ORTHODONTICS: Intrusion - Chris Chang

Gummy smile correction requires connecting the arch wire with screws. In this case, power chains cannot be hooked due to the upward traction. 

A simple solution is to tie the power chains directly to the arch wire in the anterior segment, also known as the Chris’ tie, and then attach the power chains to the screw heads. It’s easy to maneuver and can save on material costs. In addition, during space closure, if the anterior segment is required to be simultaneously connected with molar tubes and posterior screws, one can combine a Chris’ tie and a canine hook to achieve both aims. The Chris’ tie is a cost-saving, efficient and simple alternative to hooks in these two common clinical scenarios.

► See also: ORTHODONTICS: Distalization of the molar using Top Jet Distalizer