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Related Experiment Videos

Non extraction short-term arch changes.

F Ferro1, L Perillo, A Ferro

  • 1Department of Orthodontics, Faculty of Medicine and Dentistry, II University of Naples, Italy. ferrofabrizia@libero.it

Progress in Orthodontics
|August 27, 2004
PubMed
Summary
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The Cetlin protocol effectively corrects Class II malocclusion in the short term, improving molar alignment and arch crowding without extractions. This non-extraction orthodontic approach enhances both upper and lower arch dimensions for better dental alignment.

Area of Science:

  • Orthodontics
  • Dentofacial Orthopedics

Background:

  • Class II, division 1 malocclusion presents significant orthodontic challenges.
  • Non-extraction treatment aims to correct malocclusions while preserving tooth structure.

Purpose of the Study:

  • To evaluate the short-term dentoalveolar effects of the Cetlin protocol.
  • To assess changes in sagittal and transversal planes during non-extraction Class II treatment.

Main Methods:

  • Eighty patients with Class II, div.1 malocclusion were treated using the Cetlin protocol.
  • The protocol included an upper distalizing plate, extraoral traction, and a lower lip bumper.
  • Dental models were analyzed pre- and post-treatment for molar correction and arch changes.

Main Results:

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  • Significant increase in upper arch perimeter observed.
  • Lip bumper use resulted in functional lower arch expansion, particularly in the transverse dimension.
  • Molar distalization, rotation, and expansion were achieved in the upper arch.

Conclusions:

  • The Cetlin protocol facilitates short-term molar correction and crowding resolution.
  • It enables space recovery in both arches for curve of Spee leveling and final adjustments.
  • Adjunctive fixed appliance therapy can further enhance intercuspation if needed.