It can be ground, but if the normal and functional teeth can only be ground to 1~2mm, the teeth will become sensitive if they are ground too much, and may be painful if they are exposed to cold, heat or acid. Simple grinding teeth should not satisfy the effect you want to achieve. If only one or two teeth affect the beauty of the whole mouth, you can also choose to make porcelain teeth to repair the tooth shape. However, nothing can compare with your original teeth. I advise you to think twice!