ORAL ANATOMY - Week 8

The level of the alveolar process, which in healthy periodontium, is located near the cervical margin of the tooth, is referred to as ...

Question 1Select one:

a.

the lamina dura

b.

the cortical plate

c.

the alveolar bone proper

d.

the alveolar crest

d.

the alveolar crest

Canals in bone, through which blood vessels pass into the bone from the outside or from the bone marrow to the inside of bone, are called ...

Question 2Select one:

a.

volkman's canals

b.

lacunae canals

c.

lamellae canals

d.

alveolar foramen

a.

volkman's canals

The inorganic part of bone is composed of

Question 3Select one:

a.

hydroxyapatite

b.

calcium

c.

collagen

d.

lamellae

a.

hydroxyapatite

The function of osteoblasts are to

Question 4Select one:

a.

add new bone

b.

remove bone

c.

add and remove bone

d.

remodel bone by deposition and resorption of bone

a.

add new bone

The compact bone which lines the tooth socket is known as the

Question 5Select one:

a.

alveolar crest

b.

cortical plate

c.

lamina dura

d.

trabeculae

c.

lamina dura

Cells which are responsible for removing bone are 

Question 6Select one:

a.

odontoclasts

b.

osteoclasts

c.

osteoblasts

d.

ameloblasts

b.

osteoclasts

Bone lining the tooth socket is referred to as bundle bone because...

Question 7Select one:

a.

many fibers insert into the bone.

b.

it is radiolucent

c.

it is spongy bone

d.

sharpey's fibres are absent

a.

many fibers insert into the bone

Pain impulses from all periodontal ligaments are carried by cranial nerve ...

Question 8Select one:

a.

One

b.

Three

c.

Five

d.

Seven

e.

Nine

c.

Five

With regard to cementum the letters O.M.G stand for ...

Question 10Select one:

a.

organic matrix of globular dentine.

b.

the response when cold is applied to areas of recession where cementum is absent. 

c.

overlap, meet and gap 

d.

the relationship of cementum to the dentino-enamel junction. 

c.

overlap, meet and gap

Which part of the tooth germ is the primary source for the development of the periodontal ligament?

Question 11Select one:

a.

dental sac

b.

hertwig epithelial root sheath

c.

stratum intermedium

d.

central cells of the dental papilla

a.

dental sac

The width of the periodontal ligament

Question 12Select one:

a.

appears wider near the apex 

b.

is narrowest at the mid-root area. 

c.

becomes wider with age. 

d.

is uniform in thickness in multi-rooted teeth

b.

is narrowest at the mid-root area

The function of cementum is to ...

Question 13Select one:

a.

seal the dentinal tubules on the root surface. 

b.

serve as the attachment for the principal fibers of the periodontal ligament 

c.

provide nutrients to the dentine of the root. 

d.

act as a mechanoreceptor. 

e.

all of the above

f.

a) and b) only

f.

a) and b) only

Cells found within the periodontal ligament space include

Question 14Select one:

a.

osteoclasts

b.

cementoclasts

c.

fibroblasts

d.

macrophages

e.

all of the above

e.

all of the above

Cementum is harder than dentine

Question 15Select one:

True

False

False

Which of the following statements about the lamina dura is not correct? 

Question 16Select one:

a.

The lamina dura is radio-opaque .

b.

The lamina dura represents the alveolar bone proper

c.

The lamina dura is a radiographic feature.

d.

The lamina dura is cancellous bone

d.

The lamina dura is cancellous bone

Select the best description of Sharpey's fibres: 

Question 17Select one:

a.

Fibers of the periodontal ligament space.

b.

Cemental spurs

c.

Bundles of collagen fibers embedded in the alveolar bone proper and cementum.

d.

Resorption of the alveolar crest in periodontal disease

c.

Bundles of collagen fibers embedded in the alveolar bone proper and cementum.

Cementum is composed of hydroxyapatite

Question 18Select one:

True

False

True

What is the condition called when an isolated area of tooth root has no bone covering it?

Question 19Select one:

a.

dehiscence

b.

furcation involvement

c.

gingival recession

d.

exostosis

e.

periapical involvement

a.

dehiscence

Periodontium is

Question 20Select one:

a.

the soft tissues that surround the teeth

b.

the gingiva and the periodontal ligament

c.

soft and hard tissues that surround the teeth

d.

the cementum and the alveolar bone

c.

soft and hard tissues that surround the teeth

Which term is used to describe a lack of attached gingiva?

Question 21Select one:

a.

gingival recession

b.

tooth mobility

c.

probing depths greater than 3mm

d.

mucogingival defect

e.

furcation involvement

d.

mucogingival defect

What is the main component of the periodontal ligament fibres

Question 22Select one:

a.

collagen

b.

elastic

c.

cellulose

d.

keratin

a.

collagen

Hypercementosis involving multiple teeth is associated with which of the following disease processes?

Question 23Select one:

a.

Hyperparathyroidism

b.

Rickets

c.

Oculo-oto-dental syndrome

d.

Gardner syndrome

e.

Paget's disease

e.

Paget's disease

In the adult skeleton

Question 25Select one:

a.

all bone marrow spaces are filled with red bone marrow

b.

bone marrow spaces are filled with red and yellow bone marrow

c.

all bone marrow spaces are filled with yellow bone marrow

b.

bone marrow spaces are filled with red and yellow bone marrow

Bone between the roots of a mult-irooted tooth

interradicular bone

Compact bone lining the tooth socket.

alveolar bone proper

Bone of the maxilla and mandible which does not include the teeth

basal bone

Inner part of bone which is less dense. Also called spongy or cancellous bone

trabecular bone

Outer part of bone which is very dense. Also known as compact bone.

cortical bone

Bone found between the roots of adjacent teeth

interseptal bone