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Injectable calcium phosphate and styrene–butadiene polymer-based root canal filling material

Hala B. Kaka
Hala B. Kaka
 y 
Raid F. Salman
Raid F. Salman
   | 21 feb 2021
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Article Category: Technical report
Publicado en línea: 21 feb 2021
Páginas: 19 - 26
DOI: https://doi.org/10.2478/abm-2021-0003
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© 2021 Hala B. Kaka et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Fitted on a flat glass plate (microscope slide), a plaster of paris mold containing cement material for testing. An indenter needle was lowered vertically onto the surface of the material and allowed to remain there for 5 s. The indentation was repeated at 2 min intervals until the indenter impression ceased to be visible in the material. The net setting time was recorded as the time between the beginning of mixing and the time when the indenter did not make an impression in the material.
Fitted on a flat glass plate (microscope slide), a plaster of paris mold containing cement material for testing. An indenter needle was lowered vertically onto the surface of the material and allowed to remain there for 5 s. The indentation was repeated at 2 min intervals until the indenter impression ceased to be visible in the material. The net setting time was recorded as the time between the beginning of mixing and the time when the indenter did not make an impression in the material.

Figure 2

Digital radiograph of samples and an aluminum step wedge that was graduated from 1 mm to 9 mm thick. In the powder constituents, 3 different concentrations of Bi2O3 were used: 3%, 5%, and 7%. Discs of the material (10 mm diameter and 1.0 mm height) were prepared for each concentration. An X-ray machine operating at 65 kV, 10 mA was used to produce an image on a phosphorus plate film. The mean of 10 samples of each concentration of Bi2O3 was taken as the density of the material and was compared with the density of the aluminum step wedge using an optical densitometer (Table 1).
Digital radiograph of samples and an aluminum step wedge that was graduated from 1 mm to 9 mm thick. In the powder constituents, 3 different concentrations of Bi2O3 were used: 3%, 5%, and 7%. Discs of the material (10 mm diameter and 1.0 mm height) were prepared for each concentration. An X-ray machine operating at 65 kV, 10 mA was used to produce an image on a phosphorus plate film. The mean of 10 samples of each concentration of Bi2O3 was taken as the density of the material and was compared with the density of the aluminum step wedge using an optical densitometer (Table 1).

The radiopacity of the aluminum step wedge

Aluminum thickness (mm) Radiopacity†
1 1.12
2 1.00
3 0.95
4 0.87
5 0.81
6 0.72
7 0.66
8 0.60
9 0.37
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Medicine, Assistive Professions, Nursing, Basic Medical Science, other, Clinical Medicine
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