title: [Adhesion of oral microorganisms on dental porcelain polished and glazed].
abstract: OBJECTIVE
  This study compared the roughness of porcelain polished or glazed surfaces and the adhesion of oral streptococcus mutans to them in vitro.
  
  
  METHODS
  30 porcelain samples were made. Porcelain samples in group A were polished with diamond paste. Porcelain samples were glazed in group B and were polished with Al2O3 (240#) bur in group C. Their roughness values were measured by profilometer. Standardized cell suspensions were incubated with test samples for one hour at 37 degrees C, then retained cells were counted by image analysis (percentage area of a microscopic field covered by cells).
  
  
  RESULTS
  Roughness values of group A, B, C were respectively (0.1987 +/- 0.057) microm, (0.1990 +/- 0.091) microm, (0.4260 +/- 0.174) microm. There was no significantly difference between group A and group B. The roughness samples in group C were significantly rougher than that in the other groups. The amount of retained cells in group A, group B, group C was respectively (15.92 +/- 4.37)%, (16.39 +/- 6.31)% and (41.48 +/- 12.1)%. There was no significant difference between the cell adhesion on porcelain surface glazed and polished, but more bacteria adhered on the porcelain surface in group C.
  
  
  CONCLUSIONS
  Porcelain surface polished treatment was clinically acceptable compared with its glazed. They all exhibited the least amount of bacteria adhesion. The more porcelain surface was rough, the more bacteria adhered on it.
authors.affiliation: Department of Prosthodontics, School of Stomatology, Wuhan University, Wuhan 430079, China.
authors.forename: Yi-ning
authors.initials: YN
authors.lastname: Wang
authors.forename: Guo-jiang
authors.initials: GJ
authors.lastname: Wen
authors.forename: Bin
authors.initials: B
authors.lastname: Shi
authors.forename: Xin-hua
authors.initials: XH
authors.lastname: Pan
mesh_terms: D001422:Bacterial Adhesion; D003775:Dental Polishing; D003776:Dental Porcelain; D006801:Humans; D013295:Streptococcus mutans / Q000502:physiology*; D014070:Tooth / Q000382:microbiology*
chemical_list: D003776:Dental Porcelain