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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

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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...
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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.
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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Updated: Oct 1, 2025

Establishing Organoids from Human Tooth as a Powerful Tool Toward Mechanistic Research and Regenerative Therapy
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The Toothkey - Misguided Development or Instrument for Universal Application?

Wolfgang Busch1

  • 1Founding member of "Arbeitskreis für die Geschichte der Zahnheilkunde" - chapter of Deutsche Gesellschaft für Zahn-Mund und Kieferheilkunde - DGZMK (German Society of the History of Dentistry).

Journal of the History of Dentistry
|March 3, 2022
PubMed
Summary
This summary is machine-generated.

The dental toothkey was a common 18th-19th century tool for extracting molars. Historical analysis questions its effectiveness and safety, suggesting potential harm outweighed therapeutic benefits.

Keywords:
DentistExtractionGoats FootLe tire-toirMolar TeethPelicanToothkeyUeberwurf

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Area of Science:

  • Dental History
  • Medical Instrument Analysis
  • Iatrogenic Effects

Background:

  • The dental toothkey was a prevalent instrument for molar extraction from the mid-18th to late-19th centuries.
  • Its widespread use suggests it was considered a standard dental tool during this period.

Observation:

  • This study examines the toothkey's efficacy and medical reasonableness within its historical context.
  • It considers the available alternatives and the instrument's application in dental practice.

Findings:

  • The analysis reveals a potential mismatch between the intended therapeutic benefits of the toothkey and the iatrogenic damage it could cause.
  • This raises questions about its ethical justification and medical appropriateness.

Implications:

  • The findings suggest that the historical use of the toothkey may not align with modern medical ethics regarding patient safety.
  • Re-evaluating historical dental instruments through the lens of potential harm is crucial for understanding medical progress.