It is not recommended to pick the calculus, especially not with hard objects, because the calculus itself is attached to the tooth surface, especially in the gingival sulcus is very firm calculus-like material, it is generally difficult to remove it by brushing or normal cleaning methods, the clinical cleaning of calculus is more professional method is scaling, which is commonly known as supragingival scaling, it is through the ultrasonic shock way, the large pieces of It is done by ultrasonic shock to shatter large pieces of calculus and then remove them. It is very difficult to remove large pieces of calculus by physical means alone, especially since it is not easy for the patient to see the exact location and depth of the calculus, so it is recommended that the patient go to a professional oral health care facility to remove the calculus.