Which term refers to the introduction of ions into the tissues using an electric current?>

Iontophoresis is the correct answer because it specifically refers to the process of introducing ions into tissues using an electric current. While other options may sound similar, they do not accurately describe this specific process. Cataphoresis is the introduction of substances into tissues using an electric current, but it does not necessarily involve ions. Des-incrustation is a specific type of cathode therapy used for deep cleaning of the skin and does not involve introducing ions into tissues. Electro therapy is a broad term that can refer to various types of therapy using electric currents, but it is not specific to the introduction of ions into tissues. Therefore, Iontophoresis is the most accurate term for this process.