facing:
    the visible portion of a crown; may be acrylic, composite or porcelain
filling:
    restoring lost tooth structure with metal, alloy, porcelain or resin
fistula:
    tunnel conducting pus from one infection to the site of another; a mouth fistula is called a gum boil
flap surgery:
    loosening of gums from bone to expose and clean underlying tooth structures
forceps:
    instrument used to remove a tooth
full denture:
    removable denture replacing all teeth in upper or lower arch
frenectomy:
    removal of the frenum, the thin cord of tissue that attaches the upper or lower lips to the gum or the tongue to the floor of the mouth