Postoperative pain defined as a subjective evaluation of the same parameter using an horizontal visual analogical scale daily for the first week and weekly till 60 days after surgery. Patients will be administered Paracetamol IV 3 times a day for the first 24h, than on demand. Tramadol will be administered when Paracetamol will not be judged sufficient for pain control. On request, a single-dose of Ketorolac can be prescribed.