[Navigation in knee endoprosthesis implantation--preliminary experiences and prospective comparative study with conventional implantation technique].

摘要: OBJECTIVES The efficiency of a computer-integrated instrumentation system in knee arthroplasty was evaluated and compared with conventional system. BACKGROUND OrthoPilot System defines the individual axis leg by means an intraoperative kinematic analysis. LED's mounted on rigid bodies screwed to pelvis, femur tibia are localized 3D infrared camera which is linked UNIX work station. integrated calculation program leads definition centres hip, ankle. Thereafter, LED-equipped alignment instruments allow femoral tibial main resection planes. METHOD first sixty cases were included study. In addition, thirty each entered into group similar control group. navigated cohort consists one thirty, thus enclosing "learning curve". RESULTS Leg axes angles assessed radiographically at three-months postoperative control. Radiological measurements clearly superior those manual differences, however, not statistically different parameters "mechanical axis", "femoral lat." "tibial ap.". With regard parameter significant difference favour navigation observed. ap." insignificantly better general, slight tendency towards valgus positioning components when using has be discussed. Complications influencing clinical outcome did occur. Additional time for calculated range ten fifteen minutes. CONCLUSIONS facilitates proper endoprosthetic tibia. Generally, obtained values representing technique. Marked deviations from ideal can almost avoided During learning curve gained reliability reproducability.