in voltage when compared to the reflectionmethod. This suggests that, in comparison to the reflectiontechnique, the transmissionmethod is significantly better at detecting changes on the tooth surface.