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5,292 results for “implants”
Cochlear Implant Compression Optimization for Music Listening - Maplaw and AGC
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Musical consonance-dissonance task in normal hearing and cochlear implant users
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Tumor growth kinetics of subcutaneously implanted Lewis Lung carcinoma cells
<p><strong>Please cite</strong><br> Benzekry, S., Lamont, C., Beheshti, A., Tracz, A., Ebos, J. M. L., Hlatky, L., & Hahnfeldt, P. (2014). Classical mathematical models for description and prediction of experimental tumor growth. <em>PLoS Computational Biology</em>, <em>10</em>(8), e1003800. http://doi.org/10.1371/journal.pcbi.1003800</p> <p><strong>Cell culture</strong><br> Murine Lewis lung carcinoma (LLC) cells, originally derived from a spontaneous tumor in a C57BL/6 mouse [1], were obtained from American Type Culture Collection (Manassas, VA). </p> <p><strong>Tumor injections</strong><br> For the subcutaneous mouse syngeneic lung tumor model, C57BL/6 male mice with an average lifespan of 878 days were used [2]. At time of injection mice were 6 to 8 weeks old (Jackson Laboratory, Bar Harbor, Maine). Subcutaneous injections of 10<sup>6</sup> LLC cells in 0.2 ml phosphate-buffered saline (PBS) were performed on the caudal half of the back in anesthetized mice.</p> <p><strong>Tumor measurements</strong><br> Tumor size was measured regularly with calipers to a maximum of 1.5 cm<sup>3</sup> for the lung data set. Largest (L) and smallest (w) diameters were measured subcutaneously using calipers and the formula V = <span class="math-tex">\(\frac{\pi}{6}w^2 L\)</span> was then used to compute the volume (ellipsoid). Volumes ranged 14–1492 mm<sup>3</sup> over time spans from 4 to 22 days for the lung tumor model (two experiments of 10 animals each).</p> <p>[1] Bertram JS, Janik P (1980) Establishment of a cloned line of Lewis Lung Carcinoma cells adapted to cell culture. Cancer Lett 11: 63–73. Available: http://www.ncbi.nlm.nih.gov/pubmed/7226139. Accessed 9 July 2013.</p> <p>[2] Kunstyr I, Leuenberger HG (1975) Gerontological data of C57BL/6J mice. I. Sex differences in survival curves. J Gerontol 30: 157–162. Available: http:// www.ncbi.nlm.nih.gov/pubmed/1123533. Accessed 9 July 2013.</p>
Dataset related to publication "In silico evaluation of the thermal stress induced by MRI switched gradient fields in patients with metallic hip implant"
<p>The datasets reported in the figures of the article "In silico evaluation of the thermal stress induced by MRI switched gradient fields in patients with metallic hip implant", published on Phys. Med. Biol. 64 245006, 2019.</p> <p>This work focuses on the in silico evaluation of the energy deposed by MRI switched gradient fields<br> in bulk metallic implants and the consequent temperature increase in the surrounding tissues. The results show that the gradient coils can generate local increases of temperature up to some kelvin when acting without radiofrequency excitation. Hence, their contribution in general should not be disregarded when evaluating patients’ safety.</p>
Failed Total Hip Arthroplasty: Diagnostic Performance of Conventional MRI Features and Locoregional Lymphadenopathy to Identify Infected Implants
<p><strong>Background: </strong>Very little has been published about the diagnostic performance of MRI in total hip arthroplasty (THA) infection.</p> <p><strong>Purpose: </strong>To determine the diagnostic performance of conventional MRI features and of new lymph nodal indices to identify infection in patients with failed THA.</p> <p><strong>Study type: </strong>Retrospective.</p> <p><strong>Population: </strong>In all, 119 patients (66 females; age 66.9 ± 12.4 years) with failed THA.</p> <p><strong>Field strength/sequences: </strong>Metal artifact reduction sequence (MARS) protocol including short tau inversion recovery and turbo spin-echo T<sub>1</sub> - and T<sub>2</sub> -weighted sequences at 1.5T.</p> <p><strong>Assessment: </strong>Patients underwent pelvis MRI prior to failed THA revision. MRIs were reviewed to identify periprosthetic bone destruction, soft-tissue mass, effusion, synovitis, lamellated synovitis, extracapsular edema, fibrous periprosthetic membrane, bone edema, and extracapsular collection/sinus tract. The number and maximum diameter of inguinal, obturator and iliac lymph nodes of the affected hip were assessed and normalized to those of the unaffected hip to calculate the ratio of nodal size (RNS), ratio of node number (RNN), difference of nodal size (DNS), and difference of node number (DNN).</p> <p><strong>Statistical tests: </strong>The Mann-Whitney U-and chi-square test were used. Diagnostic performance of indices and odds ratios (OR) were calculated.</p> <p><strong>Results: </strong>RNS, RNN, DNS, and DNN indices were significantly different (P = 0.000) between infected and noninfected THA, with accuracies ranging from 84.8% (RNS) and 93.1% (RNN). All other MRI features were significantly more prevalent in infected THA (P ≤ 0.002), except bone destruction, periarticular soft-tissue mass, and fibrous membrane (P ≥ 0.031). Sensitivities ranged from 7.9% (soft-tissue mass) to 76.3% (effusion/bone edema), specificity from 45.7% (bone destruction) to 97.5% (synovitis/lamellated synovitis), accuracy from 49.6% (bone destruction) to 81.5% (synovitis), OR from 0.261 (soft-tissue mass) to 35.550 (synovitis).</p> <p><strong>Data conclusion: </strong>Conventional MRI features have limited accuracy to differentiate septic and aseptic THA failure. Lymph nodal indices, particularly those related to nodal number, may represent biomarkers of THA infection.</p>
Implantation of a dual-chamber automatic cardioverter defibrillator in a patient with persistent left superior vena cava: case report and brief literature review
<p>Video 1. Transthoracic echocardiography, parasternal long axis – dilated left ventricle with hypokinesia of ventricular walls and atrial enlargement; Video 2. Transthoracic echocardiography – apical view revealing the moderate functional mitral regurgitation; Video 3. Intraprocedural standard anteroposterior fluoroscopic view with the atrial and ventricular lead in place; Video 4. Intraprocedural fluoroscopic view (right anterior oblique projection at 30 degrees): atrial lead in the anterior RAA, ventricular lead at the apex of the right ventricle; Video 5. Venography performed by standard fluoroscopy through a catheter placed at the level of the left median cubital vein: left SVC draining in the right atrium via the coronary sinus; obstruction of the innominate vein, with no contrast flow; residual stenosis/kinking at the border between left SVC and CS; Video 6. Venography performed by standard fluoroscopy through a catheter placed at the level of the right median cubital vein: right SVC draining in the right atrium; obstruction of the innominate vein with no contrast flow.</p>
Data from: Numerical models for assessing the risk of leaflet thrombosis post-transcatheter aortic valve-in-valve implantation
<p>Leaflet thrombosis has been suggested as the reason for the reduced leaflet motion in cases of hypoattenuated leaflet thickening of bioprosthetic aortic valves. This work aimed to estimate the risk of leaflet thrombosis in two post-ViV configurations, using five different numerical approaches. Realistic ViV configurations were calculated by modeling the deployments of the latest version of transcatheter aortic valve devices (Medtronic Evolut PRO, Edwards SAPIEN 3) in the surgical Sorin Mitroflow. Computational fluid dynamics simulations of blood flow followed the dry models. Lagrangian and Eulerian measures of near-wall stagnation were implemented by particle and concentration tracking, respectively, to estimate the thrombogenicity and to predict the risk locations. Most of the numerical approaches indicate on a higher leaflet thrombosis risk in the Edwards SAPIEN 3 device because of its intra-annular implantation. The Eulerian approaches estimated high-risk locations in agreement with the WSS separation points. On the other hand, the Lagrangian approaches predicted high-risk locations at the proximal regions of the leaflets matching the low WSS magnitude regions of both TAVI models and reported clinical and experimental data. The proposed methods can help optimizing future designs of transcatheter aortic valves with minimal thrombotic risks.</p>
Electrical properties of Bi-implanted amorphous chalcogenide films
<p>Y. G. Fedorenko<sup>1a</sup>, M. A. Hughes<sup>1</sup>, J. L. Colaux<sup>1</sup>, C. Jeynes<sup>1</sup>, R. M. Gwilliam<sup>1</sup>, K. Homewood<sup>1</sup>, B. Gholipour<sup>2</sup>, J. Yao<sup>2</sup>, D. W. Hewak<sup>2</sup>, T.-H. Lee<sup>3</sup>, S. R. Elliott<sup>3</sup> and R. J. Curry<sup>1</sup></p> <p><sup>1</sup>Advanced Technology Institute, Department of Electronic Engineering, University of Surrey, Guildford, GU2 7XH, United Kingdom</p> <p><sup>2</sup>Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, United Kingdom</p> <p><sup>3</sup>Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom</p> <p> </p> <p><sup>a</sup>Present address: Department of Physics, University of Liverpool, The Oliver Lodge Laboratory, Liverpool L69 7ZE, United Kingdom</p>
Development of a flow chamber system for the reproducible in vitro analysis of biofilm formation on implant materials
<p>The data provided are the original data from the microscopic investigation of oral bacterial biofilms. Bacteria were stained with a life/dead staining. Viable cells are represented in red, non-viable cells are shown in green. The biofilms were gained by 50 stacks each with a CLSM. The biofilms were formed in a flow chamber system with a flow velocity of 100µL/min over 24-72 hours. The biofilms were grown on tintanium discs.</p>
MicroCT and CECT-based images of a Zn alloy explant after 84 days of implantation in the rat abdominal aorta.
<p><span>(A) MicroCT slices showing the wire and the corrosion products and (B) CECT slices after staining with Lugol for 17 h showing the wire, the corrosion products, and the surrounding soft tissue for a Zn alloy explant.</span></p>
CECT-based images a Zn alloy explant, after 84 days of implantation in the rat abdominal aorta.
<p><span>(A) The original grayscale slices, (B) the segmentation of the wire, the aorta, and the neointima, and (C) the segmentation of the wire, the aorta, the neointima, and the corrosion products.</span></p>
Same day implant bridge (SDIB) modified technique for full-arch implant fixed rehabilitation for a Kelly syndrome pa-tient with atrophic maxilla.
<p><span>Combined syndrome (CS) or also known as "anterior hyperfunction syndrome" was first described by Ellsworth Kelly in 1972 is a dental condition commonly seen in patients with a completely edentulous maxilla and a partially edentulous mandible with preserved anterior teeth, where five characteristic features of the syndrome can be seen: loss of bone from the anterior part of the maxillary crest, excessive growth of the maxillary tuberosities, papillary hyperplasia of the mucosa of the hard palate, extrusion of the lower anterior teeth and alveolar bone loss and ridge height beneath mandibular removable denture bases. This report describes an implant treatment of the edentulous maxilla using the ALL ON FOUR (AO4) technique and a partially edentulous mandible that was treated with the same post-extraction technique. The need for a multidisciplinary approach for the prevention and early treatment of this complex condition is emphasized.</span></p> <p><strong><span>Keywords:</span></strong><span>resorbed maxilla; hypertrophic bone; atrophic bone; Kelly syndrome; anterior </span></p>
Superior Survival of Fully Cemented Fixation Compared to Hybrid Fixation in a Single Design Rotating Hinge Knee Implant
<p><span>Dataset with 275 RT-PLUS® rotating hinge knee implants (Smith and Nephew, Memphis, TN, USA) in 269 patients (60 primary procedures, 215 revisions). Of the 275 implants, 248 had a uniform fixation technique for both components (148 fully hybrid, 100 fully cemented), while 27 implants had a mixed fixation technique for the components (15 hybrid femur and fully cemented tibia, 12 fully cemented femur and hybrid tibia). Outcome was revision for aspectic loosening. The median follow-up was 7.3 ± 3.9 years, with a minimum of 2 years for non-failed implants. </span></p>
In vivo evaluation of thermally drawn biodegradable optical fibers as brain implants
<p><strong>Dataset for Thermal, Molecular, and Optical Characterization of PDLLA Optical Fibers</strong></p> <p><span>Parinaz Abdollahian<sup>a,b</sup>,<sup> </sup>Kunyang Sui<sup>a,b</sup>, Guanghui Li<sup>b</sup>, Jiachen Wang<sup>a</sup>, Cuiling Zhang<sup>a</sup>, Yazhou Wang<sup>a</sup>, Rune W. Berg<sup>b</sup>, Marcello Meneghetti<sup>a,b</sup>, and Christos Markos<sup>*a</sup></span></p> <p><span><span>a. Department of Photonics and Electronic Engineering, Denmark Technical University, Denmark</span></span></p> <p><span><span>b. Department of Neuroscience, Copenhagen University, Copenhagen, Denmark</span></span></p> <p><strong>Description</strong>:<br>This dataset includes the experimental data and characterization results for amorphous poly(D,L-lactic acid) (PDLLA) optical fibers used in the study titled "In vivo evaluation of thermally drawn biodegradable optical fibers as brain implants." The dataset comprises the following key measurements:</p> <ol> <li><strong>Differential Scanning Calorimetry (DSC)</strong>: <ul> <li>Thermograms of PDLLA granules as purchased and after quenching, used to analyze thermal transitions.</li> </ul> </li> <li><strong>Gel Permeation Chromatography (GPC)</strong>: <ul> <li>Molecular weight data of PDLLA before and after in vivo degradation.</li> </ul> </li> <li><strong>Optical Transmission</strong>: <ul> <li>Spectral data for PDLLA fibers of different diameters (150 µm, 250 µm, and 320 µm) and their transmission properties before and after in vitro degradation in phosphate-buffered saline (PBS).</li> </ul> </li> </ol> <p><strong>Purpose</strong>:<br>The data support the evaluation of the thermal stability, molecular degradation, and optical performance of PDLLA fibers under in vitro and in vivo conditions. The goal is to assess their suitability as biodegradable neural interfaces for biomedical applications.</p> <p><strong>Methods</strong>:</p> <ul> <li>DSC was performed on a Q 2000 instrument with a temperature range of -10°C to 200°C at a heating rate of 10°C/min and a cooling rate of 50°C/min.</li> <li>GPC was conducted using a TOSOH HLC-8320 to measure molecular weight distributions.</li> <li>Optical transmission was characterized using a broadband supercontinuum source (NKT SuperK Extreme) and an ANDO AQ-6315A optical spectrum analyzer.</li> </ul> <p><strong>File Contents</strong>:</p> <ul> <li>DSC raw and processed data for granules and quenched PDLLA.</li> <li>GPC chromatograms and molecular weight calculations.</li> <li>Transmission spectra for PDLLA fibers, including pre- and post-degradation measurements.</li> </ul>
Transvenous extraction of double dual-coil implantable cardioverter-defibrillator leads – Case report
<p>Abstract: Implantable cardioverter-defibrillator (ICD) is the standard treatment for prevention of sudden cardiac death (SCD) in high-risk patients. Transvenous lead extraction (TLE) is an integral part of management of patients with ICD, since ICD leads are prone to damage in long-term follow-up. TLE is a procedure with high risk of complications. Major complications include haemothorax , thromboembolic events, vascular laceration, cardiac avulsion, and even death, with pericardial tamponade beeing the most common major complication. We report the clinical case of a 54-year-old male patient with a history of chronically implanted ICD who presented with isolated pocket erosion. Cardiac fluoroscopy revealed one dual-coil ICD lead connected to the pulse generator and another dual-coil ICD lead was noted to be fractured, with the proximal end lead remnant in the ICD pocket. Suspicion of pocket infection was raised, therefore the device and the leads extractions were necessary. Dual-coil implantable cardioverter-defibrillator leads are difficult to extract due to fibrotic scar tissue formed around the leads especially near the coils. Transvenous lead extraction technique was used to remove the dual-coil implantable cardioverter-defibrillator leads, without neither major nor minor complications. As ICD therapy was recommended for secondary prophylaxis, a new ICD was implanted on the contralateral side.</p>
ENID - Endometrial Implants Dataset
<p>ENID (ENdometrial Implants DAtaset) comprises 160 images taken from 100+ gynecologic laparoscopy surgeries and is purposefully created to be utilized for a variety of automatic content analysis problems in the context of Endometriosis recognition. ENID is the result of experiments on reorganizing previously published dataset <a href="http://ftp.itec.aau.at/datasets/GLENDA">GLENDA</a> in terms of visual similarity.</p> <p>The dataset includes region-based annotations of a specific visual endometriosis manifestation: dark endometrial implants. Annotations are created for single video frames, which can contain multiple annotations. Each single annotation is exported as a pixel-based image mask: the annotated regions are colored, while the background is left black. Additionally a particular dataset augmentation is provided: ground truth annotations are tracked over time using the original videos. The tracking results are acquired via kernelized correlation filters (KCF).</p> <p>You are kindly requested to cite the original work that led to the creation of the dataset: <a href="https://doi.org/10.1007/s11042-021-11730-1">https://doi.org/10.1007/s11042-021-11730-1</a>.</p> <p>For the latest updates, please visit the dataset's homepage: <a href="http://ftp.itec.aau.at/datasets/Smoke_cholec80/">http://ftp.itec.aau.at/datasets/ENID</a>.</p>
Source data for: Human monoclonal antibodies against Staphylococcus aureus surface antigens recognize in vitro biofilm and in vivo implant infections
<p class="CxSpFirst">Implant-associated <i>Staphylococcus aureus</i> infections are difficult to treat because of biofilm formation. Bacteria in a biofilm are often insensitive to antibiotics and host immunity. Monoclonal antibodies (mAbs) could provide an alternative approach to improve the diagnosis and potential treatment of biofilm-related infections. Here we show that mAbs targeting common surface components of <i>S. aureus</i> can recognize clinically relevant biofilm types. The mAbs were also shown to bind a collection of clinical isolates derived from different biofilm-associated infections (endocarditis, prosthetic joint, catheter). We identify two groups of antibodies: one group that uniquely binds <i>S. aureus </i>in biofilm state and one that recognizes <i>S. aureus </i>in both biofilm and planktonic state. Furthermore, we show that a mAb recognizing wall teichoic acid (WTA; clone 4497) specifically localizes to a subcutaneously implanted pre-colonized catheter in mice. In conclusion, we demonstrate the capacity of several human mAbs to detect <i>S. aureus</i> biofilms<i> in vitro</i> and <i>in vivo</i>.</p>
Data set for paper 'Impact of post-ion implantation annealing on Se-hyperdoped Ge'
<p><strong>Description of the files</strong></p> <p>Files are named by the same figure order appearing in the paper and supplementary material. File types contain:<br>- *.csv: Comma separated values. <br>- *.fibps: Raw data obtained with the 3D optical profilometer, which can be opened and analyzed by ProfilmOnline at https://www.profilmonline.com/. Figures shown in the paper were croped from the top-left corner with areas of about 60x60 µm2 from the raw data. Alternatively all 3D profilometer data shown in the paper can be obtained and analyzed in https://www.profilmonline.com/shared-folder?token=S32NP82HtLC3<br>- *.tif: Image generated from scanning electron microscope. </p> <p> </p> <p><strong>Original paper:</strong> https://doi.org/10.1063/5.0213637</p> <p><strong>Supplementary material:</strong> https://doi.org/10.60893/figshare.apl.c.7322108</p> <p> </p> <p><strong>When using the dataset, please cite the original paper: Xiaolong Liu, Patrick McKearney, Sören Schäfer, Behrad Radfar, Yonder Berencén, Ulrich Kentsch, Ville Vähänissi, Shengqiang Zhou, Stefan Kontermann, Hele Savin; Impact of post-ion implantation annealing on Se-hyperdoped Ge. Appl. Phys. Lett. 22 July 2024; 125 (4): 042102. https://doi.org/10.1063/5.0213637.</strong></p> <p> </p>
Frequency of infraposition and missing contact points in implant supported restorations within natural dentitions over time: a systematic review with meta-analysis
<p>Dataset for the meta-analyses performed in this systematic review</p>
Predicting the failure of dental implants using supervised learning techniques
<p>A total of 747 fixtures from patients who completed their prosthodontics treatments. The dependent variable is dental implant failure; a total of 20 independent variables were collected, including age, gender, factors of missing, systemic disease, tobacco smoking, alcohol consumption, betel nut chewing, department of surgeon, surgeon experience, location of implant, bone density, ridge augmentation, Maxillary sinus augmentation, implant system, fixture length, fixture width, types of prosthesis, angle of abutment, and prosthesis fixation.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.