A female patient consulted a dentist about dental prosthetics. Objectively: the lower third of the patient's face is shortened, nasolabial folds are deepened, frontal group of lower and upper jaw teeth is missing, the crowns of the 17, 15, 26, 27, 36, 37, 45, 47 teeth are worn off by 2/3 of their height, masticatory surfaces of these teeth are smooth and pigmented. The alveolar process isn't hypertrophied. Interalveolar height is decreased. Specify the form of pathological tooth wear in this patient: