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Simulation AND Orthop*

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https://www.readbyqxmd.com/read/29019803/the-spot-gradetm-a-new-method-for-reproducibly-quantifying-surgical-wound-bleeding
#1
William D Spotnitz, Dirk Zielske, Valerie Centis, Rachel Hoffman, Daniel L Gillen, Catherine Wittmann, Vincent Guyot, Doris M Campos, Patricia Forest, Alan Pearson, Paul C McAfee
STUDY DESIGN: Benchtop model with prospective surgeon video testing. OBJECTIVE: To create a surface bleeding severity scale, the SPOT GRADE (SG), for quantitative assessment of target bleeding site (TBS) blood loss. This is of particular interest for spinal surgery due to epidural bleeding and an inability to use diathermy and radiofrequency cautery close to nerve roots. SUMMARY OF BACKGROUND DATA: A novel apparatus perfusable at known flow rates and simulating different sized wounds was used to create movies to educate surgeons on specific degrees of bleeding...
October 10, 2017: Spine
https://www.readbyqxmd.com/read/28982066/modification-of-ti6al4v-surface-by-diazonium-compounds
#2
Mariusz Sandomierski, Tomasz Buchwald, Beata Strzemiecka, Adam Voelkel
Ti6Al4V alloy is the most commonly used in orthopedic industry as an endoprosthesis. Ti6Al4V exhibits good mechanical properties, except the abrasion resistance. Surface modification of Ti6Al4V in order to obtain organic layer, and then the attachment of the polymer, can allow for overcoming this problem. The aim of the work was the modification of Ti6Al4V surface by diazonium compounds: salt or cation generated in situ and examine the influence of the reducing agent - ascorbic acid, and the temperature of reaction on modification process...
September 28, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28976437/knee-arthroscopy-simulation-a-randomized-controlled-trial-evaluating-the-effectiveness-of-the-imperial-knee-arthroscopy-cognitive-task-analysis-ikacta-tool
#3
RANDOMIZED CONTROLLED TRIAL
Rahul Bhattacharyya, Donald J Davidson, Kapil Sugand, Matthew J Bartlett, Rajarshi Bhattacharya, Chinmay M Gupte
BACKGROUND: Virtual-reality and cadaveric simulations are expensive and not readily accessible. Innovative and accessible training adjuncts are required to help to meet training needs. Cognitive task analysis has been used extensively to train pilots and in other surgical specialties. However, the use of cognitive task analyses within orthopaedics is in its infancy. The purpose of this study was to evaluate the effectiveness of a novel cognitive task analysis tool to train novice surgeons in diagnostic knee arthroscopy in high-fidelity, phantom-limb simulation...
October 4, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28968476/effect-of-pedicle-fill-on-axial-pullout-strength-in-spinal-fixation-after-rod-reduction
#4
Kevin Albanese, Nathaniel R Ordway, Stephen A Albanese, William F Lavelle
Rod reduction to pedicle screws is used for a variety of spinal fixation procedures; however, it can alter the integrity of the screw-bone interface. The authors investigated the effect of pedicle fill (ratio of pedicle screw diameter to pedicle diameter) on the strength of the screw-bone interface after simulated rod reduction on 17 vertebrae (3 thoracolumbar spine specimens). Pedicle diameter was measured with standard clinical computed tomography scan protocols. The authors determined the minimum pedicle diameter for each level...
October 2, 2017: Orthopedics
https://www.readbyqxmd.com/read/28951659/macrodamage-accumulation-model-for-a-human-femur
#5
Farah Hamandi, Tarun Goswami
The objective of this study was to more fully understand the mechanical behavior of bone tissue that is important to find an alternative material to be used as an implant and to develop an accurate model to predict the fracture of the bone. Predicting and preventing bone failure is an important area in orthopaedics. In this paper, the macrodamage accumulation models in the bone tissue have been investigated. Phenomenological models for bone damage have been discussed in detail. In addition, 3D finite element model of the femur prepared from imaging data with both cortical and trabecular structures is delineated using MIMICS and ANSYS® and simulated as a composite structure...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28946646/impact-of-surface-potential-on-apatite-formation-in-ti-alloys-subjected-to-acid-and-heat-treatments
#6
Seiji Yamaguchi, Hideki Hashimoto, Ryusuke Nakai, Hiroaki Takadama
Titanium metal (Ti) and its alloys are widely used in orthopedic and dental fields. We have previously shown that acid and heat treatment was effective to introduce bone bonding, osteoconduction and osteoinduction on pure Ti. In the present study, acid and heat treatment with or without initial NaOH treatment was performed on typical Ti-based alloys used in orthopedic and dental fields. Dynamic movements of alloying elements were developed, which depended on the kind of treatment and type of alloy. It was found that the simple acid and heat treatment enriched/remained the alloying elements on Ti-6Al-4V, Ti-15Mo-5Zr-3Al and Ti-15Zr-4Nb-4Ta, resulting in neutral surface charges...
September 24, 2017: Materials
https://www.readbyqxmd.com/read/28937469/outcome-of-a-resident-spine-surgical-skills-training-program
#7
Brian P Calio, Christopher K Kepler, John D Koerner, Jeffrey A Rihn, Paul Millhouse, Kris E Radcliff
STUDY DESIGN: Cadaver training lab. OBJECTIVE: To determine if a technical cadaver skills training lab for spinal surgery increases resident confidence, satisfaction in training, and perception of operating room safety. SUMMARY OF BACKGROUND DATA: Resident training is an important topic in the setting of work hour reform. The use of supplemental materials such as videos, sawbones, and simulators may become important to adequately train orthopedic residents...
October 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28936362/albumin-protein-cleavage-affects-the-wear-and-friction-of-ultra-high-molecular-weight-polyethylene
#8
Yasha Dwivedi, Michel P Laurent, Shravan Sarvepalli, Thomas M Schmid, Markus A Wimmer
It is well established that the total protein concentration and albumin-to-globulin ratio influence the wear of ultra-high molecular polyethylene (UHMWPE, "polyethylene") in joint prostheses. A factor on wear not yet studied, but of possible clinical relevance, is protein cleavage. Such cleavage is expected in the presence of an inflammatory response and as a result of wear processes at the articular interface. The aim of this study was to compare the tribological behavior of polyethylene articulated against an orthopedic wrought CoCrMo alloy for three lubricants: cleaved albumin, uncleaved albumin, and newborn calf serum (control)...
September 2017: Lubricants
https://www.readbyqxmd.com/read/28921006/computer-aided-planning-of-orthopaedic-surgeries-the-definition-of-generic-planning-steps-for-bone-removal-procedures
#9
David Putzer, Jose Luis Moctezuma, Michael Nogler
PURPOSE: An increasing number of orthopaedic surgeons are using computer aided planning tools for bone removal applications. The aim of the study was to consolidate a set of generic functions to be used for a 3D computer assisted planning or simulation. METHODS: A limited subset of 30 surgical procedures was analyzed and verified in 243 surgical procedures of a surgical atlas. Fourteen generic functions to be used in 3D computer assisted planning and simulations were extracted...
September 18, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28882905/cost-comparison-of-orthopaedic-fracture-pathways-using-discrete-event-simulation-in-a-glasgow-hospital
#10
Gillian H Anderson, Paul J Jenkins, David A McDonald, Robert Van Der Meer, Alec Morton, Margaret Nugent, Lech A Rymaszewski
OBJECTIVE: Healthcare faces the continual challenge of improving outcome while aiming to reduce cost. The aim of this study was to determine the micro cost differences of the Glasgow non-operative trauma virtual pathway in comparison to a traditional pathway. DESIGN: Discrete event simulation was used to model and analyse cost and resource utilisation with an activity-based costing approach. Data for a full comparison before the process change was unavailable so we used a modelling approach, comparing a virtual fracture clinic (VFC) with a simulated traditional fracture clinic (TFC)...
September 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28882757/ion-channel-functional-protein-kinase-trpm7-regulates-mg-ions-to-promote-the-osteoinduction-of-human-osteoblast-via-pi3k-pathway-in-vitro-simulation-of-the-bone-repairing-effect-of-mg-based-alloy-implant
#11
Xiuzhi Zhang, Haiyue Zu, Dewei Zhao, Ke Yang, Simiao Tian, Xiaoming Yu, Faqiang Lu, Baoyi Liu, Xiaobing Yu, Benjie Wang, Wei Wang, Shibo Huang, Yongxuan Wang, Zihua Wang, Zhaodong Zhang
Mg-based alloys, as the potential orthopaedic implant, can self-degrade to avoid second operation for its remove, and enable to promote bone repair; however, the underlying molecular mechanisms remain unclear. In the present study, we examined the effect of Mg ions on osteogenesis, chemotaxis and anti-alkaline stress in hFOB1.19 human osteoblast cells to simulate bone-repairing effect of a biodegradable Mg-based alloy implant in vitro, and explored the regulatory role of the transient receptor potential melastatin 7 (TRPM7)/phosphoinositide 3-kinase (PI3K) signalling pathway in the process of Mg ion-induced bone repair by knockdown of TRPM7 and antagonizing PI3K activity...
September 4, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28882373/a-paradigm-shift-in-surgical-planning-and-simulation-using-3dgraphy-experience-of-first-50-surgeries-done-using-3d-printed-biomodels
#12
Vaibhav Bagaria, Kshitij Chaudhary
INTRODUCTION: Preoperative planning is an important aspect of any orthopedic surgery. Traditionally, surgeons mentally rehearse the operation and anticipate problems based on data available from "radiography" like MRI and CT. 3D printed bio-models and tools, or "3Dgraphy" can simplify this mental exercise and provide a realistic and user-friendly portrayal of this radiographic data. METHODS: Five surgeons participated in this multicenter study. 3D printed biomodels were obtained for 50 surgical cases that included periarticular trauma (24), pelvic trauma (11), complex primary (7), and revision arthroplasty (8)...
September 1, 2017: Injury
https://www.readbyqxmd.com/read/28879686/development-of-a-bioactive-porous-collagen-%C3%AE-tricalcium-phosphate-bone-graft-assisting-rapid-vascularization-for-bone-tissue-engineering-applications
#13
Nafiseh Baheiraei, Mohamma Reza Nourani, Sm Javad Mortazavi, Mansoureh Movahedin, Hossein Eyni, Fatemeh Baghery, Mohammad Hadi Norahan
We developed collagen (COL) and collagen/beta tricalcium phosphate (COL/β-TCP) scaffolds with a β-TCP/collagen weight ratio of 4 by freeze-drying. Mouse bone marrow-derived mesenchymal stem cells (BMMSCs) were cultured on these scaffolds for 14 days. Samples were characterized by physicochemical analyses and their biological properties such as cell viability and alkaline phosphatase (ALP) activity was,also, examined. Additionally, the vascularization potential of the prepared scaffolds was tested subcutaneously in Wistar rats...
September 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28876931/medium-range-structural-organization-of-phosphorus-bearing-borosilicate-glasses-revealed-by-advanced-solid-state-nmr-experiments-and-md-simulations-consequences-of-b-si-substitutions
#14
Yang Yu, Baltzar Stevensson, Mattias Edén
The short and intermediate range structures of a large series of bioactive borophosphosilicate (BPS) glasses were probed by solid-state nuclear magnetic resonance (NMR) spectroscopy and atomistic molecular dynamics (MD) simulations. Two BPS glass series were designed by gradually substituting SiO2 by B2O3 in the respective phosphosilicate base compositions 24.1Na2O-23.3CaO-48.6SiO2-4.0P2O5 ("S49") and 24.6Na2O-26.7CaO-46.1SiO2-2.6P2O5 ("S46"), the latter constituting the "45S5 Bioglass" utilized for bone grafting applications...
October 5, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28872539/moving-from-see-one-do-one-simulation-training-can-save-money-commentary-on-an-article-by-donald-s-bae-md-et-al-improved-safety-and-cost-savings-from-reductions-in-cast-saw-burns-after-simulation-based-education-for-orthopaedic-surgery-residents
#15
https://www.readbyqxmd.com/read/28872536/improved-safety-and-cost-savings-from-reductions-in-cast-saw-burns-after-simulation-based-education-for-orthopaedic-surgery-residents
#16
Donald S Bae, Hayley Lynch, Katherine Jamieson, C Winnie Yu-Moe, Christopher Roussin
BACKGROUND: The purpose of this investigation was to characterize the clinical efficacy and cost-effectiveness of simulation training aimed at reducing cast-saw injuries. METHODS: Third-year orthopaedic residents underwent simulation-based instruction on distal radial fracture reduction, casting, and cast removal using an oscillating saw. The analysis compared incidences of cast-saw injuries and associated costs before and after the implementation of the simulation curriculum...
September 6, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28867992/analysis-of-locking-self-taping-bone-screws-for-angularly-stable-plates
#17
Radek Čada, Karel Frydrýšek, František Sejda, Jiří Demel, Leopold Pleva
Paper focuses on biomechanics, specifically on locking cortical bone screws in angularly stable plates used for the treatment of bone fractures in the medical fields of traumatology and orthopaedics. During extraction of titanium-alloy implants, problems are encountered in an effort to loosen some locking bone screws from the locking holes of an angularly stable plate and the subsequent stripping of the internal hexagon of the screw head. The self-locking of the screw-plate threaded joint was verified by calculation and the effect of the angle of the thread on the head of the locking cortical bone screw on self-locking was evaluated...
2017: Journal of Medical and Biological Engineering
https://www.readbyqxmd.com/read/28866157/low-modulus-and-bioactive-ti-%C3%AE-tcp-ti-mesh-composite-prepared-by-spark-plasma-sintering
#18
Yu Guo, Yanni Tan, Yong Liu, Shifeng Liu, Rui Zhou, Hanchun Tang
A titanium mesh scaffold composite filled with Ti/α-TCP particles was prepared by spark plasma sintering (SPS). The microstructures and interfacial reactions of the composites were investigated by scanning electron microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) analyses. The compressive strength and elastic modulus were also measured. In vitro bioactivity and biocompatibility was evaluated by using simulated body fluid and cells culture, respectively. After high temperature sintering, Ti oxides, TixPy and CaTiO3 were formed...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28854492/effect-of-different-post-treatments-on-the-bioactivity-of-alkali-treated-ti-5si-alloy
#19
Hsueh-Chuan Hsu, Shih-Ching Wu, Shih-Kuang Hsu, Yi-Hang Liao, Wen-Fu Ho
BACKGROUND: As titanium (Ti) alloys are bioinert, various chemically-modified Ti surface has been developed to promote bioactivity and bone ingrowth. OBJECTIVE: In this study, various post treatments (water aging, hydrothermal, and heat treatments) were applied to NaOH-treated Ti-5Si to improve its bioactivity. METHODS: The bioactivity of surface-modified Ti-5Si was access by using the apatite formation ability of Ti-5Si surfaces soaking in a simulated body fluid (SBF)...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28843830/mechanical-model-of-orthopaedic-drilling-for-augmented-haptics-based-training
#20
REVIEW
Ashkan Pourkand, Naghmeh Zamani, David Grow
In this study, augmented-haptic feedback is used to combine a physical object with virtual elements in order to simulate anatomic variability in bone. This requires generating levels of force/torque consistent with clinical bone drilling, which exceed the capabilities of commercially available haptic devices. Accurate total force generation is facilitated by a predictive model of axial force during simulated orthopaedic drilling. This model is informed by kinematic data collected while drilling into synthetic bone samples using an instrumented linkage attached to the orthopaedic drill...
June 30, 2017: Computers in Biology and Medicine
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