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Twenty-year clinical experience with fixed functional appliances.

Alexandre Moro1,2, Suellen W Borges3, Paula Porto Spada2,3

  • 1Universidade Federal do Paraná, Programa de Pós-graduação em Ortodontia (Curitiba/PR, Brazil).

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Summary

Rigid fixed functional appliances yield superior skeletal outcomes for Class II malocclusion compared to flexible or hybrid types. These appliances are biomechanically advantageous for dolichofacial patients.

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Area of Science:

  • Orthodontics
  • Biotechnology
  • Dentofacial Orthopedics

Background:

  • Choosing the optimal fixed functional appliance for Class II malocclusion treatment presents a clinical challenge due to the variety of available devices.
  • This study reviews the evolution of fixed functional appliances and presents a 20-year clinical experience.

Observation:

  • Fixed functional appliances are categorized into flexible, rigid, and hybrid types, each with distinct biomechanical actions.
  • Four clinical cases are presented to illustrate the application and outcomes of these different appliance types.

Findings:

  • Rigid fixed functional appliances demonstrate superior skeletal results compared to flexible and hybrid alternatives in Class II correction.
  • Flexible and hybrid appliances achieve Class II correction primarily through dentoalveolar changes, comparable to the effects of Class II elastics.

Implications:

  • Fixed functional appliances offer biomechanical advantages over Class II elastics for treating Class II malocclusion, particularly in dolichofacial patients.
  • The choice of appliance impacts treatment outcomes, with rigid types favoring skeletal correction.