title: [Pathological study of sinus tracts from chronic apical peridontitis].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003751:Dental Fistula / Q000150:complications / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010485:Periapical Periodontitis / Q000150:complications / Q000473:pathology*