root coverage造句

However, it was only in 1985 that Langer proposed the SECT for root coverage following gingival recession.
This procedure has the advantage of excellent predictability of root coverage, as well as decreased pain at the palatal donor site compared to the free gingival graft . The subepithelial connective tissue graft is a very common procedure for covering exposed roots.
It's difficult to find root coverage in a sentence. 用root coverage造句挺难的