...Swithin S. Razu; Hamidreza Jahandar; Andrew Zhu; Erin E. Berube; Joseph E. Manzi; Andrew D. Pearle; Danyal H. Nawabi; Thomas L. Wickiewicz; Thomas J. Santner; Carl W. Imhauser High-grade knee laxity is associated with early anterior cruciate ligament (ACL) graft failure, poor function...

...James P. Charles; Freddie H. Fu; William J. Anderst In vivo knee ligament forces are important to consider for informing rehabilitation or clinical interventions. However, they are difficult to directly measure during functional activities. Musculoskeletal models and simulations have become...

... positive A – P shear strain emerged on the medial plateau corresponding to the shifting knee flexion and axial rotation (Fig. 6( d ) and Table 1 ). A small medial defect disturbed the large region of M – L shear strains on the medial plateau compared to healthy cartilage (Fig. 7( c ) ), whereas...

... 03 10 2013 11 10 2013 Multiple computational models have been developed to study knee biomechanics. However, the majority of these models are mainly validated against a limited range of loading conditions and/or do not include sufficient details of the critical anatomical structures...

... of Three-Dimensional Motions: Application to the Knee,” ASME J. Biomech. Eng., 105 (2), pp. 136–144) and Fujie et al. (1996, “Forces and Moment in Six-DOF at the Human Knee Joint: Mathematical Description for Control,” Journal of Biomechanics, 29 (12), pp. 1577–1585) on the knee joint. It is also shown...

...Safa T. Herfat; Daniel V. Boguszewski; Rebecca J. Nesbitt; Jason T. Shearn Current surgical treatments for common knee injuries do not restore the normal biomechanics. Among other factors, the abnormal biomechanics increases the susceptibility to the early onset of osteoarthritis. In pursuit...

... that exhibited a higher degree of position and path repeatability yielded lower variability in the resultant forces at the knee ( 6 ). There are several factors in the system that contribute to the overall accuracy. Some of these are inherent in the manipulator design while others can be controlled...

.... In this validation study, a robotic testing system was used to apply an external load on a cadaveric knee specimen and to measure the corresponding ACL force as the gold standard. These force values were compared with those estimated by the method introduced in this study. The magnitude and direction of the forces...

...Eric G. Meyer; Timothy G. Baumer; Roger C. Haut Knee hyperextension has been described as a mechanism of isolated anterior cruciate ligament (ACL) tears, but clinical and experimental studies have produced contradictory results for the ligament injuries and the injury sequence caused...

... is to present a method to express any 3D vector in a nonorthogonal coordinate system. The interpretation of these expressions in the JCS is clarified and an example for the 3D joint moment vector at the shoulder and the knee is given. A nonorthogonal projection method is proposed based on the mixed product...

..., and (3) demonstrate the simulator’s usefulness for specific applications of the foot-ankle complex and knee. The musculoskeletal simulator allows researchers to simulate a variety of loading conditions on cadaver joints via motorized actuators that simulate muscle forces while simultaneously contacting...

... degeneration. A short-term method for evaluating whether degenerative arthritis can be prevented or not would be to determine if the peak pressure and contact area coverage of the tibial plateau (TP) in the knee are restored at the time of implantation. Although several published studies already utilized TP...

... al. (1993, “The Axes of Rotation of the Knee,” Clin. Orthop. Relat. Res., 290, pp. 259–268 ) identified the two fixed axes but the visual-based alignment introduced errors in the method. Therefore, the objectives were to develop and validate a new axis finding method to identify the LR and FE axes...

...Michael J. Koehle; M. L. Hull The usefulness of forward dynamic simulations to studies of human motion is well known. Although the musculoskeletal models used in these studies are generic, the modeling of specific components, such as the knee joint, may vary. Our two objectives were (1...

... the application of a 30 N anterior tare force) before the graft force reaches zero. Markers were injected into the tibia, femur, and graft in six cadaveric legs whose knees were reconstructed with single-loop tibialis grafts. To satisfy the first objective, legs were subjected to 1500 cycles at 1 4 Hz of 150 N...

...Ryan A. Howard; Joshua M. Rosvold; Shon P. Darcy; David T. Corr; Nigel G. Shrive; Janet E. Tapper; Janet L. Ronsky; Jillian E. Beveridge; Linda L. Marchuk; Cyril B. Frank Although alterations in knee joint loading resulting from injury have been shown to influence the development of osteoarthritis...

... (1) to develop a magnetic resonance imaging (MRI)-based alignment method for use with apparatuses applying tibiofemoral joint compression, (2) to demonstrate the usefulness of the method by aligning cadaveric knees in an apparatus that could apply tibiofemoral joint compression, and (3) to quantify...

...Trevor J. Lujan; Michelle S. Dalton; Brent M. Thompson; Benjamin J. Ellis; Jeffrey A. Weiss The knee joint is partially stabilized by the interaction of multiple ligament structures. This study tested the interdependent functions of the anterior cruciate ligament (ACL) and the medial collateral...

... 0.19 0.09 1.30 1.22 0.54 Average 0.16 mm 0.14 mm 0.11 mm 1.71° 0.90° 0.40° 5 Knee translation vs. time for a typical dog (Dog 1). Translations are of the tibia relative to the femur (from ACL origin to insertion), expressed in the tibial anatomical coordinate...

... and functional stability of the knee has not been well documented, in part because of diagnostic difficulties. A computer model of the knee in the sagittal plane was used in this study to simulate tests using the KT-2000 Knee Arthrometer, which quantifies Lachman’s test for ACL injury. A variety of partial ACL...