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Tooth Anatomy

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.

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 and...

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Related Experiment Video

Updated: May 9, 2026

The Establishment of a Murine Maxillary Orthodontic Model

The Establishment of a Murine Maxillary Orthodontic Model

Published on: October 27, 2023

First permanent molar root development arrest associated with compound odontoma.

Sachin A Gunda¹, Anil Patil, Aniruddha Varekar

¹Department of Pedodontics, Bharati Vidyapeeth Deemed University Dental College and Hospital, Sangli, Maharashtra, India.

BMJ Case Reports

|July 9, 2013

Summary

This summary is machine-generated.

Infection from a primary molar tooth arrested the root growth of the underlying permanent tooth, causing eruption failure. This rare case highlights the critical link between primary teeth and permanent tooth development.

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Last Updated: May 9, 2026

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Area of Science:

Dentistry
Oral Pathology
Developmental Biology

Background:

Primary teeth trauma or infection can negatively impact developing permanent tooth buds due to anatomical proximity.
Periapical infections from primary teeth can spread to adjacent and underlying permanent tooth buds, causing malformations.

Observation:

A rare case is presented involving a complete arrest of maxillary first permanent molar root growth.
The arrest was attributed to periapical infection originating from the second primary molar.

Findings:

The infection led to the failure of the maxillary first permanent molar's eruption.
Histopathological analysis revealed a compound odontoma associated with the affected permanent molar.

Implications:

This case underscores the importance of managing primary tooth infections to prevent developmental anomalies in permanent dentition.
Understanding the impact of periapical pathology on developing tooth buds is crucial for pediatric dentistry and orthodontics.