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https://www.readbyqxmd.com/read/28933331/-comparison-of-the-arthroscopic-finding-in-the-knee-joint-and-the-mri-retrospective-study
#1
K Šimeček, P Látal, J Duda, M Šimeček
PURPOSE OF THE STUDY Our retrospective study presents the comparison of the preoperative magnetic resonance imaging of the knee joint - MRI - and the arthroscopic finding - ASC. Its aim is to find out how a positive or a negative finding of MRI corresponds with the operative finding and how much the experience of radiologist contributes to the conformity. MATERIAL AND METHODS The MRI findings of knee joints treated surgically at two departments in 2013 and 2014 were assessed. The MRI was performed in a total of 470 patients who subsequently underwent an arthroscopic surgery...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28925568/the-fibular-meniscus-of-the-kangaroo-as-an-adaptation-against-external-tibial-rotation-during-saltatorial-locomotion
#2
Adrian C Miller, Martin A Cake, Natalie M Warburton
The kangaroo knee is, as in other species, a complex diarthrodial joint dependent on interacting osseous, cartilaginous and ligamentous components for its stability. While principal load bearing occurs through the femorotibial articulation, additional lateral articulations involving the fibula and lateral fabella also contribute to the functional arrangement. Several fibrocartilage and ligamentous structures in this joint remain unexplained or have been misunderstood in previous studies. In this study, we review the existing literature on the structure of the kangaroo 'knee' before providing a new description of the gross anatomical and histological structures...
September 19, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28924737/contribution-to-the-anatomical-nomenclature-concerning-lower-limb-anatomy
#3
David Kachlik, Vladimir Musil, Vaclav Baca
PURPOSE: The aim of this article is to extend and revise the sections of Terminologia Anatomica (TA) dealing with the lower limb structures and to justify the use of newly proposed anatomical terms in clinical medicine, education, and research. METHODS: Anatomical terms were gathered during our educational experience from anatomical textbooks and journals and compared with the four previous editions of the official Latin anatomical nomenclature. RESULTS: The authors summarise 270 terms with their definitions and explanations for both constant and variable morphological structures (bones, joints, muscles, vessels, nerves and superficial structures) of the hip, thigh, knee, leg, ankle, and foot completed with several grammatical remarks and some general anatomical terms...
September 18, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28917580/the-influence-of-ligament-modelling-strategies-on-the-predictive-capability-of-finite-element-models-of-the-human-knee-joint
#4
Hamid Naghibi Beidokhti, Dennis Janssen, Sebastiaan van de Groes, Javad Hazrati, Ton Van den Boogaard, Nico Verdonschot
In finite element (FE) models knee ligaments can represented either by a group of one-dimensional springs, or by three-dimensional continuum elements based on segmentations. Continuum models closer approximate the anatomy, and facilitate ligament wrapping, while spring models are computationally less expensive. The mechanical properties of ligaments can be based on literature, or adjusted specifically for the subject. In the current study we investigated the effect of ligament modelling strategy on the predictive capability of FE models of the human knee joint...
September 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28884106/understanding-posterior-meniscal-roots-lesions-from-basic-science-to-treatment
#5
REVIEW
Raphael Serra Cruz, Marcio Balbinotti Ferrari, Leonardo Metsavaht, Robert F LaPrade
The variability of symptoms and the fact that they are not easily recognized in imaging studies make the diagnosis and treatment of posterior meniscal roots lesions a challenging task to the orthopedist. In recent years, a more precise understanding of the anatomy and biomechanical impair of the knee joint in these cases has enabled great advances in therapeutic approaches. Well-documented studies have shown that the repair of these lesions presents superior functional and clinical improvement when compared with meniscectomy...
June 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28882491/anatomic-and-high-resolution-computed-tomographic-angiography-study-of-the-lateral-femoral-condyle-flap-implications-for-surgical-dissection
#6
Mohamed Morsy, Yoo Joon Sur, Osman Akdag, Amr Eisa, Tarek A El-Gammal, Nirusha Lachman, Steven L Moran
BACKGROUND: The lateral femoral condyle (LFC) flap is a vascularized bone flap based on the superior lateral genicular artery (SLGA). Harvest technique for this flap has not yet been demonstrated. The purpose of this study was to better delineate the blood supply to the bone and skin of this flap to allow for a safe and effective harvest. MATERIALS AND METHODS: Twenty-three lower extremities were injected with latex or a mixture of latex and barium sulfate. The SLGA was identified and dissected, documenting the course, diameter, anatomical relations, length, and branches...
August 16, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28878515/review-medial-collateral-ligament-injuries
#7
REVIEW
Kyle Andrews, Alex Lu, Lucas Mckean, Nabil Ebraheim
The medial collateral ligament (MCL) is a major stabilizer of the knee joint. It is the most common ligament injured in the knee, particularly in athletes, and has been reported to be torn in 7.9% of all knee injuries.(2) The MCL has a complex, layered anatomy with multiple insertions and functions. Minor trauma can cause tearing of the superficial portion whereas higher energy mechanisms can disrupt both the deep and superficial layers. History and physical are often adequate, but the gold standard for diagnosis is MRI...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28870873/the-kinematic-alignment-technique-for-tka-reliably-aligns-the-femoral-component-with-the-cylindrical-axis
#8
Charles Riviere, FarhadIranpour, Simon Harris, Edouard Auvinet, ArashAframian, Patrick Chabrand, Justin Cobb
INTRODUCTION: Kinematic alignment (KA) technique is an alternative technique for positioning a TKA, which aims a patient-specific implant positioning in order to reproduce the pre-arthritic knee anatomy. Because reliability in implant positioning is of interest to obtain reproducible good functional results, our study tests the hypothesis that the medial and lateral distal and posterior positions of the planned and surgically implantedkinematically aligned femoralcomponentare similar...
September 1, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28833609/magnetic-resonance-imaging-of-the-tensor-vastus-intermedius-a-topographic-study-based-on-anatomical-dissections
#9
K Grob, M Manestar, D Gascho, T Ackland, H Gilbey, Kuster, Ch Fretz
The tensor of the vastus intermedius (TVI) is a newly described component of the extensor apparatus of the knee joint. The objective of this study was to evaluate the appearance of the TVI on magnetic resonance (MR) imaging and its association with the adjacent vastus lateralis (VL) and vastus intermedius (VI) muscles and to compare these findings with the corresponding anatomy. MR images were analyzed from a cadaveric thigh where the TVI, as part of the extensor apparatus of the knee joint, had been dissected...
August 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28832324/the-morphological-anatomy-of-the-menisci-of-the-knee-joint-in-human-fetuses
#10
Esra Koyuncu, Gülnur Özgüner, Kenan Öztürk, Cemil Bilkay, Ahmet Dursun, Osman Sulak
BACKGROUND: Development of the fetal period of the meniscus has been reported in different studies. AIMS: Evaluation of the lateral and the medial menisci development, typing and the relationship of the tibia during the fetal period. STUDY DESIGN: Anatomical dissection. METHODS: We were evaluated 210 knee meniscus obtained from 105 human fetuses that in age from 9-40 weeks. Fetuses were divided into four groups. Intraarticular structure were exposed...
August 23, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28831554/the-impact-of-patient-specific-instrumentation-on-unicompartmental-knee-arthroplasty-a-prospective-randomised-controlled-study
#11
Abtin Alvand, Tanvir Khan, Cathy Jenkins, Jonathan L Rees, William F Jackson, Christopher A F Dodd, David W Murray, Andrew J Price
PURPOSE: Patient-specific instrumentation (PSI) has been proposed as a means of improving surgical accuracy and ease of implantation during technically challenging procedures such as unicompartmental knee arthroplasty (UKA). The purpose of this prospective randomised controlled trial was to compare the accuracy of implantation and functional outcome of mobile-bearing medial UKAs implanted with and without PSI by experienced UKA surgeons. METHODS: Mobile-bearing medial UKAs were implanted in 43 patients using either PSI guides or conventional instrumentation...
August 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28831525/large-correction-in-opening-wedge-high-tibial-osteotomy-with-resultant-joint-line-obliquity-induces-excessive-shear-stress-on-the-articular-cartilage
#12
Hiroshi Nakayama, Steffen Schröter, Chie Yamamoto, Tomoya Iseki, Ryo Kanto, Kenji Kurosaka, Shunichiro Kambara, Shinichi Yoshiya, Masaru Higa
PURPOSE: The purpose of this study was to analyse the resultant stress induced by joint-line obliquity after HTO for varus knee deformity using a three-dimensional (3D) finite element model analysis. METHODS: The geometrical bone data used in this study were derived from commercially available human bone digital anatomy media. The 3D knee models were developed using 3D computer-aided design software. The articular surface was overlaid with a 2-mm-thick cartilage layer for both femoral and tibial condyles...
August 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28828058/arthroscopic-knee-anatomy-in-young-achondroplasia-patients
#13
M Del Pilar Duque Orozco, N C Record, K J Rogers, M B Bober, W G Mackenzie, A Atanda
PURPOSE: Achondroplasia is the most common form of skeletal dysplasia, affecting more than 250 000 individuals worldwide. In these patients, the developing knee undergoes multiple anatomical changes. The purpose of this study was to characterise the intra-articular knee anatomy in children with achondroplasia who underwent knee arthroscopy. METHODS: Records of achondroplasia patients who underwent knee arthroscopy between 2009 and 2014 were reviewed. Demographic data, operative reports, follow-up notes, MRI and arthroscopy images were reviewed...
June 1, 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28820012/effect-of-rotational-prosthetic-alignment-variation-on-tibiofemoral-contact-pressure-distribution-and-joint-kinematics-in-total-knee-replacement
#14
Xin Xie, Roy Rusly, John D DesJardins, Frank Voss, Kim Chillag, Martine LaBerge
In total knee replacement surgery, implant alignment is one of the most important criteria for successful long-term clinical outcome. During total knee replacement implantation, femoral and tibial alignment are determined through appropriate bone resections, which could vary based on patient anatomy, implant design and surgical technique and further influence loading conditions and clinical outcomes. The current research focused on three critical alignment parameters for total knee replacement insertion: femoral component internal/external (I/E) rotation, varus-valgus tibiofemoral angulation and posterior tibial slope...
August 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28805136/the-ovine-model-for-meniscus-tissue-engineering-considerations-of-anatomy-function-implantation-and-evaluation
#15
Andrzej Brzezinski, Salim A Ghodbane, Jay M Patel, Barbara A Perry, Charles J Gatt, Michael G Dunn
Meniscus injuries represent one of the most-common intra-articular knee injuries. The current treatment options include meniscectomy and allograft transplantation, both with poor long-term outcomes. Therefore, there is a need for regenerative techniques to restore meniscal function. In order to pre-clinically test scaffolds for meniscus replacement, large-animal models need to be established and standardized. This review establishes the anatomical and compositional similarities between the human and sheep menisci and provides guidance for implantation and evaluation of such devices...
August 12, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28802742/the-challenges-of-measuring-in-vivo-knee-collateral-ligament-strains-using-ultrasound
#16
Laura C Slane, Josh A Slane, Jan D'hooge, Lennart Scheys
Ultrasound-based methods have shown promise in their ability to characterize non-uniform deformations in large energy-storing tendons such as the Achilles and patellar tendons, yet applications to other areas of the body have been largely unexplored. The noninvasive quantification of collateral ligament strain could provide an important clinical metric of knee frontal plane stability, which is relevant in ligament injury and for measuring outcomes following total knee arthroplasty. In this pilot cadaveric experiment, we investigated the possibility of measuring collateral ligament strain with our previously validated speckle-tracking approach, but encountered a number of challenges during both data acquisition and processing...
August 16, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28795411/does-ultrasound-enhanced-instruction-of-musculoskeletal-anatomy-improve-physical-examination-skills-of-first-year-medical-students
#17
Bryant J Walrod, Allison Schroeder, Mark J Conroy, Laura C Boucher, Marcia Bockbrader, David P Way, Kendra L McCamey, Clinton A Hartz, Michael A Jonesco, David P Bahner
OBJECTIVES: Ultrasound imaging is commonly used to teach basic anatomy to medical students. The purpose of this study was to determine whether learning musculoskeletal anatomy with ultrasound improved performance on medical students' musculoskeletal physical examination skills. METHODS: Twenty-seven first-year medical students were randomly assigned to 1 of 2 instructional groups: either shoulder or knee. Both groups received a lecture followed by hands-on ultrasound scanning on live human models of the assigned joint...
August 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28791808/a-randomized-blinded-comparative-study-of-clinical-response-to-surface-anatomy-guided-injection-versus-sonography-guided-injection-of-hyaloronic-acid-in-patients-with-primary-knee-osteoarthritis
#18
Nahid Kianmehr, Atefeh Hasanzadeh, Farrokh Naderi, Sholeh Khajoei, Anousheh Haghighi
BACKGROUND AND AIM: Comparison between the effect of sonographic guided and blind knee injection of hyaluronic acid has been evaluated in this study. METHODS AND MATERIALS: Sixty-one patients with primary knee osteoarthritis were randomly allocated into two groups and received intrabursal injection of hyaloronic acid over 3 weeks. The difference between baseline amounts of Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Knee Injury and Osteoarthritis Outcome Score and visual analogue scale (VAS) score and these amounts after 6 and 12 weeks were calculated and subsequently compared between the two groups...
August 9, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28777285/3d-modeling-of-lower-extremities-with-biplanar-radiographs-reliability-of-measures-on-subsequent-examinations
#19
David E Westberry, Ashley M Carpenter
BACKGROUND: Biplanar radiography with 3-dimensional (3D) modeling (EOS) provides a comprehensive assessment of lower limb alignment in an upright weight-bearing position with less radiation than conventional radiography. A study was performed to assess the consistency and reliability of 2 lower extremity 3D biplanar radiograph models created at least 1 year apart in a pediatric population. METHODS: All patients who had 2 lower extremity radiographic evaluations with EOS performed at visits a minimum of 1 year apart were reviewed...
August 2, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28733774/a-study-of-anatomy-of-distal-femur-pertaining-to-total-knee-replacement-an-analysis-conclusions-and-recommendations
#20
K Kumar, D Sharma
BACKGROUND: Multiple landmarks including the transepicondylar axis (TEA), posterior condylar axis (PCA) and anterior trochlear line (TL) have been used to set up the femoral component rotation, but each is faced with its own practical obstacle that limits its usage. Also a common practice is to set the femoral component rotation at 3° external rotation to PCA and valgus resection angle at 5°-7° to anatomical axis of femur. For the reason that the anatomy of each knee is different, it may not be justified to practice such a set protocol in all cases...
July 21, 2017: Musculoskeletal Surgery
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