Validity and reproducibility testing of the Molar Incisor Hypomineralisation (MIH) Index

Abstract

Background: To address challenges presented to clinicians to diagnose and treat molar incisor hypomineralisation (MIH), a new assessment tool was created. Aim: To explore the reproducibility and validity of a new instrument developed to assess MIH. Methods: Inter-rater and test-retest reliabilities were examined using Cronbach's alpha. Thirty-five oral health professionals scored clinical photographs for the presence/absence of MIH and other enamel defects using the new index. Face, content, and construct validities were assessed. A panel of six experienced researchers assessed face validity. Construct validity was determined by examining hypothesised associations with clinical variables rep..