Influence of pH on the suspension stability of some oral bacteria

Authors

  • Thomas Simonsson Departments of Oral Microbiology and Prosthetic Dentistry, School of Dentistry, Malmö, Sweden; Department of Cariology, Faculty of Odontology, University of Gothenburg, Gothenburg, Sweden
  • Per- Olof Glantz Departments of Oral Microbiology and Prosthetic Dentistry, School of Dentistry, Malmö, Sweden; Department of Cariology, Faculty of Odontology, University of Gothenburg, Gothenburg, Sweden
  • Stig Edwardsson Departments of Oral Microbiology and Prosthetic Dentistry, School of Dentistry, Malmö, Sweden; Department of Cariology, Faculty of Odontology, University of Gothenburg, Gothenburg, Sweden
  • Jan Olsson Departments of Oral Microbiology and Prosthetic Dentistry, School of Dentistry, Malmö, Sweden; Department of Cariology, Faculty of Odontology, University of Gothenburg, Gothenburg, Sweden

DOI:

https://doi.org/10.3109/00016358809004764

Keywords:

Bacteria, oral, colloidal stability, electrophoretic mobility, flocculation

Abstract

The purpose of the present study was to investigate the suspension stability of some oral bacteria at some clinically relevant pH levels. Through determinations of the electrophoretic mobility and sedimentation behavior at pH 5, 6, and 7, it was shown that within this pH range estimations of both the [-potentials and colloidal stability were pH-dependent for the bacteria and bacterial suspensions tested. The observations are in line with the DLVO theory for lyophobic sols and indicate that bacteria behave like colloidal particles when suspended in certain media. The colloidal behavior further seemed to vary in relation to bacterial species and strains.

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Published

1988-01-01

Issue

Vol. 46 No. 3 (1988): Acta Odontologica Scandinavica

Section

Articles