Table 3. Molar and incisor hypomineralization treatment need index.²².

Score	Definition
0	No MIH
1	MIH without hypersensitivity and without defect
2	MIH without hypersensitivity, but with defect
2a	< 1/3 defect extension
2b	> 1/3, but < 2/3 defect extension
2c	> 2/3 defect extension and/or defect close to the pulp requiring extraction or atypical restoration
3	MIH with hypersensitivity, but without defect
4	MIH with hypersensitivity and with defect
4a	< 1/3 defect extension
4b	> 1/3, but < 2/3 defect extension
4c	> 2/3 defect extension and/or defect close to the pulp requiring extraction or atypical restoration