Table 2.
epithelium | mesenchyme | |||
---|---|---|---|---|
ide | ode | odontoblasts | dental papilla | |
initiation | ++ | ++ | - | - |
morphogenesis | ++ | ++ | - | - |
early cytodifferentiation | ++ * | ++ * | - | - |
late cytodifferentiation | ++ * | ++ * | - | - |
attachment |
The two layers of the enamel organ, IDE and ODE, maintain the expression of E-cadherin. The mesenchyme-derived dental papilla does not express this cell adhesion molecule during development. *: stronger expression of E-cadherin on the ventral side of the developing tooth.