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https://www.readbyqxmd.com/read/28220268/anterolateral-ligament-expert-group-consensus-paper-on-the-management-of-internal-rotation-and-instability-of-the-anterior-cruciate-ligament-deficient-knee
#1
REVIEW
Bertrand Sonnery-Cottet, Matthew Daggett, Jean-Marie Fayard, Andrea Ferretti, Camilo Partezani Helito, Martin Lind, Edoardo Monaco, Vitor Barion Castro de Pádua, Mathieu Thaunat, Adrian Wilson, Stefano Zaffagnini, Jacco Zijl, Steven Claes
Purpose of this paper is to provide an overview of the latest research on the anterolateral ligament (ALL) and present the consensus of the ALL Expert Group on the anatomy, radiographic landmarks, biomechanics, clinical and radiographic diagnosis, lesion classification, surgical technique and clinical outcomes. A consensus on controversial subjects surrounding the ALL and anterolateral knee instability has been established based on the opinion of experts, the latest publications on the subject and an exchange of experiences during the ALL Experts Meeting (November 2015, Lyon, France)...
February 20, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28217572/arthroscopic-patterns-of-the-poster-medial-aspect-of-the-knee-joint-classification-of-the-gastrocnemius-semimembranosus-gateway-and-its-relationship-with-baker-s-cyst
#2
Vittorio Calvisi, Carmine Zoccali
BACKGROUND: The gastrocnemius-semimembranosus bursa may communicate with the knee joint. The arthroscopic anatomy of the posteromedial aspect varies depending on the angle of the oblique popliteal ligament, the level at which it crosses the medial gastrocnemius tendon, and its relationship with the capsular joint and synovia. The aim of this paper is to identify possible patterns, and to evaluate their characteristics and their relationship with Baker's cyst. METHODS: data archived from 185 consecutive arthroscopies were evaluated; an anatomic description and classification was carried out; the percentages of association with BC and the associated pathologies were reported...
October 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28211591/magnetic-resonance-imaging-of-the-knee-an-overview-and-update-of-conventional-and-state-of-the-art-imaging
#3
Nicholas C Nacey, Matthew G Geeslin, Grady Wilson Miller, Jennifer L Pierce
: Magnetic resonance imaging (MRI) has become the preferred modality for imaging the knee to show pathology and guide patient management and treatment. The knee is one of the most frequently injured joints, and knee pain is a pervasive difficulty that can affect all age groups. Due to the diverse pathology, complex anatomy, and a myriad of injury mechanisms of the knee, the MRI knee protocol and sequences should ensure detection of both soft tissue and osseous structures in detail and with accuracy...
February 17, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28196619/development-and-verification-of-novel-porous-titanium-metaphyseal-cones-for-revision-total-knee-arthroplasty
#4
Ahmad Faizan, Manoshi Bhowmik-Stoker, Amanda E Kirk, Viktor E Krebs, Steven F Harwin, R Michael Meneghini
BACKGROUND: Porous metaphyseal cones are widely used in revision knee arthroplasty. A new system of porous titanium metaphyseal cones has been designed based on the femoral and tibial morphology derived from a computed tomography-based anatomical database. The purpose of this study is to evaluate the initial mechanical stability of the new porous titanium revision cone system by measuring the micromotion under physiologic loading compared with a widely-used existing porous tantalum metaphyseal cone system...
January 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28188083/ct-based-morphological-analysis-of-the-posterior-femoral-condyle-in-patients-with-trochlear-dysplasia
#5
Xiaohui Liu, Gang Ji, Xinmin Wang, Huijun Kang, Fei Wang
BACKGROUND: The anterior part of the distal femur in trochlear dysplasia has been well investigated; however, to date, posterior morphological characteristics have not been well studied. This study aimed to evaluate whether the posterior femoral condyle in patients with trochlear dysplasia differs from those without trochlear dysplasia. METHODS: Computed tomography scans of 75 knees with trochlear dysplasia and 55 knees with normal anatomy of the patellofemoral joint were analyzed retrospectively...
February 7, 2017: Knee
https://www.readbyqxmd.com/read/28154888/permanent-knee-sensorimotor-system-changes-following-acl-injury-and-surgery
#6
John Nyland, Collin Gamble, Tiffany Franklin, David N M Caborn
The cruciate ligaments are components of the knee capsuloligamentous system providing vital neurosensory and biomechanical function. Since most historical primary ACL repair attempts were unsuccessful, reconstruction has become the preferred surgery. However, an increased understanding of the efficacy of lesion-site scaffolding, innovative suturing methods and materials, and evolving use of biological healing mediators such as platelet-rich plasma and stem cells has prompted reconsideration of what was once believed to be impossible...
February 2, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28124108/the-infra-meniscal-fibers-of-the-anterolateral-ligament-are-stronger-and-stiffer-than-the-supra-meniscal-fibers-despite-similar-histological-characteristics
#7
Gillian Corbo, Madeleine Norris, Alan Getgood, Timothy A Burkhart
PURPOSE: The purpose of the current investigation was to characterize biomechanical differences between the supra- and infra-meniscal sections of the anterolateral ligament (ALL). We hypothesized that the supra-meniscal fibers of the ALL would be stronger and stiffer than the infra-meniscal fiber. METHODS: Nine cadaveric knee specimens [mean (SD) age = 79 (14.6) years] were dissected to identify the borders of the ALL while maintaining the anatomy of the lateral meniscus...
January 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28094482/real-time-ultrasound-guided-spinal-anesthesia-in-patients-with-predicted-difficult-anatomy
#8
Hesham Elsharkawy, Ankit Maheshwari, Rovnat Babazade, Anahi Perlas, Sherif Zaky, Loran M Soliman
BACKGROUND: There are limited reports of lumbar neuraxial blocks using real-time ultrasound in patients with predicted difficulties. We compared the number of attempts to perform spinal anesthesia using real time ultrasound guidance versus landmark technique in patients meeting predefined criteria for difficult spinal anesthesia. We also compared procedure time, block success, patient satisfaction and difficulty scores between groups. METHODS: Following institutional review board approval patients scheduled for total hip or knee arthroplasty with expected difficulty to perform spinal anesthesia were included...
January 17, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28089467/the-evolution-of-implant-design-decreases-the-incidence-of-lateral-release-in-primary-total-knee-arthroplasty
#9
Jonathan E Webb, Heidi Y Yang, Jamie E Collins, Elena Losina, Thomas S Thornhill, Jeffrey N Katz
BACKGROUND: Appropriate balancing of the patellofemoral joint (PFJ) using a lateral release can help to prevent patellar instability in total knee arthroplasty (TKA). Contemporary total knee implant designs are characterized by enhanced trochlear geometry more similar to native knee anatomy to minimize instability and reduce utilization of a lateral release. METHODS: We retrospectively reviewed consecutive TKA cases from a single senior surgeon's practice with 3 successive total knee designs: the Press-Fit Condylar (PFC), the Sigma, and the ATTUNE (DePuy, Warsaw, IN)...
December 14, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28078394/kinematics-of-a-bicruciate-retaining-total-knee-arthroplasty
#10
Thomas J Heyse, Joshua Slane, Geert Peersman, Margo Dirckx, Arne van de Vyver, Philipp Dworschak, Susanne Fuchs-Winkelmann, Lennart Scheys
PURPOSE: The recently reintroduced bicruciate-retaining Total Knee Arthroplasty (BCR TKA) is an interesting approach in the quest for close replication of knee joint biomechanics and kinematics closer to the native knee. Therefore, this study aimed at providing a detailed biomechanical view on the functional resemblance of BCR TKA to the native knee joint. METHODS: Seven fresh-frozen full leg cadaver specimens (76 ± 10 year) were mounted in a 6 degrees-of-freedom kinematic rig that applied a dynamic squatting motion knee flexion...
January 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28051829/apophyseal-and-epiphyseal-knee-injuries-in-the-adolescent-athlete
#11
P Persiani, F M Ranaldi, A Formica, M Mariani, O Mazza, M Crostelli, C Villani
OBJECTIVES: In the context of pediatric sports injuries, the epiphyseal and apophyseal knee fractures represent rather peculiar lesions. The most frequently involved anatomical area is the knee. The peculiar function of the physis and the need to preserve their integrity, makes choosing what treatment methods to employ very important. Objective of this study is to assess the kind and the effectiveness of the most suitable treatment in the apophyseal and epiphyseal knee lesions occurring in the adolescents...
November 2016: La Clinica Terapeutica
https://www.readbyqxmd.com/read/28050573/relationship-between-the-middle-genicular-artery-and-the-posterior-structures-of-the-knee-a-cadaveric-study
#12
Rogério Teixeira de Carvalho, Leonardo Addêo Ramos, João Victor Novaretti, Leandro Masini Ribeiro, Paulo Roberto de Queiroz Szeles, Sheila Jean McNeill Ingham, Rene Jorge Abdalla
BACKGROUND: The middle genicular artery (MGA) is responsible for the blood supply to the cruciate ligaments and synovial tissue. Traumatic sports injuries and surgical procedures (open and arthroscopic) can cause vascular damage. Little attention has been devoted to establish safe parameters for the MGA. PURPOSE: To investigate the anatomy of the MGA and its relation to the posterior structures of the knees, mainly the posterior capsule and femoral condyles, and to establish safe parameters to avoid harming the MGA...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28040320/semimembranosus-tenosynovitis-diagnosis-and-management-of-a-commonly-missed-cause-of-posteromedial-knee-pain
#13
Joel K Melton, Arman Memarzadeh, William H Dunbar, Mervyn J Cross
BACKGROUND: In orthopedic and sports medicine literature there is minimal information regarding accurate diagnosis and the treatment options for tenosynovitis of the distal semimembranosus tendon. After reviewing the literature, the authors question both the etiology and treatment of this condition. Previous descriptions have associated the condition primarily with the endurance athlete but we have noted multiple cases in which this is a condition common to the 'sprinter' as well. There has been very little mention of this condition in recent literature but the most recent complete description of operative treatment for this condition recommends both tendon transfer and concomitant arthroscopy...
December 28, 2016: Knee
https://www.readbyqxmd.com/read/28032697/patient-specific-orthopaedic-implants
#14
REVIEW
Jack M Haglin, Adam E M Eltorai, Joseph A Gil, Stephen E Marcaccio, Juliana Botero-Hincapie, Alan H Daniels
Patient-specific orthopaedic implants are emerging as a clinically promising treatment option for a growing number of conditions to better match an individual's anatomy. Patient-specific implant (PSI) technology aims to reduce overall procedural costs, minimize surgical time, and maximize patient outcomes by achieving better biomechanical implant fit. With this commercially-available technology, computed tomography or magnetic resonance images can be used in conjunction with specialized computer programs to create preoperative patient-specific surgical plans and to develop custom cutting guides from 3-D reconstructed images of patient anatomy...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28005166/anatomic-dissection-of-the-anterolateral-ligament-all-in-paired-fresh-frozen-cadaveric-knee-joints
#15
Philip P Roessler, Karl F Schüttler, Thomas Stein, Sascha Gravius, Thomas J Heyse, Andreas Prescher, Dieter C Wirtz, Turgay Efe
INTRODUCTION: Different dissection studies as well as comparative studies about the anterolateral ligament of the knee (ALL) already exist and the structure's topology and properties have been shown. However, most of the studies investigating the ligament were performed in embalmed knees, which is thought to change the structural integrity of ligaments and thus the topologic and dynamic measurements. Since the biomechanical function of the ALL is not fully understood until today and a correlation with the pivot shift phenomenon is yet speculative, further studies will have to clarify its definitive importance...
February 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28002906/tears-of-popliteomeniscal-fascicles-diagnostic-and-clinical-implications-a-review-of-the-evidence
#16
R Papalia, R Simonetta, G Di Vico, G Torre, L Saccone, J Espregueira-Mendes, V Denaro
Postero-lateral corner of the knee is composed of several structures including the popliteo-meniscal fascicles (PMFs). These fibrous structures form a stable ligamentous complex around the popliteus tendon, which stabilize the lateral meniscus, increasing the strength of postero-lateral corner. Studies were retrieved through an electronic search of CINAHL, EMBASE, and Pub-Med, until May 2016. Studies in English, Italian, French, and Spanish were considered for inclusion. Randomized controlled trials, prospective and retrospective comparative studies, case series, and case reports were included...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/27990614/anatomical-variation-in-the-anterolateral-ligament-of-the-knee-and-a-new-dissection-technique-for-embalmed-cadaveric-specimens
#17
Matthew Parker, Heather F Smith
Claes et al. recently documented and described the anterolateral ligament (ALL) of the knee, demonstrating its existence in 97% of their samples. Here, we further examined the anatomy of this ligament, documented its morphological variation, and assessed the feasibility of its dissection in preserved cadaveric specimens. To achieve this, we dissected 53 preserved cadaveric knees and documented their morphological variation in the anterolateral ligament. The originally described dissection technique for identifying and following the ALL requires flexion of the knee, a state which is often not possible in stiff, preserved cadavers...
December 18, 2016: Anatomical Science International
https://www.readbyqxmd.com/read/27973959/three-dimensional-digitalized-virtual-planning-for-saphenous-artery-flap-a-pilot-study
#18
Yuan Z Zhang, Shu Z Wen, Hui Q Zhang, Ya G Li, Jian M Zhao, Yong Yang
OBJECTIVE: Since the 1970s, research and applications on flap and muscle flap had solved many problems in microsurgical reconstruction. However, the traditional flap design is completely dependent on two-dimensional (2D) images. The purpose of this study was to discuss the methods in the visualization of saphenous artery flap by digitalized technique and its applications by digitalized technique. METHODS: Two adult fresh cadaver specimens, one male and one female, were subject to radiographic computerized tomography (CT) scanning before and after perfused with lead oxide-gelatine mixture, whose collimation are 0...
December 2016: Comput Assist Surg (Abingdon)
https://www.readbyqxmd.com/read/27936429/investigation-of-biomechanical-response-of-hoffa-s-fat-pad-and-comparative-characterization
#19
Chiara Giulia Fontanella, Emanuele Luigi Carniel, Alessandro Frigo, Veronica Macchi, Andrea Porzionato, Gloria Sarasin, Marco Rossato, Raffaele De Caro, Arturo N Natali
The infrapatellar adipose body (Hoffa's fat pad, IFP) is situated between the patellar tendon, the femoral condyle and the tibial plateau. The IFP consists of lobules of white adipose tissue delimited by thin connective septa. The actual structural functionality of the IFP is debated and should pertain to a cushioning role in the knee joint, providing to distribute and to damp mechanical stresses during articular activity. The present study is aimed to analyze the correlation between histological configuration and mechanical properties of the IFP, compared to other adipose tissues, partially differentiated by composition and conformation...
December 1, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27906945/ganglion-cyst-at-the-proximal-tibiofibular-joint-in-a-patient-with-painless-foot-drop
#20
Abdulmuhsen Alsahhaf, Waleed Renno
Entrapment neuropathies of the fibular nerve and its branches are often underdiagnosed due to the lack of reliable diagnosis using clinical examination and electrophysiologic evaluation. Most fibular nerve compressions may be classified into 2 broad categories: (a) mechanical causes, which occur at fibrous or fibro-osseous tunnels, and (b) dynamic causes related to nerve injury during specific limb positioning. Foot drop resulting from weakness of the dorsiflexor muscles of the foot is a relatively uncommon presentation and closely related to L5 neuropathy caused by a disc herniation...
November 2016: Pain Physician
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