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Journal articles on the topic 'Beam fixation system'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Mehmani, Ilham Gasanaga, Vusala Rasim Mehmani, and Mammad Suad Afrail Aliyev. "COMPARATIVE ANALYSIS OF BALL AND BEAM FIXATION SYSTEMS." Annali d'Italia 49 (November 28, 2023): 80–81. https://doi.org/10.5281/zenodo.10214443.

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We have studied the effect of mechanical load and friction on the wear of the male and matrix of ball and beam fixation systems during their mechanical separation. A high level of fixation of cover removable dentures was revealed for 2 years, further maintenance of which can be ensured by replacing matrices. The analysis shows that the beam system significantly outperforms the ball system, due to the minimum loss of linear dimensions and does not require the restoration of the actual patric element. 

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Mammadova, S., T. Aliyev, and H. Zeynalov. "USE OF A BEAM FIXATION SYSTEM IN THE MANUFACTURE OF PARTIALLY REMOVABLE DENTURES." Scientific heritage, no. 132 (March 8, 2024): 24–25. https://doi.org/10.5281/zenodo.10795939.

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Treatment of patients with secondary partial adentia is still relevant today, since the prevalence of this pathology remains high. The need for orthopedic treatment with removable dentures, according to various authors, ranges from 30 to 60%. However, not all patients use removable dentures made for them. The reasons may be: a poorly made prosthesis, a problem with fixation, the psychological mood of the patient, and more.

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Resnick, Daniel K., and Edward C. Benzel. "C1–C2 Pedicle Screw Fixation with Rigid Cantilever Beam Construct: Case Report and Technical Note." Neurosurgery 50, no. 2 (2002): 426–28. http://dx.doi.org/10.1097/00006123-200202000-00039.

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ABSTRACT OBJECTIVE AND IMPORTANCE Transarticular screw fixation of the C1–C2 complex provides immediate rigid fixation of the unstable spine. The technique is not feasible in a certain proportion of patients because of the position of the vertebral artery or the patient's body habitus. CLINICAL PRESENTATION The authors describe a rigid screw technique for the surgical treatment of a woman who was excluded as a candidate for C1–C2 transarticular screw fixation. TECHNIQUE C1–C2 pedicle screw fixation was achieved using a fixed moment arm cantilever beam system. This system provided immediate rig

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Gembalczyk, Grzegorz, Paweł Domogała, and Kamil Leśniowski. "Modeling of Underactuated Ball and Beam System—A Comparative Study." Actuators 12, no. 2 (2023): 59. http://dx.doi.org/10.3390/act12020059.

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The article presents a comparison of the methods of modeling the underactuated ball and beam system. This study was carried out to select a model suitable for the development of a control system using the model-based design methodology. Firstly, the approach commonly used in research was verified. It was also examined whether it is important to take into account the eccentric fixation in these models. An original model taking into account friction resistance was also proposed. The considered models were simulated in Matlab/Simulink software environments and verified in reality. The obtained re

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Jafarov, Afgan, Fatma Kübra Erbay Elibol, Chingiz Alizadeh, Mahir Gülşen, Emre Toğrul, and Teyfik Demir. "Perforated H-beam implant can be used in femoral neck fracture." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 233, no. 3 (2019): 354–61. http://dx.doi.org/10.1177/0954411919827041.

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This biomechanical study evaluated comparison osteosynthesis of the femoral neck fracture model by 3 cannulated screw implants and new perforated H beam implants under different loading conditions with 45 third generation right proximal femur bones. A standardized Pauwels Type 3 of the femoral neck fracture was performed in the femur models. For assessing the rigidity and strength of fixation methods, the proximal femur bones after their osteosynthesis were then mechanically tested in axial compression, and torsional and dynamic axial compression loading. To determine the structural advantage

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Khramov, Alexander, Ilya Semdyankin, and Eugene Kiselev. "Application of the Modern Stationary Workholding Systems for Increase Capacity and Quality of Non-Rigid Aircraft Parts." MATEC Web of Conferences 346 (2021): 03076. http://dx.doi.org/10.1051/matecconf/202134603076.

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Review of results experimental, production tests and features of machining forging workpiece of part type «chassis beam» from aluminum alloy V93pchT3 with significant deformations during milling process on SCHUNK VERO-S AVIATION system. Increase of production capacity on 2.9 times and significant better quality, geometrical properties if compare with conventional fixation by clamps.

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Carminucci, Arthur, Ke Nie, Joseph Weiner, Eric Hargreaves, and Shabbar F. Danish. "Assessment of motion error for frame-based and noninvasive mask-based fixation using the Leksell Gamma Knife Icon radiosurgery system." Journal of Neurosurgery 129, Suppl1 (2018): 133–39. http://dx.doi.org/10.3171/2018.7.gks181516.

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OBJECTIVEThe Leksell Gamma Knife Icon (GK Icon) radiosurgery system can utilize cone-beam computed tomography (CBCT) to evaluate motion error. This study compares the accuracy of frame-based and frameless mask-based fixation using the Icon system.METHODSA retrospective cohort study was conducted to evaluate patients who had undergone radiosurgery with the GK Icon system between June and December 2017. Patients were immobilized in either a stereotactic head frame or a noninvasive thermoplastic mask with stereotactic infrared (IR) camera monitoring. Setup error was defined as displacement of the

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Poudrel, Anne-Sophie, Giuseppe Rosi, Vu-Hieu Nguyen, and Guillaume Haiat. "Vibro-acoustic characterization of the bone-implant system during insertion." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A53. http://dx.doi.org/10.1121/10.0018136.

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The femoral stem primary stability achieved by the impaction of a beam called “ancillary” attached to the implant during its insertion is an important factor of success in cementless surgery. However, surgeons rely on their proprioception, making the process subjective. The use of experimental modal analysis (EMA) without sensor nor probe fixation on the implant or on the bone is a promising non-destructive approach to determine implant stability. This study investigates whether EMA performed directly on a beam, which is temporary fixed to the implant during its insertion, could provide inform

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Ali, Ahmad M., M. Burton, M. Hashmi, and M. Saleh. "Outcome of complex fractures of the tibial plateau treated with a beam-loading ring fixation system." Journal of Bone and Joint Surgery. British volume 85-B, no. 5 (2003): 691–99. http://dx.doi.org/10.1302/0301-620x.85b5.13855.

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Shtanko, Р., S. Ryagin, І. Geletiy, and А. Kononenko. "Design of a beam of variable cross-section on the elastic base by the quasi-analytical method considering boundary conditions." Innovative Materials and Technologies in Metallurgy and Mechanical Engineering, no. 1 (September 14, 2021): 73–76. http://dx.doi.org/10.15588/1607-6885-2021-2-12.

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Purpose. Improvement of the quasi-analytical method of nonlinear differential equation solution and its approbation with reference to beams of variable cross-section on the elastic base with two base factors. Research methods. Boundary conditions in the form of required number of correspondently transformed equations are added to the system of the linear algebraic equations which results from substitution of approximating function with constant factors (for example – power function) in the nonlinear differential equation and fixation of a set of variable values. The total number of the e

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Larson, David, Christopher Reb, Christopher Hyer, Patrick Bull, and Jeffrey Weber. "Structures at Risk with Plantar Approach Retrograde First Metatarsal Charcot Beam Screw Insertion." Foot & Ankle Orthopaedics 2, no. 3 (2017): 2473011417S0002. http://dx.doi.org/10.1177/2473011417s000251.

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Category: Diabetes, Midfoot/Forefoot Introduction/Purpose: The plantar approach for medial column retrograde intramedullary fixation of Charcot midfoot deformity allows for easy access to the ideal starting point on the metatarsal head and is supported by good clinical outcomes data. The primary argument against this approach is iatrogenic damage to the plantar structures of the metatarsophalangeal joint (MTP), which could cause tendon imbalances resulting in hallux malleus deformity. However, thus far, such complications have rarely been reported. Based on available literature, it is unclear

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Burkhardt, T., M. Mohaupt, M. Hornaff, et al. "Packaging Technology of Multi Deflection Arrays for Multi-Shaped Beam Lithography." International Symposium on Microelectronics 2011, no. 1 (2011): 000600–000607. http://dx.doi.org/10.4071/isom-2011-wa5-paper1.

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Multi-Shaped electron beam lithography is considered a promising approach for high throughput mask and direct writing. Providing multiple apertures and individually controlled electrodes it allows for massive parallelization of exposure shots, thus significantly decreasing write time. A silicon-based micro-structured MEMS multi-beam deflection array (MDA) featuring 8×8 apertures is presented. The hybrid integration of MDA devices in ceramic system carriers utilizing a laser-based Solderjet Bumping process is demonstrated. This flux-free soldering process provides adhesive-free, long term stabl

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Safarov, Mahir Alisa. "Comparative characteristics of the quality of prosthetics of the edentulous lower jaw with removable dentures based on the bol-abutments and on a beam system." SUCHASNA STOMATOLOHIYA 112, no. 5-6 (2022): 36. http://dx.doi.org/10.33295/1992-576x-2022-5-6-36.

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Resume. The article presents the results of a long-term examination of prosthetics in 100 patients aged 55 to 73 years with a complete absence of teeth in the lower jaw, of which 62 were made removable dentures based on intraosseous implants with installed bol-abutments, and 38 patients were made removable dentures with based on intraosseous implants with an installed beam structure. A significant superiority of prosthetics based on a beam structure, was revealed in terms of quality of life, fixation of prostheses, as well as functional efficiency. At the same time, when using implants with in

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Miao, Feng, Guan Ping, and Wang Bo. "Vertical Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction." Advanced Materials Research 243-249 (May 2011): 1798–802. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1798.

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Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. Under vertical excitation, the seismic response analysis result considering that pile-soil-structure interaction was c

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Cross, Alan R., Dennis N. Aron, Steven C. Budsberg, Timothy L. Foutz, Brent T. Pearman, and Mark D. Evans. "Validation of a finite element model of the Kirschner-Ehmer external skeletal fixation system." American Journal of Veterinary Research 60, no. 5 (1999): 615–20. http://dx.doi.org/10.2460/ajvr.1999.60.05.615.

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Abstract Objective To determine the validity of finite element analysis (FEA) as a means of examining biomechanical properties of the Kirschner-Ehmer external skeletal fixation system. Sample Population 10 paired tibiae harvested from skeletally mature dogs weighing between 30 and 38 kg immediately following euthanasia for reasons unrelated to musculoskeletal disease. Procedure A gap fracture was created in each bone; fragments were stabilized with 3 frame configurations (type I, type II, and type III), using enhanced-profile threaded pins. Each bone-frame construct was tested, using a materia

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Qin, De-An, Jie-Fu Song, Li-Ping Song, and Gui-Sheng Feng. "Integrated approach to pain management for a patient with multiple bone metastases of uterine cervical cancer." Journal of International Medical Research 46, no. 5 (2018): 2023–30. http://dx.doi.org/10.1177/0300060518763709.

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Background Pain management for multiple bone metastases is complex and often requires multidisciplinary treatment. We herein describe patient-centered multidisciplinary pain management for metastatic cancer. Case presentation: A 61-year-old woman with multiple bone metastases of uterine cervical cancer developed intractable low back pain. After external beam radiotherapy failed, we performed lumbar spinal intralesional curettage, pedicle screw fixation, and nerve decompression. However, the neuralgia persisted. We then percutaneously injected epirubicin into the intervertebral foramina under c

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Mills, Donald L. "Guideway design and construction for Vancouver Advanced Light Rapid Transit." Canadian Journal of Civil Engineering 14, no. 3 (1987): 347–62. http://dx.doi.org/10.1139/l87-055.

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The Vancouver Advanced Light Rapid Transit (ALRT) System consists of 21.4 km (13.3 miles) of grade-separated guideway between the cities of Vancouver and New Westminster. Of the total length, 16.6 km (10.3 miles) are elevated, 1.3 km (0.8 miles) are in tunnel, and 3.5 km (2.2 miles) are at grade. There are 15 stations and a maintenance and vehicle storage facility. The system uses linear induction motor driven, light-weight driverless cars which are automatically controlled from the operations center located in the maintenance facility.The guideway beam concept was developed in concrete with t

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Régis, Jean, Louise Merly, Anne Balossier, et al. "Mask-Based versus Frame-Based Gamma Knife ICON Radiosurgery in Brain Metastases: A Prospective Randomized Trial." Stereotactic and Functional Neurosurgery 100, no. 2 (2021): 86–94. http://dx.doi.org/10.1159/000519280.

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<b><i>Background:</i></b> Radiosurgery is performed with a diversity of instruments relying usually either on a stereotactic frame or a mask for patient head fixation. Comfort and safety efficacy of the 2 systems have never been rigorously evaluated and compared. <b><i>Material and Method:</i></b> Between February 2016 and January 2017, 58 patients presenting with nonsmall cell lung cancer brain metastases have been treated by Gamma Knife radiosurgery (GKS) with random use of a frame or a mask for fixation were included patients older than 18, wi

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Feng, Miao, Guan Ping, and Wang Bo. "Horizontal Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction." Applied Mechanics and Materials 63-64 (June 2011): 421–24. http://dx.doi.org/10.4028/www.scientific.net/amm.63-64.421.

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Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. The seismic response analysis result considering that pile-soil-structure interaction was compared with that of withou

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Basgall, E. J., and N. Winograd. "Uncoated Lvsem and Imaging Tof-Sims of Unfixed, Plunge Frozen, Freeze Dried, Fungal and Plant Material." Microscopy and Microanalysis 4, S2 (1998): 850–51. http://dx.doi.org/10.1017/s1431927600024375.

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A Cryosorption Freeze Drying (CFD) system was evaluated for its effectiveness in preparing delicate biological materials for both low voltage-field emission scanning electron microscopy (LVFESEM) and imaging liquid metal (Ga) ion beam, static time-of-flight, secondary ion mass spectrometry (TOF-SIMS). The primary goals of these studies were to investigate the retention of both structural and chemical integrity using fresh cryoprepared biological material which had not been exposed to any chemical fixation and which would not be coated by any conductive material in order to obtain information f

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Reagan, Brandon C., Paul J. Y. Kim, Preston D. Perry, John R. Dunlap, and Tessa M. Burch-Smith. "Spatial distribution of organelles in leaf cells and soybean root nodules revealed by focused ion beam-scanning electron microscopy." Functional Plant Biology 45, no. 2 (2018): 180. http://dx.doi.org/10.1071/fp16347.

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Analysis of cellular ultrastructure has been dominated by transmission electron microscopy (TEM), so images collected by this technique have shaped our current understanding of cellular structure. More recently, three-dimensional (3D) analysis of organelle structures has typically been conducted using TEM tomography. However, TEM tomography application is limited by sample thickness. Focused ion beam-scanning electron microscopy (FIB-SEM) uses a dual beam system to perform serial sectioning and imaging of a sample. Thus FIB-SEM is an excellent alternative to TEM tomography and serial section T

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Lagotzki, Sinja, Michael Friebe, and Axel Boese. "Flexible interventional imaging system based on miniaturized X-ray tubes (FlexScan)." Current Directions in Biomedical Engineering 4, no. 1 (2018): 63–66. http://dx.doi.org/10.1515/cdbme-2018-0016.

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AbstractIn orthopedic hand surgeries C-arms are the standard imaging modalities for procedure and tool guidance. However, the currently used systems have a large footprint and high weight, which can lead to workspace restrictions and difficult positioning of the device at the desired imaging position. The aim of this paper is to present a prototype of a new, flexible, lightweight and small footprint X-ray system, which is capable to create 2D projection images from different orientations. The new design includes a miniaturized Xray tube covered in a custom-made case mounted on a flexible holdi

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Miao, Feng, Wang Bo, and Guan Ping. "Research of Longitudinal Seismic Response of Self-Anchored Cable-Stayed Suspension Bridge under Pile-Soil-Structure Interaction." Advanced Materials Research 255-260 (May 2011): 1167–70. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1167.

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Based on scheme of Dalian gulf cross-sea bridge, in this paper, a 3-dimensional FE model for Self-anchored cable-stayed suspension bridge is established with finite element program and pile-soil-structure interaction is simulated by use of the equivalent embed fixation model. Based on the FE model, model analysis is carried out and the effects of pile-soil-structure interaction on dynamic behavior of long-span self-anchored cable-stayed suspension bridge are specially studied. The seismic response analysis result considering that pile-soil-structure interaction was compared with that of withou

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MIROSHNYCHENKO, Sergii, Oleksandra MIROSHNYCHENKO, and Yurii KHOBTA. "CALCULATION OF EFFECTIVENESS OF THE VETERINARY X-RAY SYSTEMS PROTECTIVE CABIN." Medical physics – the current status, problems, the way of development. Innovation technologies, no. 1 (2024): 177–83. https://doi.org/10.17721/3041-1491/2024.11-22.

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Introduction. The transition from the use of X-ray film to digital radiography (DR) has made X-ray diagnostics in veterinary clinics simple and efficient. The number of examinations is small compared to medical use, but a significant part of them is performed without anesthesia of the animals by manual fixation of the animals. Such fixation of the animals is usually performed by veterinary clinic staff. Methods. In this work, we measured the dose loads and calculated the protection efficiency of a new cabin for a veterinary X-ray system. Cabins provide protection in space in three coordinates.

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Jain, Sameer, Jonathan Lamb, Oliver Townsend, et al. "Risk factors influencing fracture characteristics in postoperative periprosthetic femoral fractures around cemented stems in total hip arthroplasty." Bone & Joint Open 2, no. 7 (2021): 466–75. http://dx.doi.org/10.1302/2633-1462.27.bjo-2021-0027.r1.

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Aims This study evaluates risk factors influencing fracture characteristics for postoperative periprosthetic femoral fractures (PFFs) around cemented stems in total hip arthroplasty. Methods Data were collected for PFF patients admitted to eight UK centres between 25 May 2006 and 1 March 2020. Radiographs were assessed for Unified Classification System (UCS) grade and AO/OTA type. Statistical comparisons investigated relationships by age, gender, and stem fixation philosophy (polished taper-slip (PTS) vs composite beam (CB)). The effect of multiple variables was estimated using multinomial log

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Allen, T. D., M. W. Goldberg, and S. Reipert. "FEISEM of the cell nucleus: A consideration of parameters." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 1012–13. http://dx.doi.org/10.1017/s0424820100172796.

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The wider usage of field emission scanning instruments over recent years has demonstrated their potential to provide useful information on internal cell structure without the necessity to prepare thin specimens in such a way that allows transmission of the electron beam. Resolution of these instruments at around lnm is comparable to that routinely achieved by TEM of biological samples, allowing high resolution surface imaging of intracellular structure. Over the past five years we have been investigating structural organisation of cell nuclei using a Topcon ABT DS130F instrument with a Schottk

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Klvac, Ondrej, Stubianova Zuzana Stravova, Šárka Paušová, and Karel Bouzek. "Study of Rapic Capacity Fade in Prismatic Li-ion Cells with Flexible Packaging." Scientific reports 14, no. 1 (2024): 1–15. https://doi.org/10.1038/s41598-024-77673-3.

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Prismatic lithium-ion batteries (LIBs) are considered promising electric energy sources in electromobility applications due to their cell to pack density. However, their sensitivity to external and internal influences, and reduced durability lead to inflation risk and potential explosions throughout their lifecycle. These critical processes are strongly influenced by the inner construction of the cell, especially concerning the coating and mechanical fixation. This study subjects a commercially available prismatic LIB cell to comprehensive, correlative analysis employing various imaging techni

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Birkelbach, Moritz Alexander, Ralf Smeets, Imke Fiedler, et al. "In Vitro Feasibility Analysis of a New Sutureless Wound-Closure System Based on a Temperature-Regulated Laser and a Transparent Collagen Membrane for Laser Tissue Soldering (LTS)." International Journal of Molecular Sciences 21, no. 19 (2020): 7104. http://dx.doi.org/10.3390/ijms21197104.

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For the post-surgical treatment of oral wounds and mucosal defects beyond a certain size, the gold standard is still an autologous skin or mucosal graft in combination with complex suturing techniques. A variety of techniques and biomaterials has been developed for sutureless wound closure including different tissue glues or collagen patches. However, no wound covering that enables for sutureless fixation has yet been introduced. Thus, a new system was developed that allows for sutureless wound covering including a transparent collagen membrane, which can be attached to the mucosa using a spec

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López, Claudia S., Erin S. Stempinski, Raakhee Shankar, Rodolfo Alvarado, and Steven L. Goodman. "Applications of mPrep Automated Specimen Processors in Core Biomedical Research Electron Microscopy Labs." Microscopy Today 33, no. 3 (2025): 39–46. https://doi.org/10.1093/mictod/qaaf026.

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Abstract Biological electron microscopy (EM) of specimens prepared using chemical fixation, heavy metal staining, and resin embedding has advanced the biosciences for over half a century. These chemical preparation methods are applied every day to research and clinical transmission EM, the rapidly growing discipline of 3D volume EM, for correlative EM with light and X-ray microscopy, and for freeze-substitution cryogenic preparation EM. While EM imaging and image analysis are becoming increasingly automated, most research labs still perform their specimen preparation manually using commodity l

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Gerszten, Peter C., Cihat Ozhasoglu, Steven A. Burton, Shalom Kalnicki, and William C. Welch. "Feasibility of frameless single-fraction stereotactic radiosurgery for spinal lesions." Neurosurgical Focus 13, no. 4 (2002): 1–6. http://dx.doi.org/10.3171/foc.2002.13.4.3.

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Object The role of stereotactic radiosurgery for the treatment of intracranial lesions is well established. Its use for the treatment of spinal lesions has been limited by the availability of effective target-immobilizing devices. In this study the authors evaluated the CyberKnife Real-Time Image-Guided Radiosurgery System for spinal lesion treatment involving a single-fraction radiosurgical technique. Methods This frameless image-guided radiosurgery system uses the coupling of an orthogonal pair of x-ray cameras to a dynamically manipulated robot-mounted linear accelerator possessing six degr

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Ryu, Stephen I., Steven D. Chang, Daniel H. Kim, et al. "Image-guided Hypo-fractionated Stereotactic Radiosurgery to Spinal Lesions." Neurosurgery 49, no. 4 (2001): 838–46. http://dx.doi.org/10.1097/00006123-200110000-00011.

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Abstract OBJECTIVE This article demonstrates the technical feasibility of noninvasive treatment of unresectable spinal vascular malformations and primary and metastatic spinal tumors by use of image-guided frameless stereotactic radiosurgery. METHODS Stereotactic radiosurgery delivers a high dose of radiation to a tumor volume or vascular malformation in a limited number of fractions and minimizes the dose to adjacent normal structures. Frameless image-guided radiosurgery was developed by coupling an orthogonal pair of x-ray cameras to a dynamically manipulated robot-mounted linear accelerator

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Edström, Erik, Gustav Burström, Rami Nachabe, Paul Gerdhem, and Adrian Elmi Terander. "A Novel Augmented-Reality-Based Surgical Navigation System for Spine Surgery in a Hybrid Operating Room: Design, Workflow, and Clinical Applications." Operative Neurosurgery 18, no. 5 (2019): 496–502. http://dx.doi.org/10.1093/ons/opz236.

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Abstract BACKGROUND Treatment of several spine disorders requires placement of pedicle screws. Detailed 3-dimensional (3D) anatomic information facilitates this process and improves accuracy. OBJECTIVE To present a workflow for a novel augmented-reality-based surgical navigation (ARSN) system installed in a hybrid operating room for anatomy visualization and instrument guidance during pedicle screw placement. METHODS The workflow includes surgical exposure, imaging, automatic creation of a 3D model, and pedicle screw path planning for instrument guidance during surgery as well as the actual sc

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Vadalà, G., G. F. Papalia, F. Russo, et al. "DEVIATION FROM PREOPERATIVE PLANNING AND ACCURACY OF TRANSPEDICULAR SCREW FIXATION USING INTRAOPERATIVE 3D NAVIGATION FOR LUMBAR SPONDYLOLISTHESIS." Orthopaedic Proceedings 106-B, SUPP_18 (2024): 48. http://dx.doi.org/10.1302/1358-992x.2024.18.048.

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IntroductionIntraoperative navigation systems for lumbar spine surgery allow to perform preoperative planning and visualize the real-time trajectory of pedicle screws. The aim of this study was to evaluate the deviation from preoperative planning and the correlations between screw deviation and accuracy.MethodPatients affected by degenerative spondylolisthesis who underwent posterior lumbar interbody fusion using intraoperative 3D navigation since April 2022 were included. Intraoperative cone-beam computed tomography (CBCT) was performed before screw planning and following implantation. The de

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Vadalà, G., G. F. Papalia, F. Russo, et al. "EVALUATION OF CLINICAL OUTCOMES AND ACCURACY IN TRANSPEDICULAR SCREW FIXATION USING INTRAOPERATIVE CT-GUIDED NAVIGATION FOR LUMBAR SPONDYLOLISTHESIS." Orthopaedic Proceedings 106-B, SUPP_1 (2024): 9. http://dx.doi.org/10.1302/1358-992x.2024.1.009.

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The use of intraoperative navigation and robotic surgery for minimally invasive lumbar fusion has been increasing over the past decade. The aim of this study is to evaluate postoperative clinical outcomes, intraoperative parameters, and accuracy of pedicle screw insertion guided by intraoperative navigation in patients undergoing lumbar interbody fusion for spondylolisthesis. Patients who underwent posterior lumbar fusion interbody using intraoperative 3D navigation since December 2021 were included. Visual Analogue Scale (VAS), Oswestry Disability Index (ODI), and Short Form Health Survey-36

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Murphy, Martin J., Steven Chang, Iris Gibbs, Quynh-Tu Le, David Martin, and Daniel Kim. "Image-guided radiosurgery in the treatment of spinal metastases." Neurosurgical Focus 11, no. 6 (2001): 1–7. http://dx.doi.org/10.3171/foc.2001.11.6.7.

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Object The authors describe a new method for treating metastatic spinal tumors in which noninvasive, image-guided, frameless stereotactic radiosurgery is performed. Stereotactic radiosurgery delivers a high dose of radiation in a single or limited number of fractions to a lesion while maintaining delivery of a low dose to adjacent normal structures. Methods Image-guided radiosurgery was developed by coupling an orthogonal pair of real-time x-ray cameras to a dynamically manipulated robot-mounted linear accelerator that guides the radiation beam to treatment sites associated with radiographic l

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Assaf, Joseph, Louis Hardan, Cynthia Kassis, et al. "Influence of Resin Cement Thickness and Elastic Modulus on the Stress Distribution of Zirconium Dioxide Inlay-Bridge: 3D Finite Element Analysis." Polymers 13, no. 22 (2021): 3863. http://dx.doi.org/10.3390/polym13223863.

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The mechanical properties and the thickness of the resin cement agents used for bonding inlay bridges can modify the clinical performance of the restoration such as debonding or prosthetic materials fracture. Thus, the aim of this study was to evaluate the stress distribution and the maximum strain generated by resin cements with different elastic moduli and thicknesses used to cement resin-bonded fixed partial denture (RBFPD). A three-dimensional (3D) finite element analysis (FEA) was used, and a 3D model was created based on a Cone-Beam Computed Tomography system (CBCT). The model was analyz

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Ко, Мин Ко, Алексеевич Тарануха Николай та Евгеньевич Сысоев Олег. "Математическая модель определения коэффициента демпфирования для конструкционных материалов". Вестник Инженерной школы ДВФУ, № 3(60) (30 вересня 2024): 3–10. http://dx.doi.org/10.24866/2227-6858/2024-3/3-10.

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В настоящее время при проектировании машин, механизмов и строительных конструкций в большинстве случаев не учитываются эффекты возникновения резонанса конструкций при совпадении собственных и вынужденных колебаний механических систем. На эти эффекты сильное влияние оказывают демпфирующие свойства конструкционных материалов. В данной статье предложена математическая модель определения демпфирующих свойств материала колеблющейся механической системы с учетом внутреннего сопротивления материала. Главной сложностью является вычленение демпфирующих свойств материала из общих демпфирующих характерис

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Sera, Toshihiro, Hideki Fujioka, Hideo Yokota, et al. "Localized compliance of small airways in excised rat lungs using microfocal X-ray computed tomography." Journal of Applied Physiology 96, no. 5 (2004): 1665–73. http://dx.doi.org/10.1152/japplphysiol.00624.2003.

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Airway compliance is a key factor in understanding lung mechanics and is used as a clinical diagnostic index. Understanding such mechanics in small airways physiologically and clinically is critical. We have determined the “morphometric change” and “localized compliance” of small airways under “near”-physiological conditions; namely, the airways were embedded in parenchyma without dehydration and fixation. Previously, we developed a two-step method to visualize small airways in detail by staining the lung tissue with a radiopaque solution and then visualizing the tissue with a cone-beam microf

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Trapezon, Kirill, and Alexandr Trapezon. "Analytical study of the natural bending oscillations of a concave beam with parabolic change in thickness." Eastern-European Journal of Enterprise Technologies 3, no. 7 (111) (2021): 15–23. http://dx.doi.org/10.15587/1729-4061.2021.230820.

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The synthesis of factorization and symmetry methods produced a general analytical solution to the fourth-order differential equation with variable coefficients. The form and structure of the variable coefficients correspond, in this case, to the problem of the oscillations of a concave beam of variable thickness. The solution to this equation makes it possible to study in detail the oscillations of such and similar, for example convex, beams at the different fixation of their ends' sections. A practical confirmation has been obtained that the beam whose thickness changes in line with the conca

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Zlatkov, Dragan, Slavko Zdravkovic, Marina Mijalkovic, Biljana Mladenovic, and Tomislav Igic. "Redistribution of the influences in systems with semi-rigid joints on elastic foundations." Facta universitatis - series: Architecture and Civil Engineering 8, no. 2 (2010): 225–34. http://dx.doi.org/10.2298/fuace1002225z.

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Most often, in the case of typefied prefabricated systems, foundations are designed and constructed as prefabricated elements as well. When the structure is exposed to high intensity loading and founded on a weak soil, beam foundations are often used instead of pad foundations. Beam foundations, stiffening girders, as well as beams which support the fa?ade elements or partition walls, are treated as beams on elastic foundations, while joint of these girders to pad foundations or vertical support elements of a precast structure can be treated as semi-rigid. Modeling of systems with semi-rigid j

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Sebek, Jan, Steven Goh, Warren L. Beard, et al. "Bronchoscopy-Guided High-Power Microwave Ablation in an in vivo Porcine Lung Model." Biomedicine Hub 9, no. 1 (2024): 108–17. http://dx.doi.org/10.1159/000539864.

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Introduction: Percutaneous microwave ablation (MWA) is clinically accepted for the treatment of lung tumors and oligometastatic disease. Bronchoscopic MWA is under development and evaluation in the clinical setting. We previously reported on the development of a bronchoscopy-guided MWA system integrated with clinical virtual bronchoscopy and navigation and demonstrated the feasibility of transbronchial MWA, using a maximum power of 60 W at the catheter input. Here, we assessed the performance of bronchoscopy-guided MWA with an improved catheter (maximum power handling of up to 120 W) in normal

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Gerszten, Peter C., Cihat Ozhasoglu, Steven A. Burton, et al. "CyberKnife frameless single-fraction stereotactic radiosurgery for tumors of the sacrum." Neurosurgical Focus 15, no. 2 (2003): 1–5. http://dx.doi.org/10.3171/foc.2003.15.2.7.

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Object The role of stereotactic radiosurgery for the treatment of intracranial lesions is well established. The experience with radiosurgery for the treatment of spinal and sacral lesions is more limited. Sacral lesions should be amenable to radiosurgical treatment similar to that used for their intracranial counterparts. The authors evaluated a single-fraction radiosurgical technique performed using the CyberKnife Real-Time Image-Guided Radiosurgery System for the treatment of the sacral lesion. Methods The CyberKnife is a frameless radiosurgery system based on the coupling of an orthogonal p

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Gao, Likun, Yanlin He, Hangwei Zhu, Guangkai Sun, and Lianqing Zhu. "Stiffness Modelling and Performance Evaluation of a Soft Cardiac Fixator Flexible Arm with Granular Jamming." Machines 9, no. 12 (2021): 303. http://dx.doi.org/10.3390/machines9120303.

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To meet the practical application requirements of cardiac fixation during off-pump coronary artery bypass surgery, a soft cardiac fixator with a flexible arm was previously designed. To enable the soft cardiac fixator to adapt to uncertain external forces, this study evaluates the variable-stiffness performance of the flexible arm. First, the flexible arm was simplified as a soft silicone manipulator measuring 60 mm × 90 mm × 120 mm, which can actuate, soften, or stiffen independently along the length of the arm by combining granular jamming with input pressure. Then, the soft manipulator was

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Арутюнов, С. Д., А. А. Южаков, И. И. Безукладников та ін. "Влияние параметров крепления бионического уха на характеристики звукового сигнала". Vestnik of Volga State University of Technology. Series Radio Engineering and Infocommunication Systems, № 3(59) (20 листопада 2023): 74–84. https://doi.org/10.25686/2306-2819.2023.3.74.

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В статье выполнен анализ амплитудно-частотных и временных показателей предлагаемого научно-исследовательской группой технологического решения для реализации проекта по разработке «бионического протеза ушной раковины». Целью работы является изучение влияния параметров крепления бионического уха на характеристики звукового сигнала для дальнейшего определения оптимального положения имплантатов. Для решения поставленных задач был создан тестовый стенд, на котором выполнены экспериментальные исследования, на основании полученных данных сделаны выводы об отсутствии влияния геометрических расстояний

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Nleya, T., F. Walley, and A. Vandenberg. "Response of four common bean cultivars to granular inoculant in a short-season dryland production system." Canadian Journal of Plant Science 81, no. 3 (2001): 385–90. http://dx.doi.org/10.4141/p00-098.

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Common bean (Phaseolus vulgaris L.) is considered to be a poor N fixer relative to other legumes. However, considerable genotypic variability between cultivars is known to exist. Determining the importance of the host genotype to the symbiotic process will assist breeders in developing bean cultivars with improved N2 fixing capacity. Field experiments were conducted at two locations in Saskatchewan for two seasons to assess the N2 fixation rates of four common bean cultivars differing in growth habit and maturity. Beans were inoculated using a granular inoculant applied in the seedrow or in a

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Kuleshov, A. A., I. N. Lisyansky, M. S. Vetrile, N. S. Gavryushenko, and L. V. Fomin. "Comparative Experimental Study of Hook and Pedicle Fixation Systems Used at Surgical Treatment of Spine Deformities." N.N. Priorov Journal of Traumatology and Orthopedics 19, no. 3 (2012): 20–24. http://dx.doi.org/10.17816/vto20120320-24.

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Using human cadaver spines we compared the stiffness of pedicle screws and laminar hooks under cyclic and static pull-out loads. Transpedicular and hook fixation (sub- and supralaminar) of cadaveric thoracic spine segments was performed. Axial pull-out strength was measured using w+b (walter + bai ag) servoelectric testing machine (LFV-10-T50, Switzerland). Static pull-out tests were performed on 7 spine blocks with transpedicular and 7 blocks with hook fixation. The same blocks were tested under cyclic loads. At cyclic pull-out loading 800 N strength with 5 Hz frequency was applied. It was sh

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Gerszten, Peter C., Cihat Ozhasoglu, Steven A. Burton, et al. "CyberKnife frameless single-fraction stereotactic radiosurgery for benign tumors of the spine." Neurosurgical Focus 14, no. 5 (2003): 1–5. http://dx.doi.org/10.3171/foc.2003.14.5.17.

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Object The role of stereotactic radiosurgery in the treatment of benign intracranial lesions is well established. Its role in the treatment of benign spinal lesions is more limited. Benign spinal lesions should be amenable to radiosurgical treatment similar to their intracranial counterparts. In this study the authors evaluated the effectiveness of the CyberKnife for benign spinal lesions involving a single-fraction radiosurgical technique. Methods The CyberKnife is a frameless radiosurgery system in which an orthogonal pair of x-ray cameras is coupled to a dynamically manipulated robot-mounte

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Abd-Alla, M. H. "Nodulation and nitrogen fixation in interspecies grafts of soybean and common bean is controlled by isoflavonoid signal molecules translocated from shoot." Plant, Soil and Environment 57, No. 10 (2011): 453–58. http://dx.doi.org/10.17221/379/2010-pse.

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&nbsp; Identification of common signals of nodulation control among legume species will facilitate progress in enhancing symbiotic nitrogen fixation of legumes in sustainable agriculture system. Grafting experiments between soybean and common bean were carried out to evaluate whether a common shoot signals control the expression of hypernodulation among the tow species. Grafting of a hypernodulating soybean mutant NOD1-3 shoots to three cultivars of normally nodulating common bean roots resulted in hypernodulation on roots of three tested cultivars of common bean. The shoot control of hype

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Rochester, I. J., M. B. Peoples, G. A. Constable, and R. R. Gault. "Faba beans and other legumes add nitrogen to irrigated cotton cropping systems." Australian Journal of Experimental Agriculture 38, no. 3 (1998): 253. http://dx.doi.org/10.1071/ea97132.

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Summary. Legumes have become common rotation crops in cotton cropping systems in northern New South Wales. Levels of nitrogen fixation and yield achieved on-farm were measured in commercial faba beans and other winter and summer legume crops sown after cotton over 3 years to assess the relative inputs of fixed nitrogen (N) into this system. Faba bean crops fixed up to 350 kg N/ha, removed up to 160 kg N/ha in harvested grain and contributed up to 270 kg fixed N/ha to soil N after harvest. Grain yields, N2 fixation and dry matter production were reduced in late-sown crops and those water-stress

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Parvin, Shahnaj, Jason Condon, and Terry J. Rose. "Potential Nitrogen Contributions by Tropical Legume Summer Cover Crops in Mediterranean-Type Cropping Systems." Nitrogen 3, no. 4 (2022): 592–99. http://dx.doi.org/10.3390/nitrogen3040038.

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Legume cover crops in temperate cropping systems can fix substantial amounts of nitrogen (N) and reduce N fertiliser requirements for subsequent crops. However, little is known about potential biological N2 fixation by summer cover crop legumes in the short summer fallow in Mediterranean-type cropping systems. Six legume species (balansa clover, barrel medic, mung bean, sunn hemp, lablab and cowpea) were grown for 8–9 weeks in the field in semi-arid southern Australia during the summer fallow, and in a glasshouse experiment, to estimate N2 fixation using the 15N natural abundance method. Cowpe

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