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https://www.readbyqxmd.com/read/28449194/center-of-pressure-profiles-in-unilateral-compared-to-bilateral-end-stage-ankle-osteoarthritis-patients
#1
Jonathan R Gladish, Douglas W Powell, Lindsey E Allison, Robin M Queen
Ankle osteoarthritis compromises ankle joint stability in regards to static balance. Unilateral and bilateral osteoarthritis patients often exhibit different limb-loading patterns during static balance tasks. Symmetrical loading has been posited to improve balance performance. Therefore, the purpose of this study was to quantify balance performance in both ankle osteoarthritis patient groups. Twenty-two unilateral and twenty-one bilateral ankle osteoarthritis patients performed three 10-second quiet standing trials with their feet together...
April 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28448709/-ankle-arthroscopy-in-treatment-of-bosworth-fracture
#2
D Saraiva, R Pereira, A Sarmento, R Lemos, X M Oliva
The Bosworth fracture is a pattern of fracture-dislocation of the ankle joint with fixed dislocation of the proximal part of the fibula behind the posterior malleolus. It is a rare injury, which requires high index of suspicion for diagnosis. Fixed dislocation of the fibula does not allow for closed reduction, so open reduction and fixation of fibula or tibia is required. We present a case report of a patient who suffered a Bosworth fracture, with associated medial malleolus fracture. She underwent surgical treatment with open reduction and internal fixation of the fibula and tibia...
September 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28448704/-retrograde-intramedullary-nail-fixation-for-charcot-neuroarthropathy
#3
E López-Gavito, N A Gómez-Fuentes, P Parra-Téllez, M Lezama-Peniche, J Vázquez-Escamilla, S R León-Hernández
Charcot arthropathy is defined as an articular degenerative, chronic, progressive disease that affects one or more peripheral joints, develops as a result of a failure in the normal sensory perception (pain and proprioception) in the innervation of joints located in the foot and ankle, is characterized by destructive bone lesions without the presence of infection. Neuropathy is directly associated with diabetes mellitus type 1 and 2. Surgery is indicated when there is severe involvement of soft tissue, foot joints are unstable, at the presence of chronic or recurrent ulcers or when the foot and ankle can not fit to a normal shoe, and had limitation to perform activities of daily living...
September 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28443177/atlantoaxial-stabilization-using-c1-and-c2-laminar-screw-fixation
#4
Takashi Tsuji, Kazuhiro Chiba, Yosuke Horiuchi, Tadahisa Urabe, Shota Fujita, Morio Matsumoto
We describe the use of a C1 laminar screw in combination with a C2 laminar screw as a salvage technique to treat two patients, one with persistent first intersegmental artery and the other with vertebral artery occlusion after cervical spine fracture. The combined use of C1 and C2 laminar screws allows for good fixation of the atlantoaxial joint with a lower risk of vertebral artery injury; therefore, it can be an alternative surgical procedure for patients with congenital or traumatic anomalous vertebral artery...
April 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28442207/tibio-talo-calcaneal-fusion-after-limb-salvage-procedures-a-retrospective-study
#5
Lukas Zak, Gerald E Wozasek
BACKGROUND: The treatment of limb threatening trauma on the distal tibia or hindfoot often results in posttraumatic osteoarthritis requiring tibiotalocalcaneal (TTC) arthrodesis. The purpose of this study was to present a case series of patients undergoing various techniques of joint fusion after bone reconstruction and deformity correction as a salvage procedure. The study should help trauma surgeons making decisions in limb salvage and deformity correction in complex lower leg and foot injuries by presenting options and treatment strategies...
April 15, 2017: Injury
https://www.readbyqxmd.com/read/28442161/zurich-cementless-total-hip-replacement
#6
REVIEW
David Hummel
Total hip replacement (THR) is the gold standard treatment of intractable pain from hip dysplasia. THR procedures are divided into 2 main categories: cemented and cementless, with hybrid a combination. The Zurich Cementless THR system uses a combination of press-fit (acetabular component) and locking screw (femoral component) fixation designed to address the main challenge facing cemented systems (aseptic loosening) while providing the benefit of immediate stability with its novel locking screw implantation system for the femoral stem...
April 22, 2017: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/28441007/rough-structure-of-electrodeposition-as-a-template-for-an-ultra-robust-self-cleaning-surface
#7
Yongquan Qing, Chuanbo Hu, Chuanning Yang, Kai An, Fawei Tang, Junyan Tan, Changsheng Liu
Superhydrophobic surfaces with self-cleaning properties have developed, based on roughness on the micro/nanometer scales and low-energy surfaces. However, such surfaces are fragile and stop functioning when exposed to oil. Addressing these challenges, here we show an ultra-robust self-cleaning surface fabricated by a process of metal electrodeposition of a rough structure that is subsequently coated with a fluorinated metal-oxide nanoparticles. Scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction were employed to characterize the surfaces...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28438418/radiological-evaluation-of-ankle-arthrodesis-with-ilizarov-fixation-compared-to-internal-fixation
#8
Piotr Morasiewicz, Maciej Dejnek, Wiktor Urbański, Szymon Łukasz Dragan, Mirosław Kulej, Szymon Feliks Dragan
INTRODUCTION: We asked whether the type of ankle joint arthrodesis stabilization will affect: (1) rate of union, (2) rate of adjacted-joint arthritis, (3) malalignment of the ankle joint. MATERIAL AND METHODS: We retrospectively radiological studied 62 patients who underwent ankle arthrodesis with Ilizarov external fixator stabilization (group 1,n=29) or internal stabilization (group 2,n=33) from 2006 to 2015. Radiologic outcomes were mesure by: (1) rate of union, (2) rate of adjacent-joint arthritis, (3) malalignment of the ankle joint...
April 13, 2017: Injury
https://www.readbyqxmd.com/read/28435576/a-new-technique-for-solving-tightrope-cutout-during-acromioclavicular-joint-fixation-a-case-report
#9
B W Ng, A F Abdullah, S Nadarajah
Acromioclavicular joint (ACJ) dissociation is one of the common injuries affecting adults. The stability of ACJ largely depends on the integrity of acromioclavicular ligament, coracoclavicular ligament, capsule, trapezius muscle and deltoid muscle. The injury has been classified by Rockwood into six types and treatment options can be guided by the classification. TightRope fixation is one of the many surgical procedures available to address acromioclavicular joint separation. It consists of tensioning of a no...
March 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28434280/use-of-a-custom-made-limb-press-model-to-assess-intra-and-extracapsular-techniques-for-treating-cranial-cruciate-ligament-rupture-in-cats
#10
Wolfgang Kneifel, Danilo Borak, Barbara Bockstahler, Eva Schnabl-Feichter
Objectives This study aimed to compare the under-and-over technique, a type of intracapsular treatment, and the standard fabella-tibial suture, a method for extracapsular treatment, in achieving immediate, postoperative stifle stability after cranial cruciate ligament (CrCL) rupture by using a feline, custom-made limb-press model. Methods Cadaveric feline hindlimb specimens (n = 14) were positioned in the limb press at predefined joint angles (stifle joint: 120°; hock joint: 120°), and vertical loads of 5%, 10%, 20% and 30% body weight were applied statically...
April 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28433391/mechanisms-of-anterior-posterior-stability-of-the-knee-joint-under-load-bearing
#11
Ryan J Reynolds, Peter S Walker, John Buza
The anterior-posterior (AP) stability of the knee is an important aspect of functional performance. Studies have shown that the stability increases when compressive loads are applied, as indicated by reduced laxity, but the mechanism has not been fully explained. A test rig was designed which applied combinations of AP shear and compressive forces, and measured the AP displacements relative to the neutral position. Five knees were evaluated at compressive loads of 0, 250, 500, and 750N, with the knee at 15° flexion...
April 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28432523/hypothesis-free-analyses-from-a-large-psoriatic-arthritis-cohort-support-merger-to-consolidated-peripheral-arthritis-definition-without-subtyping
#12
Daniel Stekhoven, Almut Scherer, Michael J Nissen, Véronique Grobéty, Nikhil Yawalkar, Peter M Villiger, Burkhard Möller
Current ClASsification criteria for Psoriatic ARthritis classification criteria for psoriatic arthritis (PsA) provide a preliminary definition of inflammatory articular disease. This study aimed to further characterize PsA peripheral arthritis using purely data-driven approaches for the affected joint distribution pattern. PsA patients from the Swiss Clinical Quality Management in Rheumatic Diseases (SCQM) database were clustered according to similarities in 66 swollen and in 68 tender joints. Clusters were compared in terms of other disease characteristics and studied for coincidence with traditional PsA subtypes, stability over time and treatment response upon first tumour necrosis factor alpha (TNF-α) therapy...
April 22, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28431561/the-evaluation-of-the-role-of-medial-collateral-ligament-maintaining-knee-stability-by-a-finite-element-analysis
#13
Dong Ren, Yueju Liu, Xianchao Zhang, Zhaohui Song, Jian Lu, Pengcheng Wang
BACKGROUND: A three-dimensional finite element model (FEM) of the knee joint was established to analyze the biomechanical functions of the superficial and deep medial collateral ligaments (MCLs) of knee joints and to investigate the treatment of the knee medial collateral ligament injury. METHODS: The right knee joint of a healthy male volunteer was subjected to CT and MRI scans in the extended position. The scanned data were imported into MIMICS, Geomagic, and ANSYS software to establish a three-dimensional FEM of the human knee joint...
April 21, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28428910/role-of-the-interosseous-membrane-in-preventing-distal-radioulnar-gapping
#14
Frederick W Werner, Matthew R LeVasseur, Brian J Harley, Ashley Anderson
Background Damage to the interosseous membrane (IOM) can alter load transmission between the radius and ulna and decrease their axial stability. Less is known about the effect of IOM sectioning on the transverse stability between the radius and ulna. Purpose The purpose of this study was to quantify the radioulnar gapping at the distal radioulnar joint (DRUJ) during forearm rotation when the IOM was experimentally sectioned while maintaining the integrity of the distal radioulnar ligaments. Methods In 12 fresh-frozen cadaver forearms tested in a combined wrist-forearm simulator, the increase in gap between the radius and ulna, at the level of the DRUJ, was determined during cyclic forearm rotation following IOM sectioning...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28428909/a-biomechanical-perspective-on-distal-radioulnar-joint-instability
#15
Shohei Omokawa, Akio Iida, Kenji Kawamura, Yasuaki Nakanishi, Takamasa Shimizu, Tsutomu Kira, Tadanobu Onishi, Naoki Hayami, Yasuhito Tanaka
Background The purpose of this article was to review the anatomy, kinematics of the distal radioulnar joint (DRUJ), and to discuss definition, classification, and diagnosis of DRUJ instability. Methods A biomechanical perspective on physical examination of DRUJ ballottement test was documented. Physiological dynamic DRUJ translation and differences of the translation following sequential ligament sectioning and changes in different forearm and wrist positions were demonstrated. The clinical significance of each ligament's contribution to joint stability in specific wrist positions was addressed...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28427871/arthroscopic-assisted-coracoclavicular-ligament-reconstruction-for-acute-acromioclavicular-dislocation-using-2-clavicular-and-1-coracoid-cortical-fixation-buttons-with-suture-tapes
#16
Sang-Jin Shin, Yoon Sang Jeon, Rag Gyu Kim
PURPOSE: To introduce an arthroscopically assisted coracoclavicular (CC) fixation technique using a cortical fixation button device and to evaluate the clinical and radiologic outcomes in patients with acute acromioclavicular (AC) dislocation who were treated with the technique. METHODS: Twenty-one consecutive patients with grade III and V acute AC dislocation who underwent arthroscopically assisted CC ligament reconstruction using a cortical fixation button device were prospectively enrolled...
April 17, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28424860/influence-of-tibial-hybrid-fixation-on-graft-tension-and-stability-in-acl-double-bundle-reconstruction
#17
B H Drews, A Seitz, J Huth, G Bauer, A Ignatius, L Dürselen
PURPOSE: Initial graft tension in anterior cruciate ligament (ACL) reconstruction affects stability and tension loss at follow-up. This study investigated the influence of hybrid tibial fixation in 3-tunnel double-bundle ACL reconstruction on initial graft tension and tension change and stability under anterior and combined rotatory loads. METHODS: Eleven fresh-frozen cadaveric knees were reconstructed with an ACL double bundle using a 3-tunnel technique. Grafts were tightened to 80 N in 60° (AM bundle) and 15° (PL bundle) of flexion...
April 19, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28424050/in-the-quest-for-degenerative-lumbar-spinal-stenosis-etiology-the-schmorl-s-nodes-model
#18
Janan Abbas, Viviane Slon, Dan Stein, Natan Peled, Israel Hershkovitz, Kamal Hamoud
BACKGROUND: Degenerative lumbar spinal stenosis (DLSS) is a common health problem in the elderly and usually associated with three-joint complex degeneration. Schmorl's nodes (SNs) are described as vertical herniation of the disc into the vertebral body through a weakened part of the end plate that can lead to disc degeneration. Since SNs can harm the spine unit stability, the association between DLSS and SNs is expected. The aim of this study is to shed light on the relationship between degenerative lumbar spinal stenosis and SNs...
April 20, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28422648/fast-and-stable-signal-deconvolution-via-compressible-state-space-models
#19
Abbas Kazemipour, Ji Liu, Krystyna Solarana, Daniel Nagode, Patrick Kanold, Min Wu, Behtash Babadi
OBJECTIVE: Common biological measurements are in the form of noisy convolutions of signals of interest with possibly unknown and transient blurring kernels. Examples include EEG and calcium imaging data. Thus, signal deconvolution of these measurements is crucial in understanding the underlying biological processes. The objective of this paper is to develop fast and stable solutions for signal deconvolution from noisy, blurred and undersampled data, where the signals are in the form of discrete events distributed in time and space...
April 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28420541/stability-of-lisfranc-injury-fixation-in-thiel-cadavers-is-routine-fixation-of-the-1st-and-3rd-tarsometatarsal-joint-necessary
#20
Alistair I W Mayne, Robert Lawton, Stephen Dalgleish, Fraser Harrold, George Chami
BACKGROUND: There is debate as to whether a home run screw (medial cuneiform to 2nd metatarsal base) combined with k-wire fixation of the 4th & 5th tarsometatarsal joints is sufficient to stabilise Lisfranc injuries or if fixation of the 1st and 3rd tarsometatarsal joints is also required. Unlike the 2nd, 4th and 5th tarsometatarsal joints, stabilisation of the 1st and 3rd requires either intra-articular screw or an extra-articular plate which risk causing chondrolysis and/or osteoarthritis...
April 11, 2017: Injury
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