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https://www.readbyqxmd.com/read/28718946/evidence-for-plical-support-of-the-patella
#1
Robert M Geraghty, Michelle Spear
There is a consensus that there is no overt anterior joint capsule in the knee. However, other anterior structures act in lieu of a joint capsule: the quadriceps tendon and patellar retinacular fibres. In the absence of a capsule, the synovium forms the suprapatellar pouch. Other synovial structures, the plicae, are more controversial. They are often described as embryonic remnants with no function, despite surrounding the patella. We aimed to identify plical anatomy and histology on cadaveric dissection and to examine their embryology using the human virtual embryo website...
July 18, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28711951/optimizing-patellar-positioning-during-total-knee-arthroplasty-an-anatomical-and-clinical-study
#2
Chahine Assi, Nadim Kheir, Camille Samaha, Mary Deeb, Kaissar Yammine
INTRODUCTION: Optimal positioning of the patellar component is crucial for the success of a total knee arthroplasty (TKA). Usually, the patellar component is placed empirically over the presumed centre of the patellar cut. Medialization of the prosthetic patella has been recommended; however, no evidence-based guidelines have been reported. MATERIAL AND METHOD: This anatomical study aims to quantify a pre-defined optimal location for positioning of the patellar component with regard to the centre of the patellar cut...
July 15, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28702380/patient-specific-instrumentation-in-total-knee-arthroplasty-should-we-adopt-it
#3
REVIEW
Ana Sofia Teles Rodrigues, Manuel António Pereira Gutierres
Total knee arthroplasty (TKA) is a surgical procedure of paramount relevance that restores a substantial degree of function in arthritic knees. Increased consideration has been given to the influence of limb alignment on longevity after TKA, as errors in component placement can be associated with inferior function and compromised long-term performance. Consequently, numerous studies comparing patient-specific instrumentation (PSI) to standard instruments (SI) have been published. Patient-specific approaches use preoperative imaging to create specific materials for each patient's anatomy and were designed to achieve a higher rate of success in TKA, causing the entire procedure to be more efficient and cost-effective...
May 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28684458/influence-of-carotid-siphon-anatomy-on-brain-aneurysm-presentation
#4
E Waihrich, P Clavel, G A C Mendes, C Iosif, I Moraes Kessler, C Mounayer
BACKGROUND AND PURPOSE: Intracranial aneurysm is a devastating disease of complex etiology that is not fully understood. The purpose of this study was to assess the implications of carotid siphon anatomy for the formation and development of intracranial aneurysms. MATERIALS AND METHODS: Between January 2007 and May 2015, lateral view digital subtraction angiographic images of 692 consecutive patients with intracranial aneurysms treated in our department of interventional neuroradiology were reviewed and had their angles measured...
July 6, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28677057/forensic-age-estimation-by-magnetic-resonance-imaging-of-the-knee-the-definite-relevance-in-bony-fusion-of-the-distal-femoral-and-the-proximal-tibial-epiphyses-using-closest-to-bone-t1-tse-sequence
#5
Christian Ottow, Ronald Schulz, Heidi Pfeiffer, Walter Heindel, Andreas Schmeling, Volker Vieth
OBJECTIVES: To clarify the relevance of the bony fusion of the distal femoral and the proximal tibial epiphyses by means of magnetic resonance imaging (MRI), a prospective cross-sectional cohort study was performed with a special focus on a reliable determination of the 14th, 16th and 18th years of life. METHODS: We scanned 658 German volunteers in the age bracket 12-24 years using a 3.0 T MR-scanner and utilising a T1 turbo spin-echo sequence representing true bone anatomy...
July 4, 2017: European Radiology
https://www.readbyqxmd.com/read/28673200/analysis-of-functional-outcome-of-hoffa-fractures-a-retrospective-review-of-32-patients
#6
Vivek Trikha, Saubhik Das, Sahil Gaba, Prabhat Agrawal
PURPOSE: Hoffa fractures are uncommon intra-articular fractures of femoral condyle in coronal plane. The purpose of our study is to assess radiologic and functional outcome in operatively treated Hoffa fractures. METHODS: We retrospectively reviewed 32 patients of isolated Hoffa fracture from January 2010 to March 2015. All were treated with open reduction and internal fixation using lateral approach for lateral Hoffa and medial approach for medial Hoffa fracture...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28662894/medial-patellofemoral-ligament-medial-patellotibial-ligament-and-medial-patellomeniscal-ligament-anatomic-histologic-radiographic-and-biomechanical-study
#7
Betina B Hinckel, Riccardo G Gobbi, Marco K Demange, Cesar Augusto M Pereira, Jose Ricardo Pécora, Renato Jose M Natalino, Luciana Miyahira, Bruno S Kubota, Gilberto Luis Camanho
PURPOSE: To describe the anatomy (quantitative macroscopic and histologic), radiographic parameters of the insertions, and biomechanical characteristics of the medial ligamentous restrictors of the patella (medial patellofemoral ligament [MPFL], medial patellotibial ligament [MPTL], and medial patellomeniscal ligament [MPML]) in cadaveric knees. Because the MPTL and the MPML are not as well known as the MPFL, they were the focus of this study. METHODS: MPFLs, MPTLs, and MPMLs from 9 knees were dissected...
June 26, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28657560/understanding-the-human-knee-and-its-relationship-to-total-knee-replacement
#8
Enrico Vaienti, Giacomo Scita, Francesco Ceccarelli, Francesco Pogliacomi
The knee is the intermediate joint of the lower limb and it allows the movement between the femur, tibia and patella. Under normal conditions there is a normal distribution of the load forces on these three articular components in both the static load and during ambulation. The understanding of anatomy and knee biomechanics is important for the gait analysis, the diagnosis of joint diseases and the design and development of prosthetic implants. In the last decades comprehension of knee physiology and kinematics has led to the introduction of a wide range of enhanced prosthetic implant designs for a variety of indications...
June 7, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28656366/biographical-background-and-origin-of-common-eponymous-terms-in-orthopedic-surgery-anatomy-and-fractures-in-knee-surgery
#9
Matthijs P Somford, Rebecca A Nieuwe Weme, Daniël Hoornenborg, Johannes I Wiegerinck, Jos J A M van Raay, Reinoud W Brouwer, Andy Williams
An eponym is a person after whom an eponymous term is named. These eponymous terms are easy shorthand in communication between surgeons. Therefore, they are often used and hard to eradicate. We discuss eponymous terms that describe anatomical features and fracture types in the knee. With these terms, an overview of the historical background of the eponym and its current clinical implication is discussed. The eponymous terms discussed are Gerdy tubercle, Pellegrini-Stieda lesion, Segond fracture, Hoffa fracture and fat pad...
June 27, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28642658/study-of-the-anterolateral-ligament-of-the-knee-in-formalin-embedded-cadavers
#10
Paloma Batista Almeida Fardin, Juliana Hott de Fúcio Lizardo, Josemberg da Silva Baptista
OBJECTIVE: To verify the incidence and characterize morphologically the anterolateral ligament of the knee (ALL) in cadaveric samples of the collection of the Laboratory of Anatomy of the Department of Morphology of the Universidade Federal do Espírito Santo. METHODS: Dissections and cross sections were performed for mesoscopic analysis of the anterolateral region of 15 knees preserved in 4% formalin solution in order to identify the ALL. RESULTS: After dissection of the skin and subcutaneous tissue of the knee anterolateral region, it was possible to identify the iliotibial tract (ITT), the patellar ligament and the femoral biceps tendon...
March 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28641973/changes-in-hip-knee-and-ankle-coronal-alignments-after-total-hip-arthroplasty-with-transverse-femoral-shortening-osteotomy-for-unilateral-crowe-type-iv-developmental-dysplasia-of-the-hip
#11
Abdulhamit Misir, Turan B Kizkapan, Kadir I Yildiz, Mehmet A Kaygusuz, Yakup Alpay, Atakan Ezici
BACKGROUND: To investigate changes in lower extremity coronal alignment in patients with unilateral Crowe type IV developmental dysplasia of the hip who underwent total hip arthroplasty with transverse femoral shortening osteotomy. METHODS: We reviewed the preoperative and 1-year postoperative full-length lower extremity radiographs of 25 patients. Femoral offset (FO), mechanical hip-knee-ankle angle, anatomical axis, mechanical axis deviation (MAD), mechanical lateral proximal femoral angle, anatomical medial proximal femoral angle, mechanical lateral distal femoral angle, anatomical lateral distal femoral angle, knee joint line congruency angle, mechanical medial proximal tibial angle, mechanical lateral distal tibial angle, ankle joint line orientation angle, tibial plafond talus angle, extremity length, and pelvic obliquity were measured on both the operative and nonoperative sides...
June 1, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28630763/malignant-tumours-of-the-foot-and-ankle
#12
E Mascard, N Gaspar, L Brugières, C Glorion, S Pannier, A Gomez-Brouchet
Most of tumours of the foot are tumour-like (synovial cyst, foreign body reactions and epidermal inclusion cyst) or benign conditions (tenosynovial giant cells tumours, planta fibromatosis). Malignant tumours of the soft-tissue and skeleton are very rare in the foot and their diagnosis is often delayed with referral to specialised teams after initial inappropriate procedures or unplanned excisions. The adverse effect of these misdiagnosed tumours is the increasing rate of amputation or local recurrences in the involved patients...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28615108/kinematics-of-different-components-of-the-posterolateral-corner-of-the-knee-in-the-lateral-collateral-ligament-intact-state-a-human-cadaveric%C3%A2-study
#13
Christoph Domnick, Karl-Heinz Frosch, Michael J Raschke, Nils Vogel, Martin Schulze, Mathias von Glahn, Tobias C Drenck, Mirco Herbort
PURPOSE: To determine the static stabilizing effects of different anatomical structures of the posterolateral corner (PLC) of the knee in the lateral collateral ligament (LCL)-intact state. METHODS: Thirteen fresh-frozen human cadaveric knees were dissected and tested using an industrial robot with an optical tracking system. Kinematics were determined for 134 N anterior/posterior loads, 10 N m valgus/varus loads, and 5 N m internal/external rotatory loads in 0°, 20°, 30°, 60°, and 90° of knee flexion...
June 11, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28612204/three-dimensional-isotropic-magnetic-resonance-imaging-can-provide-a-reliable-estimate-of-the-native-anterior-cruciate-ligament-insertion-site-anatomy
#14
Daisuke Araki, Eric Thorhauer, Scott Tashman
PURPOSE: This study quantified the error in anterior cruciate ligament (ACL) insertion site location and area estimated from three-dimensional (3D) isotropic magnetic resonance imaging (MRI) by comparing to native insertion sites determined via 3D laser scanning. METHODS: Isotropic 3D DESS MRI was acquired from twelve fresh-frozen, ACL-intact cadaver knees. ACL insertion sites were manually outlined in each MRI slice, and the resulting contours combined to determine the 3D insertion site shape...
June 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28609131/a-comprehensive-reanalysis-of-the-distal-iliotibial-band-quantitative-anatomy-radiographic-markers-and-biomechanical-properties
#15
Jonathan A Godin, Jorge Chahla, Gilbert Moatshe, Bradley M Kruckeberg, Kyle J Muckenhirn, Alexander R Vap, Andrew G Geeslin, Robert F LaPrade
BACKGROUND: The qualitative anatomy of the distal iliotibial band (ITB) has previously been described. However, a comprehensive characterization of the quantitative anatomic, radiographic, and biomechanical properties of the Kaplan fibers of the deep distal ITB has not yet been established. It is paramount to delineate these characteristics to fully understand the distal ITB's contribution to rotational knee stability. Purpose/Hypothesis: There were 2 distinct purposes for this study: (1) to perform a quantitative anatomic and radiographic evaluation of the distal ITB's attachment sites and their relationships to pertinent osseous and soft tissue landmarks, and (2) to quantify the biomechanical properties of the deep (Kaplan) fibers of the distal ITB...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28608727/osteoarthritis-of-the-anterior-cruciate-ligament-and-medial-tibial-plateau-a-cadaveric-study
#16
Jessica Immonen, Chris Siefring, Luke Sanders
The objective of this study was to analyze morphometric anatomy and damages with aging in cadaveric knee specimens specific to the cruciate ligaments, the articular cartilage of the tibial plateau, and the menisci. Morphometric analyses to cadaveric anatomy of the knee were performed using Image-Pro® software on 3 age populations: <70 years old, 70 to 79 years old, and ≥80 years old. An average thickness of the cruciate ligaments was assessed with 5 circumferential measurements per specimen using nylon thread...
June 1, 2017: Cartilage
https://www.readbyqxmd.com/read/28604466/unique-considerations-in-spinal-cord-stimulator-placement-in-pediatrics-a-case-report
#17
Eugene Kim, Giovanni Cucchiaro
Spinal cord stimulation can be a valuable treatment option in the management of neuropathic pain in select pediatric patients. We present a unique case of a 16-year-old girl with Klippel-Trenaunay-Weber syndrome and scoliosis who required the placement of a spinal cord stimulator (SCS) for severe sciatic nerve neuropathic pain after a right above-knee amputation. Several attempts at lead placement were required before successful pain coverage was achieved because of late recognition of significant vertebral body rotation...
June 8, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28593582/morphological-size-evaluation-of-the-mid-substance-insertion-areas-and-the-fan-like-extension-fibers-in-the-femoral-acl-footprint
#18
Makoto Suruga, Takashi Horaguchi, Takanori Iriuchishima, Yoshiyuki Yahagi, Genki Iwama, Yasuaki Tokuhashi, Shin Aizawa
PURPOSE: The purpose of this study was to evaluate the detailed anatomy of the femoral anterior cruciate ligament (ACL) insertion site, with special attention given to the morphology of the mid-substance insertion areas and the fan-like extension fibers. METHODS: Twenty-three non-paired human cadaver knees were used (7 Males, 16 Females, median age 83, range 69-96). All soft tissues around the knee were resected except the ligaments. The ACL was divided into antero-medial (AM) and postero-lateral (PL) bundles according to the difference in macroscopic tension patterns...
June 7, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28587797/comparison-of-long-term-outcomes-of-heparin-bonded-polytetrafluoroethylene-and-autologous-vein-below-knee-femoropopliteal-bypasses-in-patients-with-critical-limb-ischaemia
#19
C Uhl, C Grosch, C Hock, I Töpel, M Steinbauer
OBJECTIVE/BACKGROUND: Endovascular first is the preferred therapy approach to critical limb ischaemia (CLI). However, in spite of new endovascular techniques, bypass surgery still plays an important role, especially in patients with complex anatomy in whom endovascular therapy is not considered feasible, or has failed. The goal of this study was to analyse the outcomes of prosthetic or autologous vein for femoropopliteal (P3) bypasses performed under the abovementioned conditions. METHODS: A retrospective analysis of patients who underwent a femoropopliteal (P3) bypass for CLI (March 2007-December 2015) was conducted...
June 3, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28581279/improved-software-to-browse-the-serial-medical-images-for-learning
#20
Koojoo Kwon, Min Suk Chung, Jin Seo Park, Byeong Seok Shin, Beom Sun Chung
The thousands of serial images used for medical pedagogy cannot be included in a printed book; they also cannot be efficiently handled by ordinary image viewer software. The purpose of this study was to provide browsing software to grasp serial medical images efficiently. The primary function of the newly programmed software was to select images using 3 types of interfaces: buttons or a horizontal scroll bar, a vertical scroll bar, and a checkbox. The secondary function was to show the names of the structures that had been outlined on the images...
July 2017: Journal of Korean Medical Science
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