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Incisor crown shape and crowding.

Anwar Ali Shah1, Claire Elcock, Alan H Brook

  • 1Department of Oral Health and Development, School of Clinical Dentistry, Claremont Crescent, Sheffield S10 2TA, United Kingdom. a.a.shah@sheffield.ac.uk

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|May 17, 2003
PubMed
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This study explored the link between mandibular incisor crown shape and dental crowding. While some correlations were found in women, the study concluded that incisor crown shape does not predict lower incisor crowding.

Area of Science:

  • Orthodontics and Dental Morphology
  • Human Craniofacial Development

Background:

  • Dental crowding is a common orthodontic concern.
  • Understanding factors contributing to crowding is crucial for treatment planning.

Purpose of the Study:

  • To investigate the relationship between mandibular incisor crown shape and dental crowding.
  • To determine if incisor morphology can predict crowding severity.

Main Methods:

  • Analysis of study models from 50 untreated individuals.
  • Measurement of mesiodistal width at contact point and midpoint levels of mandibular incisors.
  • Quantification of crowding using Little's irregularity index and anterior tooth size-arch length discrepancy.

Main Results:

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  • Significant correlations were observed between the ratio of mesiodistal widths and anterior tooth size-arch length discrepancy in women.
  • Correlation coefficients of 0.52 (P=.008) for central incisors and 0.55 (P=.005) for lateral incisors were found in women.
  • No significant predictors of lower incisor crowding were identified based on mandibular incisor crown shape in the overall study population.

    • Conclusions:

    • Mandibular incisor crown shape shows limited correlation with dental crowding, particularly in women.
    • Incisor crown morphology is not a reliable predictor for lower incisor crowding.
    • Further research may be needed to explore other potential etiological factors for dental crowding.