Prevalence of Molar-Incisor-Hypomineralisation among school children in four German cities.

BACKGROUND: A wide range for the prevalence of Molar-Incisor-Hypomineralisation (MIH) has been found in regional studies. AIM: The aim of this study was to determine the prevalence of MIH in Germany and to compare the findings with other studies. DESIGN: In the compulsory dental school examination, the first permanent molars, permanent incisors, and second primary molars were examined according to EAPD criteria in 2395 children (8.1 ± 0.8 years) in four regions in Germany for the presence of MIH. Examinations were performed by five calibrated examiners (κ = 0.9) on clean teeth after toothbrushing. RESULTS: The prevalence of MIH at the four regions differed considerably (4.3-14.6%) with a mean prevalence of 10.1%. The DMFT/dmft was generally low, but children with MIH exhibited statistically significant higher caries values. A total of 12.0% of the children with MIH also had at least one affected primary molar, which resulted in a statistically significant correlation between primary and permanent teeth. Most of the affected teeth had demarcated opacities, but more than half of the affected children showed at least one tooth with severe MIH. CONCLUSIONS: Molar-Incisor-Hypomineralisation is a prevalent finding in German school children. The prevalence varies highly in different regions, and the high rate of severe forms has clinically relevant implications.

Clinical applicability of resin infiltration for proximal caries.

OBJECTIVE: Resin infiltration is a new microinvasive treatment to arrest the progress of proximal initial caries lesions. This study evaluated the clinical applicability of proximal caries infiltration. METHOD AND MATERIALS: In the study population of 50 children, adolescents, and young adults (mean age, 17.3 ± 6.4 years), 10 dentists at the University of Greifswald, Greifswald, Germany, applied the infiltration material Icon on noncavitated proximal lesions in permanent and primary teeth as described by the manufacturer. The applicability was evaluated using two questionnaires filled out by clinicians and patients assessing the comfort, complexity, time, and difficulties of the application in comparison to a filling. RESULTS: The results showed good patient satisfaction with the procedure. The mean time for infiltration (24.3 ± 7.4 minutes), which included rubber dam application (7.7 ± 4 minutes) and the effort were perceived to be comparable to or even easier than a composite filling by clinicians. In three patients (6%), it was not possible to gain sufficient proximal space for the application of an infiltration. The location of the infiltrated tooth, separation problems, and the routine of clinicians with the infiltration technique had an effect on the duration of the infiltration. A clear learning curve with a reduction of treatment time for subsequent treatments was observed (P < .001). CONCLUSION: Resin infiltration of initial noncavitated proximal lesion showed good clinical applicability for clinicians and very high acceptance by patients.