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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
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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.
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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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Association between root resorption and tooth development: A quantitative clinical study.

Xinyi Li1, Jingchen Xu1, Yuanyuan Yin1

  • 1State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.

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 2, 2020
PubMed
Summary
This summary is machine-generated.

Orthodontic treatment leads to less external apical root resorption in immature teeth. Tooth development is a key predictor of root resorption, with developing teeth showing significantly less resorption than fully developed ones.

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Area of Science:

  • Orthodontics
  • Dental Development
  • Radiology

Background:

  • External apical root resorption (EARR) is a common side effect of orthodontic treatment.
  • The relationship between tooth development and the extent of EARR requires further investigation.

Purpose of the Study:

  • To compare EARR in incompletely developed versus fully developed roots during orthodontic treatment.
  • To evaluate the predictive value of EARR for assessing tooth development.

Main Methods:

  • A cohort of 524 patients (aged 10-15 years) was analyzed.
  • Pre- and post-treatment digital radiographs were used to assess tooth development and quantify EARR using a novel 8-index measurement approach.
  • Statistical analyses included t-tests, correlation, and linear regression models to identify risk factors for EARR.

Main Results:

  • A statistically significant difference in EARR was observed based on tooth development, both before and after correction.
  • Immature teeth exhibited significantly less root resorption compared to mature teeth.
  • Multivariate analysis identified tooth development as the strongest predictor of EARR, followed by treatment duration, apex movements, and prior orthodontic treatment.

Conclusions:

  • Tooth development is a significant predictor of external apical root resorption.
  • Patients with immature teeth have a substantially lower risk of experiencing apical root resorption during orthodontic treatment.