Gait analysis in the patients with knee ligament injury

Abstract

INTRODUCTION: Chronic anterior cruicate ligament (ACL) deficiency change normal gate. OBJECTIVES: The aim of this study was to present more accurate system (Avatar system) for gait analysis on patients with knee ligament apparatus injury before and after operation of ACL reconstruction. METHODS: In this study were include 15 male patients with ACL tear of the knee, without concomitant injury of the ipsylateral lower leg. The movement curves are being obtained on the basis of the markers placed on the patient's recorded movements is enabled by using the reconstructed models of the femur and tibia and by curves of movement. The bone reconstruction is based on MRI scans and Hounsfield index. Generated polygonal models are optimized in order to obtain movement of the tibia nd femur provides us with quite simplified and accurate translation of one bone into the other. RESULTS Average translation of the tibia into the femur on the healthy knee was 8mm, and on the knee with chronic anterior crutiat ligament deficiency 15.8mm. Average translation of the tibia into the femur after ACL reconstruction was 9.1mm. CONCLUSION: The results obtained in this research reveal that the more precise diagnosis of the ligament instability can be set. The results also indicate significant decrease of the tibial translation and rotation after ACL reconstruction.