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DHE 121 Week 13 Periodontium

Total questions: 62

Worksheet time: 53mins

Name
Class
Date
1.

The periodontium includes:

a)

Cementum

b)

Pulp

c)

PDL

d)

Alveolar process

2.

(a)   seals the dentinal tubules.

3.

Cementum anchors teeth to bone via the (a)   .

4.

1. Cementum is vascular.


2. Cellular cementum forms throughout the life of the tooth, and is the 3rd hardest tissue in the body.

a)

First statement true, second false

b)

First statement false, second true

c)

Both true

d)

Both false

5.

Cementum gets nutrition from the:

(a)  

6.

Cementum is by weight _____% inorganic material , _____% organic material, ______% water.

a)

65, 20, 10

b)

65, 23, 12

c)

68, 24, 12

7.

Crystalline formation of mature cementum consists of:

a)

Calcium hydroxyapatite

b)

Carbon hydroxyapatite

c)

Zinc hydroxyapatite

d)

Cadmium hydroxyapatite

8.

_________ cementum forms first. At least one layer of the ________ cementum covers the entire outer surface of each root .

(a)  

9.

(a)   cementum forms throughout life, and is deposited mainly in the apical 1/3 of each root.

10.

What type of cementum is this?

(a)  

11.

What type of cementum is this?

(a)  

12.

What % of people have a pattern that overlaps the CEJ? It can be mistaken for calculus.

(a)  

13.

What % of people have a pattern that meets the CEJ?

(a)  

14.

What % of people have a pattern that has a gap at the CEJ? These patients will experience sensitivities.

(a)  

15.

This is the excessive production of cellular cementum, which mainly occurs at the apex or apices of the tooth.

(a)  

16.

(a)   are mineralized spherical bodies of cementum found either attached to the cemental root surface or lying free in the PDL.

17.

Alveolar process is by weight _____% inorganic material , _____% organic material, ______% water.

a)

60, 20, 15

b)

60, 25, 15

c)

60, 30, 15

18.

The green area depicts the:

a)

Cribifrom plate

b)

Cancellous bone

c)

Cortical bone

19.

The red arrows are pointing to the:

(a)  

20.

The red arrows are pointing to the:

(a)  

21.

The red arrow depicts the (a)   septum of cancellous bone.

22.

The green lines depict the (a)   septum of cancellous bone.

23.
a)

Interdental septum

b)

Interradicular septum

24.

a)

Interdental septum

b)

Interradicular septum

25.

In regards to bone remodeling from orthodontics, what type of bone cells will you see in the compression zone?

(a)  

26.

In regards to bone remodeling from orthodontics, what type of bone cells will you see in the tension zone?

(a)  

27.
a)

Diagnosis: Fenestration

Cause: osteoblast malfunction during bone devt. in the cortical bone area

Stage: alveolar bone development

Developmental

b)

Diagnosis: Fenestration

Cause: osteoblast malfunction during bone devt. in the cortical bone area

Stage: alveolar bone development

Hereditary

28.

a)

Diagnosis: Dehiscence

Cause: osteoblast malfunction during bone devt. in the marginal cortical bone area

Stage: alveolar bone development

Developmental

b)

Diagnosis: Dehiscence

Cause: osteoblast malfunction during bone devt. in the marginal cortical bone area

Stage: alveolar bone development

Hereditary

29.

Which is NOT a function of the PDL?

a)

Shock absorber

b)

Sensory components

c)

Nutrition to cementum & bone

d)

Formation of ameloblasts

e)

Remodeling

30.

Which is NOT a PDL vascularity component?

a)

Blood cells + lymphatics

b)

Intracellular substance

c)

Fibroblasts

d)

Vascular + nerve supply

e)

Energy supply

31.

The (a)   fiber group is the 1st lost to periodontal disease. It is attached to cementum just below the CEJ, and runs inferior and outward direction to insert into alveolar crest.


Function: resist tilting, intrusive, extrusive, and rotational forces

32.

The (a)   fiber group is located apically to the alveolar crest group and runs perpendicular to the long axis of the tooth.


Function: Stabilizes tipping forces which work to force the tooth to tip M, D, L, F, and to resist rotational forces.

33.

The (a)   fiber group makes up the bulk of the fibers around the roots, and runs in an oblique direction to insert into alveolar bone more coronally.


Function: resist inward + rotational forces.

34.

The (a)   fiber group radiates from cementum around the root apex to surrounding alveolar bone proper, forming base of the alveolus.


Function: resist upward/extrusive + rotational forces

35.

The (a)   fiber group runs from the cementum of one root to cementum of other roots. No bony attachment.


Function: rotational, tilting, lateral forces

36.

Select the alveolodental ligaments.

a)

Alveolar crest

b)

Horizontal

c)

Oblique

d)

Apical

e)

Interradicular

37.

Another principal fiber other than the alveolodental ligament is the (a)   ligament. It inserts mesiodistally into the cervical cementum of neighboring teeth, at a height coronal to the alveolar crest of the ABP and apical to the base of the JE.

38.

The (a)   ligament is a cementum to cementum attachment connecting all the teeth of the arch.


The function of this ligament is to resist rotational forces and hold the teeth in interproximal contact.

39.

Name the alveolodental ligament group.

(a)  

40.

Name the alveolodental ligament group.

(a)  

41.

Name the alveolodental ligament group.

(a)  

42.

Name the alveolodental ligament group.

(a)  

43.

Name the alveolodental ligament group.

(a)  

44.

Name the ligament.

(a)  

45.

The epithelial rests of Malassez are remnants of the (a)   . This can pose a problem resulting in an abscess.

46.

1. The gingival fiber group only supports the marginal gingiva.


2. The functions include: maintaining gingival integrity, anchoring, and protection.

a)

First statement true, second false

b)

First statement false, second true

c)

Both true

d)

Both false

47.

What type of bone has the patient lost between the roots of the molars?

(a)  

48.

What fiber group of the periodontal ligament was the first group to be affected by periodontal disease in this patient?

(a)  

49.

The patient’s loss of cementum, alveolar bone, and periodontal ligament were a part of his/her?

a)

TMJ apparatus

b)

Periodontium

c)

Principal fiber group

d)

Alveolodental ligament

50.

What type(s) of cementum of the posterior teeth was initially lost as a result of the root exposure?

a)

Secondary dentin

b)

Cellular cementum

c)

Cervical enamel

d)

Acellular cementum

51.

The (a)   ligament is missing here.

52.

Which cell population has been active in removing the alveolar bone in the patient?

(a)  

53.

(a)   fibers are very strong collagen fibers from the PDL that are partially inserted into the outer surface of cementum at 90 degrees. They are inserted on the other end into the alveolar process.

54.

Cementum is a hard tissue that is thickest at the tooth's apex or apices and in the interradicular areas of multirooted teeth and thinnest at the (a)   .

55.

The (a)   cementum, also called primary cementum, consists of the 1st layers of cementum deposited at the DEJ, and contains no embedded cementocytes.

56.

The (a)   cementum, also called secondary cementum, is deposited later than primary type and many embedded cementocytes are found within it.

57.

The (a)   is the most cervical rim of the alveolar bone proper.

58.



(a)  

59.

Reversal lines in cementum = resorption


Arrest lines cementum= appositional growth

a)

True

b)

False

60.

The black arrows depict cementoblasts within PDL

arriving to produce new cementum.

a)

True

b)

False

61.

The white arrows are embedded (a)   .

62.

What type of cementum loss is depicted here?

a)

Acellular

b)

Cellular

c)

Both acellular and cellular

d)

None of the above