A dental disease characterised by moltting of teeth is due to the presence of a certain chemical element in drinking water. Which of the following is that element? 

1. Mercury

2. Chlorine

3. Fluorine

4. Boron

The layer of cells that secret enamel of tooth is: 

1. dentoblast

2. ameloblast

3. osteoblast

4. odontoblast

A baby boy aged two years is admitted to play-school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

(1) Incisors

(2) Canines

(3) Premolars

(4) Molars

The primary dentition in human differs from permanent dentition in not having one of the

following type of teeth

1. Canine                   

2. Premolars

3. Molars                   

4. Incisors

Which of the folowing teeth are lophodont ?

1. Incisor and canine

2. Canine and premolar

3. Premolar and molar

4. Premolar and incisor

In mammals, the teeth are.
I. only two sets, present throughout life.
II. embedded in the socket of the jaw bones.
III. different types.

These conditions are respectively referred as
1. diphyodont, heterodont and thecodont
2. diphyodont, thecodont and heterodont
3. the codont, diphyodont and heterodont
4. the codon, heterodont and diphyodont

Our teeth are:

(1) Acrodont and homodont                  

(2) Homodont and polyphyodont

(3) Thecodont, diphyodont and heterodont

(4) Acrodont, homodont and polyphyodont

Frenulum is:

1. Adenoid present on pharyngeal wall

2. Tonsils located on lateral wall of soft palate

3. Fold attaching tongue to the floor of oral cavity

4. V-shaped sulcus for terminalis on tongue

The hard chewing surface of teeth helping in mastication of food is called:

1. Dentine

2. Frenulum

3. Root

4. Enamel

Which of the following statements are not wrong?