Original scientific paper
Influence of Dentifrices pH on Enamel Microhardness In Vitro
Kristina Goršeta
orcid.org/0000-0001-6397-4126
; Department of Paediatric and Preventive Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Vesna Ambarkova
orcid.org/0000-0002-5015-1515
; Department of Paediatric and Preventive Dentistry, Faculty of Dentistry, Ss. Cyril and Methodius University, Skopje, R. Macedonia
Tomislav Škrinjarić
; Department of Paediatric and Preventive Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Domagoj Glavina
; Department of Paediatric and Preventive Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
Purpose was to evaluate the effect of toothpastes pH on enamel remineralization. Twenty eight enamel slabs were polished with water-cooled SiC discs (320, 600 and 1200 grit). The specimens were divided into seven groups and subjected to a daily cycling regimen with brushing treatments, demineralization and remineralization in artificial saliva. The surface microhardness (SMH) was calculated from the mean values obtained from six indentations (Vickers hardness number (VHN)) on the enamel surface at baseline and after 12 days. pH of the dentifrices was determined in a slurry with deionized water (1:3). Changes of the enamel surface microhardness at baseline and after remineralization stage were measured and analyzed using the Student t-test and one-way ANOVA. All groups treated with fluorides showed higher SMH values compared to control group. Toothpastes with lower pH (Pronamel, Sensodyne F, Sensodyne Rapid) were statistically superior to other fluoride dentifrices and control group after 12 days pH-cycling regimen (p<0.001). Obtained results showed that slightly acidified fluoridated toothpastes may have a positive influence on enamel remineralization process.
Keywords
enamel; fluoride; remineralization; microhardness
Hrčak ID:
166088
URI
Publication date:
16.9.2015.
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