1. Debridement of oral and maxillofacial trauma patients should be performed as soon as possible, as long as their general conditions permit, or if they get better after first aid and conditions are met. Debridement is the basic method to prevent wound infection and promote healing. The general principle is to do it as soon as possible after injury, and the general principle is to do it within 6 ~ 8 hours. Maxillofacial wounds, due to rich blood circulation and strong anti-infection ability of tissues, can still be debrided and sutured early after this time. Debridement is divided into the following three steps:

(1) Washing the wound: Bacteria mostly stay in the superficial part of the injured tissue within 6 ~ 12 hours after entering the wound, and do not multiply in large quantities, so they are easily removed by mechanical washing. First, cover the wound with sterile gauze, and rinse the skin around the wound with soapy water and external saline. If there is grease, wipe it with gasoline or detergent. Then wash the wound with a large amount of physiological saline or l%~3% ~ 3% hydrogen peroxide under anesthesia, or scrub or soak the wound with low concentration iodophor, and scrub the wound repeatedly with gauze to remove bacteria, silt, tissue fragments or other foreign bodies in the wound as much as possible. While cleaning the wound, you can further check the tissue damage.

(2) Cleaning the wound: After cleaning the wound, disinfect the skin around the wound, spread a towel and debride. In principle, the injured maxillofacial tissue should be preserved as much as possible. Except for necrotic tissue, it is generally only necessary to trim the edge of the wound slightly. Laceration of the genus, tongue, nose, ears, eyelids and other important parts, even if most of them are free or completely detached, as long as there is no infection or necrosis, may still be stitched back to the original position and survive.