PURPOSE: To evaluate the effect of Galla chinensis extract (GCE) on strengthening the surface properties of bovine dentine in vitro. METHODS: Forty-five bovine dentine blocks were prepared and randomly divided into three groups to undergo a modified anti-acid pH-cycling regimen. Treatments were 4 g/L aqueous solution of Galla chinensis, 1 g/L NaF(positive control) and distilled deionized water (DDW, negative control). Surface dentine microhardness was assessed before and after the pH-cycling regimen and the percentage of microhardness loss (PML) was calculated. Then specimens were analyzed with scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDXS). Statistical analysis was performed by SPSS17.0 software package. RESULTS: Compared with DDW, GCE significantly reduced dentinal microhardness loss (P<0.05). No significant difference of the PML was found between GCE and NaF groups (P>0.05). Both SEM images and elemental contents were similar between the GCE and NaF group. CONCLUSIONS: Galla chinensis can enhance the surface properties of bovine dentine and may inhibit dentine caries progression and protect tooth dentine from erosion in this laboratory study.
PURPOSE: To evaluate the effect of Galla chinensis extract (GCE) on strengthening the surface properties of bovine dentine in vitro. METHODS: Forty-five bovine dentine blocks were prepared and randomly divided into three groups to undergo a modified anti-acid pH-cycling regimen. Treatments were 4 g/L aqueous solution of Galla chinensis, 1 g/L NaF(positive control) and distilled deionized water (DDW, negative control). Surface dentine microhardness was assessed before and after the pH-cycling regimen and the percentage of microhardness loss (PML) was calculated. Then specimens were analyzed with scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDXS). Statistical analysis was performed by SPSS17.0 software package. RESULTS: Compared with DDW, GCE significantly reduced dentinal microhardness loss (P<0.05). No significant difference of the PML was found between GCE and NaF groups (P>0.05). Both SEM images and elemental contents were similar between the GCE and NaF group. CONCLUSIONS: Galla chinensis can enhance the surface properties of bovine dentine and may inhibit dentine caries progression and protect tooth dentine from erosion in this laboratory study.
Authors: Xuelian Huang; Meng Deng; Mingdong Liu; Lei Cheng; R A M Exterkate; Jiyao Li; Xuedong Zhou; Jacob M Ten Cate Journal: Open Dent J Date: 2017-08-31