It is not possible to grind down a tooth that is protruding. If the tooth is protruding for physiologic reasons, simply grinding it down can cause dental inflammation. If the tooth has a malformed central cusp and protrudes, it can be ground off in stages. Each tooth has its own unique shape can not be adjusted to grind, if found that the teeth protruding can be considered using denture repair or orthodontic treatment. Normal teeth have their own different cusp, tongue protrusion, generally physiological protrusion, can not be adjusted to grind, if unauthorized adjustments to grind, there may be dentin sensitivity, cold, hot, sweet and sour discomfort. Teeth protruding may be caused by malocclusion, it is recommended to go to the hospital after examination, through the orthodontic method to retract the protruding teeth, or consider fixed denture repair, through appropriate grinding, the use of fixed denture to restore the normal alignment of the teeth. Teeth protruding is not recommended to grind off, the specific need to go to the hospital according to the oral examination to determine the treatment program.