Biomechanical Mechanism of the Change of the Gait Touch Information After ACL Rupture

Study Overview
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Brief Summary
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High incidence rate of knee osteoarthritis and gait analysis are important for early assessment of biomechanics. ACL injury is an ideal clinical model for studying knee osteoarthritis. To clarify the mechanism between the biomechanical status of knee joint and the change of gait touch information, and to provide scientific basis for quantifying and evaluating the biomechanical status of knee joint in dynamic load-bearing state.

Detailed Description
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The purpose of this study is to identify the characteristics of the disease, diagnose the disease by computer and evaluate the rehabilitation based on gait touch information after ACL rupture and reconstruction, combined with the methods of multi-body dynamics, machine learning and biomechanics analysis. Methods: 55 healthy volunteers, 55 patients with ACL rupture were recruited. Three dimensional gait analysis and dynamic plantar pressure were used to test the kinematic and dynamic data of lower limbs and gait touch information when walking, jogging, stopping and jumping, and running side cutting. Outcome evaluation indexes and statistical methods: the following indexes were measured repeatedly by two factor ANOVA method, and the left and right sides and different rehabilitation time were used as the variables of repeated measurement: the biomechanics of the lower limb joint and the change of the biological characteristics of gait touch information were analyzed. To study the biomechanical status of different knee joints and the mechanism of the change of gait touch information. Finally, based on the information of gait touch, a biomechanical evaluation model of knee joint during walking or jogging is established, which provides the exact basis for quantifying and evaluating the biomechanical state of knee joint under the dynamic load-bearing state of gait touch information.

Official Title
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Biomechanical Mechanism of the Change of the Gait Touch Information After ACL Rupture

Conditions
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Anterior Cruciate Ligament Injuries

Intervention / Treatment
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* Other: no intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18-35 years old Patients who have isolated ACL injury and receive ACL reconstruction surgery at Peking University Third Hospital. With isolated ACL injury (an ACL injury with no need for surgical repairs to other knee structures). All participants have no known disorders or diseases other than ACL rupture. Exclusion Criteria: Cognitive impairment Other injuries affecting movement performance.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Anterior Cruciate Ligament injury and reconstruction group<br>According to the previous clinical diagnosis, patients who has suffered the Anterior Cruciate Ligament injury. | Other: no intervention<br>* This is an observation study, with no intervention<br>|
| normal control group<br>According to the previous clinical diagnosis, volunteers who has never suffered the lower extremity sports injuries. | Other: no intervention<br>* This is an observation study, with no intervention<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| walking speed | Three-dimensional gait analysis system and plantar pressure were used during walking, jogging, cutting and jumping. | On the day of enrollment. | 
| ground reaction force | Three-dimensional gait analysis system and plantar pressure were used during walking, jogging, cutting and jumping. | On the day of enrollment. | 
| knee flexion angle | Three-dimensional gait analysis system and plantar pressure were used during walking, jogging, cutting and jumping. | On the day of enrollment. | 
| the moment of knee extension in the gait cycle | Three-dimensional gait analysis system and plantar pressure were used during walking, jogging, cutting and jumping. | On the day of enrollment. | 
| the moment of knee flexion in the gait cycle | Three-dimensional gait analysis system and plantar pressure were used during walking, jogging, cutting and jumping. | On the day of enrollment. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The International Knee Documentation Committee (IKDC) score | The International Knee Documentation Committee (IKDC) score was used to evaluate the knee health.The patients completed score by themselves. The lowest score is 0 and the highest score is 100. The higher is better. | On the day of enrollment. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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anterior cruciate ligament, gait analysis, plantar pressure, multi-body dynamics modeling