keyword
MENU ▼
Read by QxMD icon Read
search

Simulation AND Orthop*

keyword
https://www.readbyqxmd.com/read/28332159/electromagnetically-tracked-personalized-templates-for-surgical-navigation
#1
Andrew W L Dickinson, Michelle L Zec, David R Pichora, Brian J Rasquinha, Randy E Ellis
PURPOSE: An electromagnetic (EM) surgical tracking system was developed for orthopedic navigation. The reportedly poor accuracy of point-based EM navigation was improved by using anatomical impressions, which were EM-tracked personalized templates. Lines, rather than points, were consistently used for calibration and error evaluation. METHODS: Technical accuracy was tested using models derived from CT scans of ten cadaver shoulders. Tracked impressions were first designed, calibrated, and tested using lines as fiducial objects...
March 22, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28326347/the-insufficiencies-of-risk-analysis-of-impending-pathological-fractures-in-patients-with-femoral-metastases-a-literature-review
#2
Emir Benca, Janina M Patsch, Winfried Mayr, Dieter H Pahr, Reinhard Windhager
PURPOSE: Pathologic fractures in patients with bone metastases are a common problem in clinical orthopaedic routine. On one hand recognition of metastatic lesions, which are at a high risk of fracture, is essential for timely prophylactic fixation, while on the other hand patients with a low risk of pathologic fractures should be spared from overtreatment. The purpose of this review is to identify all methods for fracture risk evaluation in patients with femoral metastases in the literature and to evaluate their predictive values in clinical applications...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28319734/novel-mechanical-impact-simulator-designed-to-generate-clinically-relevant-anterior-cruciate-ligament-ruptures
#3
Nathaniel A Bates, Nathan D Schilaty, Christopher V Nagelli, Aaron J Krych, Timothy E Hewett
BACKGROUND: Over 250,000 anterior cruciate ligament ruptures occur each year; therefore, it is important to understand the underlying mechanisms of these injuries. The objective of the current investigation was to develop and analyze an impact test device that consistently produces anterior cruciate ligament failure in a clinically relevant manner. METHOD: A mechanical impact simulator was developed to simulate the ground reaction force impulse generated from landing in a physiologic and clinically relevant manner...
March 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28315814/a-closer-look-at-the-in-vitro-electrochemical-characterisation-of-titanium-alloys-for-biomedical-applications-using-in-situ-methods
#4
J-L Wang, R L Liu, T Majumdar, S A Mantri, V A Ravi, R Banerjee, N Birbilis
Titanium (Ti) and its alloys are widely used in several biomedical applications, particularly as permanent orthopaedic implants. Electrochemical testing provides a means to perform accelerated corrosion testing, however whilst results from polarisation testing for Ti and its alloys to date have been generally useful, they are also rather limited on the basis of several reasons. One reason is that the polarisation curves for Ti and its alloys in simulated body fluids all appear rather similar, and they do not present a classical 'breakdown' or pitting potential, making discrimination between alloys difficult...
March 15, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28300369/perturbation-effects-of-the-carbon-fiber-peek-screws-on-radiotherapy-dose-distribution
#5
Alexander Nevelsky, Egor Borzov, Shahar Daniel, Raquel Bar-Deroma
Radiation therapy, in conjunction with surgical implant fixation, is a common combined treatment in cases of bone metastases. However, metal implants generally used in orthopedic implants perturb radiation dose distributions. Carbon-Fiber Reinforced Polyetheretherketone (CFR-PEEK) material has been recently introduced for production of intramedullary nails and plates. The purpose of this work was to investigate the perturbation effects of the new CFR-PEEK screws on radiotherapy dose distributions and to evaluate these effects in comparison with traditional titanium screws...
March 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295123/new-proximal-femoral-compaction-blade-provides-strong-antirotation-stability-of-the-femoral-head
#6
Shinya Hayashi, Yukiaki Hirata, Daiki Okamoto, Satoshi Kakunai, Shingo Hashimoto, Koji Takayama, Tomoyuki Matsumoto, Takahiro Niikura, Takaaki Fujishiro, Takafumi Hiranaka, Kotaro Nishida, Ryosuke Kuroda
This study investigated the mechanical properties of a new rectangular compaction blade and compared this blade with other types of nail. Three types of nail were tested: the Magnum lag screw (Robert Reid Inc, Tokyo, Japan), proximal femoral nail, and Magnum Fid blade (Robert Reid Inc). The nails were inserted into solid rigid polyurethane foam, and the torsional moments were loaded with an Instron testing machine (Instron, Kanagawa, Japan). The force curve was recorded, and the average maximum torque was calculated from this curve...
March 14, 2017: Orthopedics
https://www.readbyqxmd.com/read/28292485/a-cost-effectiveness-analysis-of-reverse-total-shoulder-arthroplasty-versus-hemiarthroplasty-for-the-management-of-complex-proximal-humeral-fractures-in-the-elderly
#7
Georg Osterhoff, Nathan N O'Hara, Jennifer D'Cruz, Sheila A Sprague, Nick Bansback, Nathan Evaniew, Gerard P Slobogean
BACKGROUND: There is ongoing debate regarding the optimal surgical treatment of complex proximal humeral fractures in elderly patients. OBJECTIVES: To evaluate the cost-effectiveness of reverse total shoulder arthroplasty (RTSA) compared with hemiarthroplasty (HA) in the management of complex proximal humeral fractures, using a cost-utility analysis. METHODS: On the basis of data from published literature, a cost-utility analysis was conducted using decision tree and Markov modeling...
March 2017: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/28285545/to-reduce-the-maximum-stress-and-the-stress-shielding-effect-around-a-dental-implant-bone-interface-using-radial-functionally-graded-biomaterials
#8
H Asgharzadeh Shirazi, M R Ayatollahi, A Asnafi
In a dental implant system, the value of stress and its distribution plays a pivotal role on the strength, durability and life of the implant-bone system. A typical implant consists of a Titanium core and a thin layer of biocompatible material such as the hydroxyapatite. This coating has a wide range of clinical applications in orthopedics and dentistry due to its biocompatibility and bioactivity characteristics. Low bonding strength and sudden variation of mechanical properties between the coating and the metallic layers are the main disadvantages of such common implants...
March 13, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28274193/a-peptide-based-biological-coating-for-enhanced-corrosion-resistance-of-titanium-alloy-biomaterials-in-chloride-containing-fluids
#9
Noah Muruve, Yuanchao Feng, Jaye Platnich, Daniel Hassett, Randall Irvin, Daniel Muruve, Frank Cheng
Titanium alloys are common materials in the manufacturing of dental and orthopedic implants. Although these materials exhibit excellent biocompatibility, corrosion in response to biological fluids can impact prosthesis performance and longevity. In this work, a PEGylated metal binding peptide (D-K122-4-PEG), derived from bacteria Pseudomonas aeruginosa, was applied on a titanium (Ti) alloy, and the corrosion resistance of the coated alloy specimen was investigated in simulated chloride-containing physiological fluids by electrochemical impedance spectroscopy and micro-electrochemical measurements, surface characterization, and biocompatibility testing...
March 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28258117/augmented-reality-in-bone-tumour-resection-an-experimental-study
#10
H S Cho, Y K Park, S Gupta, C Yoon, I Han, H-S Kim, H Choi, J Hong
OBJECTIVES: We evaluated the accuracy of augmented reality (AR)-based navigation assistance through simulation of bone tumours in a pig femur model. METHODS: We developed an AR-based navigation system for bone tumour resection, which could be used on a tablet PC. To simulate a bone tumour in the pig femur, a cortical window was made in the diaphysis and bone cement was inserted. A total of 133 pig femurs were used and tumour resection was simulated with AR-assisted resection (164 resection in 82 femurs, half by an orthropaedic oncology expert and half by an orthopaedic resident) and resection with the conventional method (82 resection in 41 femurs)...
March 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28244929/can-a-novel-low-cost-simulation-model-be-used-to-teach-anterior-cruciate-ligament-graft-preparation
#11
Christopher M Brusalis, John Todd R Lawrence, Sheena C Ranade, Joy C Kerr, Nicholas Pulos, Lawrence Wells, Theodore J Ganley
BACKGROUND: This study evaluated an anterior cruciate ligament (ACL) graft preparation simulation learning model for use by orthopaedic surgery trainees. METHODS: A simulation model for ACL graft preparation was constructed using shoelace as graft material and a wooden graft preparation board that matched the dimensions of existing products. A 12-minute instructional video targeted at novice learners was created to accompany the simulation model. A prospective randomized controlled trial was conducted on orthopaedic surgery residents divided into 2 groups with equal distributions of postgraduate year (PGY) status...
February 27, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28244920/evaluating-internal-fixation-skills-using-surgical-simulation
#12
Geoffrey T Burns, Brandon W King, James R Holmes, Todd A Irwin
BACKGROUND: Open reduction and internal fixation (ORIF) is an essential skill for an orthopaedic surgeon, yet teaching its components to surgical residents poses challenges in both complexity and cost. Surgical simulation has demonstrated efficacy and is now a mandated component of residency programs, but the techniques and resources required for effective simulation vary greatly. We hypothesized that simulation of ORIF skills could be accomplished in a cost-effective, quantifiable, and reproducible manner and that this experience coupled with didactic learning would increase skill proficiency and enhance ORIF performance...
March 1, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28224441/does-medicaid-insurance-confer-adequate-access-to-adult-orthopaedic-care-in-the-era-of-the-patient-protection-and-affordable-care-act
#13
Joseph T Labrum, Taylor Paziuk, Theresa C Rihn, Alan S Hilibrand, Alexander R Vaccaro, Mitchell G Maltenfort, Jeffrey A Rihn
BACKGROUND: A current appraisal of access to orthopaedic care for the adult patient receiving Medicaid is important, since Medicaid expansion was written into law by the Patient Protection and Affordable Care Act (PPACA). QUESTIONS/PURPOSES: (1) Do orthopaedic practices provide varying access to orthopaedic care for simulated patients with Medicaid insurance versus private insurance in a blinded survey? (2) What are the surveyed state-by-state Medicaid acceptance rates for adult orthopaedic practices in the current era of Medicaid expansion set forth by the PPACA? (3) Do surveyed rates of access to orthopaedic care in the adult patient population vary across practice setting (private vs academic) or vary with different Medicaid physician reimbursement rates? (4) Are there differences in the surveyed Medicaid acceptance rates for adult orthopaedic practices in states that have expanded Medicaid coverage versus states that have foregone expansion? METHODS: Simulated Patient Survey: We performed a telephone survey study of orthopaedic offices in four states with Medicaid expansion...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28222067/designation-and-validation-of-a-posterior-anatomical-plate-for-the-anterior-column-of-the-acetabulum
#14
Lifeng Zhang, Chuangxin Lin, Shenglu Cao, Yiran Wang, Geng Peng, Yongqiang Xu, Yongzeng Feng, Gang Wang
BACKGROUND Surgical treatment of acetabular fractures is one of the greatest challenges for orthopedic surgeons. Fixation of most displaced fractures requires extensive exposure, which may lead to complications, including blood loss, neural or vascular injury, postoperative infection, wound healing problems, and heterotopic bone formation. MATERIAL AND METHODS This study was conducted to certify an anatomic plate with an anterior column lag screw guiding device to repair the posterior acetabulum. Complete pelvic spiral computed tomography (CT) scan data were collected from 56 patients...
February 21, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28203578/supersized-atheroma-causing-acquired-coarctation-of-aorta-leading-to-heart-failure
#15
Sajin Karakattu, Ghulam Murtaza, Sharma Dinesh, Kamesh Sivagnanam, Jeffrey Schoondyke, Timir Paul
Calcified atheromatous aortic lesion causing significant narrowing of the aorta is an uncommon clinical entity. This calcified atheroma leads to obstruction of the lumen of the aorta simulating acquired coarctation of aorta causing impaired perfusion of lower limbs, visceral ischemia, and hypertension. We report a case of 58-year-old patient who presented with dyspnea on exertion, orthopnea, paroxysmal nocturnal dyspnea, 25-lb weight gain, lower extremity edema, and chest pain. Extensive workup including computed tomography and magnetic resonance imaging revealed a large calcific mass in the aortic arch causing his presenting symptoms...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28188484/estimation-of-attachment-regions-of-hip-muscles-in-ct-image-using-muscle-attachment-probabilistic-atlas-constructed-from-measurements-in-eight-cadavers
#16
Norio Fukuda, Yoshito Otake, Masaki Takao, Futoshi Yokota, Takeshi Ogawa, Keisuke Uemura, Ryota Nakaya, Kazunori Tamura, Robert B Grupp, Amirhossein Farvardin, Mehran Armand, Nobuhiko Sugano, Yoshinobu Sato
PURPOSE: Patient-specific musculoskeletal biomechanical simulation is useful in preoperative surgical planning and postoperative assessment in orthopedic surgery and rehabilitation medicine. A difficulty in application of the patient-specific musculoskeletal modeling comes from the fact that the muscle attachment regions are typically invisible in CT and MRI. Our purpose is to develop a method for estimating patient-specific muscle attachment regions from 3D medical images and to validate with cadaver experiments...
February 10, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28188003/current-status-of-simulation-based-training-tools-in-orthopedic-surgery-a-systematic-review
#17
Michael Morgan, Abdullatif Aydin, Alan Salih, Shibby Robati, Kamran Ahmed
OBJECTIVE: To conduct a systematic review of orthopedic training and assessment simulators with reference to their level of evidence (LoE) and level of recommendation. DESIGN: Medline and EMBASE library databases were searched for English language articles published between 1980 and 2016, describing orthopedic simulators or validation studies of these models. All studies were assessed for LoE, and each model was subsequently awarded a level of recommendation using a modified Oxford Centre for Evidence-Based Medicine classification, adapted for education...
February 7, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28178636/comparison-of-three-corrosion-inhibitors-in-simulated-partial-lead-service-line-replacements
#18
Aki Kogo, Sarah Jane Payne, Robert C Andrews
Partial lead service line replacements (PLSLR) were simulated using five recirculating pipe loops treated with either zinc orthophosphate (1mg/L as P), orthophosphate (1mg/L as P) or sodium silicate (10mg/L). Two pipe loops served as ⿿inhibitor-free⿿ (Pb-Cu) and ⿿galvanic free⿿ (Pb-PVC) controls. Changes in water quality (CSMR [0.2 or 1], conductivity [⿿330mS/cm or ⿿560mS/cm], chlorine [1.4mg/L]) were not observed to provide a significant impact on lead or copper release, although galvanic corrosion was shown to be a driving factor...
May 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28157719/preclinical-safety-and-efficacy-evaluation-of-biocas-bioactive-calcium-sulfate-bone-cement
#19
Sony Sandhya, Parayanthala Valappil Mohanan, Arumugan Sabareeswaran, Hari Krishna Varma, Manoj Komath
A new bioactive calcium sulfate-based formulation (named 'BioCaS') has been developed for bone filler applications. This is a self-setting injectable cement where the preset form comprises bassanite obtained from the uniform submicron-sized precursor crystals of gypsum, modified with hydrogen orthophosphate ions. The results of the safety and efficacy evaluation of BioCaS cement, done as per the International Standards and guidelines, are presented in this paper. The study plan consisted of in vitro screening tests of cytotoxicity and haemolysis and in vivo biocompatibility evaluation, including an acute systemic toxicity test (in mice), an intracutaneous reactivity test (in rabbits), a pyrogen test (in rabbits) and a maximization sensitization test (in guinea pigs)...
February 3, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28153385/video-review-as-a-tool-to-improve-orthopedic-residents-performance-of-closed-manipulative-reductions
#20
Nickul S Jain, Ran Schwarzkopf, John A Scolaro
OBJECTIVE: Orthopedic residents commonly perform closed manipulative reductions as a part of their training. Traditionally, this skill is taught early in training but difficult to simulate. Proficiency is achieved through repetition and experience; faculty observation and instruction is unfortunately often limited. Direct resident teaching has been shown to increase competency, comfort, and long-term skill retention. We hypothesize that video review of closed fracture reductions will provide an inexpensive and valuable tool for resident education and improve skill performance...
January 30, 2017: Journal of Surgical Education
keyword
keyword
70353
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"