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Teeth

Teeth

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...

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Using a digital platform to establish odontometric variation based on race, gender and Angle classification.

S B Daniel¹, C Wiesen², J Christensen³

¹Orthodontics Program, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.

Orthodontics & Craniofacial Research

|April 19, 2023

Summary

Tooth size discrepancies (TSD) are common, affecting 36.6% of patients. Racial background, not gender or malocclusion, significantly influences TSD prevalence, highlighting the need for accurate diagnosis in orthodontic treatment.

Keywords:

Bolton analysis orthodontic diagnosis tooth size discrepancy

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Area of Science:

Orthodontics
Dental Morphology
Digital Dentistry

Background:

Interarch tooth size discrepancies pose clinical challenges in orthodontics.
Digital technology is increasingly used, but its impact on assessing tooth size is unclear.

Purpose of the Study:

To compare the prevalence of tooth size discrepancies using digital models versus traditional cast analysis.
To analyze discrepancies based on Angle's Classification, gender, and race.

Main Methods:

Mesiodistal tooth widths were measured on 101 digital models using odontometric software.
Chi-square tests and three-way ANOVA were used to analyze prevalence and differences among groups.

Main Results:

Overall Bolton tooth size discrepancy (TSD) prevalence was 36.6% (26.7% anterior).
No significant differences in TSD prevalence were found between genders or malocclusion groups.
Caucasian subjects showed a significantly lower prevalence of TSD compared to Black and Hispanic patients.

Conclusions:

Tooth size discrepancies are common, emphasizing the importance of accurate diagnosis in orthodontic treatment planning.
Racial background appears to be a significant factor influencing the prevalence of TSD.