Evaluation parameters
postoperative swelling, phobia, swelling, pain
BLEEDING, BLOOD LOSS

Operative time (time from incision to the end of suturing);intraoperative bleeding Blood loss = (weight of blood gauze a weight of dry gauze) + the amount of blood in the suction bottle will be weighed before the operation, to use dry gauze instead of saline gauze during the operation, the amount of blood in the suction bottle should be noted minus the possible amount of saline or other liquids, the unit of weight is "g", 1 ml of blood is calculated as 1 g.;Postoperative the changes in pain were observed in the three groups at 1d, 3d, and 7d postoperatively and were assessed using the Visual Analogue Scale (VAS) for pain, with a score of 10, the higher the score the more severe the pain;Swelling Assessment was done by measurements, which were performed for the same person and averaged after three measurements. Specifically, the patient's pre-operative and post-operative distances were measured at 24 and 72 h (distance between the angle of the jaw and the corner of the mouth, the distance between the angle of the jaw and the nose, and distance between the angle of the jaw and the external canthus). Then the sum of the postoperative measured distances was subtracted from the sum of the preoperatively measured distances, and the degree of postoperative swelling would be classified into four categories according to the values obtained. The value obtained ≤ 1 indicates normal; the value obtained 1–3 is mild swelling; the value obtained 3–5 is moderate swelling; and the value obtained > 5 indicates severe swelling.Dental phobia was assessed using a questionnaire: very afraid: 1 point, somewhat afraid: 2 points, not feeling: 3 points, 4 without any fear: 4 points.