Assessment of second-order clearances between orthodontic archwires and bracket slots via the critical contact angle for binding.

@article{Kusy1999AssessmentOS,
  title={Assessment of second-order clearances between orthodontic archwires and bracket slots via the critical contact angle for binding.},
  author={Robert P. Kusy and John Q Whitley},
  journal={The Angle orthodontist},
  year={1999},
  volume={69 1},
  pages={71-80}
}
Twenty-six archwires and 24 brackets were selected from among the hundreds of products available that nominally have from 18 to 22 mil bracket slots and 14, 16, 17, 18, 19, and/or 21 mil archwire sizes. After the archwires and brackets were dimensioned, a minimization-maximization algorithm was applied to the measurements in order to establish the likely boundaries of the critical contact angle for binding (thetac) as defined by the presence and absence of second-order clearance. From among the… CONTINUE READING

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