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The European Journal of Orthodontics 1987 9(1):109-116; doi:10.1093/ejo/9.1.109
© 1987 by European Orthodontic Society
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Streptococcus mutans and lactobacilli frequency in orthodontic patients; the effect of chlorhexidine treatments

Fredrik Lundström*, and Bo Krasse**

*Linkoping
**Goteborg, Sweden

Dr F. Lundström Department of Orthodontics Tandvårdscentralen S-581 01 Linköping, Sweden

Patients with malocclusions often have a large number of retention sites for plaque. This study describes the levels of caries-inducing Streptococcus mutans and lactobacilli in the saliva of 138 orthodontic patients prior to treatment. It was found that the number of micro-organisms did not differ from that given for a general population of corresponding ages. After insertion of fixed orthodontic appliances, the levels of both species were found to have increased, despite a pre-treatment oral hygiene education and training.

Chlorhexidine treatments significantly reduced the number of S. mutans, both prior to and during the orthodontic treatment period. As a rapid recolonization took place in many subjects, the effect of the treatment needs to be monitored by repeated microbiological sampling procedures. No effect on numbers of lactobacilli could be demonstrated.


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