title: Bacteriology of deep-seated carious lesions.
abstract: In a study of the deep carious lesions in forty extracted permanent teeth, 50% of the lesions showed the clinically hard layer to be sterile. The number of sterile cases in the 18 to 24-year age group is three times the number in the 25 to 35-year age group.
mesh_terms: D000293:Adolescent; D000328:Adult; D001419:Bacteria / Q000166:cytology* / Q000302:isolation & purification; D003731:Dental Caries / Q000382:microbiology* / Q000473:pathology; D003804:Dentin / Q000382:microbiology; D006801:Humans; D013291:Streptococcus / Q000302:isolation & purification