The present study was conducted to examine the incidence and location of filled surfaces from 10-18 years of age in individuals subjected to and not subjected to treatment with fixed orthodontic appliances. Each group comprised 65 individuals. About 5 years had elapsed since the appliances were removed. No statistically significant difference in filled surfaces was found between the groups at age 10 to 18. The incidence in filled surfaces from 10-18 years was 6.34 in the orthodontic group, and 7.22 in the untreated group. The difference was not statistically significant. The distribution of fillings in the dentition in the two groups showed no significant differences. Most of the fillings were recorded in the fissures of the molars. In the first molars most of the fillings in the fissures were already present at the age of 10. It was concluded that in individuals with relatively low caries activity, the present fluoride regimes are sufficient to prevent any excess caries lesion development requiring filling during or after orthodontic therapy.