Computer tomographic analysis of anatomic characteristics of the ulna – essential parameters for preshaped implants

The aim of this article is to present a new type of testing device used for computer tomographic analysis of the structure of a microfiber fabric and a porous artificial leather under deformation. The load exerted by an occupant sitting motionless on a vehicle seat is to be analyzed. The load is determined on complete seats with test persons (no dummies) carrying out the tests. The result is the specification of a pressure range over the test group of people that is valid for both materials. In the next step, the load condition is adapted to a 1:1 substitute test model and finally to a test device for computer tomography. The description and validation of the load conditions are carried out by finite element simulation, and a comparison with the measurement series is carried out. In summary, it can be stated that the developed loading device represents a good representation of reality. This includes the boundary conditions assumed for the design, the inaccuracies of the finite element simulation, and the measurement systems. The analysis of the structural properties of a reference surface is possible with a resolution of 5 µm.

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Laser Versus Ultrasound on Bone Density Recuperation After Distraction Osteogenesis—A Cone-Beam Computer Tomographic Analysis

Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.joms.2012.11.010 ◽

2013 ◽

Vol 71 (5) ◽

pp. 921-928 ◽

Cited By ~ 8

Author(s):

Leonard Euler Andrade Gomes do Nascimento ◽

Eduardo Franzotti Sant'Anna ◽

Antônio Carlos de Oliveira Ruellas ◽

Lincoln Issamu Nojima ◽

Antônio Cruz Gonçalves Filho ◽

...

Keyword(s):

Bone Density ◽

Distraction Osteogenesis ◽

Cone Beam ◽

Computer Tomographic ◽

Tomographic Analysis

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Assessment of the Dynamism of the Left Atrial Appendage Dimensions: A Computer Tomographic Analysis

Journal of Structural Heart Disease ◽

10.12945/j.jshd.2019.035.18 ◽

2019 ◽

Vol 5 (5) ◽

pp. 213-220

Author(s):

Mohamed Marwan ◽

Amina Vaillant ◽

Fabian Ammon ◽

Daniel Bittner ◽

Michaela Hell ◽

...

Keyword(s):

Left Atrial ◽

Left Atrial Appendage ◽

Atrial Appendage ◽

Computer Tomographic ◽

Tomographic Analysis

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Computer tomographic analysis of undisturbed samples of loose sands

Canadian Geotechnical Journal ◽

10.1139/t01-016 ◽

2001 ◽

Vol 38 (4) ◽

pp. 770-781 ◽

Cited By ~ 10

Author(s):

Norbert Pralle ◽

Malte L Bahner ◽

Josef Benkler

Keyword(s):

Ground Level ◽

Density Fluctuations ◽

Public Access ◽

Soil Freezing ◽

Degree Of Saturation ◽

Computer Tomographic ◽

Undisturbed Samples ◽

Low Degree ◽

Below Ground ◽

Tomographic Analysis

Spontaneous flows of very loose sand deposits pose a serious environmental problem in abandoned lignite mines. Large areas in eastern Germany are not safe for public access. Slight disturbances have triggered large settlement flows, causing loss of lives and structures. To better understand the mechanisms of fast settlement flows, undisturbed samples from depths between 10 and 15 m below ground level were retrieved using the soil-freezing method. Conventional laboratory and computer tomographic soil analyses were performed on these samples. The results reveal a very low degree of saturation and large gas-filled macropores responsible for considerable density fluctuations within the phreatic zone. These spatial porosity variations are thought to strongly contribute to the collapsibility of loose sands.Key words: spontaneous liquefaction, undisturbed sampling, soil freezing, computer tomography, density fluctuations, gas inclusions.

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