Abstract
At present, there few studies on the kinematic features of lateral discoid meniscus injury. In this study, a motion capture system was used to investigate the motion characteristics of knees with lateral discoid meniscus after injury, and the differences between the knees with lateral meniscus and intact knees were compared. Fourteen patients diagnosed with unilateral lateral discoid meniscus injury, fourteen patients diagnosed with unilateral lateral meniscus injury, and fourteen normal subjects with healthy knees were recruited and grouped. Through kinematic gait analysis, it was found that the subjects in the two groups with meniscus injuries exhibited significantly smaller ranges of rotation and translation than those with healthy knees on the sagittal, coronal, and horizontal planes, but not in proximal-distal translation. Maximum lateral tibial translation and maximum internal tibial rotation in the knees with lateral discoid meniscus injury were significantly decreased compared to those with lateral meniscus injury. The results show that the kinematic features of knees with lateral discoid meniscus injury are statistically different than those of healthy knees and knees with lateral meniscus injury. This study provides an important reference for the dynamic function of knees with lateral discoid meniscus injury.
Highlights
The term “discoid meniscus” is considered to be synonymous with “snapping knee syndrome”
Among patients with injured meniscus in the lateral compartment, there were no significant differences in range of motion (ROM) (Table 1)
This study explores the kinematic characteristics of knees with lateral meniscus injury and lateral discoid meniscus injury, as well as those of healthy knees, using a portable optical tracking system
Summary
The term “discoid meniscus” is considered to be synonymous with “snapping knee syndrome”. Traditional motion capture systems have already been used to evaluate the functional motion of the knees on patients with anterior cruciate ligament (ACL) deficiency in clinical studies[13,14,15,16]. Capturing techniques enable researchers to accurately quantify three-dimensional bone motion during dynamic activities without soft tissue artifact (STA) This technology only enables constrained motion patterns to be investigated due to its limited field-of-view. The kinematic characteristics of patients with injured lateral discoid meniscus were investigated using a portable infrared motion capture system. This study focused on detecting the gait characteristics of patients with injured lateral discoid meniscus based on infrared navigation technology and comparing the differences among knees with injured lateral discoid meniscus and injured lateral meniscus and healthy ones
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