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https://www.readbyqxmd.com/read/27915444/outcomes-of-proximal-humeral-fracture-fixation-with-locked-cfr-peek-plating
#1
Jan Christoph Katthagen, Alexander Ellwein, Olga Lutz, Christine Voigt, Helmut Lill
PURPOSE: To investigate the outcomes of proximal humeral fracture (PHF) fixation with a novel carbon-fiber-reinforced (CFR)-PEEK plate and to compare results with outcomes after conventional locked titanium plating. METHODS: Twenty-one patients (7 male, 14 female) with operative treatment of unilateral displaced PHFs (mean age, 66.8 ± 9.9 years) with a novel CRF-PEEK plate were prospectively enrolled. Patients were followed up clinically (Constant Score, Simple Shoulder Test and Simple Shoulder Value) and radiologically 3 months postoperative and again clinically 12 months postoperative...
December 3, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/27914975/techniques-for-chronic-monitoring-of-brain-activity-in-freely-moving-sheep-using-wireless-longitudinal-eeg-recording
#2
N Perentos, A U Nicol, A Q Martins, J E Stewart, P Taylor, A J Morton
BACKGROUND: Large mammals with complex central nervous systems offer new possibilities for translational research into basic brain function. Techniques for monitoring brain activity in large mammals, however, are not as well developed as they are in rodents. NEW METHOD: We have developed a method for chronic monitoring of electroencephalographic (EEG) activity in unrestrained sheep. We describe the methods for behavioural training prior to implantation, surgical procedures for implantation, a protocol for reliable anaesthesia and recovery, methods for EEG data collection, as well as data pertaining to suitability and longevity of different types of electrodes...
November 30, 2016: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/27914663/outcome-of-alternative-approach-to-displaced-acetabular-fractures
#3
K S Park, C K Chan, G W Lee, H W Ahn, T R Yoon
INTRODUCTION: Anatomical reduction of displaced acetabular fracture is not without its' limitations and complications. This study is conducted to assess clinical and radiological outcomes as well as complications of treating displaced acetabular fractures with emphasis on anatomical reduction in weight-bearing area, mainly the posterior column, and imperfect reduction of the anterior column is acceptable. However, stability of both columns is mandatory. METHODS: It was a retrospective study carried out in a Level 1 arthroplasty and trauma centre...
November 27, 2016: Injury
https://www.readbyqxmd.com/read/27913176/rotary-ultrasonic-bone-drilling-improved-pullout-strength-and-reduced-damage
#4
Vishal Gupta, Pulak M Pandey, Vadim V Silberschmidt
Bone drilling is one of the most common operations used to repair fractured parts of bones. During a bone drilling process, microcracks are generated on the inner surface of the drilled holes that can detrimentally affect osteosynthesis and healing. This study focuses on the investigation of microcracks and pullout strength of cortical-bone screws in drilled holes. It compares conventional surgical bone drilling (CSBD) with rotary ultrasonic bone drilling (RUBD), a novel approach employing ultrasonic vibration with a diamond-coated hollow tool...
November 29, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27909754/dual-plate-fixation-on-distal-third-diaphyseal-fracture-of-the-humerus
#5
Jun-Ku Lee, Yun-Sung Choi, Young-Suk Sim, Dae-Sung Choi, Soo-Hong Han
INTRODUCTION: Displaced unstable distal third fractures of the humeral diaphysis are treated surgically through open reduction and internal fixation. Conventionally, surgeons prefer using long plates for secure fixation; however, we performed short plate dual plating for robust fixation that required a smaller incision and less dissection through an anterior approach. In this study, we report the results of dual plating of fractures of the humeral shaft, with radiographic evidence and clinical analysis...
December 1, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27909659/reliability-of-the-planned-pedicle-screw-trajectory-versus-the-actual-pedicle-screw-trajectory-using-intra-operative-3d-ct-and-image-guidance
#6
Catherine A Miller, Charles G Ledonio, Matthew A Hunt, Farhan Siddiq, David W Polly
BACKGROUND: Technological advances, including navigation, have been made to improve safety and accuracy of pedicle screw fixation. We evaluated the accuracy of the virtual screw placement (Stealth projection) compared to actual screw placement (intra-operative O-Arm) and examined for differences based on the distance from the reference frame. METHODS: A retrospective evaluation of prospectively collected data was conducted from January 2013 to September 2013. We evaluated thoracic and lumbosacral pedicle screws placed using intraoperative O-arm and Stealth navigation by obtaining virtual screw projections and intraoperative O-arm images after screw placement...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27909638/four-rod-instrumentation-for-treatment-of-charcot-spinal-arthropathy-causing-autonomic-dysreflexia-case-report-and-literature-review
#7
Stephanie Zyck, Gentian Toshkezi, John Pizzuti, Satya Marawar
Late complications of spinal cord injury can include Charcot arthropathy, in which spinal instability occurs as a result of repetitive trauma in the insensate spine. In rare cases, this can present as autonomic dysreflexia. We present the case of a 60-year-old man with longstanding C6 quadriplegia who presented with six months of hypertension, diaphoresis and dizziness. After an extensive workup, the patient's symptoms were attributed to autonomic dysreflexia in the setting of spinal instability from Charcot spinal arthropathy...
October 27, 2016: Curēus
https://www.readbyqxmd.com/read/27909498/shock-lead-dislodgement-related-to-its-small-hair-pin-curve-in-a-pocket-a-case-of-ratchet-syndrome
#8
Yuka Taguchi, Kohei Matsushita, Toshiyuki Ishikawa, Yutaka Ogino, Hirooki Matsushita, Junya Hosoda, Katsumi Matsumoto, Satoshi Umemura
There have been few reports about ratchet syndrome. We report a case of ratchet syndrome caused by small hair-pin curve of lead that triggered the lead retract itself. A 69-year-old man with a past history of inferior wall myocardial infarction, presented with progressive congestive heart failure. He underwent implantation of cardiac resynchronization therapy with an implantable cardiac defibrillator (CRTD) at our hospital. At 33 days after implantation, shock lead dislodgement was revealed. X-ray showed that the lead tip was in left subclavian vein, leaving its screw out, and a large part of the proximal portion of the lead was retracted into the pocket, while the other two leads remained in appropriate positions and the device had not rotated...
April 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27908742/arthroscopic-arthrodesis-of-the-shoulder-in-brachial-plexus-palsy
#9
Hubert Lenoir, Thomas Williams, Aude Griffart, Cyril Lazerges, Michel Chammas, Bertrand Coulet, Dominique Le Nen
BACKGROUND: Shoulder arthroscopic arthrodesis is an uncommon and non-standardized procedure. Results are poorly evaluated. We describe the findings in 8 patients who underwent shoulder arthroscopic arthrodesis for brachial plexus injury. METHODS: The humeral head and glenoid were excised through standard arthroscopic portals. A Hoffmann external fixator and cannulated screws were used to stabilize the shoulder. Standard clinical assessment and radiographic evaluation were performed each month until bony fusion occurred...
November 28, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27908615/unilaterally-posterior-lumbar-interbody-fusion-with-double-expandable-peek-cages-without-pedicle-screw-support-for-lumbar-disc-herniation
#10
Aydemir Kale, Ibrahim Ilker Oz, Ayhan Onk, Murat Kalaycı, Çağatay Büyükuysal
OBJECTIVES: Posterior lumbar interbody fusion (PLIF) is usually bilateral procedure, and it is combined with posterior by bilateral pedicle screw support or with fixation. The purpose of this retrospective study was to compare the surgical outcomes of simple discectomy and PLIF without pedicle screw support in patients with lumbar disc herniation (LDH). PATIENTS AND METHODS: 60 patients with single segment LDH were operated between February 2010 and June 2013. 40 patients were treated with simple discectomy (Group 1) and 20 patients were treated with PLIF using double expandable polyetheretherketone (PEEK) cages without instrumentation (Group 2) unilaterally...
November 17, 2016: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/27908492/fragility-fractures-of-the-ankle-in-the-elderly-open-reduction-and-internal-fixation-versus-tibio-talo-calcaneal-nailing-short-term-results-of-a-prospective-randomized-controlled-study
#11
D Georgiannos, V Lampridis, I Bisbinas
INTRODUCTION: The management of ankle fractures in the elderly remains unpredictable, secondary to their various co-morbidities. Although tibiotalocalcaneal (TTC) nailing has been an effective option for ankle arthrodesis due to ankle arthritis or Charcot arthropathy there are few reports regarding the use of TTC nail for the treatment of ankle fractures. PURPOSE: Aim of this study was to compare the results of ORIF versus TTC nailing for the treatment of unstable ankle fractures in the elderly...
November 17, 2016: Injury
https://www.readbyqxmd.com/read/27906743/vertebral-body-hounsfield-units-are-associated-with-cage-subsidence-after-transforaminal-lumbar-interbody-fusion-with-unilateral-pedicle-screw-fixation
#12
Jie Mi, Kang Li, Xin Zhao, Chang-Qing Zhao, Hua Li, Jie Zhao
OBJECTIVE: To assess the association between Hounsfield units (HU) measurement and cage subsidence after lumbar interbody fusion. BACKGROUND: Transforaminal lumbar interbody fusion (TLIF) with unilateral fixation becomes a popular treatment modality for lumbar degenerative disease. Cage subsidence is a potentially devastating complication after lumbar interbody fusion with unilateral fixation. Recently, a new technique for assessing bone mineral density using HU values from computed tomography has been proposed...
November 30, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27905320/nanoporous-nanocomposite-membranes-via-hybrid-twin-screw-extrusion-multijet-electrospinning
#13
Semra Senturk-Ozer, Seda Aktas, Jing He, Frank T Fisher, Dilhan M Kalyon
Non-woven nanoporous membranes of poly(caprolactone), PCL, incorporated with multi-walled carbon nanotubes, CNTs, could be fabricated via an industrially-scalable hybrid twin screw extrusion and electrospinning process. The utilization of a spinneret with multiple nozzles allowed the increase of the flow rate beyond what is possible with conventional electrospinning using a single nozzle, albeit at the expense of difficulties in the control of the thickness distributions of the nanofibrous membranes. The thickness and orientation distributions and the resulting mechanical properties of the membranes could be modified via changes in voltage, angular velocity of the collector mandrel and separation distance of the collector from the spinneret...
December 1, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27903299/arthroscopic-arthrodesis-for-ankle-arthritis-without-bone-graft
#14
Xiaojun Duan, Liu Yang, Li Yin
BACKGROUND: Ankle arthrodesis is considered by many to be the standard operative treatment for end-stage ankle arthritis. The purpose of this study was to perform a new technique for ankle joint surface and determine the outcome for the union rates of ankle arthroscopic arthrodesis. METHODS: A total of 68 patients with posttraumatic arthritis, primary osteoarthritis, and rheumatoid arthritis were treated by ankle arthroscopic arthrodesis between May 2007 and December 2012...
December 1, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27903193/three-dimensional-assessment-of-the-effects-of-high-density-embolization-material-on-the-absorbed-dose-in-the-target-for-gamma-knife-radiosurgery-of-arteriovenous-malformations
#15
Yoichi Watanabe, Divyajot Sandhu, Leighton Warmington, Sean Moen, Ramachandra Tummala
OBJECTIVE Arteriovenous malformation (AVM) is an intracranial vascular disorder. Gamma Knife radiosurgery (GKRS) is used in conjunction with intraarterial embolization to eradicate the nidus of AVMs. Clinical results indicate that patients with prior embolization tend to gain less benefit from GKRS. The authors hypothesized that this was partly caused by dosimetric deficiency. The actual dose delivered to the target may be smaller than the intended dose because of increased photon attenuation by high-density embolic materials...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27902850/biomechanical-comparison-of-2-veterinary-locking-plates-to-monocortical-screw-polymethylmethacrylate-fixation-in-canine-cadaveric-cervical-vertebral-column
#16
Bianca F Hettlich, Geoffrey T Fosgate, Alan S Litsky
OBJECTIVE: To compare the biomechanical properties of 2 veterinary locking plates and monocortical screws/polymethylmethacrylate (PMMA) fixation in canine cadaveric cervical vertebral columns. STUDY DESIGN: Biomechanical cadaveric study. MATERIALS: Nineteen cervical vertebral columns (C2-C7) from large breed, skeletally mature, canine cadavers were used. A cortical ring was placed as a disk spacer at C4-C5 in all specimens. Seven vertebral columns were plated at C4-C5 with two 4-hole, 3...
November 30, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27902591/a-novel-indication-for-a-method-in-the-treatment-of-lumbar-tuberculosis-through-minimally-invasive-extreme-lateral-interbody-fusion-xlif-in-combination-with-percutaneous-pedicle-screws-fixation-in-an-elderly-patient-a-case-report
#17
Qiyou Wang, Yichun Xu, Ruiqiang Chen, Jianwen Dong, Bin Liu, Limin Rong
RATIONALE: To describe a novel indication for a method through minimally invasive extreme lateral interbody fusion (XLIF) in combination with percutaneous pedicle screwsfixation in the treatment of lumbar tuberculosis (TB) in an elderly patient, and its clinical efficacy and feasibility. Lumbar TB is a destructive form of TB. Antituberculous treatment should be started as early as possible. In some circumstances, however, surgical debridement with or without stabilization of the spine appears to be beneficial and may be recommended...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27902168/biomechanical-comparison-of-pullout-strengths-of-five-cortical-screw-types-an-innovative-measurement-method
#18
Ahmet Karakaşlı, Nihat Acar, Mehmet Hilal Özcanhan, Fatih Ertem
OBJECTIVES: This study aims to assess five different cortical screw types using artificial femurs, under equated testing conditions. MATERIALS AND METHODS: We investigated the maximum force needed to cause deformation at screw-bone interface using fourth generation composite femurs by conducting separate pullout tests for each screw type. We normalized obtained results with traditional methods and cross-comparison. To conduct pullout tests dependent on screw dimensions, we eliminated the effect of bicortical bone thickness by equalizing the conditions of screw insertion...
December 2016: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/27902166/is-intramedullary-nailing-applicable-for-distal-tibial-fractures-with-ankle-joint-extension
#19
Ozan Beytemür, Cem Albay, Oktay Adanır, Serdar Yüksel, Mehmet Akif Güleç
OBJECTIVES: This study aims to evaluate the functional and radiographic results and treatment complications of AO/OTA (Arbeitsgemeinschaft fur Osteosynthesefragen/Orthopaedic Trauma Association) type 43C1 and C2 fractures treated with intramedullary nailing. PATIENTS AND METHODS: We retrospectively evaluated 35 AO/OTA type 43C1 and C2 patients (26 males, 9 females; mean age 39.8±16.9 years; range 19 to 82 years) treated with intramedullary nailing. Two interfragmentary screws out of nail were applied in 10 patients (29%), while one interfragmentary screw out of nail was applied in 17 patients (49%)...
December 2016: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/27900714/is-there-asymmetry-between-the-concave-and-convex-pedicles-in-adolescent-idiopathic-scoliosis-a-ct-investigation
#20
Colin M Davis, Caroline A Grant, Mark J Pearcy, Geoffrey N Askin, Robert D Labrom, Maree T Izatt, Clayton J Adam, J Paige Little
BACKGROUND: Adolescent idiopathic scoliosis is a complex three-dimensional deformity of the spine characterized by deformities in the sagittal, coronal, and axial planes. Spinal fusion using pedicle screw instrumentation is a widely used method for surgical correction in severe (coronal deformity, Cobb angle > 45°) adolescent idiopathic scoliosis curves. Understanding the anatomic difference in the pedicles of patients with adolescent idiopathic scoliosis is essential to reduce the risk of neurovascular or visceral injury through pedicle screw misplacement...
November 29, 2016: Clinical Orthopaedics and related Research
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