i)

A → Incisor B → Premolar/molar/cheek tooth C → Canine

ii)

Shape of A(Incisor)

Is chisel shaped

Shape of B(Premolar)

Has flat and broad surface with cusps/ridges/projections

Shape of C(Canine)

(Bluntly) pointed/conical

iii)

Function of A(Incisor)

For cuttin/biting

Function of B(Premolar)

For grinding/chewing/crushing

Function of C(Canine)

For tearing

iv)

I → Enamel/Crown
II → Root

i)

A → Molar/premolar
B → Canine
C → Incisor

ii)

Functions of A (Molar/Premolar)

1. For grinding
2. For crushing
3. For chewing

Functions of B (Canine)

1. For stabbing
2. For tearing
3. For piercing

Functions of C (Incisor)

1. For cutting
2. For biting

iii)

Differences between A (Molar/premolar) and B(Canine)

iv)

Ways of ensuring proper dental care

1. Regular visit to the dentist
2. Regular brushing of teeth
3. Avoiding excessive intake of sugary food
4. Eating food rich in vegetables
5. Eating a lot of fruits
6. Eating food rich in calcium
7. Using the teeth for the right purpose
8. Avoid eating too hot/too cold foods

i)

I → Crown or Enamel
II → Dentine
III → Cement or Periodontal membrane
IV → Jaw bone or Root
V → Pulp Cavity

ii)

Functions of I (Crown or Enamel)

1. Protect teeth from harmful bacteria
2. Enables teeth withstand pressure of chewing
3. Cutting/chewing/protect dentine/protect pulp cavity

Functions of III (Cement or Periodontal membrane)

Holds tooth firmly in socket or jaw bone or supports the tooth

iii)

The part affected by tooth decay is V (Pulp Cavity)

iv)

Prevention of Tooth decay

1. Avoid using sharp-pointed objects
2. Avoid having dry mouth
3. Use water containing flourides to wash teeth/mouth
4. Avoid smoking
5. The teeth should be cleaned regularly after each meal/remove food particles from the teeth/flossing
6. Wash the mouth vigorously after each meal
7. Regular visit the dentist
8. Avoid eating too hot food
9. Avoid eating too much sugary food
10. Avoid eating too cold food