Related Experiment Video
Updated: Feb 12, 2026
Exfoliation of Egyptian Blue and Han Blue, Two Alkali Earth Copper Silicate-based Pigments
Published on: April 24, 2014
Physical and biological properties of a newly developed calcium silicate-based self-adhesive cement
Liang Chen1, Jie Yang1, Jingyuan Rebecca Wang1
1Bisco, Inc, Schaumburg, Illinois, USA.
Purpose:
To evaluate the physical and biological properties of a novel calcium silicate-based self-adhesive resin cement (TheraCem) by comparison with a traditional self-adhesive resin cement (UniCem 2) and a resin-modified glass-ionomer cement (FujiCEM 2).
Methods:
pH of the cements was measured with moist pH strips. Antimicrobial activity was evaluated by a modified disk diffusion assay. Calcium release of TheraCem in water or lactic acid was measured with an ion selective pH meter for 56 days. Shear bond strength of the cements to zirconia after incubation in water or lactic acid for 7 days was assayed according to ISO 29022:2013, and the fractured surface of zirconia and cement were observed with a stereomicroscope and a scanning electron microscope, respectively.
Results:
TheraCem started with an acidic pH value of 4.0 and stabilized at pH 9.0, whereas the other two cements remained acidic. TheraCem and FujiCEM 2 displayed antimicrobial activity, but not UniCem 2. Calcium release was observed from TheraCem, which was higher in lactic acid than in deionized water. TheraCem showed highest shear bond strength to zirconia among the three cements, which was not impaired by incubation in lactic acid. In contrast, bond strength of UniCem 2 and FujiCEM 2 decreased significantly under the acidic condition. Consistently, scanning electron micrographs demonstrated marginal degradation of UniCem 2 and FujiCEM 2, but not TheraCem, samples in the acid. The results suggest that TheraCem had features that would help reduce or prevent secondary caries.
Clinical Significance:
The new calcium silicate-based self-adhesive resin cement, TheraCem, had an alkaline pH and could be desirable in clinical applications with advantages such as bond strength and stability, antimicrobial activity, as well as calcium release.
More Related Videos
09:39Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
14:42Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
Published on: May 2, 2014
Related Concept Videos
02:57Physical and Chemical Properties of Matter
01:26Physical Properties of Amines
02:19Physical Properties Affecting Solubility
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
02:33Physical Properties of Alkanes
02:17Physical Properties of Ethers
An ether molecule has a net dipole moment due to the polarity of C–O bonds. Subsequently, boiling points of ethers are lower than those of alcohols of comparable molecular weight and slightly higher than those of hydrocarbons of comparable molecular weight (Table 1).
Ethers can act as hydrogen bond acceptors, making them more water-soluble than hydrocarbons, but since ethers cannot act as hydrogen bond donors, they are much less soluble in water than alcohols. Ethers are considered...
01:18Urine: Physical and Chemical Properties
The concentration of these solutes varies, with urea being the most abundant nitrogenous waste product. Other solutes include sodium, chloride, potassium, phosphate,...