Long-term effects of rapid maxillary expansion: a posteroanterior cephalometric evaluation.

  title={Long-term effects of rapid maxillary expansion: a posteroanterior cephalometric evaluation.},
  author={Christopher G Cameron and Lorenzo Franchi and Tiziano Baccetti and James A. McNamara},
  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={121 2},
  pages={129-35; quiz 193}
The aim of this study was to investigate long-term effects induced by rapid maxillary expansion (RME), followed by comprehensive orthodontic treatment, in a sample of 42 patients compared with normal growth changes in a sample of 20 subjects. Treated subjects underwent Haas-type RME with 2 turns a day (0.25 mm per turn) until the expansion screw reached 10.5 mm (about 21 days). The Haas expander was kept on the teeth as a passive retainer for an average of about 2 months. Immediately after the… CONTINUE READING

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