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The article discusses research that has been completed regarding the existence of galvanic currents in the oral cavity. The role that dental cements play in insulating teeth against electric currents is mentioned. The impact that these currents have on the insulation of metallic restoration of the tooth is discussed.

A conference paper is presented on the impact of increased thickness and contact area of various dental filling materials such as resins, calcium hydroxide, and zinc oxide-eugenol. Researchers found that electric conductivity was not changed in zinc phosphate cement regardless of thickness. However, it was a poor insulator when exposed to moisture, as was calcium hydroxide.

The article discusses the logistics behind accurately measuring the electric conductivity of dental cements. Details are provided about the circuit design, calculations and instrumentation needed to properly measure electric conductivity. The response of dental cement to saline solution and distilled water is also described.

The article presents a method for determining the thermal conductivity of dental cement and applies the method to an investigation of three commercial cement materials. A previously developed method for determining the thermal conductivity of dentin is utilized within the investigation. The fact that the values for the thermal conductivity of cements used in dentistry fall within a similar general range to that of substances including optical crystals, glass, and Plexiglas is also noted.

The article focuses on measuring the electric conductivity of materials used in dental cement. Topics include studies on the behavior of galvanic currents in the mouth, the design of an apparatus or standardized test cells to measure a material's insulating properties, the amalgam-cement and copper-cement contact relationships in metallic fillings, calculation of the input impedance and insulating medium's resistance, and formulas related to electromotive forces.