Looking into the tooth and its surfaces with ultrasonics.
D003731:Dental Caries / Q000175:diagnosis; D003743:Dental Enamel; D003782:Dental Pulp / Q000033:anatomy & histology; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D003945:Diagnosis, Oral; D006801:Humans; D014070:Tooth / Q000033:anatomy & histology*; D014159:Transducers; D014465:Ultrasonics; D014463:Ultrasonography