In the last few decades, casting metal has been the most commonly used post-core systems. But the elastic modulus of metal posts is higher than that of the dentin. Root fractures often happen because of the higher elastic modulus. The fiber posts can reduce or avoid root fractures because their elastic modulus is similar to that of the dentin. Therefore, they are widely used clinically to preserve tooth tissues and restore them after failure. This review article aims to introduce the recent research of the fiber posts.
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Motion analysis of and experimental research on a magnetic and elastic coupling oscillation system.
Heliyon
July 2024
School of Physics, Changchun University of Science and Technology, Changchun, 130022, China.
To analyze the motion laws of a magnetic and elastic coupling system under the influence of various factors, this paper proposes a magnetic coupling pendulum based on spring pieces and magnets-a magnetic-mechanical oscillator. By fixing spring pieces onto two non-magnetic bases and attaching magnets to their upper ends, which repel each other, the potential energy during oscillation is expanded using Fourier series. Subsequently, Lagrange equations are solved to study the effects of the first two terms of potential energy.
View Article and Find Full Text PDFEvaluation of phenolic compounds as cross-linkers to improve the qualities of halal gelatin from milkfish scales ().
Narra J
December 2024
Department of Pharmacochemistry, School of Pharmacy, Institut Teknologi Bandung, Bandung, Indonesia.
Gelatin is a versatile substance extensively used in medical and pharmaceutical industries for many applications, including capsule shells, X-ray film, infusion for plasma substitute, and the fabricating of artificial tissue. Fish scale gelatin is a profitable alternative source as a halal material despite its inferior quality. An addition of phenolic cross-linker may enhance the qualities of fish scale gelatin.
View Article and Find Full Text PDFIn vivo assessment of regional scleral stiffness by shear wave elastography and its association with choroid and retinal nerve fiber layer characteristics in high myopia.
Graefes Arch Clin Exp Ophthalmol
January 2025
Department of Ophthalmology, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200001, China.
Purpose: To evaluate the posterior scleral stiffness of different regions in high myopic eyes and to explore its associations with macular choroidal and peripapillary retinal nerve fiber layer (pRNFL) thickness and vasculature.
Methods: Thirty subjects with high myopic eyes and 30 subjects with low myopic eyes were included in this study. The elastic modulus of the macular and peripapillary sclera at the temporal, nasal, superior and inferior regions were determined via shear wave elastography (SWE).
Altering the mechanical properties of self-assembled filaments through engineering of EspA bacterial protein.
Mater Today Bio
February 2025
Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer Sheva, 8410501, Israel.
Protein-based biomaterials are in high demand due to their high biocompatibility, non-toxicity, and biodegradability. In this study, we explore the bacterial secreted protein A (EspA), which self-assembles into long extracellular filaments, as a potential building block for new protein-based biomaterials. We investigated the morphological and mechanical properties of EspA filaments and how protein engineering can modify them.
View Article and Find Full Text PDFCryogenic, but not hypothermic, preservation disrupts the extracellular matrix of cell sheets.
Bioact Mater
April 2025
3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Rua Ave 1, Edifício 1 (Sede), 4805-694 Barco, Guimarães, Portugal.
Cell sheet (CS)-based approaches hold significant potential for tissue regeneration, relying on the extracellular matrix (ECM) for success. Like in native tissues, the ECM provides structural and biochemical support for cellular homeostasis and function. Effective preservation strategies that maintain ECM integrity are critical to enhance the therapeutic potential of CS-based approaches.
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