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Titanium 3d

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https://www.readbyqxmd.com/read/29668300/magnitude-of-cone-beam-computed-tomography-image-artifacts-related-to-zirconium-and-titanium-implants-impact-on-image-quality
#1
Rocharles C Fontenele, Eduarda Hl Nascimento, Taruska V Vasconcelos, Marcel Noujeim, Deborah Q Freitas
OBJECTIVES: To evaluate the magnitude of artifacts related to titanium and zirconium implants at different distances and angulations and their impact on cone beam computed tomography (CBCT) image quality. METHODS: CBCT images were obtained before and after the insertion of titanium and zirconium implants in a mandible on different CBCT units: Picasso Trio, ProMax 3D and 3D Accuitomo 80. Artefact was assessed by measuring the standard deviation of gray values (SD) and contrast-to-noise ratio (CNR) of 11 regions of interest (ROI) at different distances (1...
April 18, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29648876/use-of-patient-specific-3d-printed-titanium-implants-for-complex-foot-and-ankle-limb-salvage-deformity-correction-and-arthrodesis-procedures
#2
Travis J Dekker, John R Steele, Andrew E Federer, Kamran S Hamid, Samuel B Adams
BACKGROUND: The advancement of 3D printing technology has allowed for the use of custom-designed implants for difficult-to-treat foot and ankle pathologies. This study reports on the radiographic and functional outcomes of a case series of patients treated with patient-specific 3D-printed titanium implants. METHODS: Fifteen consecutive patients treated with custom-designed 3D-printed implant cages for severe bone loss, deformity correction, and/or arthrodesis procedures were included in this study...
April 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29621176/functionalized-thick-film-impedance-sensors-for-use-in-in-vitro-cell-culture
#3
Heike Bartsch, Martin Baca, Uta Fernekorn, Jens Müller, Andreas Schober, Hartmut Witte
Multi-electrode arrays find application in electrophysiological recordings. The quality of the captured signals depends on the interfacial contact between electrogenic cells and the electronic system. Therefore, it requires reliable low-impedance electrodes. Low-temperature cofired ceramic technology offers a suitable platform for rapid prototyping of biological reactors and can provide both stable fluid supply and integrated bio-hardware interfaces for recordings in electrogenic cell cultures. The 3D assembly of thick film gold electrodes in in vitro bio-reactors has been demonstrated for neuronal recordings...
April 5, 2018: Biosensors
https://www.readbyqxmd.com/read/29567567/molecularly-imprinted-sensor-based-on-russian-matryoshka-structured-molecules-for-enhanced-specific-identification-and-double-amplification-in-ultra-trace-tb-3-determination
#4
Jianping Li, Bin Yang, Hongcheng Pan, Guobao Xu
The selective and sensitive detection of rare earth elements is thought to be difficult because the concentration of those elements in the sample is commonly at a low level and they normally have severe mutual interference which is caused by homologous chemical properties. In this study, a novel molecularly imprinted polymer (MIP) sensor was fabricated for highly sensitive and selective determination of ultra-trace Tb3+ . The Tb3+ -ethylenediaminetetraacetic acid complex (Tb-EDTA) as the template molecule was incorporated into mono-6-mercapto-β-cyclodextrin (mono-6-SH-β-CD) to form a Russian Matryoshka (RM)-structured molecule (CD/Tb-EDTA)...
March 14, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29561142/intermediate-band-material-of-titanium-doped-tin-disulfide-for-wide-spectrum-solar-absorption
#5
Keyan Hu, Dong Wang, Wei Zhao, Yuhao Gu, Kejun Bu, Jie Pan, Peng Qin, Xian Zhang, Fuqiang Huang
Intermediate band (IB) materials are of great significance due to their superior solar absorption properties. Here, two IBs peaking at 0.88 and 1.33 eV are reported to be present in the forbidden gap of semiconducting SnS2 ( Eg = 2.21 eV) by doping titanium up to 6 atom % into the Sn site via a solid-state reaction at 923 K. The solid solution of Sn1- x Tix S2 is able to be formed, which is attributed to the isostructural structure of SnS2 and TiS2 . These two IBs were detected in the UV-vis-NIR absorption spectra with the appearance of two additional absorption responses at the respective regions, which in good agreement with the conclusion of first-principles calculations...
March 21, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29548880/the-advantages-of-advanced-computer-assisted-diagnostics-and-three-dimensional-preoperative-planning-on-implant-position-in-orbital-reconstruction
#6
Jesper Jansen, Ruud Schreurs, Leander Dubois, Thomas J J Maal, Peter J J Gooris, Alfred G Becking
OBJECTIVE: Advanced three-dimensional (3D) diagnostics and preoperative planning are the first steps in computer-assisted surgery (CAS). They are an integral part of the workflow, and allow the surgeon to adequately assess the fracture and to perform virtual surgery to find the optimal implant position. The goal of this study was to evaluate the accuracy and predictability of 3D diagnostics and preoperative virtual planning without intraoperative navigation in orbital reconstruction. METHODS: In 10 cadaveric heads, 19 complex orbital fractures were created...
February 26, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29526301/digital-design-of-patient-specific-abutments-for-the-retention-of-implant-retained-facial-prostheses
#7
Carolyn Kincade, Lindsay McHutchion, Johan Wolfaardt
The present report describes the digital design of patient-specific milled abutments for the retention of osseointegrated facial prostheses by using digital technology. Patient imaging including surface scans of the patient's head, scans of the patient's definitive cast, and digitally designed prosthesis prototypes were combined to create a digital simulation of the patient. Using this simulation, patient-specific abutments were digitally designed, printed in 3-dimensions (3D), and finally copy-milled in titanium...
March 8, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29511441/a-novel-hybrid-3d-printed-titanium-scaffold-for-osteogenesis-in-a-rabbit-calvarial-defect-model
#8
Bo Yin, Bingjian Xue, Zhihong Wu, Jiguang Ma, Keming Wang
The aim of this study was to explore an innovative method to improve the osteogenic ability of porous titanium. We used gelatin (Gel) and nano-hydroxyapatite (nHA) to construct micro-scaffolds within the pores of porous titanium alloy. We compared three groups: control, Gel:nHA = 1:0, and Gel:nHA = 1:1. We assessed cell attachment, cell proliferation, and osteogenic (alkaline phosphatase [ALP] and collagen type 1 [Col-1]) and cytoskeletal (Talin) gene and protein expression in MC3T3-E1 cells. We also evaluated osteogenic abilities in a rabbit calvarial defect model...
2018: American Journal of Translational Research
https://www.readbyqxmd.com/read/29503994/probing-the-impact-of-magnetic-interactions-on-the-lattice-dynamics-of-two-dimensional-ti-2-x-x-c-n-mxenes
#9
Małgorzata Sternik, Urszula D Wdowik
Dynamical properties of the two-dimensional Ti2 C and Ti2 N MXenes were investigated using density functional theory and discussed in connection with their structures and electronic properties. To elucidate the influence of magnetic interactions on the fundamental properties of these systems, the nonmagnetic, ferromagnetic and three distinct antiferromagnetic spin arrangements on titanium sublattice were considered. Each magnetic configuration was also studied at two directions of the spin magnetic moment with respect to the MXene layer...
March 5, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29503709/accuracy-and-reproducibility-of-3d-digital-tooth-preparations-made-by-gypsum-materials-of-various-colors
#10
Fa-Bing Tan, Chao Wang, Hong-Wei Dai, Yu-Bo Fan, Jin-Lin Song
PURPOSE: The study aimed to identify the accuracy and reproducibility of preparations made by gypsum materials of various colors using quantitative and semi-quantitative three-dimensional (3D) approach. MATERIALS AND METHODS: A titanium maxillary first molar preparation was created as reference dataset (REF). Silicone impressions were duplicated from REF and randomized into 6 groups (n=8). Gypsum preparations were formed and grouped according to the color of gypsum materials, and light-scanned to obtain prepared datasets (PRE)...
February 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29498903/using-virtual-ridge-augmentation-and-3d-printing-to-fabricate-a-titanium-mesh-positioning-device-a-novel-technique-letter
#11
Aladdin Al-Ardah, Nasser Alqahtani, Abdulaziz AlHelal, Brian Goodacre, Rajesh Swamidass, Antoanela Garbacea, Jaime Lozada
This technique describes a novel approach for planning and augmenting a large bony defect using a titanium mesh (TiMe). A 3-dimensional (3D) surgical model was virtually created from a cone beam computed tomography (CBCT) and wax-pattern of the final prosthetic outcome. The required bone volume (horizontally and vertically) was digitally augmented and then 3D printed to create a bone model. The 3D model was then used to contour the TiMe in accordance with the digital augmentation. With the contoured / preformed TiMe on the 3D printed model a positioning jig was made to aid the placement of the TiMe as planned during surgery...
March 2, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29497852/pedicle-screw-anchorage-of-carbon-fiber-reinforced-peek-screws-under-cyclic-loading
#12
Richard A Lindtner, Rene Schmid, Thomas Nydegger, Marko Konschake, Werner Schmoelz
PURPOSE: Pedicle screw loosening is a common and significant complication after posterior spinal instrumentation, particularly in osteoporosis. Radiolucent carbon fiber-reinforced polyetheretherketone (CF/PEEK) pedicle screws have been developed recently to overcome drawbacks of conventional metallic screws, such as metal-induced imaging artifacts and interference with postoperative radiotherapy. Beyond radiolucency, CF/PEEK may also be advantageous over standard titanium in terms of pedicle screw loosening due to its unique material properties...
March 1, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29496624/bony-ingrowth-potential-of-3d-printed-porous-titanium-alloy-a-direct-comparison-of-interbody-cage-materials-in-an-in-vivo-ovine-lumbar-fusion-model
#13
Kirk McGilvray, Jeremiah Easley, Howard B Seim, Daniel Regan, Sigurd H Berven, Wellington K Hsu, Thomas E Mroz, Christian M Puttlitz
BACKGROUND CONTEXT: There is significant variability in the materials commonly used for interbody cages in spine surgery. It is theorized that 3-D printed interbody cages utilizing porous titanium material can provide more consistent bone ingrowth and biological fixation. PURPOSE: The purpose of this study was to provide an evidence-based approach to decision making regarding interbody materials for spinal fusion. STUDY DESIGN: Comparative animal study...
February 26, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29486449/in-vitro-characterization-of-3d-printed-scaffolds-aimed-at-bone-tissue-regeneration
#14
João C Boga, Sónia P Miguel, Duarte de Melo-Diogo, António G Mendonça, Ricardo O Louro, Ilídio J Correia
The incidence of fractures and bone-related diseases like osteoporosis has been increasing due to aging of the world's population. Up to now, grafts and titanium implants have been the principal therapeutic approaches used for bone repair/regeneration. However, these types of treatment have several shortcomings, like limited availability, risk of donor-to-recipient infection and tissue morbidity. To overcome these handicaps, new 3D templates, capable of replicating the features of the native tissue, are currently being developed by researchers from the area of tissue engineering...
February 21, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29481497/single-piece-titanium-plate-cranioplasty-reconstruction-of-complex-defects
#15
Joseph Luo, David Anthony Morrison, Alex John Hayes, Arul Bala, Guy Watts
BACKGROUND: Different methods have been described for the reconstruction of cranial defects and orbital defects. The complex contouring between the orbital roof and frontal bone creates significant design challenges for prefabricated cranio-orbital reconstructions. In describing the first reported patient of combined skull and orbital roof reconstruction with a single-piece titanium plate cranioplasty, the authors present a new method of combined complex cranio-orbital reconstruction...
February 23, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29481493/contour-restoration-of-over-resected-mandibular-angle-and-lower-border-by-reduction-mandibuloplasty-using-three-dimensional-planning-and-computer-aided-design-and-manufacturing-custom-made-titanium-implants
#16
Jae Man Woo, Seung-Hak Baek, Jong-Cheol Kim, Jin-Young Choi
OBJECTIVE: The purpose of this clinical report was to introduce a new methodology for contour restoration of the over-resected mandible by reduction mandibuloplasty using 3-dimensional (3D) planning and computer-assisted design and manufacturing (CAD-CAM) custom-made titanium implants. PATIENT AND METHOD: A 20-year-old male patient had undergone reduction of the zygoma and mandibular angle and lower border for esthetic reason 1 year ago at a private clinic. However, he was not satisfied with surgical outcome and wanted to restore his original facial volume and contour...
February 23, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29475755/marginal-discrepancy-of-cad-cam-complete-arch-fixed-implant-supported-frameworks
#17
Burak Yilmaz, Ediz Kale, William M Johnston
STATEMENT OF PROBLEM: Computer-aided design and computer-aided manufacturing (CAD-CAM) high-density polymers (HDPs) have recently been marketed for the fabrication of long-term interim implant-supported fixed prostheses. However, information regarding the precision of fit of CAD-CAM HDP implant-supported complete-arch screw-retained prostheses is scarce. PURPOSE: The purpose of this in vitro study was to evaluate the marginal discrepancy of CAD-CAM HDP complete-arch implant-supported screw-retained fixed prosthesis frameworks and compare them with conventional titanium (Ti) and zirconia (Zir) frameworks...
February 21, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29471230/variations-of-floc-morphology-and-extracellular-organic-matters-eom-in-relation-to-floc-filterability-under-algae-flocculation-harvesting-using-polymeric-titanium-coagulants-ptcs
#18
Weijun Zhang, Rongna Song, Bingdi Cao, Xiaofang Yang, Dongsheng Wang, Xingmin Fu, Yao Song
The work evaluated the algae cells removal efficiency using titanium salt coagulants with different degree of polymerization (PTCs), and the algae cells aggregates and extracellular organic matter (EOM) under chemical flocculation were investigated. The results indicated that PTCs performed well in algae cells flocculation and separation. The main mechanism using PTCs of low alkalisation degree for algae flocculation was associated with charge neutralization, while adsorption bridging and sweep flocculation was mainly responsible for algae removal by PTCs of high alkalisation degree treatment...
February 10, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29464946/uptake-of-tio2-nanoparticles-into-c-elegans-neurons-negatively-affects-axonal-growth-and-worm-locomotion-behavior
#19
Chun-Chih Hu, Gong-Her Wu, Tzu-En Hua, Oliver I Wagner, Ta-Jen Yen
We employ the model organism Caenorhabditis elegans to effectively study the toxicology of anatase and rutile phase titanium dioxide (TiO2) nanoparticles (NPs). The experimental results show that the nematode C. elegans can take up fluorescein isothiocyanate (FITC)-labeled TiO2 NPs and that both anatase and rutile TiO2 NPs can be detected in the cytoplasm of cultured primary neurons imaged by transmission electron microscopy (TEM). After TiO2 NPs exposure, these neurons also grow shorter axons, which may be related to the detected impeded worm locomotion behavior...
February 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29464784/total-nasal-reconstruction-with-3d-custom-made-porous-titanium-prosthesis-and-free-thoracodorsal-artery-perforator-flap-a-case-report
#20
Quentin Qassemyar, Nathaniel Assouly, Yoni Madar, Stéphane Temam, Frédéric Kolb
Total nasal reconstruction is a challenging surgical procedure which usually involves a free flap, forehead flap, and cartilage grafts. In certain failure situations where patients do not accept the idea of anaplastology, possibilities become very limited. We report the case of a patient who underwent several reconstruction steps with multiple failures including free and local flaps and cartilage harvests which showed recurrent episodes of necrosis and infection leading to melting and collapse of reconstructed structures...
February 21, 2018: Microsurgery
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