Effect of iron on acid demineralisation of bovine enamel blocks by a soft drink

• Published in: Archives of oral biology Vol. 52; no. 11; pp. 1109 - 1111
• Main Authors: Kato, Melissa Thiemi, de Carvalho Sales-Peres, Sílvia Helena, Buzalaf, Marília Afonso Rabelo
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.11.2007
• Subjects: Acids - adverse effects; Advanced Basic Science; Animals; Carbonated Beverages - adverse effects; Cariostatic Agents - pharmacology; Cattle; Demineralisation; Dental enamel; Dental Enamel - drug effects; Dental Enamel Solubility - drug effects; Dental wear; Dentistry; Fluorides; Hardness; Iron; Iron - pharmacology; Models, Animal; Saliva, Artificial; Soft drinks; Tooth Demineralization - metabolism; Tooth Demineralization - prevention & control; Tooth erosion; Iron; Dental enamel; Demineralisation; Dental wear; Tooth erosion; Soft drinks
• ISSN: 0003-9969; 1879-1506
• DOI: 10.1016/j.archoralbio.2007.04.012

Abstract Objectives The aim of this study was to evaluate, in vitro , the effect of iron on the acid demineralisation of bovine enamel blocks by a soft drink. Design Twenty-four blocks of bovine enamel were randomly assigned to two groups (experimental and control), which were exposed to 4 cycles of demineralisation in Coke® containing or not 10 mmol/L of iron, respectively, and another 4 cycles of remineralisation in artificial saliva. The softening of enamel was evaluated by % superficial microhardness change (SMHC) and wear analysis. Data were analysed using t -test ( p < 0.05). Results With regard to %SMHC, the experimental group presented average values (±S.E.) of −85.3 ± 0.9, that were significantly higher ( t = 4.7, p < 0.01) than the ones observed for control group (−76.7 ± 1.6). The experimental group presented a mean wear (±S.E.) of 2.3 ± 0.2 μm, that was significantly lesser ( t = 3.7, p < 0.01) than the one observed for the control group (3.5 ± 0.2 μm). Conclusions According to this protocol, iron at 10 mmol/L significantly reduced the wear, but significantly enhanced the %SMHC of enamel blocks submitted to erosion by Coke®.