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https://www.readbyqxmd.com/read/29227154/pose-determination-of-a-blade-implant-in-three-dimensions-from-a-single-two-dimensional-radiograph
#1
Toti Paolo, Barone Antonio, Marconcini Simone, Menchini-Fabris Giovanni Battista, Martuscelli Ranieri, Covani Ugo
OBJECTIVES: The aim of the study was to introduce a mathematical method to estimate the correct pose of a blade by evaluating the radiographic features obtained from a single two-dimensional image. METHODS: Blade-form implant bed preparation was performed using the piezosurgery device, and placement was attained with the use of magnetic mallet. The pose determination of the blade was described by means of three consecutive rotations defined by three angles of orientation (triplet φ, θ and Ψ)...
December 11, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29227146/time-dependent-recovery-of-human-synovial-membrane-mesenchymal-stem-cell-function-after-high-dose-steroid-therapy-case-report-and-laboratory-study
#2
Yukihiko Yasui, David A Hart, Norihiko Sugita, Ryota Chijimatsu, Kota Koizumi, Wataru Ando, Yu Moriguchi, Kazunori Shimomura, Akira Myoui, Hideki Yoshikawa, Norimasa Nakamura
BACKGROUND: The use of mesenchymal stem cells from various tissue sources to repair injured tissues has been explored over the past decade in large preclinical models and is now moving into the clinic. PURPOSE: To report the case of a patient who exhibited compromised mesenchymal stem cell (MSC) function shortly after use of high-dose steroid to treat Bell's palsy, who recovered 7 weeks after therapy. STUDY DESIGN: Case report and controlled laboratory study...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29226506/optimizing-hemodynamics-of-transcatheter-aortic-valve-in-valve-implantation-in-19-mm-surgical-aortic-prostheses
#3
Jayendrakumar S Patel, Amar Krishnaswamy, Jonathon White, Stephanie Mick, Jose Navia, Anand Mehta, Faisal Bakaeen, Zoran Popovic, Lars Svensson, Samir R Kapadia
OBJECTIVE: To demonstrate the feasibility of achieving good hemodynamic results with valve-in-valve transcatheter aortic valve replacement (ViV TAVR) for degenerated 19 mm surgical bioprosthetic valves. BACKGROUND: Considerable controversy exists regarding ViV TAVR within 19mm surgical prostheses due to concerns of elevated valve gradients and mortality. METHODS: Among all patient undergoing ViV TAVR between 7/2016 and 4/2017 for symptomatic severe bioprosthetic aortic stenosis (AS), five had a 19 mm surgical valve in place and were included in this publication...
December 11, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29225424/parametric-analysis-of-electromechanical-and-fatigue-performance-of-total-knee-replacement-bearing-with-embedded-piezoelectric-transducers
#4
Mohsen Safaei, R Michael Meneghini, Steven R Anton
Total knee arthroplasty (TKA) is a common procedure in the United States; it has been estimated that about 4 million people are currently living with primary knee replacement in this country. Despite huge improvements in material properties, implant design, and surgical techniques, some implants fail a few years after surgery. A lack of information about in vivo kinetics of the knee prevents the establishment of a correlated intra- and postoperative loading pattern in knee implants. In this study, a conceptual design of an ultra high molecular weight (UHMW) knee bearing with embedded piezoelectric transducers is proposed, which is able to measure the reaction forces from knee motion as well as harvest energy to power embedded electronics...
September 2017: Smart Materials & Structures
https://www.readbyqxmd.com/read/29224946/revision-arthroplasty-of-the-wrist-in-patients-with-rheumatoid-arthritis-mean-follow-up-6-6-years
#5
Per Fischer, Marcus Sagerfors, Ole Brus, Kurt Pettersson
PURPOSE: Management of failed total wrist arthroplasty (TWA) can be challenging; surgical treatment options include salvage arthrodesis, revision arthroplasty, and resection arthroplasty. There are few studies regarding salvage arthrodesis, and revision arthroplasty has been infrequently investigated. The aim of the study was to report the outcome after revision arthroplasty of the wrist. METHODS: A retrospective cohort of 16 revision TWAs was evaluated between 2003 and 2016...
December 7, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29223353/late-open-surgical-conversion-after-endovascular-abdominal-aortic-aneurysm-repair
#6
Vinay Kansal, Sudhir Nagpal, Prasad Jetty
INTRODUCTION: Late open surgical conversion following endovascular aneurysm repair (EVAR) may occur more frequently after performing EVAR in anatomy outside the instructions for use (IFU). This study reviews predictors and outcomes of late open surgical conversion for failed EVAR. METHODS: This retrospective cohort study reviewed all EVARs performed at the Ottawa Hospital between January 1999 and May 2015. Open surgical conversions >1 month post EVAR were identified...
December 6, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29222607/static-and-fatigue-strength-of-a-novel-anatomically-contoured-implant-compared-to-five-current-open-wedge-high-tibial-osteotomy-plates
#7
Arnaud Diffo Kaze, Stefan Maas, James Belsey, Alexander Hoffmann, Dietrich Pape
BACKGROUND: The purpose of the present study was to compare the mechanical static and fatigue strength of the size 2 osteotomy plate "Activmotion" with the following five other common implants for the treatment of medial knee joint osteoarthritis: the TomoFix small stature, the TomoFix standard, the Contour Lock, the iBalance and the second generation PEEKPower. METHODS: Six fourth-generation tibial bone composites underwent a medial open-wedge high tibial osteotomy (HTO), according to standard techniques, using size 2 Activmotion osteotomy plates...
December 8, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29221479/in-screw-polymethylmethacrylate-augmented-sacroiliac-screw-for-the-treatment-of-fragility-fractures-of-the-pelvis-a-prospective-observational-study-with-1-year-follow-up
#8
Andreas Höch, Philipp Pieroh, Ralf Henkelmann, Christoph Josten, Jörg Böhme
BACKGROUND: The incidence of pelvic ring fractures in the elderly significantly increased. Because of persistent pain and immobilization associated with this injury, surgical treatment is recommended. To minimise comorbidities and surgical risk, percutaneous techniques are becoming more relevant. In-screw cement augmentation of sacroiliac screw fixation is a promising procedure; however, clinical follow-up data remain scarce. This study investigated the safety and possible complications of the procedure along with a 1-year follow-up...
December 8, 2017: BMC Surgery
https://www.readbyqxmd.com/read/29220087/dual-energy-based-metal-segmentation-for-metal-artifact-reduction-in-dental-computed-tomography
#9
Mohamed A A Hegazy, Mohamed Elsayed Eldib, Daniel Hernandez, Myung Hye Cho, Min Hyoung Cho, Soo Yeol Lee
PURPOSE: In a dental CT scan, the presence of dental fillings or dental implants generates severe metal artifacts that often compromise readability of the CT images. Many metal artifact reduction (MAR) techniques have been introduced, but dental CT scans still suffer from severe metal artifacts particularly when multiple dental fillings or implants exist around the region of interest. The high attenuation coefficient of teeth often causes erroneous metal segmentation, compromising the MAR performance...
December 8, 2017: Medical Physics
https://www.readbyqxmd.com/read/29218649/treatment-of-flexor-tendon-reconstruction-failures-multicentric-experience-with-brunelli-active-tendon-implant
#10
A Poggetti, M Novi, M Rosati, D Ciclamini, M Scaglione, B Battiston
INTRODUCTION: Secondary repair of flexor tendon injuries remain a challenging procedure for hand surgeons. Usually, secondary reconstruction should be performed by staged approach. When the tendon and pulley integrity are intact, tenolysis may be the first surgical option. One-/two-stage tendon grafts are suggested when the integrity of flexor tendon is compromised. Active tendon implants (Brunelli prostheses) may represent an efficient option in patients with a poor prognosis, as well as whenever classical techniques fail...
December 7, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29210186/a-retrospective-study-on-clinical-and-radiological-outcomes-of-oral-implants-in-patients-followed-up-for-a-minimum-of-20-years
#11
Bruno Ramos Chrcanovic, Jenö Kisch, Tomas Albrektsson, Ann Wennerberg
BACKGROUND: Very long-term follow-up of oral implants is seldom reported in the literature. PURPOSE: To assess oral implant failure rates and marginal bone loss (MBL) of patients followed up for a minimum of 20 years. MATERIALS AND METHODS: Implants placed in patients followed up for 20+ years were included. Descriptive statistics, survival analyses, generalized estimating equations were performed. Three-hundred implants were randomly selected for MBL...
December 6, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29206315/intrathecal-trialing-of-continuous-infusion-combination-therapy-with-hydromorphone-and-bupivacaine-in-failed-back-surgery-patients
#12
Ryan J Galica, Salim M Hayek, Elias Veizi, Matthew T McEwan, Sivakanth Katta, Omar Ali, Nida Aziz, Nidhi Sondhi
OBJECTIVES: Intrathecal (IT) trial is a prognostic interventional pain management procedure employed to determine the potential success of treating intractable pain with an implantable infusion device system. There is a dearth of data regarding trials with continuous infusion of combination therapy (e.g. opioid combined with local anesthetic). The objective of the this study was to determine the overall outcomes of continuous infusion IT trials and factors influencing long-term success of IT therapy in patients with chronic intractable pain post-laminectomy...
December 5, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29204491/a-simple-technique-to-remove-well-fixed-acetabular-components-in-revision-of-total-hip-arthroplasty
#13
Xiaoqi Zhang, Fei Hu, Rui He, Xu Li, Xiaofeng Ji, Xifu Shang
Removing well-fixed acetabular components can be a challenge for orthopaedic surgeons in revision of total hip arthroplasty. Acetabular bone loss, fracture, and other complications occurred in extracting implants may result in instability and fail of revision. Thus, instruments are developed to avoid such complications. We report a simple technique by drilling a tunnel on the superolateral quadrant of acetabulum and using an offset staff to remove acetabular components without many matching units. The procedure of removing well-fixed acetabular components is a simple, efficient, inexpensive, bone stock preserving technique...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29204486/fracture-of-the-femoral-adapter-bolt-and-taper-adapter-in-a-modern-rotating-platform-knee-arthroplasty
#14
Elexis C Baral, Alexander S McLawhorn, Timothy M Wright, Edwin P Su
A 58-year-old woman presented with onset of pain associated with a popping sound after a twisting motion 4 years after left total knee revision arthroplasty. She had a complex medical history, including a reported bone cement allergy, and presented to the hospital unable to bear weight. Plain radiographs revealed a broken femoral component, with the femoral metaphyseal sleeve separated from the distal articular component. During surgery, it was observed that the femoral adapter bolt and taper adapter had both fractured...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29203079/residual-pressure-gradient-across-the-implanted-stent-an-important-factor-of-post-pci-physiological-results
#15
Yoshiaki Kawase, Masanori Kawasaki, Jun Kikuchi, Tetsuo Hirata, Syuuichi Okamoto, Toru Tanigaki, Hiroyuki Omori, Hideaki Ota, Munenori Okubo, Hiroki Kamiya, Akihiro Hirakawa, Hitoshi Matsuo
BACKGROUND: Instantaneous wave-free ratio (iFR) has the potential to improve the accuracy of the prediction of the physiological result of percutaneous coronary intervention (PCI). The aim of this study was to evaluate the accuracy of iFR to predict the final physiological results following PCI, and investigate the factors for failed prediction. METHODS: In 73 lesions, iFR pullback recordings were measured and comparisons were made between the predicted improvement following PCI and the observed result...
December 1, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/29201974/the-risk-factors-in-early-failure-of-dental-implants-a-retrospective-study
#16
Hassan Mohajerani, Roozbeh Roozbayani, Shahram Taherian, Reza Tabrizi
Statement of the Problem: Despite the low failure rate of dental implants, recognition of the risk factors can enhance the predictability of failure. Purpose: The aim of this study was to evaluate the risk factors for early implant failure. Materials and Method: This retrospective cohort study was conducted on two groups of patients, the patients with a failed implant before loading and those without a failed implant. Age, gender, implant type, implant surface, implant length, bone type, type of surgery (one- or two-stage) and immediate (fresh socket) or delayed placement of implant were the variables to be assessed in this study...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29201518/transobturator-four-arms-mesh-in-the-surgical-management-of-stress-urinary-incontinence-with-cystocele
#17
Hammouda Sherif, Tarek Soliman Othman, Amr Eldkhakhany, Hussein Elkady, Adel Elfallah
Objective: This study aims to evaluate safety and efficacy of four arms polypropylene mesh in the long- term follow-up in the management of stress urinary incontinence (SUI) associated with cystocele. Material and methods: This prospective study was conducted on 50 female patients with SUI associated with cystocele. Patients underwent placement of transobturator four-arms mesh implants. Stress incontinence was evaluated using cough stress test with and without prolapse reduction, Stamey's grading of SUI, the validated Arabic version of the International Consultation on Incontinence Questionnaire-Short Form and King Health Questionnaire forms...
December 2017: Turkish Journal of Urology
https://www.readbyqxmd.com/read/29199387/early-marginal-bone-stability-of-dental-implants-placed-in-a-transalveolarly-augmented-maxillary-sinus-a-controlled-retrospective-study-of-surface-modification-with-calcium-ions
#18
Eduardo Anitua, Laura Piñas, Mohammad Hamdan Alkhraisat
BACKGROUND: Recently, components of the extracellular cellular matrix have been assessed to enhance the biological response to dental implants. This study aims to assess the effect of surface modification with calcium ions on the early marginal bone loss of dental implants placed in a transalveolarly augmented maxillary sinus. METHODS: A retrospective study of transalveolar sinus floor augmentation was conducted in a single private dental clinic. The predictor variable was the surface of the dental implant...
December 4, 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29198417/the-significance-of-spinal-fixation-in-palliative-surgery-for-spinal-metastases
#19
Shurei Sugita, Takahiro Hozumi, Kiyofumi Yamakawa, Takahiro Goto
The purpose of this study is to assess appropriate fixation methods for surgical spinal stabilization for spinal metastases. 191 patients who underwent spine surgery for spinal metastases are included in this study. The surgeries included 1) posterior decompression only (29), 2) posterior decompression and fixation (153), and 3) decompression and circumferential fixation (9). We evaluated and compared all cases based upon 1) use of fixation, 2) number of levels included in the fixation, 3) type of fixation, 4) use of bone graft, 5) presence of preoperative collapse of involved vertebrae, and 6) involved area of vertebrae according to Kostuik classification...
November 29, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29197657/feasibility-of-extravascular-pacing-with-a-novel-substernal-electrode-configuration-the-substernal-pacing-acute-clinical-evaluation-space-study-the-substernal-pacing-acute-clinical-evaluation-study
#20
Darius P Sholevar, Stanley Tung, Vikas Kuriachan, Peter Leong-Sit, Henri Roukoz, Gregory Engel, Steven P Kutalek, Devender Akula, Amy E Thompson, Melissa G T Christie, Marina Ostanniy, Franck Molin
BACKGROUND: Subcutaneous ICDs provide an alternative to transvenous defibrillation but require higher shock outputs and offer no anti-tachycardia pacing. The SPACE study evaluated the feasibility of pacing from an extravascular substernal location. OBJECTIVE: The primary purpose of the SPACE study was to characterize pacing from the substernal space. Secondary objectives included evaluating extracardiac stimulation and recording electrograms. METHODS: The SPACE study prospectively evaluated the feasibility of pacing with a commercially available EP catheter (Medtronic Marinr®, 7 Fr) acutely implanted in the substernal space via minimally invasive subxiphoid access...
November 29, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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