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https://www.readbyqxmd.com/read/28644188/surgical-techniques-for-total-knee-arthroplasty-measured-resection-gap-balancing-and-hybrid
#1
Neil P Sheth, Adeel Husain, Charles Lenwood Nelson
Total knee arthroplasty (TKA) is effective in managing end-stage degenerative joint disease. Achieving favorable clinical outcomes is predicated on proper implant alignment, sizing, and rotation as well as adequate soft-tissue balancing. Modern TKA implants are designed to address the fundamental needs of attaining stability in both flexion and extension and of optimizing patellar tracking. Measured resection and gap balancing are the two different techniques used to implant the TKA components used today. Both techniques have been validated as durable and successful, and each has unique advantages and disadvantages...
July 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28644116/axillary-intraneural-ganglion-cysts
#2
Kartik G Krishnan, Nikhil K Prasad, Kimberly K Amrami, Paul J Kurtin, Robert J Spinner
Aside from affecting the stability of the glenohumeral joint, tears in the joint capsule can give rise to extraneural (paralabral) and, very rarely, intraneural ganglion cysts. This report presents the first two cases of axillary intraneural ganglion cysts in the literature with magnetic resonance imaging. Both cases were incidentally noted to have coexisting lesions (lymphadenopathy from an undifferentiated malignancy and suprascapular nerve entrapment, respectively). This report reinforces the applicability of the articular theory for intraneural ganglion cysts at a novel site...
2017: Journal of Surgical Orthopaedic Advances
https://www.readbyqxmd.com/read/28644076/a-novel-surgical-approach-to-avian-femorotibiotarsal-luxation-repair
#3
Anna E McRee, Thomas N Tully, Javier G Nevarez, Julia Sumner, Anderson Favero da Cunha
A 3-month-old male umbrella cockatoo (Cacatua alba) was presented because of acute non-weight-bearing lameness of the right leg. Marked soft tissue swelling was present around the femorotibiotarsal (stifle) joint, and the radiographic diagnosis was right medial femorotibiotarsal subluxation. Surgical management was elected, and the stifle joint was approached via a lateral parapatellar incision. Joint exploration revealed damage to the lateral meniscus, tendon of origin of the cranial tibial muscle, and cranial cruciate ligament...
June 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28642694/ehlers-danlos-syndrome-hypermobility-type-impact-of-somatosensory-orthoses-on-postural-control-a-pilot-study
#4
Emma G Dupuy, Pascale Leconte, Elodie Vlamynck, Audrey Sultan, Christophe Chesneau, Pierre Denise, Stéphane Besnard, Boris Bienvenu, Leslie M Decker
Elhers-Danlos syndrome (EDS) is the clinical manifestation of connective tissue disorders, and comprises several clinical forms with no specific symptoms and selective medical examinations which result in a delay in diagnosis of about 10 years. The EDS hypermobility type (hEDS) is characterized by generalized joint hypermobility, variable skin hyperextensibility and impaired proprioception. Since somatosensory processing and multisensory integration are crucial for both perception and action, we put forth the hypothesis that somatosensory deficits in hEDS patients may lead, among other clinical symptoms, to misperception of verticality and postural instability...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28641171/electromyographic-analysis-of-rotator-cuff-muscles-in-patients-with-rotator-cuff-tendinopathy-a-systematic-review
#5
REVIEW
Fábio Carlos Lucas de Oliveira, Laurent Julien Bouyer, Amanda L Ager, Jean-Sébastien Roy
The shoulder is inherently an unstable joint which heavily relies on the neuromuscular activation of the rotator cuff (RC) complex for stability during movement. Currently, there is no consensus regarding how the activity of RC muscles is affected among individuals with a RC tendinopathy (RCTe). This study reviewed the evidence of studies comparing the electromyographic (EMG) activity of any RC muscle of shoulders with a symptomatic RCTe to asymptomatic shoulders. Eight databases were searched. Data from 343 participants (201 symptomatic and 209 asymptomatic shoulders) were analyzed from 10 out of 402 included studies...
June 10, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28638170/atlas-based-automatic-measurements-of-the-morphology-of-the-tibiofemoral-joint
#6
M Brehler, G Thawait, W Shyr, J Ramsay, J H Siewerdsen, W Zbijewski
PURPOSE: Anatomical metrics of the tibiofemoral joint support assessment of joint stability and surgical planning. We propose an automated, atlas-based algorithm to streamline the measurements in 3D images of the joint and reduce user-dependence of the metrics arising from manual identification of the anatomical landmarks. METHODS: The method is initialized with coarse registrations of a set of atlas images to the fixed input image. The initial registrations are then refined separately for the tibia and femur and the best matching atlas is selected...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28637185/a-novel-method-of-open-reduction-and-internal-fixation-of-a-displaced-manubrial-fracture-using-distal-clavicle-locking-plates
#7
Daniel Miller, M Adeel Akhtar, Jonathan Fergusson, James L McVie
A 52-year-old man sustained a sternal fracture after a blunt traumatic chest injury. He was in severe pain in the intensive care unit, which resulted in difficulty breathing and increased analgesic requirement, and a decision was made to stabilize his manubrial fracture. Orthopaedic and thoracic surgeons jointly performed open reduction and internal fixation of the displaced manubrial fracture using 2 distal clavicle locking plates. This resulted in improvement in patient's pain and helped with his subsequent recovery and discharge from the hospital...
June 20, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28632594/outcome-of-early-and-late-diagnosed-essex-lopresti-injury
#8
Marc Schnetzke, Felix Porschke, Karin Hoppe, Stefan Studier-Fischer, Paul-Alfred Gruetzner, Thorsten Guehring
BACKGROUND: The aim of this study was to investigate the outcomes in a large series of Essex-Lopresti injuries (ELIs) and to compare patients with early and late diagnoses. METHODS: Thirty-one patients with an ELI (average age and standard deviation [SD], 46 ± 10 years) who were followed for a minimum of 2 years were included in the study. Patients were grouped according to whether the ELI had been diagnosed early (on the day of the injury) or late (>4 weeks after the radial head injury)...
June 21, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28630813/mutations-in-the-sh1-helix-alter-the-thermal-properties-of-myosin-ii
#9
Kotomi Shibata, Tsubasa Koyama, Shohei Inde, Sosuke Iwai, Shigeru Chaen
The myosin II SH1 helix is a joint that links the converter subdomain to the rest of the myosin motor domain and possibly plays a key role in the arrangement of the converter/lever arm. Several point mutations within the SH1 helix in human myosin IIs have been shown to cause diseases. To reveal whether these SH1 helix mutations affect not only motile activities but also thermal properties of myosin II, here we introduced the E683K or R686C point mutation into the SH1 helix in Dictyostelium myosin II. Thermal inactivation as well as thermal aggregation rates of these mutant proteins demonstrated that these mutations decreased the thermal stability of myosin II...
2017: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/28630761/partial-proximal-tibia-fractures
#10
Michael J Raschke, Christoph Kittl, Christoph Domnick
Partial tibial plateau fractures may occur as a consequence of either valgus or varus trauma combined with a rotational and axial compression component.High-energy trauma may result in a more complex and multi-fragmented fracture pattern, which occurs predominantly in young people. Conversely, a low-energy mechanism may lead to a pure depression fracture in the older population with weaker bone density.Pre-operative classification of these fractures, by Müller AO, Schatzker or novel CT-based methods, helps to understand the fracture pattern and choose the surgical approach and treatment strategy in accordance with estimated bone mineral density and the individual history of each patient...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28630757/the-patellofemoral-joint-from-dysplasia-to-dislocation
#11
Stefano Zaffagnini, Alberto Grassi, Gianluca Zocco, Michele Attilo Rosa, Cecilia Signorelli, Giulio Maria Marcheggiani Muccioli
Patellofemoral dysplasia is a major predisposing factor for instability of the patellofemoral joint. However, there is no consensus as to whether patellofemoral dysplasia is genetic in origin, caused by imbalanced forces producing maltracking and remodelling of the trochlea during infancy and growth, or due to other unknown and unexplored factors.The biomechanical effects of patellofemoral dysplasia on patellar stability and on surgical procedures have not been fully investigated. Also, different anatomical and demographic risk factors have been suggested, in an attempt to identify the recurrent dislocators...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28628157/-biomechanical-analysis-of-the-deep-radioulnar-ligaments-stabilizing-the-distal-radioulnar-joint
#12
(no author information available yet)
OBJECTIVE: To evaluate the role of the deep radioulnar ligament in the stability of the distal radioulnar joint (DRUJ). METHODS: In the study, 14 fresh cadaver upper extremities were randomly divided into two groups. After exposuring the palmar and dorsal deep distal radioulnar ligament, one group was marked as palmar deep radioulnar ligament, and the other group was marked as dorsal deep radioulnar ligament. The pronator teres and the supinator were exposed. A Kirschner wire perpendicular to the bone on Lister tubercle of radius was inserted, then another Kirschner wire on the same level of ulnar inserted when the forearm was in neural position, which was kept parallel to the first Kirschner wire...
June 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28628067/identifying-and-describing-nurse-faculty-workload-issues-a-looming-faculty-shortage
#13
Nancy Phoenix Bittner, Cynthia Francis Bechtel
AIM: The purpose of this project was to address factors contributing to the nurse faculty shortage. BACKGROUND: There is a demonstrated need to sustain and stabilize faculty currently in the workforce to avoid exacerbating the current and future faculty shortage in nursing. Recommendations of previous studies focus on strategies for recruitment, retention, and ongoing faculty development. METHOD: A survey was employed to identify and describe the workload of nurse faculty and identify the impact of retirement and other retention issues...
July 2017: Nursing Education Perspectives
https://www.readbyqxmd.com/read/28627859/use-of-dynamic-movement-orthoses-to-improve-gait-stability-and-trunk-control-in-ataxic-patients
#14
Mariano Serrao, Carlo Casali, Alberto Ranavolo, Silvia Mari, Carmela Conte, Giorgia Chini, Luca Leonardi, Gianluca Coppola, Cherubino DI Lorenzo, Mahmoud Harfoush, Luca Padua, Francesco Pierelli
BACKGROUND: Patients with cerebellar ataxia show increased upper body movements, which have an impact on balance and walking. AIM: In this study, we investigated the effect of using dynamic movement orthoses (DMO), designed as elastic suits, on trunk motion and gait parameters. DESIGN: A longitudinal uncontrolled study. SETTING: Rehabilitative outpatient unit. POPULATION: Eleven patients (seven men, four women; mean age of 49...
June 19, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28620863/effect-of-ligamentum-teres-tear-on-the-development-of-joint-instability-and-articular-cartilage-damage-an-in-vivo-rabbit-study
#15
Jong Hun Baek, Young Soo Chun, Kee Hyung Rhyu, Wan Keun Yoon, Yoon Je Cho
The contribution of the ligamentum teres to the stabilization of the hip joint and the clinical influence of a compromised ligamentum teres are not well known. This study aimed to investigate joint stability and cartilage damage in a rabbit model by surgically inducing a complete ligamentum teres tear. Twenty adult New Zealand rabbits were used in this study. Rabbits were divided into complete ligamentum teres tear with capsulotomy (n = 9, group I) and capsulotomy only (n = 10, group II) groups. Unilateral surgery was performed on the left hip...
June 15, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28618337/biomechanical-study-of-different-fixation-techniques-for-the-treatment-of-sacroiliac-joint-injuries-using-finite-element-analyses-and-biomechanical-tests
#16
Chian-Her Lee, Ching-Chi Hsu, Po-Yuang Huang
The pelvis is one of the most stressed areas of the human musculoskeletal system due to the transfer of truncal loads to the lower extremities. Sacroiliac joint injury may lead to abnormal joint mechanics and an unstable pelvis. Various fixation techniques have been evaluated and discussed. However, it may be difficult to investigate each technique due to variations in bone quality, bone anatomy, fracture pattern, and fixation location. Additionally, the finite element method is one useful technology that avoids these variations...
June 7, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28617181/a-novel-surgical-approach-for-treating-distal-radial-extraarticular-malunion-oblique-osteotomy-with-buttress-plate-stabilization
#17
Chi-Chuan Wu
PURPOSE: Distal radial extraarticular malunions are not uncommon. However, requirements of surgical correction depend on multiple conditions. Traditionally, surgical techniques include closing or opening wedge osteotomies. Each has unique advantages and disadvantages. An oblique osteotomy was developed to simplify the revision surgery. METHODS: Forty-eight consecutive adult patients with 48 malunions were surgically treated. An oblique osteotomy of 45° vertical to the radial longitudinal axis was performed from medio-distally to latero-proximally...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28616947/the-impact-of-metalation-on-adsorption-geometry-electronic-level-alignment-and-uv-stability-of-organic-macrocycles-on-tio2-110
#18
Manuel Graf, Gerson Mette, Dominik Leuenberger, Yeliz Gurdal, Marcella Iannuzzi, Wolf-Dietrich Zabka, Stephan Schnidrig, Benjamin Probst, Jürg Hutter, Roger Alberto, Jürg Osterwalder
Metal complexes of the tetradentate bipyridine based macrocycle pyrphyrin (Pyr) have recently shown promise as water reduction catalysts in homogeneous photochemical water splitting reactions. In this study, the adsorption and metalation of pyrphyrin on stoichiometric TiO2(110) is investigated in ultrahigh vacuum by means of scanning tunneling microscopy, photoelectron spectroscopy, low-energy electron diffraction, and density functional theory. In a joint experimental and computational effort, the local adsorption geometry at low coverage, the long-range molecular ordering at higher coverage and the electronic structure have been determined for both the bare ligand and the cobalt-metalated Pyr molecule on TiO2...
June 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28616787/subtle-radiographic-signs-of-hamate-body-fracture-a-diagnosis-not-to-miss-in-the-emergency-department
#19
Nathan D Cecava, Mary F Finn, Liem T Mansfield
Hamate fractures are estimated to represent 1.7% of all carpal fractures and can occur at the hamulus (hook) or hamate body depending on mechanism of injury. Fractures of the hamate body can be exceedingly difficult to identify on standard wrist and hand radiographs in the emergency department. If the diagnosis is missed in the emergency department, orthopedic referral is often delayed. This can result in lasting functional disability for the patient, as these fractures have a propensity to destabilize the fourth and fifth carpometacarpal (CMC) joints...
June 14, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28616779/-arthrodesis-of-the-distal-interphalangeal-joint-using-the-headless-compression-screw
#20
REVIEW
C K Spies, B Hohendorff, S Löw, L P Müller, J Oppermann, P Hahn, F Unglaub
OBJECTIVE: Arthrodesis of the distal interphalangeal joint of the fingers and interphalangeal joint of the thumb in order to gain reliable stability and function. INDICATIONS: Primary and secondary osteoarthritis, rheumatoid arthritis, defect lesions, septic joint destruction, posttraumatic joint deviation, fatal joint instability, fatal tendon lesions. CONTRAINDICATIONS: Persistent infections (empyema, osteomyelitis, phlegmon), deficient soft tissue mantle, bone/screw mismatch...
June 14, 2017: Operative Orthopädie und Traumatologie
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