Schweregrade der Milchmolaren-Hypomineralisation und Molaren-Inzisiven- Hypomineralisation in Zahnarztpraxen

Abstract

Background: Deciduous molar hypomineralization (DMH) and molar-incisor hypomineralization (MIH) represent dental defects in primary and secondary dentition and have been diagnosed worldwide. The aim of this retrospective study was to evaluate pseudonymized DMH and MIH results of eight private pedodontists' practices in northern Germany.Methods: The investigators were calibrated before the study began. All subjects showed either signs of DMH, MIH, or both DMH and MIH. Incisors were only included if a molar was also affected. Hypomineralized lesions on hypomineralized second primary molars (HSPM) and MIH were classified according to Wetzel and Reckel (1991). Severity grade (SG) I clinically corresponded to individual cream to brown areas on occlusal surfaces/cusp tips with preserved tooth morphology, while SG III corresponded to large yellowish-brown areas over the entire tooth area with defects in crown morphology and severe enamel loss, coupled with high tooth sensitivity. The evaluation was primarily descriptive.Results: A total of 338 patients were examined. Gender was nearly equally distributed (male: n=170, 50.3 %; female: n=168, 49.7 %). The mean age was 7.1 (2.84) years (standard deviation [SD]) [range 3.0-18.0]. SG I was most common in both DMH (76.6 %) and MIH (76.7 %). SG III was observed most frequently on the occlusal surface in DMH (39.5 %) and MIH (34.9 %).Conclusion: The evaluation showed a low occurrence of SG III in permanent and deciduous teeth in patients with DMH and MIH. The second primary molar and first permanent molar showed the greatest severity of DMH and MIH. There was no correlation between DMH and MIH. In contrast, a statistically significant correlation between the number of affected tooth surfaces and the severity of the disease in DMH and MIH could be shown.Keywords: Deciduous molar hypomineralization, DMH, Molar-incisor hypomineralization, MIH, Severity