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https://www.readbyqxmd.com/read/29330745/-treatment-of-rotational-malalignment-of-the-lower-leg
#1
REVIEW
P Keppler
BACKGROUND: Rotational malalignment after intramedullary nailing of tibial shaft fractures is not uncommon. In-toeing and out-toeing conditions in children are often the reason for orthopedic and traumatological medical consultation. OBJECTIVE: Evaluation of diagnostic modalities and therapeutic options for rotational malalignment in relationship to the patient's age. Surgical indications and efficacy of specific surgical techniques. MATERIAL AND METHODS: Systematic literature search in the German Institute for Medical Documentation and Information (DIMDI) and MEDLINE and evaluation of the currently published articles...
January 12, 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29329889/exploring-individual-adaptations-to-an-anterior-cruciate-ligament-injury-prevention-programme
#2
Aaron S Fox, Jason Bonacci, Scott G McLean, Natalie Saunders
BACKGROUND: Individual responses to anterior cruciate ligament injury prevention programmes (ACL IPPs) have received little attention. This study examined the effects of an ACL IPP on neuromuscular control and lower limb biomechanics during landing at the group and individual levels. METHODS: Sixteen female athletes were randomly allocated to training (n=8) or control (n=8) groups. Electromyography, and three-dimensional kinematic and kinetic data were collected during landing at two testing sessions...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29327169/passive-stiffness-of-monoarticular-lower-leg-muscles-is-influenced-by-knee-joint-angle
#3
Filiz Ateş, Ricardo J Andrade, Sandro R Freitas, François Hug, Lilian Lacourpaille, Raphael Gross, Can A Yucesoy, Antoine Nordez
PURPOSE: While several studies demonstrated the occurrence of intermuscular mechanical interactions, the physiological significance of these interactions remains a matter of debate. The purpose of this study was to quantify the localized changes in the shear modulus of the gastrocnemius lateralis (GL), monoarticular dorsi- and plantar-flexor muscles induced by a change in knee angle. METHOD: Participants underwent slow passive ankle rotations at the following two knee positions: knee flexed at 90° and knee fully extended...
January 11, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29325834/a-computed-tomography-scan-based-template-to-place-the-femoral-component-in-accurate-rotation-with-respect-to-the-surgical-epicondylar-axis-in-total-knee-arthroplasty
#4
Yasushi Oshima, Norishige Iizawa, Tatsunori Kataoka, Tokifumi Majima, Shinro Takai
BACKGROUND: Femoral rotational alignment is considered an essential factor for total knee arthroplasty because malrotation of femoral components results in poor outcomes. To obtain proper alignment, we developed a superimposable computed tomography (CT) scan-based template to intraoperatively determine the accurate surgical epicondylar axis (SEA), and evaluated the effectiveness of this CT template. METHODS: In the experimental group (n=55), three serial slices of CT images, including medial and lateral epicondyles, were merged into a single image, and SEA was overlaid...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29322318/total-knee-arthroplasty-with-unexplained-pain-new-insights-from-kinematics
#5
Célia Planckaert, Gabriel Larose, Pierre Ranger, Marc Lacelle, Alexandre Fuentes, Nicola Hagemeister
INTRODUCTION: Up to 20% of total knee arthroplasty patients remain unsatisfied post-surgery, and a large proportion of them report anterior knee pain. This study aims to verify whether patients who experience anterior knee pain after total knee arthroplasty (TKA) will exhibit kinematic characteristics similar to those associated with patellofemoral syndrome, including in the frontal and transverse planes. MATERIALS AND METHODS: Using four different assessment methods [radiological, patient-reported outcome, musculoskeletal assessment with functional performance testing, and a 3D kinematic assessment during gait], the clinical and 3D knee kinematic profiles of three groups were compared: a painful and an asymptomatic TKA group and a healthy control group...
January 10, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29321059/intrarater-reliability-of-the-humac-norm-isokinetic-dynamometer-for-strength-measurements-of-the-knee-and-shoulder-muscles
#6
Bas Habets, J Bart Staal, Marsha Tijssen, Robert van Cingel
OBJECTIVE: To determine the intrarater reliability of the Humac NORM isokinetic dynamometer for concentric and eccentric strength tests of knee and shoulder muscles. RESULTS: 54 participants (50% female, average age 20.9 ± 3.1 years) performed concentric and eccentric strength measures of the knee extensors and flexors, and the shoulder internal and external rotators on two different Humac NORM isokinetic dynamometers, which were situated at two different centers...
January 10, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29312875/functional-dynamic-radiography-with-computer-analysis-for-physiological-chest-imaging-and-kinematic-joint-imaging
#7
Shigeru Sanada
We developed a functional digital radiography system that provides physiological and functional information of the chest and/or joints using an X-ray flat-panel detector (FPD) system. During chest examination, sequential chest radiographs are taken from inspiration to expiration in order to analyze diaphragmatic movements. Pixel value changes in localized areas of the lung are then assessed to analyze ventilation and circulation. For limb joints, such as the wrist, shoulder, and knee, sequential radiographs during flexion and extension or rotational movement are considered, and movement angles are analyzed...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312850/anterolateral-rotatory-instability-in-vivo-correlates-tunnel-position-after-anterior-cruciate-ligament-reconstruction-using-bone-patellar-tendon-bone-graft
#8
Yasutaka Tashiro, Ken Okazaki, Koji Murakami, Hirokazu Matsubara, Kanji Osaki, Yukihide Iwamoto, Yasuharu Nakashima
AIM: To quantitatively assess rotatory and anterior-posterior instability in vivo after anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BTB) autografts, and to clarify the influence of tunnel positions on the knee stability. METHODS: Single-bundle ACL reconstruction with BTB autograft was performed on 50 patients with a mean age of 28 years using the trans-tibial (TT) (n = 20) and trans-portal (TP) (n = 30) techniques. Femoral and tibial tunnel positions were identified from the high-resolution 3D-CT bone models two weeks after surgery...
December 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29310058/the-effects-of-low-arched-feet-on-lower-limb-joints-moment-asymmetry-during-gait-in-children-a-cross-sectional-study
#9
AmirAli Jafarnezhadgero, Mahdi Majlesi, Morteza Madadi-Shad
BACKGROUND: The prevalence of flexible flat feet in children was reported to be up to 20% in previous studies. However, the role of foot type in the development of musculoskeletal injuries is less clear, particularly in children. The purpose of this study was to investigate the differences in the joint moment asymmetry in children with flexible flat feet and healthy matched control subjects. METHODS: Fourteen male children with flexible flat feet and 15 healthy control subjects served as the sample of the study...
November 10, 2017: Foot
https://www.readbyqxmd.com/read/29305450/in-vivo-three-dimensional-kinematics-of-normal-knees-during-different-high-flexion-activities
#10
K Kono, T Tomita, K Futai, T Yamazaki, S Tanaka, H Yoshikawa, K Sugamoto
AIMS: In Asia and the Middle-East, people often flex their knees deeply in order to perform activities of daily living. The purpose of this study was to investigate the 3D kinematics of normal knees during high-flexion activities. Our hypothesis was that the femorotibial rotation, varus-valgus angle, translations, and kinematic pathway of normal knees during high-flexion activities, varied according to activity. MATERIALS AND METHODS: We investigated the in vivo kinematics of eight normal knees in four male volunteers (mean age 41...
January 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29304102/activation-of-biceps-femoris-long-head-reduces-tibiofemoral-anterior-shear-force-and-tibial-internal-rotation-torque-in-healthy-subjects
#11
Nur Liyana Azmi, Ziyun Ding, Rui Xu, Anthony M J Bull
The anterior cruciate ligament (ACL) provides resistance to tibial internal rotation torque and anterior shear at the knee. ACL deficiency results in knee instability. Optimisation of muscle contraction through functional electrical stimulation (FES) offers the prospect of mitigating the destabilising effects of ACL deficiency. The hypothesis of this study is that activation of the biceps femoris long head (BFLH) reduces the tibial internal rotation torque and the anterior shear force at the knee. Gait data of twelve healthy subjects were measured with and without the application of FES and taken as inputs to a computational musculoskeletal model...
2018: PloS One
https://www.readbyqxmd.com/read/29303366/current-clinical-radiological-and-treatment-perspectives-of-patellofemoral-pain-syndrome
#12
Aishwarya Gulati, Christopher McElrath, Vibhor Wadhwa, Jay P Shah, Avneesh Chhabra
Anterior knee pain in active young adults is commonly related to patellofemoral (PF) pain syndrome (PFPS), which can be broadly classified into patellar malalignment and patellar maltracking. PFPS can be caused by a host of miserable malalignments, such as excessive femoral antetorsion, tibial varus / external rotation, knee valgus and pes planus. Radiographic, CT and MRI evaluations are commonly obtained to further elucidate the malalignment and maltracking abnormalities and exclude other related differentials, such as lateral meniscus tear, extensor tendon tear, anterior tenosynovial giant cell tumor and plica syndrome...
January 5, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29291280/hip-and-knee-exercise-for-patellofemoral-pain-using-the-evidence-to-guide-physical-therapist-practice
#13
(no author information available yet)
The etiology of patellofemoral pain (PFP) is thought to include both local factors (those near the patellofemoral joint and surrounding tissues) and nonlocal factors (those related to the mechanics of the distal and proximal joints). Traditionally, PFP rehabilitation protocols have focused on local factors. Strengthening of the hip may reduce excessive hip adduction and medial rotation during weightbearing activities and so decrease patellofemoral joint stresses. However, while previous studies indicate that including hip strengthening may lessen the intensity of PFP, the effects on strength and activity remain uncertain...
January 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29287952/the-effect-of-sequential-tearing-of-the-anterior-cruciate-and-anterolateral-ligament-on-anterior-translation-and-the-pivot-shift-phenomenon-a-cadaveric-study-using-navigation
#14
Edoardo Monaco, Mattia Fabbri, Daniele Mazza, Matthew Daggett, Andrea Redler, Riccardo Maria Lanzetti, Angelo De Carli, Andrea Ferretti
PURPOSE: To evaluate the effect of progressive lesions of the anterior cruciate ligament (ACL) and anterolateral ligament (ALL) on anterior tibial translation (ATT) as evaluated through the Lachman test and internal tibial rotation (ITR) during a dynamic pivot-shift test in a cadaveric model. METHODS: A total of 7 specimens were tested using a navigation system (2.2 OrthoPilot ACL navigation system). The anterior stability of the knee was measured through the Lachman test and dynamic rotational stability was measured through the pivot-shift test in 3 different conditions: intact knee; ACL-deficient knee; and finally, ACL- and ALL-deficient knee...
December 26, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29282486/patient-specific-instrumentation-in-oxford-unicompartmental-knee-arthroplasty-is-reliable-and-accurate-except-for-the-tibial-rotation
#15
B Kerens, A M Leenders, M G M Schotanus, B Boonen, W E Tuinebreijer, P J Emans, B Jong, N P Kort
PURPOSE: Patient-specific instrumentation (PSI) is a technique to plan and position the prosthesis components in unicompartmental knee arthroplasty (UKA) surgery. This study assesses whether the definitive component position in the frontal, sagittal and axial plane is according to the preoperative plan, based on the hypothesis that PSI is accurate. METHODS: Twenty-six patients who had PSI Oxford UKA surgery were included prospectively. The component position in vivo was determined with a postoperative CT-scan and compared with the planned component position using MRI-based digital 3D imaging...
December 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29281712/posture-alteration-as-a-measure-to-accommodate-uneven-ground-in-able-bodied-gait
#16
Soran Aminiaghdam, Reinhard Blickhan, Roy Muller, Christian Rode
Though the effects of imposed trunk posture on human walking have been studied, less is known about such locomotion while accommodating changes in ground level. For twelve able participants, we analyzed kinematic parameters mainly at touchdown and toe-off in walking across a 10-cm visible drop in ground level (level step, pre-perturbation step, step-down, step-up) with three postures (regular erect, ~30° and ~50° of trunk flexion from the vertical). Two-way repeated measures ANOVAs revealed step-specific effects of posture on the kinematic behavior of gait mostly at toe-off of the pre-perturbation step and the step-down as well as at touchdown of the step-up...
2017: PloS One
https://www.readbyqxmd.com/read/29276463/conservative-management-of-possible-meniscal-derangement-using-the-mulligan-concept-a-case-report
#17
Belinda J Sanchez, Russell T Baker
Objective: The purpose of this case study was to report on the immediate effects of the combined use of mobilizations with movement and the "squeeze" technique on a patient with knee stiffness, popping, and swelling. Clinical Features: The patient presented with right knee stiffness, swelling, and a popping sensation of insidious onset. Clinical examination revealed pain with terminal knee extension and flexion, joint line tenderness, a positive Apley's compression test, and a positive Thessaly's test at 20° of knee flexion...
December 2017: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/29274863/total-knee-arthroplasty-with-the-medial-pivot-knee-system-clinical-and-radiological-outcomes-at-9-5-years-mean-follow-up
#18
M Dehl, Y Bulaïd, M Chelli, B Ramy, A Gabrion, E Havet, P Mertl
INTRODUCTION: The "ball-in-socket" design of the Medial-Pivot Knee System (MicroPort Orthopedics, Arlington, Tennessee, USA) aims to reproduce normal knee kinematics by medializing its rotational axis. The goal of this study was to measure knee range of motion (ROM) with this implant after a mean follow-up of 10 years and to report the survivorship and long-term clinical and radiological outcomes. We hypothesized the prosthetic knee would have at least 120 flexion at 10 years. MATERIAL AND METHODS: This was retrospective, single-centre study of 74 Medial-Pivot knees implanted in 71 patients (average age of 69 years) between May 2005 and November 2007...
December 21, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29274859/variable-tibiofemoral-articular-contact-stress-in-fixed-bearing-total-knee-arthroplasties
#19
K Murakami, S Hamai, T Moro-Oka, K Okazaki, H Higaki, T Shimoto, S Ikebe, Y Nakashima
BACKGROUND: Rotational allowance at the tibiofemoral joint would be required during deep flexion. However, the amount of flexion and rotation has not been investigated in modern total knee arthroplasty (TKA) designs. The present study aimed to determine the contact stress in five posterior-stabilized fixed-bearing TKA designs. HYPOTHESIS: We hypothesized that the contact area and stresses at the tibiofemoral articular surfaces vary according to the type of implant design and tested condition...
December 21, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29247357/tibial-internal-rotation-negatively-affects-clinical-outcomes-in-total-knee-arthroplasty-a-systematic-review
#20
REVIEW
Alfredo Schiavone Panni, Francesco Ascione, Marco Rossini, Adriano Braile, Katia Corona, Michele Vasso, Michael T Hirschmann
PURPOSE: The aim of this systematic review is to analyze the effect of tibial rotational alignment after total knee arthroplasty (TKA) on clinical outcomes and assess the eventual cut-off values for tibial TKA rotation leading to poor outcomes. METHODS: A detailed and systematic search from 1997 to 2017 of the Pubmed, Medline, Cochrane Reviews, and the Google Scholar databases was performed using the keyword terms "total knee arthroplasty", "total knee replacement", "tibial alignment", "tibial malalignement", "tibial rotation", "rotational error", "axis", "angle", "tibial malrotation", "clinical outcome", in several combinations...
December 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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