Question 3
The diagrams below illustrates methods a type of teeth. Study it and answer questions 3 (a), 3 (b), 3 (c) and 3 (d).
(a) Name the parts labelled I, II, III and IV
(i) I:
(ii) II:
(iii) III:
(iv) IV: [4 marks]
(b) Name the type of teeth illustrated in the diagram. [1 mark]
(c) State three ways of caring for teeth. [3 marks]
(d)Mention two diseases that could affect the teeth. [2 marks]
Observation
Majority of the candidates that attempted this question were able to answer some of the questions satisfactorily. Some candidates had difficulties naming the labels of the different parts of teeth. Enamel and Dentine were mostly interchanged erroneously thereby leading to loss of marks.
The expected answers are:
(a) Part labelled
I- enamel
II - dentine
III - sensory nerve ending
IV - gum
(b) Type of the tooth illustrated
Molar / Premolar
(c) Ways of caring for the teeth
- avoid eating sugary / sweet things
- avoid drinking/eating too hot / too cold food/beverages
- avoid opening bottle cork with teeth / picking teeth with sharp pointed object
- drink water containing fluorine
- massage gum regularly / chew fibrous food
- regular brushing / remove food particles
- regular visit to dentist
(d) Diseases that could affect the teeth
- periodontitis
- dental caries / tooth decay / plaque/gingivitis / sore gum / swollen gum