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Related Concept Videos

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.
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...

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Related Experiment Video

Updated: Jul 11, 2026

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
07:26

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

Published on: August 22, 2022

[Left lower first premolar with 3 root canals: a case report].

Xue-qian Chi1, Cui-li Cao, Ya-jun Feng

  • 1Dept. of Endodontics, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, China.

Hua Xi Kou Qiang Yi Xue Za Zhi = Huaxi Kouqiang Yixue Zazhi = West China Journal of Stomatology
|September 28, 2007
PubMed
Summary
This summary is machine-generated.

Three root canals were discovered in a lower premolar, highlighting the importance of recognizing root canal variations. This finding emphasizes careful examination to prevent missing canals during endodontic treatment.

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Area of Science:

  • Endodontics
  • Dental Anatomy
  • Radiology

Background:

  • The anatomy of the mandibular first premolar can present variations in root canal morphology.
  • Accurate diagnosis of root canal systems is crucial for successful endodontic treatment.

Observation:

  • A preoperative radiograph indicated potential root canal variation in a left lower first premolar.
  • During endodontic treatment, three distinct root canals were identified in the treated tooth.

Findings:

  • The presence of three root canals was confirmed by postoperative radiography.
  • This case demonstrates an unusual root canal configuration in a mandibular first premolar.

Implications:

  • Dentists should increase awareness of root canal variations in lower premolars.
  • Thorough radiographic interpretation and clinical examination are essential to detect and manage complex root canal systems, preventing treatment failure.