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External connection implant

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https://www.readbyqxmd.com/read/29128717/in-vivo-bioelectronic-nose-using-transgenic-mice-for-specific-odor-detection
#1
Keqiang Gao, Songmin Li, Liujing Zhuang, Zhen Qin, Bin Zhang, Liquan Huang, Ping Wang
The olfactory system is a natural biosensor since its peripheral olfactory sensory neurons (OSNs) respond to the external stimuli and transmit the signals to the olfactory bulb (OB) where they are integrated and processed. The axonal connections from the OSNs expressing about 1000 different types of odorant receptors are precisely organized and sorted out onto 1800 glomeruli in the OB, from which the olfactory information is delivered to and perceived by the central nervous system. This process is carried out with particularly high sensitivity, specificity and rapidity, which can be used for explosive detection...
October 10, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29094038/intracorporeal-heat-distribution-from-fully-implantable-energy-sources-for-mechanical-circulatory-support-a-computational-proof-of-concept-study
#2
Jacopo Biasetti, Aliaksei Pustavoitau, Pier Giorgio Spazzini
Mechanical circulatory support devices, such as total artificial hearts and left ventricular assist devices, rely on external energy sources for their continuous operation. Clinically approved power supplies rely on percutaneous cables connecting an external energy source to the implanted device with the associated risk of infections. One alternative, investigated in the 70s and 80s, employs a fully implanted nuclear power source. The heat generated by the nuclear decay can be converted into electricity to power circulatory support devices...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29082637/peripheral-nerve-stimulation-for-painful-mononeuropathy-secondary-to-leprosy-a-12-month-follow-up-study
#3
Tiago da Silva Freitas, Erich Talamoni Fonoff, Oswaldo Ribeiro Marquez Neto, Iruena Moraes Kessler, Laura Mendes Barros, Ronan Wilk Guimaraes, Monalisa Ferreira Azevedo
OBJECTIVE: Leprosy affects approximately 10-15 million patients worldwide and remains a relevant public health issue. Chronic pain secondary to leprosy is a primary cause of morbidity, and its treatment remains a challenge. We evaluated the feasibility and safety of peripheral nerve stimulation (PNS) for painful mononeuropathy secondary to leprosy that is refractory to pharmacological therapy and surgical intervention (decompression). METHODS: Between 2011 and 2013 twenty-three patients with painful mononeuropathy secondary to leprosy were recruited to this prospective case series...
October 29, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29067533/double-flanged-haptic-and-capsular-tension-ring-or-segment-for-sutureless-fixation-in-zonular-instability
#4
Sergio Canabrava, Leticia Bernardino, Thais Batisteli, Gabriella Lopes, Alberto Diniz-Filho
PURPOSE: This paper introduces a surgical technique for the sutureless management of zonular dialysis greater than 120° using a capsular tension segment (CTS) or a modified capsular tension ring (m-CTR; CTR with suturing eyelets) and a haptic removed from a 3-piece polypropylene IOL. METHODS: A CTR is used as normal. Cataract removal is followed by connection of the CTS or m-CTR to the single haptic and created using heat to make a flange in one haptic's extremity...
October 24, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29059850/rodent-wearable-ultrasound-system-for-wireless-neural-recording
#5
David K Piech, Joshua E Kay, Bernhard E Boser, Michel M Maharbiz
Advances in minimally-invasive, distributed biological interface nodes enable possibilities for networks of sensors and actuators to connect the brain with external devices. The recent development of the neural dust sensor mote has shown that utilizing ultrasound backscatter communication enables untethered sub-mm neural recording devices. These implanted sensor motes require a wearable external ultrasound interrogation device to enable in-vivo, freely-behaving neural interface experiments. However, minimizing the complexity and size of the implanted sensors shifts the power and processing burden to the external interrogator...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29045017/connecting-biology-to-electronics-molecular-communication-via-redox-modality
#6
REVIEW
Yi Liu, Jinyang Li, Tanya Tschirhart, Jessica L Terrell, Eunkyoung Kim, Chen-Yu Tsao, Deanna L Kelly, William E Bentley, Gregory F Payne
Biology and electronics are both expert at for accessing, analyzing, and responding to information. Biology uses ions, small molecules, and macromolecules to receive, analyze, store, and transmit information, whereas electronic devices receive input in the form of electromagnetic radiation, process the information using electrons, and then transmit output as electromagnetic waves. Generating the capabilities to connect biology-electronic modalities offers exciting opportunities to shape the future of biosensors, point-of-care medicine, and wearable/implantable devices...
October 18, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29039642/self-powered-nanocomposites-under-an-external-rotating-magnetic-field-for-noninvasive-external-power-supply-electrical-stimulation
#7
Fengluan Wu, Long Jin, Xiaotong Zheng, Bingyun Yan, Pandeng Tang, Huikai Yang, Weili Deng, Weiqing Yang
Electrical stimulation in biology and gene expression has attracted considerable attention in recent years. However, it is inconvenient that the electric stimulation needs to be supplied an implanted power-transported wire connecting the external power supply. Here, we fabricated a self-powered composite nanofiber (CNF) and developed an electric generating system to realize electrical stimulation based on the electromagnetic induction effect under an external rotating magnetic field. The self-powered CNFs generating an electric signal consist of modified MWNTs (m-MWNTs) coated Fe3O4/PCL fibers...
November 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28971013/presurgical-thalamocortical-connectivity-is-associated-with-response-to-vagus-nerve-stimulation-in-children-with-intractable-epilepsy
#8
George M Ibrahim, Priya Sharma, Ann Hyslop, Magno R Guillen, Benjamin R Morgan, Simeon Wong, Taylor J Abel, Lior Elkaim, Iahn Cajigas, Ashish H Shah, Aria Fallah, Alexander G Weil, Nolan Altman, Byron Bernal, Santiago Medina, Elysa Widjaja, Prasanna Jayakar, John Ragheb, Sanjiv Bhatia
Although chronic vagus nerve stimulation (VNS) is an established treatment for medically-intractable childhood epilepsy, there is considerable heterogeneity in seizure response and little data are available to pre-operatively identify patients who may benefit from treatment. Since the therapeutic effect of VNS may be mediated by afferent projections to the thalamus, we tested the hypothesis that intrinsic thalamocortical connectivity is associated with seizure response following chronic VNS in children with epilepsy...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28934739/differential-pressure-shunt-for-simultaneous-diversion-of-ventricular-fluid-and-extracerebral-fluid
#9
Daniel Craig, Ken R Winston, Zach Folzenlogen, Kathryn A Beauchamp
BACKGROUND/AIMS: The management of extracerebral collections of fluid in patients with hydrocephalus can be problematic for either their simultaneous separate management or sequential management, each of which may require multiple surgeries and the management of external drains. The object of this report is to review the experience with a shunt configuration that simultaneously diverts ventricular fluid and extracerebral fluid, whether subdural or subarachnoid in location, through different outflow resistances...
September 22, 2017: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28874994/comparison-of-fit-accuracy-and-torque-maintenance-of-zirconia-and-titanium-abutments-for-internal-tri-channel-and-external-hex-implant-connections
#10
Hakimeh Siadat, Elaheh Beyabanaki, Niloufar Mousavi, Marzieh Alikhasi
PURPOSE: This in vitro study aimed to evaluate the effect of implant connection design (external vs. internal) on the fit discrepancy and torque loss of zirconia and titanium abutments. MATERIALS AND METHODS: Two regular platform dental implants, one with external connection (Brånemark, Nobel Biocare AB) and the other with internal connection (Noble Replace, Nobel Biocare AB), were selected. Seven titanium and seven customized zirconia abutments were used for each connection design...
August 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28867525/a-customised-digitally-engineered-solution-for-fixed-dental-rehabilitation-in-severe-bone-deficiency-a-new-innovative-line-extension-in-implant-dentistry
#11
Nils-Claudius Gellrich, Rüdiger M Zimmerer, Simon Spalthoff, Philipp Jehn, Philipp-Cornelius Pott, Majeed Rana, Björn Rahlf
OBJECTIVES: Numerous procedures including soft and hard tissue reconstructions are necessary to allow for final implant-borne dental rehabilitation in patients with severe alveolar atrophy or resected jaws. In these cases, customised digitally engineered patient solutions for fixed or removable dental rehabilitation provide an innovative line extension to conventional implant dentistry. MATERIAL AND METHODS: A wax-up was performed on plaster models that were scanned by 3D laser...
October 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28866149/three-dimensional-finite-element-analysis-of-occlusal-splint-and-implant-connection-on-stress-distribution-in-implant-supported-fixed-dental-prosthesis-and-peri-implantal-bone
#12
Vívian Dos Santos Marsico, Roberto Brunow Lehmann, Cristiane Aparecida de Assis Claro, Marina Amaral, Rafael Pino Vitti, Ana Christina Claro Neves, Lais Regiane da Silva Concilio
The aim of this study was to investigate the influence of occlusal splint therapy on the stress distribution of implant-supported fixed dental prosthesis (FDP) and peri-implantal bone structures using three-dimensional (3D) finite element analysis (FEA). The system consisted of two implants (positioned on region of second premolar and second molar) as retainers of fixed porcelain-fused-to-metal 3-unit FDP (first molar as pontic element). Two implant connections systems (external and internal hexagon) were tested...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28842194/development-of-a-head-mounted-wireless-microstimulator-for-deep-brain-stimulation-in-rats
#13
Felix Fluri, Thomas Mützel, Michael K Schuhmann, Miloš Krstić, Heinz Endres, Jens Volkmann
BACKGROUND: Commercial neurostimulators for clinical use are effective in patients; however they are too large and prohibitively expensive for preclinical studies. Thus, there is an urgent need of a small inexpensive and wireless microstimulator which is fully programmable in frequency, pulse width and amplitude for rodent experiments. NEW METHODS: Rats were subjected to a photothrombotic stroke of the right sensorimotor cortex and a microelectrode was implanted in the right mesencephalic locomotor region...
November 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28764310/microleakage-at-the-different-implant-abutment-interface-a-systematic-review
#14
REVIEW
Sunil Kumar Mishra, Ramesh Chowdhary, Shail Kumari
INTRODUCTION: Presence of gap at the implant-abutment interface, leads to microleakage and accumulation of bacteria which can affect the success of dental implants. AIM: To evaluate the sealing capability of different implant connections against microleakage. MATERIALS AND METHODS: In January 2017 an electronic search of literature was performed, in Medline, EBSCO host and Pubmed data base. The search was focused on ability of different implant connections in preventing microleakage...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28757930/efficacy-of-a-new-coating-of-implant-abutment-connections-in-reducing-bacterial-loading-an-in-vitro-study
#15
D Lauritano, C A Bignozzi, D Pazzi, F Cura, F Carinci
BACKGROUND: Titanium is the gold standard for dental implants, since it has demonstrated excellent biocompatibility and osseointegration properties. The rate of osseointegration is however affected by the surface morphology and peri-implant infections may affect fixture and the long-term osseointegration outcome. Thus chemical composition of a coating at the implant-abutment junction (IAJ) surface is expected to play a key role in preventing bacterial infection. PURPOSE: In the present study a new antimicrobial polysiloxane coating functionalized with chlorexidine digluconate (PXT) has been tested in an in vitro model...
January 2017: Oral & Implantology
https://www.readbyqxmd.com/read/28757795/a-new-model-to-study-fatigue-in-dental-implants-based-on-probabilistic-finite-elements-and-cumulative-damage-model
#16
María Prados-Privado, José Antonio Bea, Rosa Rojo, Sérgio A Gehrke, José Luis Calvo-Guirado, Juan Carlos Prados-Frutos
The aim of this study was to predict the fatigue life of two different connections of a dental implant as in load transfer to bone. Two three-dimensional models were created and assembled. All models were subjected to a natural masticatory force of 118 N in the angle of 75° to the occlusal plane. All degrees of freedom in the inferior border of the cortical bone were restrained, and the mesial and distal borders of the end of the bone section were constrained. Fatigue material data and loads were assumed as random variables...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28742164/relationship-between-implant-stability-on-the-abutment-and-platform-level-by-means-of-resonance-frequency-analysis-a-cross-sectional-study
#17
Frederico Santos Lages, Dhelfeson Willya Douglas-de-Oliveira, Guilherme Siqueira Ibelli, Fatimah Assaf, Thallita Pereira Queiroz, Fernando Oliveira Costa
Resonance frequency analysis (RFA) has become the main tool used to assess the osseointegration of dental implants. The objective of this study was to verify the relationship between the ISQ values with different prosthetic abutments and with the implant platform. The hypothesis was that ISQ values changes according to the abutment height. Twelve patients were included, whose contribution to the study was 31 dental implants (external hexagon connection implants, 4.1x10 mm). The temporary implant-supported crown and prosthetic components were removed and the following smartpegs were inserted, one at a time: type 1, in the implant platform (G1); type A3, in the microunit component with 1mm transmucosal height (G2) and type A3, in the microunit component with 5mm transmucosal height (G3)...
2017: PloS One
https://www.readbyqxmd.com/read/28736922/effect-of-implantoplasty-on-fracture-resistance-and-surface-roughness-of-standard-diameter-dental-implants
#18
Xavier Costa-Berenguer, Marta García-García, Alba Sánchez-Torres, Mariano Sanz-Alonso, Rui Figueiredo, Eduard Valmaseda-Castellón
OBJECTIVE: To assess the effect of implantoplasty on the fracture resistance, surface roughness, and macroscopic morphology of standard diameter (4.1 mm) external connection dental implants. MATERIALS AND METHODS: An in vitro study was conducted in 20 screw-shaped titanium dental implants with an external connection. In 10 implants, the threads and surface were removed and polished with high-speed burs (implantoplasty), while the remaining 10 implants were used as controls...
July 23, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28734346/hap-nanoparticle-and-substrate-surface-electrical-potential-towards-bone-cells-adhesion-recent-results-review
#19
REVIEW
Vladimir Bystrov, Anna Bystrova, Yuri Dekhtyar
Nanostructured hydroxyapatite (HAP) and its nanoparticles are widely used for implantation into the human organism. The biocompatibility of the implants depends very much on the interaction between the implant and the cells regenerating tissue to be connected to the implant. An implant surface electrical charged density plays an important role in these processes. Possible instruments managing the surface electrical potential of HAP are in the focus of this paper. Both theoretical and experimental results evidence that: - the surface electrical charge density of the nanoparticle depends on its size and shape; - the electrical charge density of HAP could be engineered by contact less technique because of deposition of the electrical charge from the external radiation source, surface couples reconstruction...
May 3, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28713235/connecting-the-brain-to-itself-through-an-emulation
#20
Mijail D Serruya
Pilot clinical trials of human patients implanted with devices that can chronically record and stimulate ensembles of hundreds to thousands of individual neurons offer the possibility of expanding the substrate of cognition. Parallel trains of firing rate activity can be delivered in real-time to an array of intermediate external modules that in turn can trigger parallel trains of stimulation back into the brain. These modules may be built in software, VLSI firmware, or biological tissue as in vitro culture preparations or in vivo ectopic construct organoids...
2017: Frontiers in Neuroscience
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