Anatomy of the Periodontium pt. 2

Question 1

Cementum

Answer 1

• Calcified connective tissue covering the roots of the teeth

Question 2

Least mineralized of the calcified tissues of the tooth

Answer 2

Cementum

Question 3

Cementum
fxn

Answer 3

to attach fibers of the PDL to the tooth (like cement)

Question 4

Cementum
blood & lymph vessels

Answer 4

No blood, lymph vessels of innervation noted

Question 5

Cementum
Continuously deposited in the — area of the root throughout life

Answer 5

apical

Question 6

Functions of the
Periodontal Ligament (PDL)

Answer 6

Supportive
Formative
Nutritive
Sensory

Question 7

Supportive:

Answer 7

anchors tooth to bone
• Sharpey’s fibers: portion of PDL that insert into bone
and cementum

Question 8

Formative:

Answer 8

helps maintain biologic activity of bone and
cementum

Question 9

Nutritive:

Answer 9

supplies nutrients and removes waste products
via blood and lymph vessels

Question 10

Sensory:

Answer 10

capable of transmitting tactile pressure and pain
sensations

Question 11

PDL width (seen only in
radiographs) depends on (4)

Answer 11

age,
stage of eruption, function of
tooth, and angle of film

Question 12

Alveolar Bone
(Alveolar Process)

Answer 12

• Bone that forms and supports the alveoli (tooth
sockets)

Question 13

Alveolar Bone
(Alveolar Process)
Consists of (2)

Answer 13

alveolar bone proper and supporting bone

Question 14

Alveolar Bone
(Alveolar Process)
• Contour of the alveolar bone follows contour of the

Answer 14

CEJ and arrangement of the dentition

Question 15

Alveolar Bone
(Alveolar Process)
• Shape of the alveolar crest is generally — to the
CEJ of adjacent teeth; approximately —mm apical
to the CEJ

Answer 15

parallel
1.5-2

Question 16

Alveolar Bone
(Alveolar Process)
• Cortical plates are usually thicker in the

Answer 16

mandible than
in the maxilla

Question 17

Alveolar Bone
Proper

Answer 17

Thin layer of bone that surrounds
the root and gives attachment to the
PDL

Question 18

Alveolar Bone
Proper
• Termed — in radiographic
images

Answer 18

lamina dura

Question 19

Alveolar Bone
Proper
• Also termed —

Answer 19

cribiform plate

Question 20

Supportive
Alveolar Bone
(3)

Answer 20

• Portion of alveolar process that surrounds the alveolar bone proper and gives support to the sockets
• Compact (cortical)
• Cancellous or trabecular (spongy) bone