I've had a permanent bridge running between my eye teeth for 17 years and it was failing. 5 weeks ago I had it removed, my eye teeth were extracted, two implants were placed and some bone grafting was performed. I've been wearing a temporary denture to fill the space. Everything has healed up quite nicely, until today, I just noticed that there seems to be some hard white material poking through my gum and I don't know if this means that my bone graft is failing. There is no pain or discomfort.