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Related Experiment Videos

Correlation between mandibular incisor crown morphologic index and postretention stability.

Marcos Roberto de Freitas1, Renata Cristina Faria Ribeiro de Castro, Guilherme Janson

  • 1Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.

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 22, 2006
PubMed
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Mandibular incisor crown shape does not influence the relapse of lower anterior crowding after orthodontic treatment. This finding is crucial for understanding postretention stability in orthodontic patients.

Area of Science:

  • Dentistry
  • Orthodontics
  • Dental Morphology

Background:

  • Postretention stability is a key outcome of successful orthodontic treatment.
  • Mandibular anterior crowding relapse is a common concern following orthodontic intervention.
  • Understanding factors influencing relapse is essential for long-term treatment success.

Purpose of the Study:

  • To investigate the correlation between mandibular incisor crown morphology and the relapse of mandibular anterior crowding.
  • To determine if tooth shape influences the stability of orthodontic results.

Main Methods:

  • A cohort of 56 subjects with Class I and II malocclusions, treated with premolar extractions and edgewise mechanics, was analyzed.
  • Mandibular anterior crowding was quantified using the Little irregularity index.

Related Experiment Videos

  • Mandibular incisor crown morphology was assessed using the Peck and Peck index from dental casts.
  • Pearson correlation coefficient was employed to analyze the relationship between morphology and relapse.

    • Main Results:

    • No significant correlation was found between the mandibular incisor crown morphologic index and the amount of mandibular anterior crowding relapse.
    • The mesiodistal and buccolingual proportions of the mandibular incisor crowns did not predict relapse.

    Conclusions:

    • Mandibular incisor crown morphology does not appear to be a significant factor in the relapse of mandibular anterior crowding.
    • Tooth morphology may not play a critical role in postretention stability concerning lower anterior crowding.