J. Orthod.
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British Journal of Orthodontics, Vol 21, 125-132, Copyright © 1994 by British Orthodontic Society

REVIEW ARTICLES

Microbial growth on the surfaces of various orthodontic bonding cements

RE Blunden, RG Oliver and CO O'Kane
Department of Child Dental Health, Dental School, Health, Cardiff.

An experimental technique was developed to examine the adhesion of a strain of Streptococcus mutans to the surface of discs of selected orthodontic bonding composites and a glass ionomer cement. Colonization by the bacterium was assessed by weight gain and scanning electron microscopy. Initial colonization occurred after about 3 days, and the specimens were usually completely covered by the fourth day. There were statistically significant differences between materials for weight gain, a strong correlation between weight gain and surface free energy of the materials measured as droplet contact angle (r = 0.9) and a moderate correlation between weight gain and surface roughness (r = 0.6).


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M. Y. H. Chin, H. J. Busscher, R. Evans, J. Noar, and J. Pratten
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Copyright © 1994 British Orthodontic Society.