 The patients will be randomly divided into one of two groups. Patients in group 1 will receive local infiltration with 2 mg kg of tramadol diluted in 5 ml of 0.9 saline solution and 20ml of 0.9 saline solution intravenously at the end of the surgical procedure Patients in group 2 will receive 2 mg.kg-1 tramadol intravenously diluted in 20 ml of 0.9 saline solution and local infiltration with 5 mL of saline solution 0.9 at the end of the surgical procedure. 