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Classification systems of enamel hypoplasia.
| Enamel hypoplasia by clinical features |
| Pitts |
| Lines/grooves |
| Areas |
| Enamel hypoplasia by pathogenesis |
| Hypoplastic enamel matrix production |
| Matrix hypomineralisation |
| Enamel hypoplasia by etiologic factors |
| Hereditary factors |
| Amelogenesis imperfecta |
| Environmental factors |
| Trauma |
| Infectious (i.e., CDV) |
| Pyrexia of any origin |
| Chemicals with toxic influence on ameloblasts (i.e., fluoride) |
