The effect of maxillary first molar derotation on arch length.

  title={The effect of maxillary first molar derotation on arch length.},
  author={Stanley Braun and Budi Kusnoto and Carla A Evans},
  journal={American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics},
  volume={112 5},
In the correction of Class II malocclusions, derotation of the maxillary first molars is required to obtain an idealized Class I relation. Because of its trapezoidal shape, the maxillary first molar is believed to provide an arch length gain attendant to its derotation, which may subsequently be used to resolve deficiencies mesial to it. Two commonly used mechanisms for maxillary first molar derotation and its associated centers of rotation were studied. A transpalatal arch, when accompanied by… CONTINUE READING