We report two cases of infected total knee arthroplasty. One case was osteoarthritis and the other case was rheumatoid arthritis. In both cases, the detected microorganism was MSSA. Treatment consisted of resection arthroplasty (removal of the implant and debridement of infected tissue) with closed continuous irrigation. Both cases had no symptoms of infection after resection arthroplasty. One case showed extension lag and lateral instability. Neither experienced pain and they are able to walk without knee brace. For indicated cases, resection arthroplasty is a useful treatment for infected total knee arthroplasty.
