After a crown visit, avoid chewing on the crown for 24 to 48 hours. It is common to experience some soreness in the gum directly surrounding the tooth or around the local anesthetic injection site. Taking 2 advil or tylenol, every 4 hours as needed, can help with the discomfort. Rinsing with warm salt water rinses (one teaspoon per cup) will help with sore gums. Some sensitivity to cold, hot and biting is common and usually subsides within the first two weeks. Sensitivity to biting and temperature can indicate that the crown may be hitting too hard in certain chewing motions and should be adjusted. Please call the doctor if you feel you need the bite adjusted or if you experience sensitivity that lasts more than a month. Sensitivity that lasts longer than three months is an indication that root canal therapy may be needed.