Analyze The Electrical Insulation Property of PMMA in Dentistry

PMMA has electrical insulation when used in dentistry. Its principle and characteristics are as follows:

The principle of electrical insulation

The polarity of the methyl ester group on the PMMA side is not very high. The molecular structure lacks free electrons or ions that are easy to conduct electricity, and the charge is difficult to move freely within it. Therefore, it has good dielectric properties and electrical insulation performance.

Characteristics of electrical insulation

Affected by frequency: The tangent of the dielectric loss Angle decreases as the frequency increases. Temperature and frequency have an impact on the dielectric constant. However, climate and humidity have little effect on the electrical properties of PMMA. But compared with materials such as polyethylene (PE) and polystyrene (PS), its electrical properties are slightly inferior.

Application advantages: In dental applications, the electrical insulation property of PMMA can prevent current conduction, ensure patient safety, prevent discomfort or injury caused by current stimulation, and at the same time avoid interference with electronic devices in the oral cavity.