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https://www.readbyqxmd.com/read/28533596/the-ratio-of-medial-and-lateral-hamstring-muscle-thickness-does-not-correlate-with-the-lateral-tibial-rotation-angle-in-the-standing-position-in-healthy-young-adults
#1
Dong-Soo Lee, Sung-Dae Choung, Seung-Won Lee, Hye Rim Suh, Jae-Hoon Shim
[Purpose] To investigate the relationship between the lateral tibial rotation angle during knee joint flexion and the medial and lateral hamstring muscle thickness ratio during knee joint extension while resting, doing nothing, in upright standing position. The lateral tibial torsion is an important factor of orthopedic knee joint diseases as well as other weight bearing joint diseases such as osteoarthritis, meniscus syndrome, anterior cruciate ligament rupture, etc. [Subjects and Methods] Thirty healthy young adults participated in this study...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28532997/the-influence-of-varus-and-valgus-deviation-on-patellar-kinematics-in-healthy-knees-an-exploratory-cadaver-study
#2
Michael Worlicek, Benedikt Moser, Günther Maderbacher, Raphael Zentner, Florian Zeman, Joachim Grifka, Armin Keshmiri
BACKGROUND: Patellofemoral instability may lead to osteoarthritis, anterior knee pain, and patellar luxation. The purpose of this study was to conduct an exploratory investigation into the difference of patellar kinematics of healthy knees during extension/flexion cycles in neutral, varus and valgus alignment. METHODS: The three-dimensional patellar kinematics of 10 lower extremities of whole body cadavers were examined during passive motion, in neutral position, and under valgus and varus stress...
May 19, 2017: Knee
https://www.readbyqxmd.com/read/28532505/do-small-changes-in-rotation-affect-measurements-of-lower-extremity-limb-alignment
#3
Amir A Jamali, John P Meehan, Nathan M Moroski, Matthew J Anderson, Ramit Lamba, Carol Parise
BACKGROUND: The alignment of the lower extremity has important implications in the development of knee arthritis. The effect of incremental rotations of the limb on common parameters of alignment has not been studied. The purpose of the study was to (1) determine the standardized neutral position measurements of alignment and (2) determine the effect of rotation on commonly used measurements of alignment. METHODS: Eighty-seven full length CT angiography studies (49 males and 38 females, average age 66 years old) were included...
May 22, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28527386/gait-patterns-of-children-and-adolescents-with-charcot-marie-tooth-disease
#4
Elizabeth Wojciechowski, Amy Sman, Kayla Cornett, Jacqueline Raymond, Kathryn Refshauge, Manoj P Menezes, Joshua Burns
Gait abnormalities reported in childhood Charcot-Marie-Tooth disease (CMT) include foot-drop, reduced ankle power at push-off and increased knee and hip flexion for swing clearance ('steppage-gait'). The purpose of this study was to describe the gait patterns of 60 children aged 6-17 years with CMT (CMTall) and distinguish differences based on functional weakness using the CMT Pediatric Scale (CMTPedS). Data were captured using Vicon Nexus system and compared to 50 healthy norms. Data were subdivided into three groups denoting increasing severity of dorsiflexion and plantarflexion weakness from the CMTPedS: no difficulty heel or toe walking (CMTND), difficulty heel walking (CMTDH), difficulty toe and heel walking (CMTDTH)...
May 8, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28515970/two-dimensional-video-analysis-is-comparable-to-3d-motion-capture-in-lower-extremity-movement-assessment
#5
Stacy A Schurr, Ashley N Marshall, Jacob E Resch, Susan A Saliba
BACKGROUND: Although 3D motion capture is considered the "gold standard" for recording and analyzing kinematics, 2D video analysis may be a more reasonable, inexpensive, and portable option for kinematic assessment during pre-participation screenings. Few studies have compared quantitative measurements of lower extremity functional tasks between 2D and 3D. PURPOSE: To compare kinematic measurements of the trunk and lower extremity in the frontal and sagittal planes between 2D video camera and 3D motion capture analyses obtained concurrently during a SLS...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28511363/solving-the-mystery-of-the-antero-lateral-ligament
#6
P H Sonia Farhan, Rathi Sudhakaran, Jai Thilak
INTRODUCTION: The cruciate ligaments are essential for the antero-posterior stability of the knee joint. In Anterior Cruciate Ligament (ACL) rupture, though reconstructive surgery is a widely accepted and proven procedure, there is still an unacceptably high re-injury rate. The fact that the rotational instability persists even after the surgical reconstruction of ACL injury has evoked a new interest in the study of the soft tissue structures on the anterolateral aspect of the knee joint...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28507967/surgery-of-a-rare-case-of-multiple-synovial-osteochondromatosis-of-the-hip-joint
#7
Yi Min Zhang, Xiaoguang Liu
INTRODUCTION: Primary synovial osteochondromatosis of the hip is a benign disorder, which is not frequently seen clinically. The characteristic of this disease is proliferation of synovium and formation of loose bodies inside the joint. It is known that only the loose bodies derived from synovium were called synovial osteochondromatosis. Although it can take place in any joint, the knee is most commonly affected, involvement of the hip joint is relatively rare. We report a young man who has multiple synovial osteochondromatosis in his left hip...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28503532/changes-in-gait-kinematics-and-muscle-activity-in-stroke-patients-wearing-various-arm-slings
#8
Young-In Hwang, Jangwhon Yoon
Stroke patients often use various arm slings, but the effects of different slings on the joint kinematics and muscle activity of the arm in the gait have not been investigated. The effects of joint kinematics and muscle activity in the gait were investigated to provide suggestions for gait training for stroke patients. In all, 10 chronic stroke patients were voluntarily recruited. An eight-camera three-dimensional motion analysis system was used to measure joint kinematics while walking; simultaneously, electromyography data were collected for the anterior and posterior deltoids and latissimus dorsi...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28502570/a-comparison-of-short-term-radiological-alignment-outcomes-of-the-patient-specific-and-standard-instrumentation-for-primary-total-knee-arthroplasty-a-systematic-review-and-meta-analysis
#9
Ilhan Alcelik, Mark Blomfield, Cenk Öztürk, Ashish Soni, Richard Charity, Alex Acornley
OBJECTIVE: The aim of this study was to review the radiological alignment outcomes of patient Specific (PS) cutting blocks and Standard Instrumentation in Primary Total Knee Arthroplasty. METHODS: We hypothesized that the use of PS techniques would significantly improve sagittal, coronal and rotational alignment of the prosthesis on short term. We performed a systematic review and a meta-analysis including all the randomised controlled trials (RCT) using PS and standard (ST) total knee arthroplasty to date...
May 11, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28500496/patient-specific-instrumentation-improves-alignment-of-lateral-unicompartmental-knee-replacements-by-novice-surgeons
#10
Chin Ting Justin Ng, Simon Newman, Simon Harris, Susannah Clarke, Justin Cobb
PURPOSE: Patient-specific instrumentation (PSI) has the potential to offer numerous benefits-not least of all, improved resection accuracy; but its potential has not been realised in clinical studies. An explanation may be the focus of such studies on the total knee replacement (TKR-a common procedure, with which surgeons are generally very familiar. Consequently, we sought to investigate the potential role of PSI in guiding novice surgeons to perform the more technically demanding and less familiar lateral unicondylar knee replacement (LUKR)...
May 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28499396/averaging-rotational-landmarks-during-total-knee-arthroplasty-reduces-component-malrotation-caused-by-femoral-asymmetry
#11
Tat Woon Chao, Liam Geraghty, Pandelis Dimitriou, Simon Talbot
BACKGROUND: Femoral component malrotation is a common cause of patient dissatisfaction after total knee arthroplasty. The sulcus line (SL) is more accurate than Whiteside's line as it corrects for variation in the coronal orientation of the groove. The hypothesis is that averaging the SL and posterior condylar axis (PCA) will reduce femoral malrotation. METHODS: The component was inserted at a position between the SL and PCA in 91 patients. An intraoperative photograph was taken showing the landmarks...
May 12, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28493040/stability-of-capsule-closure-and-postoperative-anterior-knee-pain-after-medial-parapatellar-approach-in-tka
#12
Armin Keshmiri, Fabian Dotzauer, Clemens Baier, Günther Maderbacher, Joachim Grifka, Ernst Sendtner
PURPOSE: Anterior knee pain after total knee arthroplasty (TKA) remains a widely discussed postoperative complication. In contrast to sports traumatology, the role of the dissected medial patellofemoral ligament (MPFL) using a medial parapatellar approach in TKA has not been discussed so far. In the present study, it was hypothesized that the attempted repair of the MPFL in TKA by simple closure of the joint capsule may not be successful in some cases, causing anterior knee pain. Furthermore, it was hypothesized, that the success of repair might be influenced by femoral component rotation...
May 10, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28487620/kinematics-of-the-normal-knee-during-dynamic-activities-a-synthesis-of-data-from-intracortical-pins-and-biplane-imaging
#13
Xavier Gasparutto, Florent Moissenet, Yoann Lafon, Laurence Chèze, Raphaël Dumas
Few studies have provided in vivo tibiofemoral kinematics of the normal knee during dynamic weight-bearing activities. Indeed, gold standard measurement methods (i.e., intracortical pins and biplane imaging) raise ethical and experimental issues. Moreover, the conventions used for the processing of the kinematics show large inconsistencies. This study aims at synthesising the tibiofemoral kinematics measured with gold standard measurement methods. Published kinematic data were transformed in the standard recommended by the International Society of Biomechanics (ISB), and a clustering method was applied to investigate whether the couplings between the degrees of freedom (DoFs) are consistent among the different activities and measurement methods...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28484908/in-out-versus-out-in-technique-for-acl-reconstruction-a-prospective-clinical-and-radiological-comparison
#14
Edoardo Monaco, Mattia Fabbri, Andrea Redler, Raffaele Iorio, Jacopo Conteduca, Giuseppe Argento, Andrea Ferretti
BACKGROUND: Several studies have recently shown better restoration of normal knee kinematics and improvement of rotator knee stability after reconstruction with higher femoral tunnel obliquity. The aim of this study is to evaluate tunnel obliquity, length, and posterior wall blowout in single-bundle anterior cruciate ligament (ACL) reconstruction, comparing the transtibial (TT) technique and the out-in (OI) technique. MATERIALS AND METHODS: Forty consecutive patients operated on for ACL reconstruction with hamstrings were randomly divided into two groups: group A underwent a TT technique, while group B underwent an OI technique...
May 8, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28484791/varus-femoral-and-tibial-coronal-alignments-result-in-different-kinematics-and-kinetics-after-total-knee-arthroplasty
#15
Mutsumi Watanabe, Shinichi Kuriyama, Shinichiro Nakamura, Yoshihisa Tanaka, Kohei Nishitani, Moritoshi Furu, Hiromu Ito, Shuichi Matsuda
PURPOSE: Abnormal knee motion under various conditions has been described after total knee arthroplasty (TKA). However, differences in kinematics and kinetics of knees with varus femoral versus varus tibial alignment have not been evaluated. It was hypothesized that varus femoral and tibial alignments have the same impact on knee motion. METHODS: A musculoskeletal computer simulation was used. Femoral and tibial alignment in the coronal plane was each varied from neutral to 5° of varus in 1° increments...
May 8, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28484790/lateral-meniscus-posterior-root-tear-contributes-to-anterolateral-rotational-instability-and-meniscus-extrusion-in-anterior-cruciate-ligament-injured-patients
#16
Takao Minami, Takeshi Muneta, Ichiro Sekiya, Toshifumi Watanabe, Tomoyuki Mochizuki, Masafumi Horie, Hiroki Katagiri, Koji Otabe, Toshiyuki Ohara, Mai Katakura, Hideyuki Koga
PURPOSE: The purposes of this study were to investigate (1) meniscus status and clinical findings in anterior cruciate ligament (ACL)-injured patients to clarify associations between the meniscus posterior root tear (PRT) and knee instability, and (2) magnetic resonance imaging (MRI) findings of the PRT to clarify sensitivity and specificity of MRI and prevalence of meniscus extrusion. METHODS: Three hundred and seventeen patients with primary ACL reconstruction were included...
May 8, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28483145/changes-in-relative-work-of-the-lower-extremity-joints-and-distal-foot-with-walking-speed
#17
Anahid Ebrahimi, Saryn R Goldberg, Steven J Stanhope
The modulation of walking speed results in adaptations to the lower limbs which can be quantified using mechanical work. A 6 degree-of-freedom (DOF) power analysis, which includes additional translations as compared to the 3 DOF (all rotational) approach, is a comprehensive approach for quantifying lower limb work during gait. The purpose of this study was to quantify the speed-related 6 DOF joint and distal foot work adaptations of all the lower extremity limb constituents (hip, knee, ankle, and distal foot) in healthy individuals...
April 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28481763/in-plane-ultrasound-guided-knee-injection-through-a-lateral-suprapatellar-approach-a-safe-technique
#18
Francisco A Chagas-Neto, Atul K Taneja, Everaldo Gregio-Junior, Marcello H Nogueira-Barbosa
PURPOSE: This study aims to describe a technique for in-plane ultrasound-guided knee arthrography through a lateral suprapatellar approach, reporting its accuracy and related complications. METHODS: A retrospective search was performed for computed tomography and magnetic resonance reports from June 2013 through June 2015. Imaging studies, puncture descriptions, and guided-procedure images were reviewed along with clinical and surgical history. A fellowship-trained musculoskeletal radiologist performed all procedures under sterile technique and ultrasound guidance with the probe in oblique position on the lateral suprapatellar recess after local anesthesia with the patient on dorsal decubitus, hip in neutral rotation, and 30 to 45 degrees of knee flexion...
June 2017: Ultrasound Quarterly
https://www.readbyqxmd.com/read/28473957/syndesmotic-internalbrace-tm-for-anatomic-distal-tibiofibular-ligament-augmentation
#19
Markus Regauer, Gordon Mackay, Mirjam Lange, Christian Kammerlander, Wolfgang Böcker
Reconstruction of unstable syndesmotic injuries is not trivial, and there is no generally accepted treatment guidelines. Thus, there still remain considerable controversies regarding diagnosis, classification and treatment of syndesmotic injuries. Syndesmotic malreduction is the most common indication for early re-operation after ankle fracture surgery, and widening of the ankle mortise by only 1 mm decreases the contact area of the tibiotalar joint by 42%. Outcome of ankle fractures with syndesmosis injury is worse than without, even after surgical syndesmotic stabilization...
April 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28473283/hip-knee-and-ankle-kinematics-during-activities-of-daily-living-a-cross-sectional-study
#20
Kashitaro Hyodo, Tadashi Masuda, Junya Aizawa, Tetsuya Jinno, Sadao Morita
BACKGROUND: Joint angle data from healthy subjects are necessary as baseline information. OBJECTIVE: To analyze the problems of patients who struggle with activities of daily living (ADL) due to restricted range of motion and to provide ADL guidance based on objective data. METHOD: An electromagnetic three-dimensional tracking system (FASTRAK) was used to quantify the hip, knee, and ankle angles of the dominant leg of 26 healthy adults as they performed 22 ADLs related to dressing, using the toilet, bathing, picking up objects, and crouching...
April 9, 2017: Brazilian Journal of Physical Therapy
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