Tooth Supporting Structures (Killeen)

Question 1

The tooth supporting structures are the ____, ____, and ____

Answer 1

PDL
Cementum
Alveolar bone
- Collectively termed the “Attachment apparatus”

Question 2

The PDL:

Answer 2

Is CT that connects Cementum to Bone
Complex Vascular tissue
Surrounds the tooth
Develops from the dental sac
Narrows with age

Question 3

Principal fibers of the PDL are ____

Answer 3

Sharpey’s fibers (collagen bundles)

Question 4

Alveolar crest fibers extend from ____ to ____ and prevent ____

Answer 4

Cementum
Alveolar crest
Tooth extusion and Resist lateral movement

Question 5

The most numerous fibers of the PDL are the ____ fibers and are the main support of the tooth

Answer 5

Oblique

Question 6

The PDL DOES/DOES NOT contain mature elastin

Answer 6

Does not

Question 7

Cellular elements of the PDL include:

Answer 7

Connective tissue cells
Epithelial rest cells
Immune system cells
Cells of NV elements

Question 8

The most common cell type in the PDL is the ____

Answer 8

Fibroblast (Synthesizes new collagen and Degrade old collagen)

Question 9

Epithelial rests of Malassez are ____

Answer 9

Remnants of Hertwig’s epithelial root sheath

Question 10

Cementicles develop from ____

Answer 10

Calcified epithelial rests

Question 11

The two PDL function theories are the ____ and the ____

Answer 11

Tensional theory

Viscoelastic theory

Question 12

The Tensional theory states:

Answer 12

Principal fibers unfold and straighten to absorb occlusal forces

Question 13

The Viscoelastic theory states:

Answer 13

Displacement of the tooth is controlled by fluid movement (Fibers play a secondary role)

Question 14

The formative function of the PDL involves:

Answer 14

The formation and resorption of cementum and bone

Question 15

The nutritive function of the PDL involves:

Answer 15

BVs to Cementum, Bone, and Gingiva

Lymphatic drainage

Question 16

The dental artery supplies the ____

Answer 16

Dental pulp

Question 17

The interseptal artery supplies the ____

Answer 17

PDL

Question 18

The interdental alveolar arteries supply the ____, and ____

Answer 18

Interdental papillae and adjacent Buccal/Lingual gingiva

Question 19

The ____ arteries anastomose with the PSA, MSA, ASA, IA, Mental, GP, and SL arteries

Answer 19

Interdental alveolar

Question 20

Cementum is ____ tissue

Answer 20

Mesenchymal

Question 21

The first cementum to be formed is ____ cementum

Answer 21

Acellular

Forms before the tooth erupts

Question 22

Cellular cementum is formed ____

Answer 22

After the tooth reaches the occlusal plane

Question 23

Cellular cementum differs from Acellular cementum in that it is/has:

Answer 23

Cells in lacunae
Less calcified than acellular cementum
Fewer Sharpey’s fibers than acellular cementum

Question 24

Cementum permeability ____ with age

Answer 24

Decreases

Question 25

Cementum formation is most rapid in the ____ region

Answer 25

Apical

Question 26

Cementum is thicker of the ____ than the ____

Answer 26

Distal than the Mesial

Question 27

Cementum thickness ____ with age

Answer 27

Increases

Question 28

Paget's disease may correspond to ____

Answer 28

Hypercementosis

Question 29

The origin of cementum:

Answer 29

HERS disintegrates Cementoblast differentiation Cementoid deposition Mineralization (begins at CEJ, moves apically)

Question 30

Cementum and Recession

Answer 30

Apical migration of the JE | Cementum exposed, is permeable, and penetrated by bacteria

Question 31

Which root fractures are repairable?

Answer 31

Horizontal root fractures, as long as they are not exposed to the oral cavity Vertical root fractures are exposed to the oral cavity and are thus non-repairable

Question 32

The ____ is the least stable on all periodontal tissues

Answer 32

``` Alveolar bone (Resorption and formation constantly occurring) ```

Question 33

The Alveolar process is a ____ structure

Answer 33

Tooth-dependent | Disappears after tooth loss

Question 34

A cribriform plate can be found on/in the _____

Answer 34

Alveolar bone proper

Question 35

Bundle bone contains ____

Answer 35

Sharpey's fibers

Question 36

Cancellous bone contains ____

Answer 36

Trabeculae (irregularly shaped marrow spaces)

Question 37

The Periosteum is ____

Answer 37

Layers of differentiated osteogenic CT

Question 38

The interdental space is the ____

Answer 38

Narrow space between the teeth

Question 39

A Fenestration is a "____" in bone

Answer 39

Window | The tooth is covered by periosteum and gingiva

Question 40

A Dehiscence is a ____

Answer 40

V-shaped defect Marginal bone is gone CT attached to cementum