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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.
I completely agree with your dentist. It is not worth it. It is extreemly difficult if not impossible to bond this area without leaving some kind of ledge in between at the gumline. This can lead to a plaque and bacteria trap which may cause gum irritation, bone loss, and cavities.