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Maryam Jalali, Farzam Farahmand, Fateme Esfandiarpour, Seyed Ali Golestanha, Mohammad Akbar, Amirhosein Eskandari, Seyed Ebrahim Mousavi
BACKGROUND: Functional knee braces are extensively used for partially and completely torn anterior cruciate ligament (ACL) patients and those who have undergone ACL graft reconstruction, in order to support the healing ACL, improve the joint's functional stability, and restore the normal joint kinematics. RESEARCH QUESTION: Does wearing braces alter the arthrokinematics of the ACL deficient knees during lung exercise? METHODS: For ten male unilateral ACL deficient subjects, 3D knee models were reconstructed from CT images, acquired in rest position...
April 22, 2018: Gait & Posture
A L Garcia-Garcia, M Alvarez-Vera, L A Montoya-Santiyanes, I Dominguez-Lopez, J L Montes-Seguedo, J C Sosa-Savedra, J D O Barceinas-Sanchez
Friction is the natural response of all tribosystems. In a total knee replacement (TKR) prosthetic device, its measurement is hindered by the complex geometry of its integrating parts and that of the testing simulation rig operating under the ISO 14243-3:2014 standard. To develop prediction models of the coefficient of friction (COF) between AISI 316L steel and ultra-high molecular weight polyethylene (UHMWPE) lubricated with fetal bovine serum dilutions, the arthrokinematics and loading conditions prescribed by the ISO 142433: 2014 standard were translated to a simpler geometrical setup, via Hertz contact theory...
June 2018: Journal of the Mechanical Behavior of Biomedical Materials
Chen Yang, Yasutaka Tashiro, Andrew Lynch, Freddie Fu, William Anderst
PURPOSE: To analyze the in vivo kinematics and arthrokinematics of chronic ACL-deficient (ACL-D) and unaffected contralateral knees during level walking and downhill running using dynamic biplane radiography. It was hypothesized that ACL-D knees would demonstrate increased anterior translation and internal rotation, and that ACL-deficiency would alter the tibiofemoral contact paths in comparison to the unaffected contralateral side. METHODS: Eight participants with unilateral chronic ACL-D without instability symptoms were recruited...
May 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Liying Zheng, Robert Carey, Eric Thorhauer, Scott Tashman, Christopher Harner, Xudong Zhang
We investigated the effects of isolated meniscectomy on tibiofemoral skeletal kinematics and cartilage contact arthrokinematics in vivo. We recruited nine patients who had undergone isolated medial or lateral meniscectomy, and used a dynamic stereo-radiography (DSX) system to image the patients' knee motion during decline walking. A volumetric model-based tracking process determined 3D tibiofemoral kinematics from the recorded DSX images. Cartilage contact arthrokinematics was derived from the intersection between tibial and femoral cartilage models co-registered to the bones...
January 2018: Medical Engineering & Physics
Braden Gammon, Emily Lalone, Masao Nishiwaki, Ryan Willing, James Johnson, Graham J W King
PURPOSE: Current techniques used to measure joint contact rely on invasive procedures and are limited to statically loaded positions. We sought to examine native distal radioulnar joint (DRUJ) contact mechanics using nondestructive imaging methods during simulated active and passive forearm rotation. METHODS: Testing was performed using 8 fresh-frozen cadaveric specimens that were surgically prepared by isolating muscles involved in forearm rotation. A wrist simulator allowed for the evaluation of differences between active and passive forearm rotation...
March 2018: Journal of Hand Surgery
Patrick Holweg, Wolfgang Pichler, Gerald Gruber, Ellen Tackner, Franz Josef Seibert, Patrick Sadoghi, Gloria Hohenberger
Various surgical techniques have been described for the fixation of acromioclavicular (AC) dislocations. However, recurrent dislocation is one of the main complications associated with the majority of these techniques. We report a case of postoperative AC joint redislocation. In order to overcome recurrent dislocation after revision surgery, a reconstruction of the conoid and trapezoid ligament with the use of a free tendon graft in combination with a FiberTape was provided within a novel surgical technique...
2017: Case Reports in Medicine
Amirhesam Amerinatanzi, Rodney Summers, Kaveh Ahmadi, Vijay K Goel, Timothy E Hewett, Edward Nyman
BACKGROUND: The proximal tibia is geometrically complex, asymmetrical, and variable, is heavily implicated in arthrokinematics of the knee joint, and thus a contributor to knee pathologies such as non-contact anterior cruciate ligament injury. Medial, lateral, and coronal tibial slopes are anatomic parameters that may increase predisposition to knee injuries, but the extent to which each contributes has yet to be fully realized. Previously, two-dimensional methods have quantified tibial slopes, but more reliable 3D methods may prove advantageous...
March 2017: Knee
James M May, Alan Nasypany, Julie Paolino, Russell Baker, Jeffrey Seegmiller
CONTEXT: While the incidence and reinjury rates of lateral ankle sprain (LAS) continue to persist at high rates across many sporting activities, further exploration of assessment and treatment beyond the traditional ligamentous and strength/proprioceptive model is warranted. Further, assessing and treating both arthrokinematic and osteokinematic changes associated with LAS can provide insight into a more diverse approach to treating ankle pathology. OBJECTIVE: To examine the clinical use of the Mulligan Concept mobilization with movement (MWM) while treating patients diagnosed with an acute grade I or II LAS through authentic patient care...
November 2017: Journal of Sport Rehabilitation
Farzin Halabchi, Hooman Angoorani, Maryam Mirshahi, Mohammad Hosein Pourgharib Shahi, Mohammad Ali Mansournia
BACKGROUND: Lateral ankle sprains (LAS) are among the most common sports- related injuries and the reinjury rate is very high. OBJECTIVES: This study aimed to evaluate the prevalence of some intrinsic risk factors among professional football and basketball players with or without history of acute or recurrent ankle sprain. PATIENTS AND METHODS: One hundred and six professional football and basketball players who were referred for pre-participation examinations were recruited in this study...
September 2016: Asian Journal of Sports Medicine
Dawid Bączkowicz, Krzysztof Falkowski, Edyta Majorczyk
Study Design Controlled laboratory study, cross-sectional. Background Lateral ankle sprains are among the most common injuries encountered during athletic participation. Following the initial injury, there is an alarmingly high risk of reinjury and development of chronic ankle instability (CAI), which is dependent on a combination of factors, including sensorimotor deficits and changes in the biomechanical environment of the ankle joint. Objective To evaluate CAI-related disturbances in arthrokinematic motion quality and postural control and the relationships between them...
August 2017: Journal of Orthopaedic and Sports Physical Therapy
J D O Barceinas-Sanchez, M Alvarez-Vera, L A Montoya-Santiyanes, I Dominguez-Lopez, A L Garcia-Garcia
The observation of tribological phenomena occurring in total knee replacement (TKR) simulators may be obscured by the intrinsic complexity of their operation: the dynamics and kinematics prescribed by the ISO 14243-3:2014 standard, and the geometry of the surfaces involved. On the other hand, evaluating the individual performance of the tribosystem elements may be carried out in simpler apparatuses. An experimental method is presented here, by means of which the arthrokinematics and loading conditions prescribed by the said standard are adapted to a ball-on-disc configuration in order to observe the behavior of the coefficient of friction along an entire walking cycle, using the contact point of an AISI 316L stainless steel ball rolling/sliding on an ultra-high molecular weight polyethylene (UHMWPE) disc, lubricated by a solution of fetal bovine serum, at 37°C...
January 2017: Journal of the Mechanical Behavior of Biomedical Materials
Angel Zeininger, Biren A Patel, Bernhard Zipfel, Kristian J Carlson
Australopithecus africanus has been interpreted as having a rigid lateral foot. One mechanism contributing to a rigid foot during push-off in humans is a calcaneocuboid joint (CCJ) with limited dorsiflexion and a "close-packed" talocalcaneal joint (TCJ). In contrast, apes likely have a greater CCJ range of motion and lack a close-packed TCJ. Differences in tarsal arthrokinematics may result in different joint loading environments. In Homo sapiens, we tested the hypothesis that dorsal and plantar CCJ and the TCJ show evidence of predictable habitual loading...
August 2016: Journal of Human Evolution
Dustin A Bruening, Timothy E Cooney, Matthew S Ray, Gregory A Daut, Kevin M Cooney, Stephanie M Galey
BACKGROUND: Foot and ankle movement alterations following ankle arthrodesis are still not well understood, particularly those that might contribute to the documented increase in adjacent joint arthritis. Generalized tarsal hypermobility has long been postulated, but not confirmed in gait or functional movements. The purpose of this study was to more thoroughly evaluate compensation mechanisms used by arthrodesis patients during level and uphill gait through a variety of measurement modalities and a detailed breakdown of gait phases...
October 2016: Foot & Ankle International
Joyce Sabari, Mary Shea, Linda Chen, Alyssa Laurenceau, Evan Leung
Wheelchair users are at high risk for developing repetitive stress injuries (RSI) of the cervical spine and glenohumeral joints due to increased demands on active range of motion (AROM) when performing functional tasks from a seated position. The addition of a seat elevation device may alleviate the risk factors that lead to the development of RSI. However, there are no studies which establish that wheelchair seat height impacts upon arthrokinematic requirements at vulnerable joints. Additionally, Medicare and most insurance carriers do not cover the cost of power seat elevators because this feature has not been shown to be a "medical necessity...
2016: Assistive Technology: the Official Journal of RESNA
Akira Kogure, Kazuhiko Kotani, Shigehiko Katada, Hiroshi Takagi, Masahiro Kamikozuru, Takashi Isaji, Setsuo Hakata
STUDY DESIGN: Cized, single-blind, controlled trial. OBJECTIVE: To investigate the efficacy of the Arthrokinematic approach (AKA)-Hakata (H) method for chronic low back pain. SUMMARY OF BACKGROUND DATA: The AKA-H method is used to manually treat abnormalities of intra-articular movement. METHODS: One hundred eighty-six patients with chronic nonspecific low back pain randomly received either the AKA-H method (AKA-H group) or the sham technique (S group) monthly for 6 months...
2015: PloS One
William Anderst
Arthrodesis is the standard of care for numerous pathologic conditions of the cervical spine and is performed over 150,000 times annually in the United States. The primary long-term concern after this surgery is adjacent segment disease (ASD), defined as new clinical symptoms adjacent to a previous fusion. The incidence of adjacent segment disease is approximately 3% per year, meaning that within 10 years of the initial surgery, approximately 25% of cervical arthrodesis patients require a second procedure to address symptomatic adjacent segment degeneration...
January 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Fabien Dal Maso, Maxime Raison, Arne Lundberg, Anton Arndt, Paul Allard, Mickaël Begon
BACKGROUND: Glenohumeral translations have been mainly investigated during static poses while shoulder rehabilitation exercises, activities of daily living, and sports activities are dynamic. Our objective was to assess glenohumeral translations during shoulder rehabilitation exercises, activities of daily living, and sports activities to provide a preliminary analysis of glenohumeral arthrokinematics in a broad range of dynamic tasks. METHODS: Glenohumeral translations were computed from trajectories of markers fitted to intracortical pins inserted into the scapula and the humerus...
November 2015: Clinical Biomechanics
Ashley L Kapron, Stephen K Aoki, Christopher L Peters, Andrew E Anderson
Visualization of hip articulation relative to the underlying anatomy (i.e., arthrokinematics) is required to understand hip dysfunction in femoroacetabular (FAI) patients. In this exploratory study, we quantified in-vivo arthrokinematics of a small cohort of asymptomatic volunteers and three symptomatic patients with varying FAI deformities during the passive impingement, FABER, and rotational profile exams using dual fluoroscopy and model-based tracking. Joint angles, joint translations, and relative pelvic angles were calculated...
August 20, 2015: Journal of Biomechanics
Bibo Wang, Koren E Roach, Ashley L Kapron, Niccolo M Fiorentino, Charles L Saltzman, Madeline Singer, Andrew E Anderson
The relationship between altered tibiotalar and subtalar kinematics and development of ankle osteoarthritis is unknown, as skin marker motion analysis cannot measure articulations of each joint independently. Here, we quantified the accuracy and demonstrated the feasibility of high-speed dual fluoroscopy (DF) to measure and visualize the three-dimensional articulation (i.e., arthrokinematics) of the tibiotalar and subtalar joints. Metal beads were implanted in the tibia, talus and calcaneus of two cadavers...
May 2015: Gait & Posture
Derek D Lichti, Gulshan B Sharma, Gregor Kuntze, Braden Mund, Jillian E Beveridge, Janet L Ronsky
High-speed dual fluoroscopy is a noninvasive imaging technology for three-dimensional skeletal kinematics analysis that finds numerous biomechanical applications. Accurate reconstruction of bone translations and rotations from dual-fluoroscopic data requires accurate calibration of the imaging geometry and the many imaging distortions that corrupt the data. Direct linear transformation methods are commonly applied for performing calibration using a two-step process that suffers from a number of potential shortcomings including that each X-ray source and corresponding camera must be calibrated separately...
February 2015: IEEE Transactions on Medical Imaging
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