Haileybury Astana IGCSE Science TEETH Haileybury Astana IGCSE Science

Learning Objectives Draw the structure of teeth Identify the four types of human teeth and describe their action in eating food Describe the process of tooth decay. Suggest ways of reducing tooth decay.

Structure of a tooth (Molar) Enamel crown Dentine Pulp cavity Blood vessels and nerves Root Fibres attaching teeth to jawbone Apex Bone

Structure of a tooth (Molar) Draw the structure of a tooth and label it!

Types of Teeth Draw each type of tooth and label it.

Types of Teeth Match the pairs! Molar Canine Incisor Premolar Chisel shaped for biting off chunks of food Canine Large and flattened for crushing food Incisor Flattened for crushing food Premolar Pointed for gripping and tearing

Types of Teeth Incisor Canine Premolar Molar Chisel shaped for biting off chunks of food Canine Pointed for gripping and tearing Premolar Flattened for crushing food Molar Large and flattened for crushing food

Tooth decay or cavities are caused by a combination of bacteria and food. These bacteria change the foods that we eat, especially sugars and starches, into acids. The acid dissolves the enamel. Continuous damage creates holes in your teeth, which are called cavities. Tooth decay is prevented by brushing, flossing and using fluoride-containing products. Tooth Decay