tantalum/dental caries

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[Roentgenography of tumor resection cavities with tantalum powder for directed postoperative radioactive isotope irradiation].

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[Indirect lymphography of the mediastinum and of the upper abdominal cavity in rabbits by means of tantalum oxide and tantalum carbide dust].

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On the interaction of acetone with electrophilic metallocavitands having extended cavities.

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We report the synthesis and characterization of tantalum-boronate trimetallic clusters of general formula {[Cp*Ta](3)(μ(2)-RB(O)(2))(3)(μ(2)-OH)(μ(2)-O)(2)(μ(3)-OH)} (R= 4-(C(6)H(5))(C(6)H(4)) (Ta(3)-4Ph), 4-(C(6)H(5)O)(C(6)H(4)) (Ta(3)-4OPh), 4-(C(7)H(7)O)(C(6)H(4)) (Ta(3)-4OBn),

Waveguide lasers in ytterbium-doped tantalum pentoxide on silicon.

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A waveguide laser in an ytterbium-doped tantalum pentoxide film is reported. The waveguide is formed of a rib of sputtered tantalum pentoxide on top of oxidized silicon with an over-cladding of silica. Emission at a wavelength of 1025 nm was achieved with an absorbed pump power threshold and slope

Effect of a porous tantalum rod on early and intermediate stages of necrosis of the femoral head.

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The aim of this study was to evaluate the effect of a porous tantalum rod implant for the treatment of early femoral head necrosis. From April 2007 to June 2009, a total of 35 femoral head necrosis patients (with 49 hips) were treated with core decompression in combination with the insertion of a

Dynamics of the hysteretic voltage-induced torsional strain in tantalum trisulfide.

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We have studied how the hysteretic voltage-induced torsional strain, associated with charge-density-wave (CDW) depinning, in orthorhombic tantalum trisulfide depends on square-wave and triangle-wave voltages of different frequencies and amplitudes. The strains are measured by placing the sample,

[Blow out fracture of the medial orbital wall--plastic repair with tantalum mesh].

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Two cases of blow out fracture of the medial orbital wall were reported. The one was a 14 year-old boy and the other was a 32 year-old man. After hitting the eye against another man or a hard object, the patients felt diplopia, especially on lateral gaze toward the injured side. The blow out

Comparing Initial Wound Healing and Osteogenesis of Porous Tantalum Trabecular Metal and Titanium Alloy Materials.

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Porous tantalum trabecular metal (PTTM) has long been used in orthopedics to enhance neovascularization, wound healing, and osteogenesis; recently, it has been incorporated into titanium alloy dental implants. However, little is known about the biological responses to PTTM in the human oral cavity.

A Retrospective Survival Study of Trabecular Tantalum Implants Immediately Placed in Posterior Extraction Sockets Using a Flapless Technique.

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A retrospective review of patient records was conducted in a single private practice to evaluate the efficacy of immediately placing a novel implant design in posterior jaw locations using a flapless technique. Forty-two patients (22 males, 20 females) with a mean (SD) age of 60.2 (7.6) years (range

Synthesis, crystal structures, and optical properties of two new layered quaternary tantalum thiophosphates and the thermal conversion of Cs4Ta4P4S24 into Cs2Ta2P2S12.

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The reaction of Ta with an in situ formed polythiophosphate melt of Cs2S3, P2S5, and S yields the two new quaternary tantalum thiophosphates Cs2Ta2P2S12 (I) and Cs4Ta4P4S24 (II). Both compounds were obtained with the same stoichiometric ratio but at different reaction temperatures. Compound I was

Porous tantalum trabecular metal scaffolds in combination with a novel marrow processing technique to replace autograft.

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BACKGROUND Interbody fusion requires a structural member to carry load while the autograft or osteoinductive agent stimulates bone formation. In the present study, we evaluated the potential use of extracted nucleated cells from bone marrow mixed in hyaluronic acid gel as an osteoinductive agent, in

Reduction of CT beam hardening artefacts of ethylene vinyl alcohol copolymer by variation of the tantalum content: evaluation in a standardized aortic endoleak phantom.

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OBJECTIVE Our aim was to develop an aortic stent graft phantom to simulate endoleak treatment and to find a tantalum content (TC) of ethylene-vinyl-alcohol-copolymer that causes fewer computed tomography (CT) beam hardening artefacts, but still allows for fluoroscopic

What's Happening on the Other Side? Revealing Nano-Meter Scale Features of Mammalian Cells on Engineered Textured Tantalum Surfaces.

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Advanced engineered surfaces can be used to direct cell behavior. These behaviors are typically characterized using either optical, atomic force, confocal, or electron microscopy; however, most microscopic techniques are generally restricted to observing what's happening on the "top" side

Spectral Control of an X-Ray L-Edge Transition via a Thin-Film Cavity.

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By embedding a thin layer of tantalum in an x-ray cavity, we observe a change in the spectral characteristics of an inner-shell transition of the metal. The interaction between the cavity mode vacuum and the L_{III}-edge transition is enhanced, permitting the observation of the collective Lamb

Failure of porous tantalum cervical interbody fusion devices: two-year results from a prospective, randomized, multicenter clinical study.

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OBJECTIVE The objective of this study was to assess the safety and efficacy of 2 novel cervical interbody fusion devices in the treatment of single-level degenerative cervical disk disease. Both devices were fabricated from a porous tantalum material. The high overall porosity of the devices was

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