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dental ledge. 1. a band of ectodermal cells growing from the epithelium of the embryonic jaws into the underlying mesenchyme; local buds from the ledge give rise to the primordia of the enamel organs of the teeth.
avulsed tooth a tooth that has been traumatically dislocated, usually salvageable for a reimplantation if appropriate treatment is initiated promptly. Prior to treatment the tooth can be placed in the conscious patient's mouth or in ice water or cold milk.