title: [Problem solving in endodontic diseases: VIII. Biological characteristics and clinical significance of root canal apex].
authors.forename: Cheng-Fei
authors.initials: CF
authors.lastname: Zhang
mesh_terms: D003251:Constriction, Pathologic; D006801:Humans; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000379:methods*; D019227:Tooth Apex / Q000033:anatomy & histology / Q000473:pathology; D014076:Tooth Diseases / Q000473:pathology / Q000628:therapy*