Had a bone graft from cadaver dental implant.done about a month ago felt something pull out that looks like a small white worm. could it be that?

Bone spicule: Yes, it could be a part of the grafted bone, or a piece of your bone that did not attach to the area. We call this a spicule (fragment) and is very common. Think of it as a small splinter working its way to the surface. Usually they feel very sharp to the tongue and much bigger than how small they are when they come out. I removed 2 last week. Not to worry. Good Luck.

Resorbable Membrane: Allograft (Bone from another Human Being) are powder or pellets. It was most likely Collagen Resorbable Membrane.