Well, I will offer you an observation, but without knowing more details, it may only address one aspect of your question. There are several reasons that intra-oral grafts are used. The most obvious is to replace tissue bulk which has been lost due to the surgery. Muscle tissue is grafted to help reconstruct the tongue and floor of the mouth for instance. Given the areas in which these two doctors are suggesting grafts from, the reason for the grafting is likely different. After a surgery of this type, it used to be common to let the tissues of the mouth heal in on their own, this is called "by secondary intent"... the body just heals the area the best that it can using the tissue type which is common to that area. This isn