Purpose: The aim of this study was to compare the osseointegration percentage of biomimetic hydroxyapatite (HA)-coated implants on longitudinal and transverse histologic sections using scanning electron microscopy.
Materials And Methods: Ten commercially pure titanium dental implants, measuring 3.75 mm in diameter and 10 mm in length, were coated with HA by the biomimetic process and installed on the proximal metaphysis of the right tibia of 10 adult New Zealand female rabbits (Oryctolagus cunniculus). After a 3-month healing period, the animals were killed and the implants were removed together with the neighboring bone tissue. The specimens were than dehydrated on a crescent concentration of ethanol solution and embedded on resin. The osseointegration percentage of biomimetic HA-coated implants on 1 longitudinal and 1 transverse section were compared, using scanning electron microscopy and computerized histomorphometry.
Results: It was verified that there were no statistically significant differences between the results of the different histological section directions (P > 0.05).
Conclusion: Thus, in this study, the direction of histological sections did not affect bone-implant percentage.
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http://dx.doi.org/10.1097/ID.0b013e3181cc4c3f | DOI Listing |
J Phys Chem Lett
January 2025
Institute of Bioproducts and Paper Technology, Graz University of Technologyy, Inffeldgasse 23, 8010 Graz, Austria.
The mechanical properties of metal-organic frameworks (MOFs) are of high fundamental and practical relevance. A particularly intriguing technique for determining anisotropic elastic tensors is Brillouin scattering, which so far has rarely been used for highly complex materials like MOFs. In the present contribution, we apply this technique to study a newly synthesized MOF-type material, referred to as GUT2.
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January 2025
Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310007, China.
The hygrothermal aging model, based on Fick's second law of diffusion, characterizes the degradation of engineering constants in T700 carbon fiber/epoxy resin composites. It focuses on changes in the tensile modulus, shear modulus, and transverse Poisson's ratio due to moisture absorption and temperature variations. The model validates through mass change observations before and after seawater immersion, along with surface morphology assessments and tensile experiments.
View Article and Find Full Text PDFMaterials (Basel)
January 2025
3D Printing Research and Engineering Technology Center, Beijing Institute of Aeronautical Materials, Beijing 100095, China.
This work investigated the CrNiMo stainless steel using laser selective melting (SLM) technology and explored the effect of the tempering temperature on the microstructure and properties. After the tempering treatment, the quenched martensite transformed from a metastable to steady state, and residual austenite was formed. The results indicated that the elongation of the transverse specimen showed an upward trend as the tempering temperature increased, while the elongation of the longitudinal specimen first increased and then decreased.
View Article and Find Full Text PDFMicromachines (Basel)
December 2024
International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal.
The development of low-temperature piezoresistive materials provides compatibility with standard silicon-based MEMS fabrication processes. Additionally, it enables the use of such material in flexible substrates, thereby expanding the potential for various device applications. This work demonstrates, for the first time, the fabrication of a 200 nm polycrystalline silicon thin film through a metal-induced crystallization process mediated by an AlSiCu alloy at temperatures as low as 450 °C on top of silicon and polyimide (PI) substrates.
View Article and Find Full Text PDFBiomedicines
January 2025
Embrapa Genetic Resources and Biotechnology, Laboratory of Nanobiotechnology (LNANO), Brasília 70770-917, DF, Brazil.
Machine learning is used to analyze images by training algorithms on data to recognize patterns and identify objects, with applications in various fields, such as medicine, security, and automation. Meanwhile, histological cross-sections, whether longitudinal or transverse, expose layers of tissues or tissue mimetics, which provide crucial information for microscopic analysis. : This study aimed to employ the Google platform "Teachable Machine" to apply artificial intelligence (AI) in the interpretation of histological cross-section images of hydrogel filaments.
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