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The graphical analysis of tooth width discrepancy

C T Ho1, T J Freer

  • 1Faculty of Dentistry, University of Queensland, Brisbane, Australia.

Australian Orthodontic Journal
|March 1, 1994
PubMed
Summary
This summary is machine-generated.

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This study introduces a new graphical method to analyze tooth width discrepancies between upper and lower jaws. This approach helps orthodontists identify potential interdigitation issues before treatment begins.

Area of Science:

  • Dentistry
  • Orthodontics
  • Dental Morphology

Background:

  • Standard tooth width ratio tables lack comprehensive interdigitation analysis.
  • Assessing inter-arch tooth width discrepancy is crucial for orthodontic treatment planning.

Purpose of the Study:

  • To develop a method for comprehensive analysis of inter-arch tooth width discrepancy.
  • To create a visual tool for determining maxillary and mandibular tooth width harmony.

Main Methods:

  • Mesiodistal tooth widths (first permanent molar to first permanent molar) were measured from 60 pretreatment study models.
  • Cumulative percentage tooth width ratios were calculated, relating mandibular to maxillary teeth.
  • A graphical method plotting these ratios with standard deviations was developed.

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Main Results:

  • 13 mean cumulative percentage ratios were established and plotted graphically.
  • The graph allows for immediate recognition of deviations from the mean.
  • This provides a standard for comparing new cases and identifying discrepancies.

Conclusions:

  • A novel graphical method for assessing tooth width discrepancy has been developed.
  • This method aids in localizing tooth width discrepancies and recognizing incompatibilities.
  • It serves as an invaluable tool for orthodontic treatment planning, ensuring better interdigitation outcomes.