Table 1: Witkop's classification of amelogenesis imperfecta
| Type | Features of the enamel |
| Hypoplastic | • Reduced crystal size • Insufficient amount • Ormal composition |
| Hypocalcified | • Soft and fragile • Sufficient amount |
| Hypomaturation | • Mottled • Opaque white to red brown coloration • Soft • Loose connection to the dentin |
| Hypomaturation-hypoplastic | • Taurodontism |