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Related Experiment Videos

Cephalometric changes during treatment with the open bite bionator.

J R Weinbach1, R J Smith

  • 1Department of Orthodontics, Washington University School of Dental Medicine, St. Louis, Mo.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|April 1, 1992
PubMed
Summary

The open bite bionator appliance is effective for correcting Class II malocclusions with mild open bites. It helps reduce facial convexity, overjet, and excessive vertical dimension in orthodontic patients.

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Area of Science:

  • Orthodontics
  • Craniofacial Growth

Background:

  • The open bite bionator is an orthodontic appliance used to correct specific types of malocclusions.
  • Understanding its application in patients with excessive vertical dimension is crucial for effective treatment planning.

Purpose of the Study:

  • To evaluate the effectiveness of the open bite bionator in treating Class II malocclusions.
  • To analyze cephalometric changes in patients treated with this appliance, particularly those with open bite tendencies.

Main Methods:

  • Retrospective analysis of lateral cephalometric radiographs from 39 patients treated with an open bite bionator.
  • Comparison of pretreatment cephalometric values with published standards.
  • Assessment of cephalometric changes during treatment against normal growth standards.

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Main Results:

  • The appliance is typically used for Class II cases with mild anterior open bites or tendencies, not marked excessive vertical dimension.
  • Treatment resulted in reduced facial convexity and overjet.
  • Maxillary molar eruption was reduced, and the increase in facial height was less than expected.

Conclusions:

  • The open bite bionator is effective for Class II correction in patients needing control of moderate excessive vertical dimension.
  • It demonstrates efficacy in managing mild anterior open bites and associated skeletal patterns.