title: Cross-sectional microhardness of human enamel subjected to erosive, cariogenic or combined erosive/cariogenic challenges.
abstract: This in situ study evaluated the interaction between caries and erosion processes. In the first phase, enamel specimens were subjected to erosion without dental plaque (EO) or to erosion with plaque (EP); in the second phase, they were subjected to erosion plus cariogenic challenge (EC) or cariogenic challenge (CO), both with plaque accumulation. Cross-sectional hardness data (10-330 microm depth) were tested using ANOVA (alpha = 0.05). EO and EP showed surface softening to 10 microm depth. CO and EC produced subsurface lesions, of similar depth (up to 220 microm), with CO showing higher integrated loss of hardness than EC, indicating that cariogenic and erosive challenges did not have an additive effect.
authors.affiliation: Department of Pediatric Dentistry, Alfenas Federal University, Alfenas, Brazil. heitorhonorio @ yahoo.com.br
authors.forename: H M
authors.initials: HM
authors.lastname: Honório
authors.forename: D
authors.initials: D
authors.lastname: Rios
authors.forename: C F
authors.initials: CF
authors.lastname: Santos
authors.forename: A C
authors.initials: AC
authors.lastname: Magalhães
authors.forename: A C B
authors.initials: AC
authors.lastname: Delbem
authors.forename: M A R
authors.initials: MA
authors.lastname: Buzalaf
authors.forename: M A A M
authors.initials: MA
authors.lastname: Machado
mesh_terms: D000328:Adult; D019412:Anatomy, Cross-Sectional; D002253:Carbonated Beverages / Q000009:adverse effects; D002326:Cariogenic Agents / Q000009:adverse effects; D003731:Dental Caries / Q000473:pathology* / Q000503:physiopathology; D003743:Dental Enamel / Q000648:ultrastructure*; D003773:Dental Plaque / Q000473:pathology / Q000503:physiopathology; D005260:Female; D006244:Hardness; D006801:Humans; D008297:Male; D008859:Microscopy, Polarization; D013395:Sucrose / Q000009:adverse effects; D017001:Tooth Demineralization / Q000473:pathology / Q000503:physiopathology; D014077:Tooth Erosion / Q000473:pathology* / Q000503:physiopathology; D055815:Young Adult
chemical_list: D002326:Cariogenic Agents; D013395:Sucrose