RT Journal Article T1 Prevalence and clinical presentation of molar incisor hypomineralisation among a population of children in the community of Madrid A1 Ortega Luengo, Sara A1 Feijoo García, Gonzalo A1 Gallardo López, Nuria Esther A1 Caleya Zambrano, Antonia María A1 Miegimolle Herrero, Mónica AB Objective The main objective of this study was to estimate the prevalence of molar incisor hypomineralisation (MIH), an alteration of tooth enamel with an estimated worldwide prevalence rate of 14%, among children using primary care services in the Community of Madrid, Spain.Materials and methods This was a descriptive, cross-sectional and multicentre study. After calibrating all researchers and following the diagnostic criteria of the European Academy of Paediatric Dentistry (EAPD), children aged between8 and 16 years who were users of the dental services at 8 primary oral health units of the Madrid Health Service (SERMAS) were included. The children underwent a dental examination, and the parents were asked to complete a questionnaire.Results The prevalence of MIH was 28.63% (CI: 24.61–32.65%). The age cohorts most affected by MIH were 8 years (21.4%) and 11 years (20.7%). The presence of MIH was greater among girls (85; 60.71%) than among boys (55; 39.28%). The mean number of affected teeth per patient was 4.46 ± 2.8. The most frequently affected molar was the upper right first molar (74.3%), and the upper left central incisor was the most affected incisor (37.85%). Opacities were the defects most frequently recorded (63.57%).Conclusions The prevalence of MIH in this study is the highest of all relevant studies conducted in Spain. PB BMC SN 1472-6831 YR 2024 FD 2024-02-13 LK https://hdl.handle.net/20.500.14352/109380 UL https://hdl.handle.net/20.500.14352/109380 LA eng NO Ortega-Luengo S, Feijóo-Garcia G, Miegimolle-Herrero M, Gallardo-López NE, Caleya-Zambrano AM. Prevalence and clinical presentation of molar incisor hypomineralisation among a population of children in the community of Madrid. BMC Oral Health. 2024 Feb 13;24(1):229.- NO Foundation for Biosanitary Research and Innovation in Primary Care (FIIBAP)”. DS Docta Complutense RD 6 abr 2025