When you hang up with a dentist for a black spot on your tooth, the doctor will examine the tooth that formed the black spot and take oral x-rays if necessary. If the black spots are exogenous pigments such as tea stains or tobacco stains, they can be removed using a smooth turning needle. If the black spot is large, it can be completely removed by ultrasonic cleaning or sandblasting, and when black spots exist on the neighboring surfaces of the teeth, they need to be removed by using a wheeled abrasive sheet to chip away at them. If there is a roughness at the black spot when using a probe to pull it, or even if there is a fallout, and if the X-ray shows that the density of the black spot area is lower than that of the surrounding tooth tissues, it means that caries has been formed, and it is necessary to abrade the black tooth tissues, prepare a cavity shape, and fill it with composite resin similar to the color of the tooth.