DENTIST: Saw dentist today for 18 xrays, cleaning, exam. All good. Later noticed a tiny sliver type area missing front of lateral incisor. CONCERN?

Go back to your DDS. Your dentist will assess your dental problem and discuss your treatment options with you.
More info needed... Does this lateral incisor have a bonded restoration (white filling)? If so, then the area in question should be polished out. It will feel smoother and trap less bacteria.