scholarly journals Optimizing a micro-computed tomography-based surrogate measurement of bone-implant contact

2017 ◽  
Author(s):  
Matthew J. Meagher ◽  
Rachna N. Parwani ◽  
Amarjit S. Virdi ◽  
Dale R. Sumner
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
Bone Implant ◽  
Bone Implant Contact ◽  
Surrogate Measurement

scholarly journals Limitations of using micro-computed tomography to predict bone-implant contact and mechanical fixation

2011 ◽  
Vol 245 (1) ◽  
pp. 34-42 ◽  
Author(s):  
S. LIU ◽  
J. BROUCEK ◽  
A. S. VIRDI ◽  
D. R. SUMNER
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
Bone Implant ◽  
Bone Implant Contact

Comparison of micro-computed tomography and histomorphometry in the measurement of bone–implant contact ratios

2019 ◽  
Vol 128 (1) ◽  
pp. 87-95 ◽  
Author(s):  
Jung-Yoo Choi ◽  
Jae-Il Park ◽  
Ji Soo Chae ◽  
In-Sung Luke Yeo
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
Bone Implant ◽  
Bone Implant Contact

scholarly journals Volumetric quantification of bone-implant contact using micro-computed tomography analysis based on region-based segmentation

2015 ◽  
Vol 45 (1) ◽  
pp. 7 ◽  
Author(s):  
Sung-Won Kang ◽  
Woo-Jin Lee ◽  
Soon-Chul Choi ◽  
Sam-Sun Lee ◽  
Min-Suk Heo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
Bone Implant ◽  
Bone Implant Contact ◽  
Volumetric Quantification ◽  
Tomography Analysis

scholarly journals Degradation and Biocompatibility of AZ31 Magnesium Alloy Implants In Vitro and In Vivo: A Micro-Computed Tomography Study in Rats

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 473 ◽  
Author(s):  
Naohiko Kawamura ◽  
Yuya Nakao ◽  
Rina Ishikawa ◽  
Dai Tsuchida ◽  
Masahiro Iijima
Keyword(s):  
Computed Tomography ◽  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Mg Alloy ◽  
Nanoindentation Test ◽  
Mechanical Degradation ◽  
Micro Computed Tomography ◽  
Bone Implant ◽  
Az31 Mg Alloy ◽  
Degradation Rates

In current orthodontic practice, miniscrew implants (MSIs) for anchorage and bone fixation plates (BFPs) for surgical orthodontic treatment are commonly used. MSIs and BFPs that are made of bioabsorbable material would avoid the need for removal surgery. We investigated the mechanical, degradation and osseointegration properties and the bone-implant interface strength of the AZ31 bioabsorbable magnesium alloy to assess its suitability for MSIs and BFPs. The mechanical properties of a Ti alloy (TiA), AZ31 Mg alloy (MgA), pure Mg and poly-L-lactic acid (PLA) were investigated using a nanoindentation test. Also, pH changes in the solution and degradation rates were determined using immersion tests. Three-dimensional, high-resolution, micro-computed tomography (CT) of implants in the rat femur was performed. Biomechanical push-out testing was conducted to calculate the maximum shear strength of the bone-implant interface. Scanning electron microscopy (SEM), histological analysis and an evaluation of systemic inflammation were performed. MgA has mechanical properties similar to those of bone, and is suitable for implants. The degradation rate of MgA was significantly lower than that of Mg. MgA achieved a significantly higher bone-implant bond strength than TiA. Micro-CT revealed no significant differences in bone density or bone-implant contact between TiA and MgA. In conclusion, the AZ31 Mg alloy is suitable for both MSIs and BFPs.

Identification of Fibrotic Thickening as Early Marker of Aortic Valve Stenosis Using X-Ray Micro Computed Tomography and Optical Coherence Tomography

2016 ◽  
Vol 64 (S 01) ◽  
Author(s):  
A. Jannasch ◽  
C. Schnabel ◽  
M. Santini ◽  
S. Fest-Santini ◽  
M. Lorenzi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Optical Coherence Tomography ◽  
Aortic Valve ◽  
Aortic Valve Stenosis ◽  
Optical Coherence ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Early Marker

Cortical and trabecular bone parameters from HR-Pqct images at the Tibia: a local comparison with synchrotron radiation micro-computed tomography

2013 ◽  
Author(s):  
Agnes Ostertag ◽  
Francoise Peyrin ◽  
Sylvie Fernandez ◽  
Jean-Denis Laredo ◽  
Vernejoul Marie-Christine De ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Synchrotron Radiation ◽  
Trabecular Bone ◽  
Micro Computed Tomography ◽  
Bone Parameters ◽  
Local Comparison

Morphology and Affinities of Ampelocissites Seeds (Vitaceae: Ampelopsis clade) from the Paleogene of Texas, USA

2020 ◽  
Vol 45 (3) ◽  
pp. 478-482
Author(s):  
Steven R. Manchester
Keyword(s):  
Computed Tomography ◽  
Cross Sections ◽  
Seed Coat ◽  
Ct Scanning ◽  
Seed Morphology ◽  
Early Eocene ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Fossil Seeds ◽  
Fossil Genus

Abstract—The type material on which the fossil genus name Ampelocissites was established in 1929 has been reexamined with the aid of X-ray micro-computed tomography (μ-CT) scanning and compared with seeds of extant taxa to assess the relationships of these fossils within the grape family, Vitaceae. The specimens were collected from a sandstone of late Paleocene or early Eocene age. Although originally inferred by Berry to be intermediate in morphology between Ampelocissus and Vitis, the newly revealed details of seed morphology indicate that these seeds represent instead the Ampelopsis clade. Digital cross sections show that the seed coat maintains its thickness over the external surfaces, but diminishes quickly in the ventral infolds. This feature, along with the elliptical chalaza and lack of an apical groove, indicate that Ampelocissites lytlensis Berry probably represents Ampelopsis or Nekemias (rather than Ampelocissus or Vitis) and that the generic name Ampelocissites may be useful for fossil seeds with morphology consistent with the Ampelopsis clade that lack sufficient characters to specify placement within one of these extant genera.

INVESTIGATION OF AUBRITES THROUGH INTEGRATION OF 3D MODAL MINERALOGY WITH X-RAY MICRO-COMPUTED TOMOGRAPHY AND GEOCHEMISTRY

2018 ◽  
Author(s):  
Zoë E. Wilbur ◽  
◽  
Arya Udry ◽  
Arya Udry ◽  
Daniel M. Coleff ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
X Ray
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