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Tserenchimed Purevsuren,Batbayar Khuyagbaatar,SuKyoung Lee,Yoon Hyuk Kim 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.2
For golf swing, the soft tissue structure resisting joint compression and internal rotation of the knee at low flexion angle may be susceptible for a lead knee injury. Therefore, anterior cruciate ligament (ACL) rupture is one of the potential injuries that may occur from repeated stress during golf. The current study was purposed to investigate the biomechanical factors that lead to high ACL load in the lead knee during golf swing. The joint kinematic data of the lead leg and trunk, joint kinetic data of the lead knee, ground reaction force, and the external knee moments were compared between the low and high ACL loading groups. The results demonstrated an increased amount of frontal plane moment arm and external knee adduction (varus) moment just after ball impact for the high ACL loading group. These observations were associated with a characteristic difference in the upper body motion and were the main contributors to the elevated ACL force of the lead knee. The mechanism that generates a high amount of ACL loading during golf swing, which involves the application of external knee adduction moment just after ball impact, may differ from conventional non-contact ACL injury mechanisms that associated with dynamic valgus loading during injury circumstance.
Tserenchimed Purevsuren,Batbayar Khuyagbaatar,김경수,김윤혁 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.7
Joint loading, such as join forces and moments, needs to be investigated as fundamental information for prediction and analysis of skating-related musculoskeletal injuries. However, there is a lack of previous biomechanical studies due to technical difficulties in measuring three-dimensional motion data and ground reaction force data in the ice rink. A wearable motion analysis system with inertial sensors and in-shoe pressure sensors was recently developed. In this study, the knee joint kinematics and kinetics during shorttrack speed skating were investigated based on the data obtained from the wearable motion analysis system. The magnitudes of the estimated joint force and moment results were compared with those in the side-step cutting motion, in which non-contact anterior cruciate ligament (ACL) injury is common. The result indicates that the knee valgus moments in the gliding phase and push-off phase were similar to that in the side-step cutting motion. The knee internal rotational moment during the gliding phase and push-off phase were much higher than that measured during side-step cutting. It is necessary to note the high internal rotational moments during the skating in order to prevent any possibility of ACL injury.
Fatigue injury risk in anterior cruciate ligament of target side knee during golf swing
Purevsuren, Tserenchimed,Kwon, Moon Seok,Park, Won Man,Kim, Kyungsoo,Jang, Seung Ho,Lim, Young-Tae,Kim, Yoon Hyuk Elsevier 2017 Journal of biomechanics Vol.53 No.-
<P><B>Abstract</B></P> <P>A golf-related ACL injury can be linked with excessive golf play or practice because such over-use by repetitive golf swing motions can increase damage accumulation to the ACL bundles. In this study, joint angular rotations, forces, and moments, as well as the forces and strains on the ACL of the target-side knee joint, were investigated for ten professional golfers using the multi-body lower extremity model. The fatigue life of the ACL was also predicted by assuming the estimated ACL force as a cyclic load. The ACL force and strain reached their maximum values within a short time just after ball-impact in the follow-through phase. The smaller knee flexion, higher internal tibial rotation, increase of the joint compressive force and knee abduction moment in the follow-through phase were shown as to lead an increased ACL loading. The number of cycles to fatigue failure (fatigue life) in the ACL might be several thousands. It is suggested that the excessive training or practice of swing motion without enough rest may be one of factors to lead to damage or injury in the ACL by the fatigue failure. The present technology can provide fundamental information to understand and prevent the ACL injury for golf players.</P>
Tserenchimed Purevsuren,김경수,나경욱,김윤혁 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.10
The main principle of open-wedge high tibial osteotomy (HTO) is to shift the weight-bearing line of the knee joint in order to decompress the degenerated compartment and delay osteoarthritis (OA). In this study, the resultant contact forces on the medial compartment, lateral compartment, and total tibiofemoral joint were analyzed during gait for five OA patients before and after HTO in order to fully understand the effect and mechanism of HTO for the OA knee. The compressive, lateral-medial shear, and anteriorposterior shear force components of the joint force, as well as the ratio of the medial contact force to the lateral contact force, were investigated using inverse dynamic and multi-body dynamic models. Medial open-wedge HTO improved the balance of medial and lateral contact forces on the tibiofemoral joint, which demonstrated the purpose of HTO provided by clinical studies and the outcomes of a computational study. In addition to the compressive contact force, the lateral-medial shear force was also reduced during the stance phase of walking after HTO. The technology in this study provides a fundamental tool to evaluate the outcomes of HTO by considering daily and sports activities.
Dynamic simulation of tibial tuberosity realignment: model evaluation.
Purevsuren, Tserenchimed,Elias, John J,Kim, Kyungsoo,Kim, Yoon Hyuk Gordon and Breach Science Publishers 2015 Computer methods in biomechanics and biomedical en Vol.18 No.14
<P>This study was performed to evaluate a dynamic multibody model developed to characterize the influence of tibial tuberosity realignment procedures on patellofemoral motion and loading. Computational models were created to represent four knees previously tested at 40, 60, and 80 of flexion with the tibial tuberosity in a lateral, medial and anteromedial positions. The experimentally loaded muscles, major ligaments of the knee, and patellar tendon were represented. A repeated measures ANOVA with post-hoc testing was performed at each flexion angle to compare data between the three positions of the tibial tuberosity. Significant experimental trends for decreased patella flexion due to tuberosity anteriorization and a decrease in the lateral contact force due to tuberosity medialization were reproduced computationally. The dynamic multibody modeling technique will allow simulation of function for symptomatic knees to identify optimal surgical treatment methods based on parameters related to knee pathology and pre-operative kinematics.</P>
Tserenchimed Purevsuren,Myagmarbayar Batbaatar,김경수,박원만,장승호,김윤혁 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.7
In order to clearly understand the injury mechanism of the Lateral ankle sprain (LAS), we purposed to evaluate the ligament strains in the human ankle joint during the real accidental events of LAS. Three different accidental ankle sprain cases were selected based on their reported motions, which are rarely captured under laboratory settings. The ligament strains were investigated using a computational ankle joint model based on the kinematic data from these case reports. Our result revealed that the excessive ankle inversion coupled with slight internal rotation could lead to LAS. Therefore, the ankle inversion and internal rotation should be primarily considered in LAS studies. This study quantitatively contributes to our understanding of the LAS mechanism in sport and clinical research.
Purevsuren, Tserenchimed,Dorj, Ariunzaya,Kim, Kyungsoo,Kim, Yoon Hyuk SAGE Publications 2016 Proceedings of the Institution of Mechanical Engin Vol.230 No.4
<P>The computational modeling approach has commonly been used to predict knee joint contact forces, muscle forces, and ligament loads during activities of daily living. Knowledge of these forces has several potential applications, for example, within design of equipment to protect the knee joint from injury and to plan adequate rehabilitation protocols, although clinical applications of computational models are still evolving and one of the limiting factors is model validation. The objective of this study was to extend previous modeling technique and to improve the validity of the model prediction using publicly available data set of the fifth Grand Challenge Competition to Predict In Vivo Knee Loads. A two-stage modeling approach, which combines conventional inverse dynamic analysis (the first stage) with a multi-body subject-specific lower limb model (the second stage), was used to calculate medial and lateral compartment contact forces. The validation was performed by direct comparison of model predictions and experimental measurement of medial and lateral compartment contact forces during normal and turning gait. The model predictions of both medial and lateral contact forces showed strong correlations with experimental measurements in normal gait (r=0.75 and 0.71) and in turning gait trials (r=0.86 and 0.72), even though the current technique over-estimated medial compartment contact forces in swing phase. The correlation coefficient, Sprague and Geers metrics, and root mean squared error indicated that the lateral contact forces were predicted better than medial contact forces in comparison with the experimental measurements during both normal and turning gait trials.</P>