The prevalence and characteristics of and the association between MIH and HSPM in South‐Western France

Abstract

Background Molar–incisor hypomineralisation (MIH) and hypomineralised second primary molars (HSPM) involve qualitative structural developmental anomalies of tooth enamel, affecting the first permanent molars (FPM) and the second primary molars, respectively. This developmental anomaly of systemic origin has important consequences for oral health. Aim To determine the prevalence of MIH and HSPM in south‐western France and explore the distribution of hypomineralised lesions on permanent and primary molars. Design Amongst 856 children (aged 7–9 years) in schools randomly selected by the Academy of Bordeaux (Ministry of Education), the FPM, permanent incisors and the second primary molars were examined by two examiners trained and calibrated for the diagnostic criteria for MIH and HSPM of the European Academy of Paediatric Dentistry. Results Molar–incisor hypomineralisation was present in 160 children (18.7%) and HSPM in 81 children (9.5%); 4.9% had both HSPM and MIH (42 of 856). Hypomineralised lesions were present in 1–4 FPM in affected individuals (mean = 2.4) and were distributed in an asymmetrical manner with widely varying severity at the tooth and individual level. A child with HSPM was more likely to have MIH than a child without HSPM (95% CI OR = 6.0 [3.7–9.7]; p < .0001). Conclusion Molar–incisor hypomineralisation and HSPM have three main asymmetrical characteristics: tooth location, severity of hypomineralisation and number of teeth affected.

Predictive Value of Hypomineralization of Second Primary Molars for Molar Incisor Hypomineralization and Other Relationships between Both Developmental Defects of Dental Enamel

“…Furthermore, both samples were drawn from the same orthodontic population by applying the same inclusion/exclusion criteria, thus ruling out this possible bias. Moreover, the frequency of MIH in the UHFJD orthodontic database for the age range spanning 7 to 10 years (around 12%) was similar to or even lower than that appearing in epidemiological reports published on school or general populations [17,18,29,36]. Therefore, with respect to the frequency of MIH, the orthodontic sample used for the present study can be considered comparable to a sample of schoolchildren of the same age range.…”

“…In the present study, all children were between 7 and 10 years of age, which allowed for the coexistence of FPM and SPM according to the research objectives and design. In the studies of Ghanim et al [25] and Estivals et al [36], children were between 7 and 9 years of age, and in the study of Negre-Barber et al [29] they were between 8 and 9. The age range in the research of Da Silva et al [27] was from 6 to 11 years.…”

“…The adapted criteria proposed by the EAPD for MIH in the permanent dentition [21,22] were used to characterize HSPM [22]. Since the EAPD criteria were published, they have been widely adopted in epidemiological and clinical studies on MIH, but much less so in research on HSPM [4,10,27,28,36] which has been noted as one of the most important shortcomings of research on the subject [25].…”

Real-World Evidence on the Prevalence of Molar Incisor Hypomineralization in School Children from Bucharest, Romania

“…This site is of particular interest because of a potential association that is still being explored between MIH and hypomineralized second primary molars (HSPM). So far, data from the field literature on this topic remain conflicting [ 15 , 29 ]. Our results have confirmed a potential trend for an association between the presence of HSPM and the presence of MIH ( p = 0.020), which suggests that the deciduous second molar could potentially be an early indicator of a higher risk for MIH.…”

Chẩn Đoán Và Điều Trị Răng Cối Sữa Thứ Hai Kém Khoáng Hóa

“…Cùng ý nghĩa với nghiên cứu của Julia Estivals (2022) trên 856 trẻ tuổi từ 7-9 trong khi gọi khám ngẫu nhiên do Viện hàn lâm của Bordeaux để kiểm tra răng cối lớn thứ nhất, răng cửa vĩnh viễn và răng cối sữa thứ hai theo tiêu chuẩn của EAPD, kết quả cho thấy tỷ lệ MIH là 18,7%, tỷ lệ HSPM là 9,5%; trong khi đó tỷ lệ trẻ mắc đồng thời MIH-HSPM là 4,9% có sự phân bố không đối xứng tình trạng răng kém khoáng với mức độ trầm trọng khác nhau ở cấp độ trẻ và cấp độ răng. Trẻ mắc HSPM hầu như dễ mắc MIH so với trẻ không mắc [15].…”