Decamarcated hypomineralised lesions of enamel include those developmental defects that are related to MIH, HSPM or any other demarcated opacities of systemic origin. The present study’s aims are to determine MIH/HSPM prevalence, caries lesion severity and their association in a sample of 6–12-year-old schoolchildren from Talca, Chile.
The sample (N = 577) was derived from selected primary schools in urban Talca. A full dental examination was performed at the school by one calibrated examiner. Socio-demographic data and caries experience (DMFT/dmft/merged ICDAS II and PUFA/pufa) were measured in primary and permanent dentitions. MIH/HSPM was assessed using a modified EAPD protocol. Binary and multilevel binary regression analyses were calculated.
The prevalence of MIH/HSPM or other demarcated hypomineralised lesions was 24.4%. MIH and HSPM was 15.8% and 5%, respectively. The presence of HSPM predicted MIH (OR 3.7; 95% CI 1.65–8.15) when corrected by demographic factors. Of the children examined, 35% had no teeth with a score greater than ICDASII Code 0 and 26% had one or more severe carious lesions (Code C). Toothwise multilevel binary regression analyses demonstrated that teeth with MIH/HSPM (OR 3.70) from low-SES children (OR 1.93) had higher odds for carious lesions compared with defect-free teeth from high-SES participants.
MIH/HSPM lesions were associated with carious lesion occurrence and increased disease severity. The prevalence of MIH and HSPM was similar to other reports. Increased awareness of MIH/HSPM in schools and primary health settings may help to identify children at risk early.
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Molar incisor hypomineralisation
Hypomineralised second primary molars
Decayed missing filled teeth
International caries detection and assessment system
Pulp, ulceration, fistula, abscess index
European Academy of Paediatric Dentistry
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We thank the parents and children, school principals and staff, University of Talca Dental Clinic, Melbourne Dental School, Oral Health CRC University of Melbourne and Procter & Gamble (Oral-B) for the donation of tooth brushes and paste. We acknowledge Becas Chile Scholarship program from CONICYT for sponsoring KG’s university fees.
This study was funded by Melbourne Dental School, Postgraduate Research Fund. Becas Chile scholarship program from CONICYT funded the student researcher’s University fees.
Conflict of interest
Procter and Gamble donated toothbrush and toothpaste for participants. However, the company had no influence in the interpretation of the present study’s results. Authors declare that they do not have any conflict of interests.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study.
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Gambetta-Tessini, K., Mariño, R., Ghanim, A. et al. The impact of MIH/HSPM on the carious lesion severity of schoolchildren from Talca, Chile. Eur Arch Paediatr Dent 20, 417–423 (2019). https://doi.org/10.1007/s40368-019-00416-w
- Carious lesion