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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.
A dental bridge is used to span, or bridge a gap (missing teeth) between teeth. Same as with crowns, teeth on either side of the empty space are reshaped. A dental bridge is a false tooth or teeth, which is fused between two porcelain crowns to fill in the area left by a missing tooth or teeth. This is known as a fixed bridge. A bridge is used to replace one or more missing teeth.