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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...
Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
Once absorbed into the systemic circulation, local anesthetics can affect the organs that depend on the functioning of sodium...
The Availability Heuristic01:08

The Availability Heuristic

A heuristic is a general problem-solving framework (Tversky & Kahneman, 1974). You can think of these as mental shortcuts that are used to solve problems. Different types of heuristics are used in different types of situations, and the impulse to use a heuristic occurs when one of five conditions is met (Pratkanis, 1989):

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Related Experiment Video

Updated: Jun 11, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
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Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants

Published on: March 29, 2018

Dentine hypersensitivity - Australian dentists' perspective.

N Amarasena1, J Spencer, Y Ou

  • 1Australian Research Centre for Population Oral Health, School of Dentistry, The University of Adelaide, South Australia, Australia. najith.amarasena@adelaide.edu.au

Australian Dental Journal
|July 8, 2010
PubMed
Summary
This summary is machine-generated.

Australian dentists generally understand dentine hypersensitivity, identifying abrasion and gingival recession as key factors. They commonly manage this condition with desensitizing agents, aligning with current scientific understanding.

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Last Updated: Jun 11, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
08:12

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants

Published on: March 29, 2018

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
05:42

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique

Published on: July 27, 2022

Area of Science:

  • Dentistry
  • Oral Health
  • Dental Research

Background:

  • Dentine hypersensitivity is a common yet poorly understood dental condition.
  • Understanding dentists' perceptions is crucial for improving patient care.

Purpose of the Study:

  • To investigate Australian dentists' views on dentine hypersensitivity.
  • To explore perceptions of occurrence, causes, triggers, diagnosis, and management.

Main Methods:

  • A questionnaire-based survey was distributed to 800 randomly selected Australian dentists.
  • Data from 284 private practitioners were analyzed.

Main Results:

  • Most dentists estimated dentine hypersensitivity occurrence below 20%, prevalent in the 30-49 age group.
  • Abrasion and gingival recession were identified as primary predisposing factors, with cold stimuli as the most common trigger.
  • A majority diagnosed using differential diagnosis, and most prescribed desensitizing agents for home use.

Conclusions:

  • Australian dentists' perceptions of dentine hypersensitivity align with existing scientific consensus.
  • Awareness of underlying mechanisms is high, with a focus on exposed dentinal tubules as a cause.