After the missing tooth root canal treatment many times, can be more than a month before filling, in this period need to pay attention to avoid biting hard objects, to avoid the crown fracture. 1. tooth root canal treatment many times after the basic elimination of inflammation, fistula healing, after the oral surgeon for root canal filling, in order to prevent the tooth after root filling and then the problem of pain, the patient can be observed for 7 days to 14 days, or even a month before filling, but the specific filling time is recommended to determine the best in accordance with the doctor’s orders. 2. Generally speaking, after the tooth has completed several root canal treatments and the root filling has been completed, the tooth can be filled and repaired after seven days of routine observation, but if the scope of the original inflammation of the tooth is too large, it is possible to need to observe for half a month to one month before the filling is done. If the patient’s personal consultation time and personal factors and other issues, the need to delay a month filling, it is recommended that the best consultation with the attending physician before determining. If you need to delay the filling for one month after several root canal treatments for missing teeth, you need to pay attention to avoiding hard foods and maintaining oral hygiene during this period.