Randomized Prospective Comparative Study of Adductor Canal Block vs Periarticular Infiltration on Early Functional Outcome After Unilateral Total Knee Arthroplasty.

Background: Total knee arthroplasty (TKA) is associated with significant postoperative pain. Effective pain relief is essential for early postoperative rehabilitation. Periarticular infiltration (PAI) and adductor canal block (ACB) have become popular modes of pain management after TKA.