Modern computed tomography, cone-beam computed tomography, magnetic resonance imaging, nuclear medicine, ultrasonography (USG), xeroradiography, and arthrography are only a few of the advanced diagnostic imaging modalities used in oral and maxillofacial radiology. Since its inception, USG has been employed in the realm of medicine for both diagnostic and therapeutic purposes in order to identify lesions. Using sound waves instead of ionising radiation, USG is a method that acquires images in real time. Compared to hard-tissue lesions, soft-tissue lesions are easier to diagnose with USG. In this article, the uses of ultrasonic imaging in dentistry are reviewed.