Tandem Appliance

The tandem appliance is a fixed appliance that is designed to correct an underbite in patients who are still growing. The intraoral design of the appliance makes it more comfortable than conventional devices.

Temporary Anchorage Device (TAD)

A miniature surgical screw that resembles an earring stud when inserted. The TAD is positioned in gum tissue and bone tissue and serves as an anchor for applying the force required to move teeth in a direction that braces alone cannot accomplish. When the TAD is no longer needed, it is removed.


A tiny rubber band that holds the orthodontic wire in the bracket slot. Also called a “ligature” or “ligating module.” They come in a variety of colors.

Tongue Crib

An orthodontic appliance used to stop habits or force exerted by the tongue against the teeth and the bone that supports them. These are often used with a tongue thrust habit which causes an open bite.

Tongue Thrust

A habit where an individual’s tongue pushes against the teeth when swallowing. The tongue is one of the strongest muscles in the body and the force generated by it can move the teeth and bone and may lead to an anterior or posterior open bite.