Hypomineralized second primary molars: prevalence data in Dutch 5-year-olds

The aim of this cross-sectional observational study was to
report on the prevalence of hypomineralizations in second
primary molars in 5-year-old Dutch children. In the study 386
(45% girls) 5-year-old Dutch children, all insured by a Health
Insurance Fund, participated. Scoring criteria for molar incisor
hypomineralization molars were adapted to score second
primary molars. The prevalence of hypomineralized
second primary molars (HSPM) was 4.9% at child level and
3.6% at tooth level. Most HSPMs (87%) showed demarcated
opacities, followed by posteruptive enamel loss (40%).