Teeth without nerves do not typically become brittle and black after a high onlay restoration. When a patient removes the nerve from a tooth, there is no way for the tooth to receive nutrients from the nerve, and the tooth may become brittle and black after a long period of time. However, timely high inlay restoration can provide a full range of protection package for the teeth to reduce food and other external factors on the formation of stimulation caused by the damage, there will be no brittle black teeth, but can be very good to restore the patient’s chewing function. In addition, high inlay repair is generally used in all-ceramic material, which itself is relatively white and not easy to stain residue, as long as it is adhered to every day to do a good job of dental cleaning, there will be no black and brittle situation. Teeth do high inlay restoration care is still very important, it is best to follow the doctor’s instructions for review and care.