In orthodontic treatment, elastics are hung between orthodontic appliances (brackets, retractor hooks) to produce an elastic force on the teeth and dental arch. The elastics are usually worn by the patient as prescribed by the doctor. (1) In order to maintain continuous and stable traction, the rubber band must be worn 24 hours a day and changed once a day before going to bed, if not, the treatment time will be prolonged. (2) Hang the rubber band every day according to the doctor’s instruction, only take it off when eating and brushing after meals, and put it on immediately after brushing teeth. (3) Carry the rubber band with you in case it is damaged and keep it as a backup. (4) If you forget to wear the rubber band one day, continue to wear it must not increase the amount of wear, but still wear it according to the doctor’s instructions. (5) Do not prolong the replacement time because the rubber band is not damaged, a rubber band hanging for too long, the elasticity decreases, the role of the teeth also decreases, not to arbitrarily increase the p theft Jun (6) If the elastic traction often fails (belt loosening, traction hook warping, etc.), to timely follow-up, do not wait for the next follow-up time.