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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

1.8K
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...
1.8K
Teeth01:15

Teeth

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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.
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...
1.4K

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Related Experiment Video

Updated: Dec 9, 2025

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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Mandibular first premolar with five root canals: a case report.

Ming Zhang1, Jian Xie2, Yan-Huang Wang1

  • 1Fujian Key Laboratory of Oral Diseases & Department of Endodontics, School and Hospital of Stomatology, Fujian Medical University, 246 Yang Qiao Middle Road, Fuzhou, 350002, China.

BMC Oral Health
|September 11, 2020
PubMed
Summary
This summary is machine-generated.

A rare case of a mandibular first premolar with five root canals was successfully treated. This highlights the critical importance of recognizing root canal anatomical variations for effective endodontic therapy.

Keywords:
Anatomic variationCase reportDental operating microscopeEndodontic treatmentRoot canal system

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Area of Science:

  • Endodontics
  • Dental Anatomy

Background:

  • Successful root canal treatment relies on understanding root canal anatomy.
  • Variations in mandibular first premolar root canal anatomy are clinically significant.

Observation:

  • A 25-year-old male presented with symptomatic pulpitis in tooth #44.
  • Initial treatment revealed four canals; a fifth canal, the mesiolingual root canal, was discovered later.
  • Cone beam computed tomography (CBCT) confirmed the fifth canal's presence and curvature.

Findings:

  • This case presents the first documented instance of a fifth canal in a mandibular first premolar.
  • The Mtwo rotary system was used for root canal preparation.
  • CBCT imaging provided a detailed three-dimensional reconstruction of the complex root canal system.

Implications:

  • This case advances the understanding of mandibular first premolar anatomical variations.
  • Accurate diagnosis and treatment of complex root canal anatomy are essential for successful endodontic outcomes.
  • This report serves as a valuable reference for clinicians treating mandibular first premolars.