title: Penetration of the maxillary sinus by overextended gutta percha cones. Report of two cases.
mesh_terms: D000328:Adult; D005260:Female; D006171:Gutta-Percha / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000293:injuries*; D012390:Root Canal Therapy / Q000009:adverse effects*; D012852:Sinusitis / Q000209:etiology
chemical_list: D006171:Gutta-Percha