You can’t just grind your teeth short when they’re long, the teeth are only slightly resharpened within the enamel. If the degree of grinding is large and reaches the dentin, the symptoms of dentin hypersensitivity will occur, resulting in tooth pain and even pulpitis. Therefore, clinically, if the tooth is elongated due to the loss of teeth in the opposite jaw, it is not possible to shorten the tooth at will. Therefore, once a tooth is missing in the mouth, it should be restored in time to prevent excessive elongation of the opposite jaw teeth, resulting in occlusal relationship disorders. Some of the elongated teeth even need to do root canal treatment first to kill the nerve of the tooth before it can be adjusted to shorten the grinding, and at the same time to do porcelain crowns or all-ceramic crowns restoration. In addition, some patients suffering from periodontitis due to alveolar bone resorption, resulting in the clinical crown of the tooth is getting longer and longer, so that the tooth in the mouth appears to be longer and longer, for this kind of teeth can not be casually grinding short. This group of people can only do systematic periodontal treatment to prevent further lengthening of the clinical crown of the tooth due to its resorption.