title: What apex does the sono-explorer really read?
mesh_terms: D000328:Adult; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D004708:Endodontics / Q000295:instrumentation*; D006801:Humans; D008875:Middle Aged; D009811:Odontometry / Q000295:instrumentation; D013016:Sound; D014092:Tooth Root / Q000033:anatomy & histology*