MFDS Oral Biology 3

Question 1

Dead tracts in dentine are caused by:

Accepted Answer

Degeneration of odontoblast processes

Answer

Secondary caries

Answer

Pulp necrosis

Answer

Sclerosis of tubules

Question 2

Which cells phagocytose bone and hard tissue in the periapical region during root resorption?

Accepted Answer

Odontoclasts

Answer

Osteoblasts

Answer

Cementoblasts

Answer

Fibroblasts

Question 3

The incremental lines of von Ebner in dentine represent:

Accepted Answer

Daily growth increments

Answer

Weekly growth increments

Answer

Periods of illness

Answer

Mineralisation fronts

Question 4

Which type of cementum covers the apical third of the root and contains cells?

Accepted Answer

Cellular mixed stratified cementum

Answer

Acellular afibrillar cementum

Answer

Acellular extrinsic fibre cementum

Answer

Cellular intrinsic fibre cementum

Question 5

The principal fibres of the periodontal ligament that run obliquely and are most numerous are the:

Accepted Answer

Oblique fibres

Answer

Alveolar crest fibres

Answer

Horizontal fibres

Answer

Apical fibres

Question 6

Which salivary gland produces the most serous secretion relative to its total output?

Accepted Answer

Parotid

Answer

Submandibular

Answer

Sublingual

Answer

Minor labial glands