MFDS Oral Biology 2

Question 1

Which growth factor is most critical for the initiation of tooth development?

Accepted Answer

FGF-8

Answer

TGF-β1

Answer

BMP-4

Answer

EGF

Question 2

The epithelial cell rests of Malassez are remnants of which structure?

Accepted Answer

Hertwig's epithelial root sheath

Answer

Dental lamina

Answer

Enamel organ

Answer

Reduced enamel epithelium

Question 3

What is the approximate pH at which enamel begins to demineralise?

Accepted Answer

5.5

Answer

4.0

Answer

6.2

Answer

7.0

Question 4

Which component of saliva provides the primary antimicrobial defence against oral bacteria?

Accepted Answer

Secretory IgA

Answer

Amylase

Answer

Mucin

Answer

Lactoferrin

Question 5

Which stage of tooth development is characterised by proliferation of the enamel organ into a cap shape?

Accepted Answer

Cap stage

Answer

Initiation

Answer

Bud stage

Answer

Bell stage

Question 6

What is the primary function of the stratum intermedium in the developing tooth?

Accepted Answer

Support of ameloblast function

Answer

Secretion of enamel matrix proteins

Answer

Formation of root sheath

Answer

Production of dentine