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ArticleEuropean archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry2026

Prevalence and characteristics of hypomineralised second primary molars in Irish school children.

H D McGrory, R Leith, A C O'Connell

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Article in European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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4 · The record

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5 · Who and what money

Authors and funding

3 authors.

H D McGroryDepartment of Child Dental Health, Dublin Dental University Hospital, Trinity College Dublin, Dublin, Ireland. mcgroryh@tcd.ie.
R LeithDepartment of Child Dental Health, Dublin Dental University Hospital, Trinity College Dublin, Dublin, Ireland.ORCID https://orcid.org/0000-0001-7407-7930
A C O'ConnellDepartment of Child Dental Health, Dublin Dental University Hospital, Trinity College Dublin, Dublin, Ireland.ORCID https://orcid.org/0000-0002-1495-3983

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe primary aim of this study was to investigate the prevalence and characteristics of hypomineralised second primary molars (HSPM) and to assess its association with dental caries and molar incisor hypomineralisation (MIH).

methodsFollowing ethical approval, a cross-sectional study was completed for children aged 4-6 years, investigating the clinical characteristics of HSPM, MIH and dental caries. Participants were examined in school settings using the MIH/HSPM and d

resultsOf 401 children who were examined [age-mean (SD) = 5.4 (0.68) years; males = 53%]. Prevalence of HSPM was 20.9% (84/401). Most participants had only one affected second primary molar (51%). Demarcated opacities were the most common lesion (62%), followed by atypical caries lesion (23%), post-eruptive breakdown (6%) and atypical restoration (2%); lesion extension and severity were significantly related (P < 0.05). The prevalence of MIH in 174 participants who had at least one first permanent molar erupted was 29.3%. The co-occurrence of MIH and HSPM was 9.74%. The caries prevalence was 34% (mean d

conclusionThe prevalence of HSPM was 20.95% at child level and 9.65% at tooth level and was associated with dental caries in children aged 4-6 years.

Indexed as

CariesDecidiousHSPMHypomineralisationMIHPrevalencePrimary molar

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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.