Evidence map›Paper›PMID 40455303›Full record

SynthesisClinical oral investigations2025

Epidemiological trends in enamel hypomineralisation and molar-incisor hypomineralisation: a systematic review and meta-analysis.

Nour Ammar, Karl-Ferdinand Fresen, Falk Schwendicke, Jan Kühnisch

Abstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in Clinical oral investigations, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Non- and minimally invasive management of hypersensitivity in molar-incisor hypomineralisation (MIH) at home and in clinical practice: a systematic review.European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry · 2026
    Pooled it
  2. Pooled it
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  4. Pooled it
  5. Trial
  6. Trial
  7. Trial
  8. Observational
  9. Oral microbiome signatures of molar-incisor hypomineralisation: insights from a pilot study.European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry · 2026
    Article
  10. Article
  11. Article
  12. Trends in the prevalence of molar incisor hypomineralisation between 2018 and 2023: a comparison of two cross-sectional studies in elementary schools in Mexico.European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry · 2026
    Article
  13. Article
  14. Article
  15. Molar incisor hypomineralisation (MIH) and hypomineralised second primary molars (HSPM): do we need to alter terminology and definition? A scoping review.European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry · 2026
    Review
  16. Article
  17. Clinical significance of residual yellow-brown enamel opacities in severe molar incisor hypomineralisation: a cross-sectional study.European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry · 2026
    Article
  18. To Bleach or Not to Bleach?-The Role of Bleaching in the Clinical Workflow for the Treatment of Demarcated Opacities in Anterior Teeth.Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] · 2026
    Article
  19. Materials (Basel, Switzerland) · 2026
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Nour AmmarDepartment of Conservative Dentistry and Periodontology, University Hospital, Ludwig- Maximilians Universität München, Munich, Germany.
Karl-Ferdinand FresenDepartment of Conservative Dentistry and Periodontology, University Hospital, Ludwig- Maximilians Universität München, Munich, Germany.
Falk SchwendickeDepartment of Conservative Dentistry and Periodontology, University Hospital, Ludwig- Maximilians Universität München, Munich, Germany.
Jan KühnischDepartment of Conservative Dentistry and Periodontology, University Hospital, Ludwig- Maximilians Universität München, Munich, Germany. Jan.Kuehnisch@med.uni-muenchen.de.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo assess the prevalence of enamel hypomineralisation (EH), molar-incisor hypomineralisation (MIH), and hypomineralisation affecting the first permanent molars and incisors (M + IH). It was hypothesized that MIH prevalence had not changed significantly over the last two decades.

methodsPublished literature was screened via PubMed, Embase, Google Scholar, and an extensive hand search. A risk of bias assessment (RoB) was conducted. Prevalence estimates were synthesised in a random-effects meta-analysis and reported at the country-level, continent-level, and globally. Subgroup analyses between different MIH diagnosis indices were conducted. Global MIH prevalence trends between 2000 and 2020 were analysed at 5-year intervals.

resultsAmong the 746 retrieved references, 174 were eligible. However, 138 low-to-moderate RoB studies were included. EH global prevalence was estimated at 25.3% (20.0-30.6) across 21 studies from 15 countries. MIH prevalence was 15.5% (14.4-16.6) across 135 studies from 53 countries, with estimates ranging from 0.6 to 46.6%. Among these studies, 60 reported M + IH prevalence, estimated at 6.9% (6.0-7.7). The global MIH prevalence as analysed in 5-year intervals showed a relatively constant prevalence rate with no significant differences across the years. Similarly, MIH prevalence did not differ significantly based on the diagnostic index used.

conclusionEH phenotypes remain globally widespread with uneven distributions. Data doesn't support the postulated change in MIH prevalence. Assessments of all EH phenotypes and data from underrepresented countries are needed for effective dental health monitoring. CLINICAL RELEVANCE: Oral health professionals should systematically and routinely screen for EH/MIH and discuss it with patients, particularly in high prevalence populations.

Indexed as

Dental Enamel HypoplasiaGlobal HealthHumansIncisorMolarPrevalenceCross-sectional studiesDental enamelDiagnostic techniquesEpidemiologyHealth surveysOral health

Identifiers

PMID40455303
PMCPMC12130135

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.