Impact of corticosteroid on periarticular injection for pain control following total knee arthroplasty: a double-blind randomized trial

INTERVENTION: A periarticular injection including methylprednisolone, ropivacaine, morphine, bosmin, and ketoprofen for pain after total knee arthroplasty A periarticular injection including ropivacaine, morphine, bosmin, and ketoprofen for pain after total knee arthroplasty CONDITION: osteoarthritis, rheumatoid arthritis, avascular necrosis of femoral condyle PRIMARY OUTCOME: Visual Analogue Scale for postoperative pain at rest SECONDARY OUTCOME: Visual Analogue Scale for postoperative pain during activity; Complication INCLUSION CRITERIA: Patients scheduled for unilateral total knee arthroplasty