Veränderungen ausgewählter Parameter der Kniegelenkmechanik vor und nach operativem Ersatz des vorderen Kreuzbandes bei unterschiedlichen Operationstechniken

In this study 40 patients were observed before, 3, and 6 months after an autologous anterior cruciate ligament surgery using the UST ultrasound motion analysis. This motion analysis was used to collect data from the normal gait on a treadmill (4 km/h and 5 km/h) and from squads. The arthrokinematic data was evaluated and a score was established.
26 men and 14 women (age 29,9± 10,1 yrs.) participated. 23 out of the 40 patients could take part in the test before the surgery. 29 of the patients were treated with a patellar tendon autograft (13 with pressfit- technique, 16 by bioscrew- fixation), 11 patients with semitendinosus autograft. A control group (six women, four men; 26,0± 2,9 yrs.) also participated in these tests.
The different surgery techniques showed different patterns in the knee kinematics. When comparing scores of the two autograft groups the patellar group showed slightly better results three and six months after surgery. The scores of the „healthy“ knee three months after surgery showed a significant decrease due to a protection of the injured knee. Reasons therefore can be found in a different motion pattern, an altered sensomotoric feedback, and a loss of proprioceptive afferences.
All in all the scores of the patients did not reach the results of the control group six months after surgery and differed in many parameters. The collected data indicates that both knees of the patients do not match a „normal“ kinematic knee pattern six months after surgery.