Abstract
Between 1966 and 1979, the number of orthodontic treatments provided in the General Dental Service of the National Health Service in Scotland increased by approximately 14 per cent. The amount provided by specialists in practice increased from 10 to 43 per cent while that provided by general dental practitioners showed a reduction of 33 per cent. The total amount of orthodontic treatment provided each year has corresponded to approximately 2.5 per cent of the 10–14-year-old population, and the marked decline in the annual birth rate (onset 1965) is shown to have reduced the number of children at orthodontic risk by approximately 35, 000 between 1974–1979. This is the equivalent of 1700 treatments if a 5 per cent level of demand is assumed.

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