Can Bone Spur After Oral Surgery Can Be Rectified?

I ve had dentures for 15 yrs now. shortly after having oral surgery I developed a bone spur. it just finally popped out. I know I should have had it treated but I d been in an sorta abusive marriage (if neglect counts as abusive). any way the oral surgean said there are no stem cells in the gums so a hole in my gums from a bone spur will never heal and will eventually kill me. is this true? I m a little freaked out, now that I m single, I really don t want to die.. where the spur fell out from there is no bleeding or pus..I know when I ve had a single tooth pulled the gum healed so I really am kinda confussed what to believe. there s no pain, just relief and some tenderness...