The side effects of dental calculus to be scaled are: it needs to be clear that there are no side effects of scaling, and there will be side effects of dental calculus. The formation of large pieces of calculus on the teeth will stimulate the gums to make brittleness, capillary hyperplasia after penetration becomes stronger. In the process of scaling, due to the ultrasonic shock and stimulation caused by gum bleeding, 3-5 days to gradually stop. Large calculus is easy to press the alveolar bone resorption, gums appear shrinkage, removal of the teeth gap becomes larger easily embedded food debris and soft tartar, causing swelling and pain, while the exposed root surface of the teeth due to thin bone, will be sensitive to hot, cold, sour and sweet stimuli such as sensitive reaction. Some teeth rely on the support of calculus for a long time, and after removal, the looseness of the teeth is more obvious, producing pain when chewing, and seriously loose teeth need to be extracted as soon as possible.