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Updated: Jul 30, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
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厚度对单色树脂复合材料半透明度参数和白度指数的影响

Ö Yağcı1, M Fidan2

  • 1Özhan Yağcı, DDS, Department of Restorative Dentistry, Faculty of Dentistry, Uşak University, Turkey.

Operative dentistry
|February 13, 2024
PubMed
概括

与多色彩选项相比,单色彩树脂复合材料具有更高的半透明度和白度,无论其厚度或老化程度如何. 这项研究评估了各种牙复合材料的透光度参数 (TP) 和牙科白度指数 (WID).

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Poisson's Ratio

Poisson's ratio is a material property that indicates their stress response. It explains the connection between the elongation or compression a material undergoes in the direction of an applied force and the contraction or expansion it experiences perpendicular to that force. When a slender bar is loaded axially, it stretches in the direction of the force and contracts laterally. Poisson's ratio is the negative ratio of this lateral contraction to the axial elongation. The negative sign ensures...
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Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
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Wood's structural properties derive from fibers aligned along the tree's length, contributing significantly to its mechanical strength. Wood exhibits up to twenty times greater tensile strength along these fibers compared to across them, and generally shows better performance under compression than tension. The length of fibers varies, with hardwoods having fibers around one twenty-fifth inch long and softwoods ranging from one-eighth to one-third inch.
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