Types of Movement
Center of Resistance
Rotation
Moments
Tipping
Translation
Counterbalancing Couple's Use in Orthodontics

 Counterbalancing Couples' Use in Orthodontics







Counterbalancing Couple (CBC) of Orthodontics

The CBC of orthodontic tooth movement is created by twisting a rectangular wire in a rectangular bracket. The twisted wire applies a couple that creates a moment.

Remember:

Moment (M) = Magnitude of a force (F) X Distance (D) between the two forces in which D is the width of the bracket slot.

Fa = 125g
Distance from Fa to CR is 10mm.

What is the moment of Fa?
A.) 125 g-mm
B.) 1250 g-mm
C.) 1000 g-mm

This will be the answer


If the bracket dimension is 0.5mm, what force must the twisted wire produce in order to prevent rotation of the tooth?
A.) 2500g
B.) 250g
C.) 25g

This will be the answer


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Last Update: August 20,1998
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