First of all, we should try to use mechanical cleaning, such as washing, to remove dirt and foreign bodies from the wound. Irregular wound edges can be slightly trimmed, and tissue should be preserved as much as possible, and the wound should not be widely removed. All pedicled tissues should be preserved even if the pedicle is small, and they should be restored to the original position and sutured as much as possible. Special attention should be paid to the anatomical reduction of oral and facial skin lacerations. Accurate intermittent sewing with thin thread.

Second, the nose, lips, ear shell, eyebrow arch and other tissues. If transplanted freely within a few hours, cells in vitro can survive. In vitro tissues should be washed with normal saline, and then soaked in appropriate broad-spectrum antibiotic solution 10- 15 minutes before transplantation.

Third, deep trauma of mandible and parotid gland and jaw injury penetrating oral cavity were treated with rubber strip drainage after debridement and suture. For a wound caused by a large area of tissue defect in the oral cavity and cheek, we should not sew the wound edge reluctantly, which will cause scar contracture and difficulty in opening the mouth in the future. After proper debridement and dressing of the wound edge, the wound edge of the oral mucosa and the wound edge of the skin are stitched together to eliminate the wound surface and reserve the defect for later repair;

Four, for large maxillofacial trauma combined with tissue defects and large skin and muscle flap open, to properly reset the tissue flap and do a good job of positioning suture, so that it can be maintained in a close to normal position, so as to avoid dislocation healing. Sewing method can add a small rubber pad under the shirt button and sew it with thin stainless steel wire through the button hole. When there is no thin stainless steel wire, nylon wire or silk wire can also be used instead.

5. Simple parotid duct rupture can be anastomosed with line 0. A thin plastic tube is placed in the catheter, one end of which leads out from the catheter mouth on the buccal mucosa and leads to oral drainage. For catheter injury with defect, the breach near the heart segment can be transferred to the buccal mucosa to avoid the occurrence of external parotid fistula. The ruptured parotid gland should be sutured as much as possible and covered with a flap.

Six, for tongue laceration, you can use medium silk thread for mattress suture, 1-2 stitches. Before knotting, put a small piece of rubber plate under the knot to prevent the silk thread from embedding into the tissue when knotting or when the tongue is edema after operation. The edge of the wound should be stitched deeply and intermittently.