Implementation of a CT-based navigation system in two-stage reimplantation for infected total knee arthroplasty.

Femorotibial alignment is an important factor affecting patient outcome after total knee arthroplasty (TKA). It was the aim of this study to report our first results using a CT-based navigation system in two-stage revision surgery for infected TKA. Two patients with chronic deep infection after primary TKA underwent two-stage revision arthroplasty with temporary articulating cement spacers followed by prosthesis re-implantation using a CT-based navigation system. Postoperative radiographs showed accurate alignment of the femoral and tibial components. CT-based navigation systems offer the opportunity for preoperative planning and accurate intra-operative navigation of cutting blocks. They can be considered of value for primary TKA but even more so for two-stage revision arthroplasty.