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What is a second-order bend in orthodontic wire?

# What is a second-order bend in orthodontic wire? 
A. Bend to position a tooth buccolingually 
B. Bend to provide angulation of a tooth in mesiodistal direction (tip) 
C. Bend to provide correct angulation of a tooth in labiolingual direction (torque) 
D. Bend to rotate a tooth 



The correct answer is B. Bend to provide angulation of a tooth in mesiodistal direction (tip) 

A second-order bend is placed to provide angula tion of a tooth in the mesiodistal direction, also called “tip.” A first-order bend is placed in an arch wire to position a tooth in the labiolingual direc tion (in-out bend) or to rotate a tooth as seen in the occlusal plane. A bend to provide angulation in the labiolingual direction is called a third-order bend (torquing bend). 

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