title: [Effect of Galla chinensis on the surface strengthening of bovine dentine in vitro].
abstract: OBJECTIVE
  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.affiliation: Sichuan University, Chengdu, Sichuan Province, China. dmdentist@163.com
authors.forename: Meng
authors.initials: M
authors.lastname: Deng
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: Xiao-li
authors.initials: XL
authors.lastname: Dong
authors.forename: Ju-hong
authors.initials: JH
authors.lastname: Shi
mesh_terms: D000818:Animals; D002417:Cattle; D003731:Dental Caries; D003743:Dental Enamel; D003804:Dentin; D004365:Drugs, Chinese Herbal; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties
chemical_list: D004365:Drugs, Chinese Herbal