What are 1st, 2nd and 3rd order bends?

By Vishaal on Tuesday, December 15, 2009 with 0 comments

Sections of tooth undergoing development.Image via Wikipedia

1st order bends: faciolingual bends in the arch wires, necessary to compensate for variations in the contour of labial surfaces of individual teeth.

2nd order bends: angled bends in the arch wire required for mesio-distal root positioning: angulation of the brackets relative to the long axis of the tooth;

3rd order bends: a varying twist in segments of each rectangular wire, in order to make the wire fit passively, because the facial surface of individual teeth vary markedly in inclination to the true vertical.

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Category: Orthodontics Notes



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