Identify and describe the functions of parts of a tooth, and explain how tooth decay can be prevented.

i) Name each of the parts labeled I, II, III, IV and V.

• I: Enamel
• II: Dentine
• III: Pulp cavity
• IV: Gum
• V: Jaw bone

ii) What is the function of each of the parts labeled I and III?

• I (Enamel): Protects the tooth from wear and tear and chemical attack.
• III (Pulp cavity): Contains nerves and blood vessels that supply nutrients to the tooth and provide sensation.

iii) Which of the labeled parts could be affected by tooth decay?

• I, II, and III

iv) State three ways by which tooth decay may be prevented.

• Brush teeth regularly with fluoride toothpaste.
• Reduce the intake of sugary foods and drinks.
• Visit the dentist for regular check-ups.