Local anaesthetic is an essential tool when performing an array of dental treatments, namely any which would otherwise cause pain or discomfort for the patient. In the majority of cases, dental anaesthetic works without a hitch and you can successfully go ahead with the treatment.
Occasionally, however, certain patients can experience problems where the anaesthetic either doesn't work or causes an unexpected reaction. It's helpful to be able to spot where you might run into a problem, what you can do about it.
TENS is an abbreviation for transcutaneous electrical nerve stimulators. A TENS machine is a device that makes use of electrotherapy to facilitate nerve stimulation and encourage therapeutic healing from acute or chronic pain.
On the other hand, EMS is an abbreviation for electronic muscle stimulators. EMS machines also use electrotherapy, but they're instead used to facilitate the contraction and relaxation of muscles. This article discusses the two types of machines (in question and answer format) for the benefit of affected patients.