title: [Problem solving in endodontic diseases: II. Chronic injury diseases of tooth hard tissue].
authors: zzzyancn@sohu.com
authors: Yan
authors: Y
authors: Zeng
authors: Jia-De
authors: JD
authors: Wang
mesh_terms: D002908:Chronic Disease; D006801:Humans; D014076:Tooth Diseases; D018677:Tooth Injuries