Reliable Alignment in Total Knee Arthroplasty by the Use of an iPod-Based Navigation System

Figure 1

(a) Intraoperative setting. (b) Reference arrays attached to femur and tibia. (c) The cradle is attached to the cutting block for proximal tibial resection. (d) Digitalisation of anatomical landmarks performed using the pointer attached to the handheld cradle. (e) Digitalisation of distal femur anatomy is performed using a special digitalisation tool attached to the cradle.

(a)

(b)

(c)

(d)

(e)