Deciduous molar hypomineralization and the country of birth of the mother play a role in the prevalence of dental caries. These aetiological factors associated with childhood dental caries need to be investigated further in longitudinal clinical trials.

DMFT, dental plaque, gingival bleeding and periodontal indices did not change remarkably after two years, comparing dialysis and renal transplant patients. Renal transplantation enhances salivary flow and decreases symptoms of xerostomia and thirst, and hence enhances the potential to improve the quality of life of affected individuals.

The results suggest that the periodontal health of Dutch adults aged 25-54 years has improved since 1983.

The aim of this study was to determine, for different age groups, the additional value of bite–wing radiographs compared to the clinical information, and to calculate the subsequent effect on the DMFS index. Subjects were 14, 17, 20, 23 years old, or in the age groups 25–34 and 35–54, who participated in a clinical epidemiological survey. After obtaining consent, bite–wings were taken of approximately 25% of the participants (n = 663). The extra diagnostic yield of the bite–wings varied between 163 and 700% for approximal dentine caries diagnosis of untreated surfaces, and between 233 and 593% for inadequate restoration judgement for filled surfaces. The DS score went up by about 20–98%, whereas the DMFS index increased between 1 and 12%, resulting in a radiographic correction factor of 1.01–1.12. In conclusion, the considerable increase in the prevalence of approximal dentinal lesions and inadequate restorations for all age groups results in higher numbers of surfaces in need of treatment, but is not accompanied by a significant increase in DMFS scores.