scholarly journals High-speed video capture of anterior cruciate ligament tearing in human and porcine ex vivo specimens

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Smith DT ◽  
Cook SL ◽  
Gillespie MA ◽  
Stevens KA ◽  
Reynolds HC ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
High Speed ◽  
Ex Vivo ◽  
Cruciate Ligament ◽  
Video Capture ◽  
High Speed Video ◽  
Anterior Cruciate

scholarly journals Rehabilitation and Return to Sport Assessment after Anterior Cruciate Ligament Injury: Quantifying Joint Kinematics during Complex High-Speed Tasks through Wearable Sensors

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2331
Author(s):  
Stefano Di Paolo ◽  
Nicola Francesco Lopomo ◽  
Francesco Della Villa ◽  
Gabriele Paolini ◽  
Giulio Figari ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Excellent Agreement ◽  
High Speed ◽  
Cruciate Ligament ◽  
Wearable Sensors ◽  
Return To Sport ◽  
Acl Injury ◽  
Wearable Sensor ◽  
Anterior Cruciate ◽  
Full Body

The aim of the present study was to quantify joint kinematics through a wearable sensor system in multidirectional high-speed complex movements used in a protocol for rehabilitation and return to sport assessment after Anterior Cruciate Ligament (ACL) injury, and to validate it against a gold standard optoelectronic marker-based system. Thirty-four healthy athletes were evaluated through a full-body wearable sensor (MTw Awinda, Xsens) and a marker-based optoelectronic (Vicon Nexus, Vicon) system during the execution of three tasks: drop jump, forward sprint, and 90° change of direction. Clinically relevant joint angles of lower limbs and trunk were compared through Pearson’s correlation coefficient (r), and the Coefficient of Multiple Correlation (CMC). An excellent agreement (r > 0.94, CMC > 0.96) was found for knee and hip sagittal plane kinematics in all the movements. A fair-to-excellent agreement was found for frontal (r 0.55–0.96, CMC 0.63–0.96) and transverse (r 0.45–0.84, CMC 0.59–0.90) plane kinematics. Movement complexity slightly affected the agreement between the systems. The system based on wearable sensors showed fair-to-excellent concurrent validity in the evaluation of the specific joint parameters commonly used in rehabilitation and return to sport assessment after ACL injury for complex movements. The ACL professionals could benefit from full-body wearable technology in the on-field rehabilitation of athletes.

scholarly journals High-resolution MRI and micro-CT in an ex vivo rabbit anterior cruciate ligament transection model of osteoarthritis

2004 ◽  
Vol 12 (8) ◽  
pp. 614-626 ◽  
Author(s):  
Danika L. Batiste ◽  
Alexandra Kirkley ◽  
Sheila Laverty ◽  
Lisa M.F. Thain ◽  
Alison R. Spouge ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
High Resolution ◽  
Ex Vivo ◽  
Cruciate Ligament ◽  
Micro Ct ◽  
Anterior Cruciate Ligament Transection ◽  
High Resolution Mri ◽  
Anterior Cruciate

scholarly journals Anterior Cruciate Ligament deficiency leads to early instability of scaffold for cartilage regeneration: a controlled laboratory ex-vivo study

2011 ◽  
Vol 36 (6) ◽  
pp. 1315-1320 ◽  
Author(s):  
Turgay Efe ◽  
Alexander Füglein ◽  
Alan Getgood ◽  
Thomas J. Heyse ◽  
Susanne Fuchs-Winkelmann ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Ex Vivo ◽  
Cruciate Ligament ◽  
Cartilage Regeneration ◽  
Anterior Cruciate Ligament Deficiency ◽  
Anterior Cruciate ◽  
Ex Vivo Study

scholarly journals In Vivo Anterior Cruciate Ligament Deformation During a Single-Legged Jump Measured by Magnetic Resonance Imaging and High-Speed Biplanar Radiography

2019 ◽  
Vol 47 (13) ◽  
pp. 3166-3172 ◽  
Author(s):  
Zoë A. Englander ◽  
Edward L. Baldwin ◽  
Wyatt A.R. Smith ◽  
William E. Garrett ◽  
Charles E. Spritzer ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Anterior Cruciate Ligament ◽  
High Speed ◽  
Cruciate Ligament ◽  
Resonance Imaging ◽  
Attachment Sites ◽  
Biplanar Radiographs ◽  
Anterior Cruciate ◽  
Insight Into

Background: The in vivo mechanics of the anterior cruciate ligament (ACL) and its bundles during dynamic activities are not completely understood. An improved understanding of how the ACL stabilizes the knee is likely to aid in the identification and prevention of injurious maneuvers. Purpose/Hypothesis: The purpose was to measure in vivo ACL strain during a single-legged jump through use of magnetic resonance imaging (MRI) and high-speed biplanar radiography. We hypothesized that ACL strain would increase with the knee near extension, and a peak in ACL strain would occur just before landing from the jump, potentially due to quadriceps contraction in anticipation of landing. Study Design: Descriptive laboratory study. Methods: Models of the femur, tibia, and ACL attachment sites of 8 male participants were generated from MRI scans through use of solid modeling. High-speed biplanar radiographs were obtained from these participants as they performed a single-legged jump. The bone models were registered to the biplanar radiographs, thereby reproducing the in vivo positions of the joint throughout the jump. ACL and bundle elongations were defined as the centroid to centroid distances between attachment sites for each knee position. ACL strain was defined as ACL length normalized to its length measured in the position of the knee at the time of MRI. Results: Peaks in ACL strain were observed before toe-off and 55 ± 35 milliseconds before initial ground contact. These peaks were associated with the knee positioned at low flexion angles. Mean ACL strain was inversely related to mean flexion angle (rho = −0.73, P < .001), such that ACL strain generally increased with knee extension throughout the jumping motion. ACL bundle lengths were significantly (rho > 0.85, P < .001) correlated with overall ACL length. Conclusion: These findings provide insight into how landing in extension can increase the risk of ACL injury. Specifically, this study shows that peak ACL strain can occur just before landing from a single-legged jump. Thus, when an individual lands on an extended knee, the ACL is relatively taut, which may make it particularly vulnerable to injury, especially in the presence of a movement perturbation or unanticipated change in landing strategy. Clinical Relevance: This study provides a novel measurement of dynamic ACL strain during an athletic maneuver and lends insight into how landing in extension can increase the likelihood of ACL failure.

Development of a Traumatic Anterior Cruciate Ligament and Meniscal Rupture Model With a Pilot In Vivo Study

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
Daniel I. Isaac ◽  
Eric G. Meyer ◽  
Roger C. Haut
Keyword(s):  
Anterior Cruciate Ligament ◽  
Bone Fracture ◽  
Ex Vivo ◽  
Cruciate Ligament ◽  
Experimental Studies ◽  
Joint Model ◽  
In Vivo Study ◽  
Joint Orientation ◽  
Anterior Cruciate

The current study describes the development of a small animal, closed-joint model of traumatic anterior cruciate ligament (ACL) and meniscal rupture. This model can be used in future studies to investigate the roles of these acute damages on the long-term health of an injured knee joint. Forty-two Flemish Giant rabbits received an insult to the left tibiofemoral joint ex vivo in order to document optimal energy and joint orientation needed to generate ACL and meniscal rupture, without gross fracture of bone. Impact energies ranged from 10 J to 22 J, and joint flexion angle ranged from 60 deg to 90 deg. Three in vivo animals were impacted at 13 J with the knee flexed at 90 deg, as this was determined to be the optimal load and joint orientation for ACL and meniscal ruptures, and sacrificed at 12 weeks. Impact data from the ex vivo group revealed that 13 J of dropped-mass energy, generating approximately 1100 N of load on the knee, would cause ACL and meniscal ruptures, without gross bone fracture. Acute damage to the lateral and medial menisci was documented in numerous ex vivo specimens, with isolated lateral meniscal tears being more frequent than isolated medial tears in other cases. The in vivo animals showed no signs of ill health or other physical complications. At 12 week post-trauma these animals displayed marked degeneration of the traumatized joint including synovitis, cartilage erosion, and the formation of peripheral osteophytes. Histological microcracks at the calcified cartilage-subchondral bone interface were also evident in histological sections of these animals. A closed-joint model of traumatic ACL and meniscal rupture was produced, without gross bone fracture, and a pilot, in vivo study showed progressive joint degeneration without any other noticeable physical impairments of the animals over 12 weeks. This closed-joint, traumatic injury model may be useful in future experimental studies of joint disease and various intervention strategies.

scholarly journals RESEARCH ON STABILITY OF ATHLETE KNEE QULUS LIGTE RECONSTRUCTION

2021 ◽  
Vol 27 (8) ◽  
pp. 786-788
Author(s):  
Kuolin Zhang
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
High Speed ◽  
Cruciate Ligament ◽  
Acl Injury ◽  
Lower Limbs ◽  
Joint Stability ◽  
Level Of Evidence ◽  
Rehabilitation Training ◽  
Anterior Cruciate

ABSTRACT Introduction: ACL injury of the knee joint is common in sports. Due to the special characteristics of strong physical confrontation and high speed, basketball has a high risk of ACL injury. Objective: To investigate the stability of anterior cruciate ligament (ACL) reconstruction on knee injury in athletes. Methods: In the south, medical research selected 3 cases of unilateral injuries in men's basketball athletes with arthroscopic anterior cruciate ligament autogenous tendon revascularization. We started collecting and recording data of three players three days after rehabilitation training, at various stages in the process Results: At the end of rehabilitation training, 10 weeks after operation, the pain disappeared, the range of motion of the knee joint increased significantly, muscle atrophy of bilateral lower limbs diminished, knee joint stability improved, knee joint muscle strength of the affected leg strengthened, and the rehabilitation goal was basically accomplished. Conclusions: Early rehabilitation training can effectively restore the movement function of the patient's knee joint, improve the efficiency of rehabilitation and shorten the rehabilitation period, thus helping the injured individual recover from the injury and return to the game rapidly. Level of evidence II; Therapeutic studies - investigation of treatment results.

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