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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 8, 2026

Lateral Molar Approach-Driven Transoral Endoscopic Procedure for Benign Infratemporal Fossa Tumor Resection
04:04

Lateral Molar Approach-Driven Transoral Endoscopic Procedure for Benign Infratemporal Fossa Tumor Resection

Published on: August 15, 2025

A mandibular third molar with three mesial roots: a case report.

Gianluca Plotino1

  • 1Department of Endodontics, Catholic University of Sacred Heart, Rome, Italy. gplotino@fastwebnet.it

Journal of Endodontics
|January 25, 2008
PubMed
Summary

This case study highlights a rare mandibular molar with three separate mesial roots and four root canals. Recognizing unusual anatomy is crucial for successful endodontic treatment.

Area of Science:

  • Dentistry
  • Endodontics
  • Dental Anatomy

Background:

  • Mandibular molars typically present with two roots and three root canals.
  • Anatomical variations in root and canal morphology are common in mandibular molars.
  • Understanding these variations is essential for successful endodontic outcomes.

Observation:

  • A mandibular third molar exhibited an unusual configuration with three separate mesial roots.
  • The pulp chamber floor displayed four distinct canal orifices.
  • Radiographic examination confirmed four separate root canals, each terminating in its own foramen.

Findings:

  • The case presented three mesial canals housed within three distinct mesial roots.
  • This anatomical arrangement is exceptionally rare, with no prior reports detailing such a configuration.

Related Experiment Videos

Last Updated: Jul 8, 2026

Lateral Molar Approach-Driven Transoral Endoscopic Procedure for Benign Infratemporal Fossa Tumor Resection
04:04

Lateral Molar Approach-Driven Transoral Endoscopic Procedure for Benign Infratemporal Fossa Tumor Resection

Published on: August 15, 2025

  • The presence of four separate canal orifices and foramina was confirmed.

    • Implications:

    • This case underscores the critical importance of identifying accessory canals and unusual root canal morphology.
    • Thorough diagnostic evaluation, including radiography and careful examination of the pulp chamber floor, is vital.
    • Awareness of rare anatomical variations can prevent endodontic treatment failure and improve patient outcomes.