Assignment - Infographics - 159
A Note on What Makes This an Infographic
A drawing of a mouth with four teeth labeled by name is a diagram. An infographic about teeth tells you why you have four different types of teeth, what job each one does, and what is actually inside a tooth - why a cavity hurts, what enamel is and why it matters, and what happens if the inner layers are exposed. That is a story worth telling.
Objective
Create a labeled diagram infographic in Canva showing the four types of human teeth and the internal cross-section of a tooth, with the function of each tooth type and the role of each internal layer explained.
Content to Cover
The Four Types of Teeth
An adult has 32 teeth (including wisdom teeth). They fall into four types, each with a different shape for a different job:
- Incisors (8 total): The four flat teeth at the front of the upper jaw and four at the front of the lower jaw. They have a straight, sharp edge for cutting and biting food. When you bite into an apple, the incisors do the work.
- Canines (4 total): The pointed teeth on either side of the incisors (one on each side, top and bottom). They are sharp and pointed for tearing and gripping food. Also called cuspids.
- Premolars (8 total): Also called bicuspids. Flat, broad teeth with ridges, positioned behind the canines. They crush and grind food into smaller pieces.
- Molars (8-12 total, including wisdom teeth): The large, flat teeth at the back. They have a broad, ridged surface for heavy grinding. Wisdom teeth are a third set of molars that appear in adulthood - some people have them, some do not.
Show a diagram of the upper and lower jaw with all four types labeled and their positions marked.
Internal Structure of a Tooth
Show a cross-section of a single tooth cut in half vertically:
- Enamel: The hard, white outer layer covering the crown (the part above the gum). It is the hardest substance in the human body. Enamel protects the inner layers from damage and acid. Once damaged, enamel cannot regrow.
- Dentine: The layer below enamel. Softer than enamel, yellowish in color. Dentine makes up most of the tooth. When a cavity reaches the dentine, the tooth becomes sensitive to hot, cold, and sweet.
- Pulp: The soft, living tissue at the center of the tooth. It contains blood vessels (which supply nutrients) and nerve fibers (which sense pain). When a cavity reaches the pulp, it causes severe toothache and may require a root canal.
- Cementum: A thin layer covering the root of the tooth (the part below the gum line). It anchors the tooth to the jawbone.
- Root: The part of the tooth below the gum. Held in place in the jawbone by the periodontal ligament. Incisors have one root; molars have two or three.
Why Tooth Care Matters
Add a brief panel: bacteria in the mouth feed on sugars and produce acid. This acid dissolves enamel over time (tooth decay / cavities). Brushing twice a day removes the bacterial layer (plaque) before it hardens into tartar. Fluoride in toothpaste strengthens enamel.
Design in Canva
- A jaw diagram showing all four tooth types with labels and a one-line function for each.
- A large cross-section of a single tooth showing enamel, dentine, pulp, cementum, and root - each labeled with its role.
- A small tooth care panel: what happens when each layer is damaged and one prevention tip.
Required Elements
- All four types of teeth labeled with position and function.
- Cross-section showing enamel, dentine, pulp, cementum, and root with each layer’s role.
- What happens when enamel/dentine/pulp is damaged.
- One tooth care fact.
- Title: “Parts of a Tooth.”