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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 19 (2004), No. 6     15. Nov. 2004
Int J Oral Maxillofac Implants 19 (2004), No. 6  (15.11.2004)

Page 803-809


Attachment of Oral Gram-negative Anaerobic Rods to a Smooth Titanium Surface: An Electron Microscopy Study
Kuula, Heidi / Könönen, Eija / Lounatmaa, Kari / Konttinen, Yrjö T. / Könönen, Mauno
Purpose: Attachment of bacteria to titanium may differ not only between bacterial species but also between strains within a species. The aim of the present in vitro study was to examine differences in bacterial attachment using 4 gram-negative anaerobic species of bacteria that are considered potential periodontal pathogens.
Materials and Methods: The attachment of clinical and laboratory strains (n = 23) representing 2 Fusobacterium nucleatum subspecies, Porphyromonas gingivalis, and Prevotella intermedia to smooth, commercially pure titanium was examined using scanning electron microscopy.
Results: All bacterial strains were attached to the smooth titanium surface by their outer membrane. F nucleatum cells were poorly attached to the titanium, unlike P gingivalis or P intermedia cells, but only slight differences were observed in the quantity of attached cells between the strains within each bacterial group.
Discussion: In favorable conditions, some anaerobes can attach directly to an inert titanium surface. Microbial adhesion and subsequent colonization on the dental implant surface can lead to infecttion of the peri-implant tissue.
Conclusion: The results indicated that the avidity of bacterial attachment to a smooth titanium surface varies between species of oral gram-negative anaerobes but not between strains.