Which surgery is most successfully in growing back gums?

I had combination of pinhole surgery and gum graft a year ago. However after the surgery, the gums didn't elongate back to the original height as much as I would have liked. The periodontist who explained this is in part because the gums will only cover the tooth as much as there is bone support. Ideally, I would like the gums to to cover the teeth by another 2mm. Is there any type of surgery or new advancement that could improve my "long in the tooth" appearance? I have heard about Rejuvagum.