TABLE 1. Classification of the Wear stages (A-E) defined by the enamel folds.
| Wear stage |
Enamel fold stage |
| Stage A | All five folds are visible |
| Stage B | The anterosinusid is sealed off |
| Stage C | The protosinusid and/or the posterosinusid are sealed off |
| Stage D | The mesosinusid is sealed off |
| Stage E | The sinusid is sealed off |
