Whether or not a large tooth can be filled with severe wear depends on the situation. If the patient has a very small wear, even after filling, it may fall off again after the patient’s wear, so if there is a relatively small wear without obvious symptoms, it can be controlled by improving the habit without filling. If there is a large, round and depressed, deep wear, from the clinical point of view, wear and upper and lower teeth found after the bite gap can be filled, if there is no gap, after filling the affected teeth will appear a high point of occlusion, so there is damage to the whole tooth. If the patient is more worn or flat, the filling alone may not solve the problem, depending on the condition of the pulp, and a later restorative treatment will be chosen. If the patient does not have obvious pulp symptoms and is far from the pulp chamber, inlay restoration may be an option. If the patient develops pulp symptoms, a high inlay or full crown restoration can be chosen after root canal treatment, thus improving the wear of the affected tooth. Therefore, filling is not the only way to improve tooth wear, and it is not necessary to have a dental filling to improve the wear of a large tooth.