title: Is there a positive relationship between molar incisor hypomineralisations and the presence of dental caries?
abstract: OBJECTIVE
  This epidemiological study aimed to compare the caries experience in 10-year-olds with and without molar incisor hypomineralisation (MIH).
  
  
  METHODS
  About 693 children from an ongoing birth cohort study (GINIplus10) were examined for caries lesions to determine the DMF index. Furthermore, enamel hypomineralisation (EH) was scored on all permanent teeth/surfaces, according to the criteria of the European Academy of Paediatric Dentistry. Children with EH were categorised into those with a minimum of one EH in the permanent dentition (MIH/1), with EH on at least one-first permanent molar (MIH/1A), on at least one-first permanent molar and permanent incisor (MIH/1B), and on other permanent teeth (MIH/1C).
  
  
  RESULTS
  The mean caries experience was 0.4 (SD 0.9) DMFT. Existence of MIH/1, MIH/1A, MIH/1B, and MIH/1C was determined in 36.5%, 14.7%, 9.4%, and 21.8% of all children. The corresponding DMFT values were the following: no MIH: 0.3 (SD 0.8); MIH/1: 0.5 (SD 0.9); MIH/1A: 0.5 (SD 0.9); MIH/1B: 0.4 (SD 0.9); and MIH/1C: 0.4 (SD 0.9) DMFT. No significant differences were found between all groups.
  
  
  CONCLUSIONS
  There was no relationship between the presence of EH/MIH and caries in 10-year-olds. A ratio of one EH-associated defect to two caries lesions indicates that both conditions are prevalent and influence the oral health status of 10-year-old children from Munich, Germany.
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Munich, Germany. dheitm@dent.med.uni-muenchen.de
authors.forename: Daniela
authors.initials: D
authors.lastname: Heitmüller
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Thiering
authors.forename: Ute
authors.initials: U
authors.lastname: Hoffmann
authors.forename: Joachim
authors.initials: J
authors.lastname: Heinrich
authors.forename: David
authors.initials: D
authors.lastname: Manton
authors.forename: Jan
authors.initials: J
authors.lastname: Kühnisch
authors.forename: Claudia
authors.initials: C
authors.lastname: Neumann
authors.forename: Carl Peter
authors.initials: CP
authors.lastname: Bauer
authors.forename: Roswitha
authors.initials: R
authors.lastname: Heinrich-Weltzien
authors.forename: Reinhard
authors.initials: R
authors.lastname: Hickel
mesh_terms: D002648:Child; D015331:Cohort Studies; D004245:DMF Index; D003731:Dental Caries / Q000150:complications* / Q000453:epidemiology*; D003744:Dental Enamel Hypoplasia / Q000150:complications* / Q000453:epidemiology*; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D015588:Observer Variation; D010895:Pit and Fissure Sealants / Q000627:therapeutic use; D015995:Prevalence; D018709:Statistics, Nonparametric
chemical_list: D010895:Pit and Fissure Sealants