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https://www.readbyqxmd.com/read/29457483/sensitivity-of-the-saline-load-test-for-traumatic-arthrotomy-of-the-ankle-with-ankle-arthroscopy-simulation
#1
Daniel D Bohl, Rachel M Frank, Simon Lee, Kamran S Hamid, George B Holmes, Johnny Lin, Simon Lee
BACKGROUND: The saline load test has been used to evaluate for traumatic arthrotomy in orthopaedics. The purpose of this study was to determine the volume of saline required to detect traumatic arthrotomy of the ankle. METHODS: Forty-two patients undergoing elective ankle arthroscopy were prospectively enrolled. For each patient, a standard 4-mm anteromedial portal was established. Next, an 18-gauge needle was inserted at the site of the anterolateral portal. Sterile saline was slowly injected through the needle until saline extravasated from the anteromedial portal...
February 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29451935/economic-analysis-of-anatomic-plating-versus-tubular-plating-for-the-treatment-of-fibula-fractures
#2
Gerard Chang, Suneel B Bhat, Steven M Raikin, Justin M Kane, Andrew Kay, Jamal Ahmad, David I Pedowitz, James Krieg
Ankle fractures are among the most common injuries requiring operative management. Implant choices include one-third tubular plates and anatomically precontoured plates. Although cadaveric studies have not revealed biomechanical differences between various plate constructs, there are substantial cost differences. This study sought to characterize the economic implications of implant choice. A retrospective review was undertaken of 201 consecutive patients with operatively treated OTA type 44B and 44C ankles...
February 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29442653/effect-of-titania-concentration-in-bioglass-tio%C3%A2-nanostructures-and-its-in-vitro-biological-property-assessment
#3
P Bargavi, S Chitra, D Durgalakshmi, P Rajashree, S Balakumar
Bioglass 45S5 (45% SiO2-24.5% NaO-24.5% CaO-6% P2O5) is a unique bioactive material, which is being used for bone and dental substitution. This system has been highly preferred for its osteoconductive and osteoinductive performance. Despite its attractive bioactivity, there are limitations in using this material for orthopedic and dental applications due to its poor processability and mechanical strength. To improve the load-sharing and stress distribution, TiO2 nanoparticles have been introduced into the nanoBioglass (nBG) by sol-gel method...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29430493/preoperative-sterilization-preparation-of-the-shoulder-a-comparative-study-evaluating-gauze-sponge-and-commercially-available-applicator-prep-stick
#4
Usman Ali M Syed, Adam J Seidl, Ryan A Hoffman, Justin Bianchini, Pedro K Beredjiklian, Joseph A Abboud
Background: Surgical site infection (SSI) remains a concern in shoulder surgery, especially during arthroplasty. While many studies have explored the characteristics and efficacy of different sterilizing solutions, no study has evaluated the method of application. The purpose of this study was to compare two popular pre-surgical preparatory applications (two 4 x 4 cm gauze sponges and applicator stick) in their ability to cover the skin of the shoulder. Methods: Two orthopedic surgeons simulated the standard pre-surgical skin preparation on 22 shoulders of volunteer subjects...
January 2018: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29427059/arthroplanner-a-surgical-planning-solution-for-acromioplasty
#5
Caecilia Charbonnier, Sylvain Chagué, Bart Kevelham, Delphine Preissmann, Frank C Kolo, Olivier Rime, Alexandre Lädermann
PURPOSE: We present a computer-assisted planning solution "ArthroPlanner" for acromioplasty based on 3D anatomical models, computed tomography and joint kinematic simulations. METHODS: In addition to a standard static clinical evaluation (anamnesis, radiological examination), the software provides a dynamic assessment of the shoulder joint by computing in real time the joint kinematics from a database of activities of daily living. During motion, the precise bone resection (location and amount) is computed based on detected subacromial impingements, providing surgeons with precise information about the surgical procedure...
February 9, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29427011/self-learning-computers-for-surgical-planning-and-prediction-of-postoperative-alignment
#6
Renaud Lafage, Sébastien Pesenti, Virginie Lafage, Frank J Schwab
PURPOSE: In past decades, the role of sagittal alignment has been widely demonstrated in the setting of spinal conditions. As several parameters can be affected, identifying the driver of the deformity is the cornerstone of a successful treatment approach. Despite the importance of restoring sagittal alignment for optimizing outcome, this task remains challenging. Self-learning computers and optimized algorithms are of great interest in spine surgery as in that they facilitate better planning and prediction of postoperative alignment...
February 9, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29414477/effect-of-porous-orthopaedic-implant-material-and-structure-on-load-sharing-with-simulated-bone-ingrowth-a-finite-element-analysis-comparing-titanium-and-peek
#7
R Dana Carpenter, Brett S Klosterhoff, F Brennan Torstrick, Kevin T Foley, J Kenneth Burkus, Christopher S D Lee, Ken Gall, Robert E Guldberg, David L Safranski
Osseointegration of load-bearing orthopaedic implants, including interbody fusion devices, is critical to long-term biomechanical functionality. Mechanical loads are a key regulator of bone tissue remodeling and maintenance, and stress-shielding due to metal orthopaedic implants being much stiffer than bone has been implicated in clinical observations of long-term bone loss in tissue adjacent to implants. Porous features that accommodate bone ingrowth have improved implant fixation in the short term, but long-term retrieval studies have sometimes demonstrated limited, superficial ingrowth into the pore layer of metal implants and aseptic loosening remains a problem for a subset of patients...
January 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29413616/stimulation-of-cell-responses-and-bone-ingrowth-into-macro-microporous-implants-of-nano-bioglass-polyetheretherketone-composite-and-enhanced-antibacterial-activity-by-release-of-hinokitiol
#8
Jue Zhang, Wu Wei, Lili Yang, Yongkang Pan, Xuehong Wang, Tinglan Wang, Songchao Tang, Yuan Yao, Hua Hong, Jie Wei
Poor osteogenesis and bacterial infection lead to the failure of implants, thus enhancements of osteogenic activity and antibacterial activity of the implants have significances in orthopedic applications. In this study, macro-microporous bone implants of nano-bioglass (nBG) and polyetheretherketone (PK) composite (mBPC) were fabricated. The results indicated that the mBPC with the porosity of around 70% exhibited interconnected macropores (sizes of about 400 μm) and micropores (sizes of about 10 μm)...
January 31, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29408735/lithium-doped-silica-nanospheres-poly-dopamine-composite-coating-on-polyetheretherketone-to-stimulate-cell-responses-improve-bone-formation-and-osseointegration
#9
Jue Zhang, Liang Cai, Tinglan Wang, Songchao Tang, Quan Li, Tingting Tang, Shicheng Wei, Jun Qian, Jie Wei, Jiacan Su
Osseointegration is crucial for early fixation as well as long-term success of orthopedic implants. Bioactive composite containing lithium doping silica nanospheres (LSNs) and poly(dopamine) (PDA) were coated on polyetheretherketone (PK) surface (LPPK), and effects of the LSNs/PDA composite (LPC) coating on the biological properties of LPPK were assessed both in vitro and in vivo. Results showed that LPPK with improved bioactivity remarkably promoted apatite mineralization in simulated body fluid (SBF) compared with PDA coated on PK (PPK) and PK...
January 30, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29407714/plasma-activation-of-tap-water-using-dbd-for-agronomy-applications-identification-and-quantification-of-long-lifetime-chemical-species-and-production-consumption-mechanisms
#10
F Judée, S Simon, C Bailly, T Dufour
Cold atmospheric plasmas are weakly ionized gases that can be generated in ambient air. They produce energetic species (e.g. electrons, metastables) as well as reactive oxygen species, reactive nitrogen species, UV radiations and local electric field. Their interaction with a liquid such as tap water can hence change its chemical composition. The resulting "plasma-activated liquid" can meet many applications, including medicine and agriculture. Consequently, a complete experimental set of analytical techniques dedicated to the characterization of long lifetime chemical species has been implemented to characterize tap water treated using cold atmospheric plasma process and intended to agronomy applications...
December 20, 2017: Water Research
https://www.readbyqxmd.com/read/29407138/microwave-assisted-coating-of-bioactive-amorphous-magnesium-phosphate-amp-on-polyetheretherketone-peek
#11
Yufu Ren, Prabaha Sikder, Boren Lin, Sarit B Bhaduri
Polyetheretherketone (PEEK) with great thermal and chemical stability, desirable mechanical properties and promising biocompatibility is being widely used as orthopedic and dental implant materials. However, the bioinert surface of PEEK can hinder direct osseointegration between the host tissue and PEEK based implants. The important signatures of this paper are as follows. First, we report for the formation of osseointegrable amorphous magnesium phosphate (AMP) coating on PEEK surface using microwave energy...
April 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29406347/the-cost-effectiveness-of-surgical-fixation-of-distal-radial-fractures-a-computer-model-based-evaluation-of-three-operative-modalities
#12
Prashant V Rajan, Rameez A Qudsi, George S M Dyer, Elena Losina
BACKGROUND: There is no consensus on the optimal fixation method for patients who require a surgical procedure for distal radial fractures. We used cost-effectiveness analyses to determine which of 3 modalities offers the best value: closed reduction and percutaneous pinning, open reduction and internal fixation, or external fixation. METHODS: We developed a Markov model that projected short-term and long-term health benefits and costs in patients undergoing a surgical procedure for a distal radial fracture...
February 7, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29401368/three-dimensional-technologies-in-orthopedics
#13
Panayiotis J Papagelopoulos, Olga D Savvidou, Panagiotis Koutsouradis, George D Chloros, Ioanna K Bolia, Vasileios I Sakellariou, Vasileios A Kontogeorgakos, Ioannis I Mavrodontis, Andreas F Mavrogenis, Panos Diamantopoulos
New 3-dimensional digital technologies are revolutionizing orthopedic clinical practice, allowing structures of any complexity to be manufactured in just hours. Such technologies can make surgery for complex cases more precise, more cost-effective, and possibly easier to perform. Applications include pre-operative planning, surgical simulation, patient-specific instrumentation and implants, bioprinting, prosthetics, and orthotics. The basic principles of 3- dimensional technologies, including imaging, design, numerical simulation, and printing, and their current applications in orthopedics are reviewed...
January 1, 2018: Orthopedics
https://www.readbyqxmd.com/read/29401090/orthopaedic-trauma-association-annual-meeting-program-committee-analysis-of-impact-of-committee-size-and-review-process-on-abstract-acceptance
#14
Nathan N O'Hara, Gerard P Slobogean, Min Zhan, Michael J Gardner, Michael D McKee, Sharon M Moore, Thomas F Higgins, Robert V O'Toole
OBJECTIVE: To evaluate whether scientific abstracts selected for podium presentation at the Orthopaedic Trauma Association (OTA) Annual Meeting differ based on program committee size and/or the proportion of abstracts each committee member evaluates. METHODS: Abstract scores from the OTA program committee from 2010 through 2016 were obtained. All members (range, 8-9) reviewed each clinical abstract (range, 506-778) each year in a blinded fashion. The 90 top-scoring abstracts were considered "accepted" for this study...
January 26, 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29377054/mechanical-testing-of-epiphysiodesis-screws
#15
Brett M Normandin, David J Tennent, Todd H Baldini, Alesia M Blanchard, Jason T Rhodes
Epiphysiodesis is performed to treat leg-length discrepancies and angular deformities in children. However, when placed across a physis to modulate growth, screws can bend or break postoperatively. This study evaluated the mechanical properties of 3 different screw designs commonly used when performing an epiphysiodesis. Six 4.0-mm cannulated, fully threaded; six 4.0-mm cannulated, partially threaded; and six 4.0-mm noncannulated, partially threaded cancellous screws underwent cantilever bending and tension testing in a simulated physis...
January 25, 2018: Orthopedics
https://www.readbyqxmd.com/read/29363359/touch-surgery-analysis-and-assessment-of-validity-of-a-hand-surgery-simulation-app
#16
Jacob Tulipan, Andrew Miller, Andrew G Park, Joseph T Labrum, Asif M Ilyas
BACKGROUND: Surgical educators are increasingly exploring surgical simulation and other nonclinical teaching adjuncts in the education of trainees. The simulators range from purpose-built machines to inexpensive smartphone or tablet-based applications (apps). This study evaluates a free surgery module from one such app, Touch Surgery, in an effort to evaluate its validity and usefulness in training for hand surgery procedures across varied levels of surgical experience. METHODS: Participants were divided into 3 cohorts: fellowship-trained hand surgeons, orthopedic surgery residents, and medical students...
January 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29358491/ketamine-procedural-sedation-in-the-emergency-department-of-an-urban-tertiary-hospital-in-dar-es-salaam-tanzania
#17
Zlatan Coralic, Hendry R Sawe, Juma A Mfinanga, Alfredo Cortez, Jennifer Koehl, Hannah Siroker, Teri A Reynolds
STUDY OBJECTIVE: We describe ketamine procedural sedations and associated adverse events in low-acuity and high-acuity patients in a resource-limited ED. METHODS: This was a prospective observational study of ketamine procedural sedations at the Emergency Medical Department at the Muhimbili National Hospital in Dar es Salaam, Tanzania. We observed consecutive procedural sedations and recorded patient demographics, medications, vital signs, pulse oximetry, capnography and a priori defined adverse events (using standard definitions in emergency medicine sedation guidelines)...
January 22, 2018: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29349530/photocatalytic-activity-of-attapulgite-tio2-ag3po4-ternary-nanocomposite-for-degradation-of-rhodamine-b-under-simulated-solar-irradiation
#18
Hongcai He, Zhuolin Jiang, Zhaoling He, Tao Liu, Enzhu Li, Bao-Wen Li
An excellent ternary composite photocatalyst consisting of silver orthophosphate (Ag3PO4), attapulgite (ATP), and TiO2 was synthesized, in which heterojunction was formed between dissimilar semiconductors to promote the separation of photo-generated charges. The ATP/TiO2/Ag3PO4 composite was characterized by SEM, XRD, and UV-vis diffuse reflectance spectroscopy. The co-deposition of Ag3PO4 and TiO2 nanoparticles onto the surface of ATP forms a lath-particle structure. Compared with composite photocatalysts consisting of two phases, ATP/TiO2/Ag3PO4 ternary composite exhibits greatly improved photocatalytic activity for degradation of rhodamine B under simulated solar irradiation...
January 18, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29340933/forces-generated-by-vastus-lateralis-and-vastus-medialis-decrease-with-increasing-stair-descent-speed
#19
Elena J Caruthers, Kassandra K Oxendale, Jacqueline M Lewis, Ajit M W Chaudhari, Laura C Schmitt, Thomas M Best, Robert A Siston
Stair descent (SD) is a common, difficult task for populations who are elderly or have orthopaedic pathologies. Joint torques of young, healthy populations during SD increase at the hip and ankle with increasing speed but not at the knee, contrasting torque patterns during gait. To better understand the sources of the knee torque pattern, we used dynamic simulations to estimate knee muscle forces and how they modulate center of mass (COM) acceleration across SD speeds (slow, self-selected, and fast) in young, healthy adults...
January 16, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29327379/influence-of-varying-stem-and-metaphyseal-sleeve-size-on-the-primary-stability-of-cementless-revision-tibial-trays-used-to-reconstruct-aori-iia-defects-a-simulation-study
#20
Maged Awadalla, Rami M A Al-Dirini, Dermot O'Rourke, Lucian Bogdan Solomon, Mark Heldreth, Mark Taylor
Traditionally, diaphyseal stems have been utilized to augment the stability of revision total knee replacement (rTKR) implants. More recently metaphyseal augments, such as sleeves, have been introduced to further augment component fixation. The effect of augments such as stems and sleeves have on the primary stability of a rTKR implant is poorly understood, however it has important implications on the complexity, costs and survivorship of the procedure. Finite element analysis was used to investigate the primary stability and strain distribution of various size stems and sleeves used in conjunction with a cementless revision tibial tray...
January 12, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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