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Related Experiment Videos

Intermaxillary tooth size discrepancy and malocclusion: is there a relation?

Tancan Uysal1, Zafer Sari, Faruk Ayhan Basciftci

  • 1Department of Orthodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey. tancanuysal@yahoo.com

The Angle Orthodontist
|April 14, 2005
PubMed
Summary

Males and females show sex differences in overall tooth size ratios. Malocclusion groups exhibit significantly higher overall tooth size ratios compared to normal occlusion, indicating discrepancies in tooth size measurements.

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Area of Science:

  • Dentistry
  • Orthodontics
  • Anthropology

Background:

  • Tooth size ratios are crucial for orthodontic diagnosis and treatment planning.
  • Understanding sex differences and malocclusion-related variations in tooth size is essential for accurate assessments.

Purpose of the Study:

  • To investigate sex differences in tooth size ratios.
  • To compare tooth size discrepancies across different malocclusion types (Angle Class I, II, III) with normal occlusion.
  • To determine the prevalence of significant tooth size discrepancies (outside 2 SD from Bolton means).

Main Methods:

  • Comparative analysis of tooth size measurements from dental models.
  • Inclusion of 150 normal occlusion subjects and 560 patients with various malocclusions.
  • Statistical analysis using Student's t-test, ANOVA, and Tukey's HSD test.

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Main Results:

  • A significant sex difference was observed in the overall tooth size ratio for the normal occlusion group.
  • All malocclusion groups demonstrated statistically significant higher overall tooth size ratios compared to the normal occlusion group.
  • No significant differences were found among malocclusion groups, but a high percentage of patients had discrepancies exceeding 2 SD from the mean.

Conclusions:

  • Sex influences overall tooth size ratios in normal occlusion.
  • Malocclusion is associated with increased overall tooth size ratios.
  • Further research is needed to explore racial influences and the complex relationship between malocclusion and tooth size measurements.