Further discussions are needed regarding the currently used criteria for MIH diagnosis.

The letter discusses the need for further discussions regarding the current criteria used for diagnosing molar incisor hypomineralisation (MIH). Despite the condition being defined over 22 years ago, there is still limited understanding of its causes. The authors argue that the lack of standardized diagnosis and calibration criteria, as well as the multifactorial nature of the defect, contribute to this limited understanding. They highlight the introduction of various diagnosis criteria, with one set of criteria being widely recognized and recommended by the European Academy of Paediatric Dentistry. However, the authors suggest that these criteria may exclude certain manifestations of MIH, potentially leading to an underestimation of the defect and influencing our understanding of its prevalence, causes, and treatment. They call for a reassessment of the criteria and further discussions within the scientific community. [Extracted from the article]