A 3-year experimental toothbrushing study was conducted in a natural fluoride area in Denmark to evaluate the anti-caries effect of a 2% sodium monofluorophosphate dentifrice. In a previous report the results for the total population of 1,407 schoolchildren, representing a broad age-span (7-12 years), at the commencement of the study in 1970 were given. In the present report results are presented for two subpopulations of "8-year-olds" and "11-year-olds" at the commencement of the study. Differential analysis of the effect of the test dentifrice on defined types of surfaces for the two subpopulations is given. The evaluation was performed using both the conventional DMF-indices and the recently published ECSI-Index6. The evaluation showed that the test dentifrice had a valuable anti-caries effect in both age groups, above and beyond the effect of the waterborne fluoride. Proximal surfaces were affected most baneficially by the active agent both in relative and absolute terms. However, an appreciable caries-preventive effect was also found on the "pit and fissure" surfaces.
The Danish oral health care services for children began its development at the beginning of this century. The aims and main principles of the service were formulated in the 1960s and in 1971 the Danish Parliament passed the Act on the Children's Oral Health Care System. By 1987 a complete oral health care service as a decentralized public health enterprise will be fully established covering all Danish children from 0 to 16 years of age. The oral health care programme is founded on health education and prevention. Treatment services are considered to be a safety net for disease not yet prevented. The oral health care service for children is described in detail and future developments are discussed.
A 1-year study of the isolated effect of an intensive motivation program aimed at improving the oral health status of 11-13-year-old schoolchildren was conducted in a Danish provincial town where all children have access to a free and comprehensive school oral health program. The effect was negligible as measured by epidemiologic indices.
The Danish oral health care delivery system is a publicly funded, predominantly school based system of care for children and adolescents and a private practice copayment national health insurance mode for adults. Study of this dualistic system can provide useful information to dental public health practitioners. Interviews with experts in the Danish oral health care system and a selected review of the literature demonstrate that improvement trends are occurring in the oral health status of both adults and children. These improvement trends can be directly related to a combination of treatment and preventive measures undertaken by the country as a whole, and to specific interventions for certain subpopulation groups, such as preschoolers. Four key variables can be defined which have contributed to the success of the Danish oral health care delivery system (DOHCDS). These include 1) the role of private sector input into the development of the DOHCDS, 2) demography, 3) the Danish value system, and 4) the structure of the DOHCDS.
The bitewing radiographs of 1,731 English and Danish schoolchildren aged 13--15 years were examined to assess the prevalence of chronic periodontitis. Only one child (0.06%) was found to be affected in comparison with the high prevalence of 51.5% reported by Hull et al. (1975). Minute qualitative changes in the radiographic appearance of the alveolar crest, or changes in the visual representation of the width of the periodontal ligament space are not reliable or valid criteria for assessing chronic periodontitis. Horizontal bone loss observed on radiographs, which can be accurately measured using the cemento-enamel junction as a reference point, is a useful diagnostic criterion for the measurement of chronic periodontitis.