After the surgery, a small piece of tubing is placed into both extraction sites. Every 20 minutes for the next 3 hours, inflammatory fluid is collected from the tubing to measure chemicals that are believed to cause pain and swelling. Patients complete questionnaires every 20 minutes to rate their pain. Those who still have pain an hour after surgery may request and receive a "rescue drug" called tramadol (Ultram® (Registered Trademark)) for pain relief. Patients remain in the clinic from 3 to 6 hours to monitor the effects of the study drugs as the anesthetic wears off.