The VAS scores of test group during postoperative 24 h to 1 week were 3.39 + / - 0.69 , 2.79 + / - 0.51 , 2.16 + / - 0.52 , and 1.07 + / - 0.57 separately , which were lower than 3.80 + / - 0.86 , 3.22 + / - 0.58 , 2.53 + / - 0.54 and 1.38 + / - 0.52 in the control group .