Incidence of periapical cysts in relation to the root canal.
D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000502:physiology; D006801:Humans; D066298:In Vitro Techniques; D011842:Radicular Cyst / Q000453:epidemiology* / Q000473:pathology; D014092:Tooth Root / Q000033:anatomy & histology* / Q000502:physiology