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Journal of Dental Research
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Interactive Forces between Co-aggregating and Non-co-aggregating Oral Bacterial Pairs

F. Postollec1, W. Norde1,2, J. de Vries1, H.J. Busscher1 and H.C. van der Mei1,*

1 Department of Biomedical Engineering, University Medical Center Groningen, and University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands; and
2 Laboratory of Physical Chemistry and Colloid Science, Wageningen University, PO Box 8038, 6700 EK Wageningen, The Netherlands


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  		Figure 1. Micrographs of bacteria immobilized on a tipless cantilever and a poly-L-lysine-coated glass surface, together with a schematic presentation of the force-distance curves recorded by AFM. (a) Scanning electron micrograph of the tipless cantilever with immobilized actinomyces (upper panel) and light micrograph of a glass surface with an immobilized streptococcal partner (lower panel). The bars used are 5 µm. (b)finally broken and interaction is no longer detected.

 

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  		Figure 2. Examples of force-distance curves at 10°C, 22°C, and 40°C between A. naeslundii 147 and streptococci, including approach (upper line) and retracting (lower line) curves. (left panel) Co-aggregating pair, involving S. oralis J22. (right panel) Non-co-aggregating pair, involving S. sanguis PK1889.

 

Journal of Dental Research, Vol. 85, No. 3, 231-234 (2006)
DOI: 10.1177/154405910608500305
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