Tooth morphology

Question 1

How many teeth in deciduous dentition?

Answer 1

20

Question 2

How many teeth in permanent dentition?

Answer 2

32

Question 3

How does the size of deciduous compare to permanent?

Answer 3

generally smaller

molars are larger than permanent premolars

Question 4

What extra teeth does the permanent dentition have?

Answer 4

premolars

third molars

Question 5

What is the first tooth to erupt in deciduous dentition?

Answer 5

mandibular incisor

Question 6

What is the first tooth to erupt in permanent dentition?

Answer 6

mandibular 1st molar

Question 7

At what age range is there deciduous teeth?

Answer 7

6 months - 12 years

Question 8

At what age range is there permanent teeth?

Answer 8

6 years onward

Question 9

What is the colour of deciduous teeth?

Answer 9

greyish white

enamel colour is more opaque

Question 10

What is the colour of permanent teeth?

Answer 10

yellowish white

enamel colour is less opaque

Question 11

What is the appearance of deciduous teeth?

Answer 11

bulbous

have more pronounced labial and buccal cingula

Question 12

What is the appearance of permanent teeth?

Answer 12

less bulbous

less prominent buccal and labial cingula

Question 13

What is the enamel thickness in deciduous?

Answer 13

0.5-1mm

Question 14

What is the enamel thickness in permanent teeth?

Answer 14

2mm

Question 15

Which dentition is harder and less permeable?

Answer 15

permanent

deciduous is more prone to wear and decay

Question 16

Which dentition has the presence of tmamelons?

Answer 16

permanent

Question 17

Describe the cervical margins in deciduous teeth

Answer 17

more prominent

enamel buying at cervical line rather than tapered smoothly

Question 18

Describe the cervical margins in deciduous teeth

Answer 18

less prominent

Question 19

What is the difference in cusps in permanent and deciduous?

Answer 19

deciduous - sharper

permanent - more rounded

Question 20

What is the difference in pulp chamber in permanent and deciduous?

Answer 20

deciduous - large

permanent - smaller

Question 21

What is the general difference in roots?

Answer 21

deciduous - shorter and less robust

permanent - longer

Question 22

What is the difference in root/crown ratio in both dentition?

Answer 22

deciduous - longer roots in proportion to crown

permanent - less length in proportion to crown

Question 23

What is the difference in the molar roots in both dentition?

Answer 23

deciduous - more divergent roots extend beyond dimension of crown

permanent - less divergent

Question 24

What is the difference in root canal in both dentitions?

Answer 24

deciduous - extremely fine

permanent - patent and well developed