A patient came to a dental clinic for the purpose of prosthetics. Objectively: the lower third of her face is diminished, nasolabial folds are deepened, frontal group of teeth on both upper and lower jaws is missing, crowns of the 17, 15, 26, 27, 36, 37, 45, 47 teeth are worn by 2/3 of their height, masticatory surfaces of these teeth are smooth, pigmented, alveolar process is not hypertrophied, interalveolar height is reduced. What form of pathological tooth wear is it?