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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.
Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...
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...
Non-vascular Seedless Plants02:26

Non-vascular Seedless Plants

The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
Seedless Vascular Plants03:24

Seedless Vascular Plants

Seedless Vascular Plants Were the First Tall Plants on Earth
Basic Plant Anatomy: Roots, Stems, and Leaves02:27

Basic Plant Anatomy: Roots, Stems, and Leaves

The primary organs of vascular plants are roots, stems, and leaves, but these structures can be highly variable, adapted for the specific needs and environment of different plant species.

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Related Experiment Video

Updated: Jun 20, 2026

Impact of Common Fruit Juices and Toothbrushing on the Discoloration of Primary Teeth
04:40

Impact of Common Fruit Juices and Toothbrushing on the Discoloration of Primary Teeth

Published on: March 27, 2026

The toothbrush plant.

E J Neiburger1

  • 1Lake County Museum.

Journal of the Massachusetts Dental Society
|September 25, 2009
PubMed
Summary
This summary is machine-generated.

The toothbrush plant, a natural chew stick from Africa and the Middle East, offers therapeutic benefits for oral hygiene. Its frayed wood fibers deliver minerals and chemicals for teeth and gum health, potentially aiding industrialized nations.

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Establishing Organoids from Human Tooth as a Powerful Tool Toward Mechanistic Research and Regenerative Therapy
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Published on: April 13, 2022

Area of Science:

  • Ethnobotany
  • Oral Health
  • Natural Products

Background:

  • The toothbrush plant (Salvadora persica) is a shrub native to Africa and the Middle East.
  • Indigenous populations utilize its chewable wood for dental hygiene.
  • The wood contains natural minerals and chemicals beneficial for oral care.

Purpose of the Study:

  • To explore the potential oral health benefits of the toothbrush plant.
  • To evaluate its suitability as a natural dental hygiene tool for broader populations.

Main Methods:

  • The study focuses on the traditional use of the toothbrush plant as a chew stick.
  • Analysis of the therapeutic minerals and chemicals present in the wood fiber.

Main Results:

  • Chewing the wood frays it into a natural brush.
  • The frayed wood delivers beneficial minerals and chemicals to teeth and gingiva.
  • Traditional use demonstrates efficacy in oral cleaning.

Conclusions:

  • The toothbrush plant offers a natural and effective method for oral hygiene.
  • Its therapeutic properties present a potential benefit for individuals in industrialized nations seeking natural oral care solutions.