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https://www.readbyqxmd.com/read/28737955/meta-analysis-of-the-risk-of-infections-after-anterior-cruciate-ligament-reconstruction-by-graft-type
#1
Anchal Bansal, Joseph D Lamplot, James T Vandenberg, Robert H Brophy
BACKGROUND: An infection after anterior cruciate ligament (ACL) reconstruction is a relatively rare but challenging complication. There are no meta-analyses comparing the incidence of infections after ACL reconstruction with the various available graft choices. PURPOSE: To compare the incidence of infections after ACL reconstruction with bone-patellar tendon-bone (BPTB) autografts compared with hamstring autografts, with a secondary aim of comparing the incidence of infections after reconstruction with autografts compared with allografts...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28736078/patellar-tendon-in-vivo-regional-strain-with-varying-knee-angle
#2
Stephen J Pearson, Azlan S A Mohammed, Syed R Hussain
PURPOSE: Descriptive data on the aspects of site specific in vivo tendon strain with varying knee joint angle are non-existent. The present study determines and compares surface and deep layer strain of the patellar tendon during isometric contractions across a range of knee joint angles. METHODS: Male participants (age 22.0±3.4) performed ramped isometric knee extensions at knee joint angles of 90°, 70°, 50° and 30° of flexion. Strain patterns of the anterior and posterior regions of the patellar tendon were determined using real-time B-mode ultrasonography at each knee joint angle...
July 8, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28735802/correction-of-patellofemoral-malalignment-with-patellofemoral-arthroplasty
#3
Marco Valoroso, Mo Saffarini, Giuseppe La Barbera, Cécile Toanen, Gerjon Hannink, Luca Nover, David H Dejour
BACKGROUND: The goal of patellofemoral arthroplasty (PFA) is to replace damaged cartilage and correct underlying deformities to reduce pain and prevent maltracking. We aimed to determine how PFA modifies patellar height, tilt, and tibial tuberosity-trochlear groove (TT-TG) distance. The hypothesis was that PFA would correct trochlear dysplasia or extensor mechanism malalignment. METHODS: The authors prospectively studied a series of 16 patients (13 women and 3 men) aged 64...
July 8, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28734612/primary-total-knee-arthroplasty-how-does-residual-patellar-thickness-affect-patient-oriented-outcomes
#4
Jose C Alcerro, Mark D Rossi, Carlos J Lavernia
BACKGROUND: Maintenance of the native patellar thickness has been deemed important for proper clinical outcomes after total knee arthroplasty (TKA). Our objective was to study the effects of the change in patellar thickness on patient-perceived outcomes (PPOs) after TKA. We hypothesized that reestablishing native patellar thickness after TKA results in better PPOs. METHODS: 819 consecutive patients undergoing primary TKA were studied. Patients were classified according to their postoperative patellar thickness into: (1) less than native patella thickness; (2) equal to native patella thickness; and (3) greater than native patella thickness...
July 5, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28733109/reconstructing-the-chronically-disrupted-knee-extensor-mechanism-after-total-knee-arthroplasty-hourglass-variant-of-the-original-partial-allograft-technique
#5
C Fiquet, A Schneider, R Ballis, E Servien, P Neyret, S Lustig
Allograft reconstruction is a valuable treatment option for patients with chronic extensor mechanism disruption after total knee arthroplasty. Here, an hourglass variant of the original partial allografttechnique is described. An hourglass-shaped patellar bone block is press-fit into the native patella. The graft is fixed to both the patella and the tibia then sutured with the knee fully extended. Outcomes of this technique were assessed in 5 patients after at least 24 months' follow-up. The mean knee and function Knee Society Score values were 77...
July 18, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28733044/management-of-displaced-inferior-patellar-pole-fractures-with-modified-tension-band-technique-combined-with-cable-cerclage-using-cable-grip-system
#6
Xu Yang, Qinfen Wu, Chin-Hui Lai, Xin Wang
INTRODUCTION: We present a modified tension band technique combined with cable cerclage using Cable Grip System for the treatment of displaced inferior patellar pole fractures and report the knee functional outcome. PATIENTS AND METHODS: The patients who had had operative treatment of a displaced inferior patellar pole fracture (AO/OTA 34-A1) between December 2013 and December 2015 were studied retrospectively. Eleven consecutive patients had had open reduction and internal fixation with the modified technique using Cable Grip System, of whom, five males and six females with an average age of 60...
July 13, 2017: Injury
https://www.readbyqxmd.com/read/28730295/incarceration-of-the-medial-collateral-ligament-in-the-intercondylar-notch-following-proximal-avulsion
#7
Edward Walton, Martin Williams, James R Robinson
Intra-articular entrapment of the medial collateral ligament (MCL) is a rare but recognised complication of traumatic injury to the posteromedial corner (PMC) of the knee. Considering the MCL is the most commonly injured ligament of the knee this complication is extremely rare with only a handful of cases describing MCL entrapment following distal avulsion of the MCL. We present the first known case of MCL entrapment following proximal avulsion of the MCL and posterior oblique ligament (POL) with the mid-substance of the MCL becoming entrapped in the joint, lying on the superior surface of the medial meniscus and extending up into the intercondylar notch...
July 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28718946/evidence-for-plical-support-of-the-patella
#8
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/28717629/ultrasound-measures-of-tendon-thickness-intra-rater-inter-rater-and-inter-machine-reliability
#9
María Elena Del Baño-Aledo, Jacinto Javier Martínez-Payá, José Ríos-Díaz, Silvia Mejías-Suárez, Sergio Serrano-Carmona, Ana de Groot-Ferrando
BACKGROUND: Ultrasound imaging is often used by physiotherapists and other healthcare professionals but the reliability of image acquisition with different ultrasound machines is unknown. The objective was to compare the intra-rater, inter-rater and intermachine reliability of thickness measurements of the plantar fascia (PF), Achilles tendon (AT), patellar tendon (PT) and elbow common extensor tendon (ECET) with musculoskeletal ultrasound imaging (MSUS). METHODS: Tendon thickness was measured in four anatomical structures (14 participants, 28 images per tendon) by two sonographers and with two different ultrasound machines...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717625/assessment-of-different-fitting-methods-for-in-vivo-bi-component-t2-analysis-of-human-patellar-tendon-in-magnetic-resonance-imaging
#10
Fang Liu, Richard Kijowski
PURPOSE: To investigate the robustness of four fitting methods for bi-component effective spin-spin T2 (T2(*)) relaxation time analysis of human patellar tendon. METHODS: A three-dimensional (3D) cone ultra-short echo-time (UTE) sequence was performed on the knees of ten healthy volunteers at 3.0T. Four fitting methods incorporating either Gaussian or Rician noise distribution were used for voxel-by-voxel bi-component T2(*) analysis of the patellar tendon. The T2(*) for the short relaxing (T(*)*,s ) and long relaxing (T(*)2,l ) water components and the fraction of the short relaxing water component (fs ) were measured, and different fitting methods were compared using Friedman's and Wilcoxon signed rank tests...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717624/ipsilateral-hamstring-tendon-graft-reconstruction-for-chronic-patellar-tendon-ruptures-surgical-technique
#11
Nicola Maffulli, Angelo Del Buono, Francesco Oliva
BACKGROUND: Patellar tendon chronic ruptures are more debated to manage that acute injuries as the patella tends to retract proximally (after 2 weeks), and surrounding soft tissues may make the repair more complicate. PURPOSE: We propose a novel technique in which the patellar tendon is reconstructed using ipsilateral hamstring tendons. This surgical procedure implies to drill a single tunnel through the patella and another through the tibia to reduce the risk of bony breakage...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717605/i-s-mu-l-t-first-time-patellar-dislocation-guidelines
#12
Mario Vetrano, Francesco Oliva, Salvatore Bisicchia, Michela Bossa, Angelo De Carli, Luigi Di Lorenzo, Davide Erroi, Alfonso Forte, Calogero Foti, Antonio Frizziero, Giuseppe Gasparre, Alessio Giai Via, Bernardo Innocenti, Umile Giuseppe Longo, Asmaa Mahmoud, Stefano Masiero, Daniele Mazza, Simone Natali, Christian Notarangelo, Leonardo Osti, Johnny Padulo, Leonardo Pellicciari, Fabrizio Perroni, Eleonora Piccirilli, Carlo Ramponi, Giuseppe Salvatore, Alfredo Schiavone Panni, Tania Suarez, Umberto Tarantino, Filippo Vittadini, Maria Chiara Vulpiani, Andrea Ferretti, Nicola Maffulli
Primary traumatic patellar dislocation is common, particularly in young active individuals. A consensus on its management is still lacking. The present work provides easily accessible guidelines to be considered as recommendations for a good clinical practice developed through a process of systematic review of the literature and expert opinion, to improve the quality of care and rationalize the use of resources. LEVEL OF EVIDENCE: Ia.
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717066/a-heart-shaped-sleeve-simplifies-intramedullary-tibial-nail-insertion-when-using-the-suprapatellar-approach
#13
Kosuke Tajima, Chikako Shimizu, Soichiro Ohno, Yusho Nishida, Kazuhiko Udagawa, Junichi Sasaki
The suprapatellar approach for intramedullary tibial nailing has become widely accepted over the past decade. A round sleeve is passed beneath the patella to protect the surface of the patellofemoral joint (PFJ). However, the round sleeve cannot be easily stabilized in the PFJ because it does not conform to the shape of the patellar apex. Consequently, we produced a heart-shaped sleeve to simplify the insertion of the entry sleeve during the suprapatellar approach. Using the new sleeve, the following procedure is used: (1) make a longitudinal 4 cm skin incision proximal to the patella to reach the PFJ, (2) insert the guide pin manually to the ventral edge of the tibial plateau, (3) insert the cannulated trocar along the guide pin, (4) insert the heart-shaped sleeve along the cannulated trocar, (5) remove the cannulated trocar, (6) ream the entry point through the heart-shaped sleeve...
July 15, 2017: Keio Journal of Medicine
https://www.readbyqxmd.com/read/28715241/presentation-and-management-of-arthrofibrosis-of-the-knee-a-case-report
#14
Sara A Scholtes, Lynnette Khoo-Summers, Katherine J Damico
STUDY DESIGN: Case report. BACKGROUND: Arthrofibrosis is a debilitating condition that results in pain, decreased range of motion, and decreased function. Although surgical management of arthrofibrosis has been well described in the literature, rehabilitation of the arthrofibrotic knee is less well described. CASE DESCRIPTION: A 28-year-old female presented with swelling, pain, and decreased strength, range of motion, patellar mobility, and function following an exploratory arthroscopy of her left knee...
July 17, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28715039/erratum-to-computed-tomographic-evaluation-of-femoral-and-tibial-conformation-in-english-staffordshire-bull-terriers-with-and-without-congenital-medial-patellar-luxation
#15
Mark Newman, Katja Voss
OBJECTIVE: To compare hindlimb conformation of English Staffordshire Bull Terriers with and without medial patellar luxation using computed tomography. METHODS: Hindlimb computed tomography (CT) was performed on six English Staffordshire Bull Terriers with grade II or III medial patellar luxation, and six without medial patellar luxation. Inclination angle, femoral condyle trochanteric angle, anteversion angle (AA), distal anteversion angle (DAA), proximal anteversion angle (PAA), femoral varus angle (FVA), tibial valgus angle (TVA), and tibial torsion angle (TTA) were measured...
July 10, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28713612/in-vivo-magnetic-resonance-imaging-morphometry-of-the-patella-bone-in-south-indian-population
#16
Reshma Muhamed, Vasudha V Saralaya, B V Murlimanju, Ganesh Kumar Chettiar
Racial differences exist in the dimensions of structures and the commercially available prostheses are designed based on the Caucasians. In this context, the goal of the present investigation was to determine the gender wise measurements of patella bone in South Indians. The present study included axial magnetic resonance images of the knee joint from 140 South Indian adults (70 males, 70 females; aged between 20-70 years). The angle, width, thickness, lateral facet width, facet thickness, ratio of the lateral facet, the relative thickness and ratio of facet thickness were measured in the patella by using the digital ruler...
June 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28712028/internal-femoral-component-rotation-adversely-influences-load-transfer-in-total-knee-arthroplasty-a-cadaveric-navigated-study-using-the-verasense-device
#17
William A Manning, Kanishka M Ghosh, Alasdair Blain, Lee Longstaff, Steven P Rushton, David J Deehan
PURPOSE AND HYPOTHESIS: Correct femoral component rotation at knee arthroplasty influences patellar tracking and may determine function at extremes of movement. Additionally, such malrotation may deleteriously influence flexion/extension gap geometry and soft tissue balancing kinematics. Little is known about the effect of subtle rotational change upon load transfer across the tibiofemoral articulation. Our null hypothesis was that femoral component rotation would not influence load across this joint in predictable manner...
July 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28711951/optimizing-patellar-positioning-during-total-knee-arthroplasty-an-anatomical-and-clinical-study
#18
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/28707752/analysis-of-the-correlation-between-knee-extension-torque-and-patellar-tendon-elastic-property
#19
P Mannarino, K M M Lima, C R C Fontenelle, T T Matta, B F de Salles, R Simão, L F Oliveira
PURPOSE: Quadriceps strength and patellar tendon (PT) are directly linked and intimately related to daily activities and lower limb function. However, the correlation between knee extension torque (KT) and PT Young's modulus (E) measured directly is still unknown. METHOD: We used supersonic shearwave imaging (SSI) to evaluate the elastic property of PT in healthy young men and analysed its correlation with KT. Twenty-two healthy young males were included and both knees were examined...
July 14, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28707311/dynamic-contrast-enhanced-mri-of-the-patellar-bone-how-to-quantify-perfusion
#20
Dirk H J Poot, Rianne A van der Heijden, Marienke van Middelkoop, Edwin H G Oei, Stefan Klein
PURPOSE: To identify the optimal combination of pharmacokinetic model and arterial input function (AIF) for quantitative analysis of blood perfusion in the patellar bone using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI). MATERIALS AND METHODS: This method design study used a random subset of five control subjects from an Institutional Review Board (IRB)-approved case-control study into patellofemoral pain, scanned on a 3T MR system with a contrast-enhanced time-resolved imaging of contrast kinetics (TRICKS) sequence...
July 14, 2017: Journal of Magnetic Resonance Imaging: JMRI
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