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Related Concept Videos

Teeth01:15

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 and...
Tooth Anatomy01:21

Tooth Anatomy

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 grinding food.
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
Development of the Oral Microbiota01:28

Development of the Oral Microbiota

The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
The Hyoid Bone01:12

The Hyoid Bone

The hyoid bone is a small U-shaped bone located in the upper neck at the level of the inferior mandible, with its tips pointing posteriorly. It does not directly articulate with any other bone in the body. The hyoid acts as the attachment site for the tongue, the larynx, and the pharynx. It is held in position by a series of small muscles attached from above or below. These muscles help to move the hyoid up/down or forward/back in coordination with movements of the tongue, larynx, and pharynx...
Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...

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Related Experiment Video

Updated: May 25, 2026

Establishing Organoids from Human Tooth as a Powerful Tool Toward Mechanistic Research and Regenerative Therapy
11:02

Establishing Organoids from Human Tooth as a Powerful Tool Toward Mechanistic Research and Regenerative Therapy

Published on: April 13, 2022

Tooth formation is asymmetric when hypodontia exists.

Joel H Berg1

  • 1Department of Pediatric Dentistry, University of Washington, 6222 NE 74th Street, Seattle, WA 98115, USA. joelberg@u.washington.edu

The Journal of Evidence-Based Dental Practice
|February 14, 2012
PubMed
Summary

Children with hypodontia, a condition of missing teeth, may have a higher chance of developing asymmetry in their tooth formation. This retrospective study analyzed panoramic radiographs to investigate this link.

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Area of Science:

  • Dental developmental anomalies
  • Congenital disorders
  • Oral and maxillofacial radiology

Background:

  • Hypodontia is a common developmental anomaly characterized by the congenital absence of one or more teeth.
  • Assessing tooth formation symmetry is crucial for diagnosing and managing dental anomalies.
  • Panoramic radiography is a standard imaging technique for evaluating dental development in children.

Discussion:

  • This case-control study retrospectively analyzed panoramic radiographs of children to determine if hypodontia is associated with increased asymmetry in tooth formation.
  • The findings suggest a potential link between hypodontia and alterations in the symmetrical development of teeth.
  • Further research is warranted to elucidate the underlying mechanisms and clinical implications of this association.

Key Insights:

  • Children diagnosed with hypodontia exhibit a greater likelihood of presenting with asymmetry in tooth formation.
  • Panoramic radiographs are effective tools for identifying dental anomalies and assessing tooth formation symmetry.
  • The study highlights the importance of evaluating overall dental symmetry in pediatric patients with hypodontia.

Outlook:

  • Future research should focus on prospective studies to confirm these findings and explore genetic or environmental factors contributing to hypodontia-associated asymmetry.
  • Investigating the long-term orthodontic and functional consequences of tooth formation asymmetry in children with hypodontia is essential.
  • Developing standardized diagnostic criteria for assessing dental asymmetry in pediatric populations will aid in early intervention and management.