The study is designed to assess the efficacy of vancomycin powder and dilute povidone-iodine lavage (VIP protocol) in reducing the PJI after primary Total Hip Arthroplasty (THA) and Total Knee Arthroplasty (TKA). We hypothesized that VIP protocol provides superior reduction of periprosthetic joint infection (PJI) rates after primary THA and TKA compared with diluted povidone-iodine (PI) protocol.

Patients who undergo primary hip or knee arthroplasty, before closure 0,35% povidone-iodine (17,5mL in 500 mL saline) solution lavage left for 3 minutes following final implantation.

Patients drawn by random numbers calculator will be administered with 1.0 g Vancomycin powder into the wound around the prosthesis and no suction will be used.

Inclusion Criteria:

• undergoing THA or TKA as a result of osteoarthritis or rheumatoid arthritis, can understand and comply with the study protocol, have signed the informed consent document at screening

Exclusion Criteria:

• Patients referred to the hospital in order to undergo THA or TKA due to different reason than osteoarthritis, rheumatoid arthritis or avascular necrosis of the femoral head, such as: failed femoral neck fractures, displaced acetabular fractures or revision acetabular fractures, revision knee or hip arthroplasty