overgrafting

Placing a second or additional grafts over a previously healed graft from which the epithelium has been removed, as with dermabrasion, to strengthen and thicken a split-thickness graft.

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over·graft·ing (o″vər-graftґing) the application of a second skin graft over a previously healed graft from which the epithelium has been removed, as a means of reinforcing split-thickness grafts.