lecture 2

Question 1

characteristic cells of pulp

Answer 1

odontoblasts

Question 2

most common/prevalent cell type in pulp

Answer 2

fibroblasts

Question 3

steps of tooth formation

Answer 3

1. dental lamina
2. bud
3. cap (dental pulp originates)
4. bell

Question 4

cell is unique to the pulp and responsible for dentinogenesis

Answer 4

odontoblast

Question 5

odontoblast produces _____ and proteoglycan matrix which becomes mineralized aka _______. processes extend into tubules

Answer 5

collagen fiber
becomes pre-dentin

Question 6

secreted before root formation:
secreted after root formation:

Answer 6

before: primary dentin
after: secondary dentin [throughout life]

Question 7

fibroblast arises from

Answer 7

undifferentiated ectomesenchymal cell

Question 8

what cell is important for pulp regeneration which elaborates type I and III collagen fibers and ground substances

Answer 8

fibroblast

Question 9

wound healing forms:

Answer 9

tertiary dentin [layered pulpally by fibroblasts]

Question 10

two primary functions of pulp function:

Answer 10

1. induction
2. formative

Question 11

three secondary functions of pulp function:

Answer 11

1. protection
2. defense and repair
3. nutrition

Question 12

principle sensory innervation of pulp of Max and Mand Pulp

Answer 12

trigeminal nerve V2 and V3

Question 13

additional premolar innervation may come from

Answer 13

mylohyoid nerve

Question 14

what is the sympathetic (motor) innervation for pulp

Answer 14

T1 and T2 via superior ganglion

Question 15

relatively low stimulation threshold, quicker response.
sharp, pricking

Answer 15

a fibers: Myelinated
THINK ACUTE

Question 16

relatively high stimulation threshold, slow in onset (late).
dull, aching, and more diffuse less bearable pain

Answer 16

c fibers: Unmyelinated
chronic
irreversible pulpitis

Question 17

90% of a fibers are:

and largest a fibers are:

Answer 17

90% a delta fibers
largest a alpha fibers

Question 18

anything that causes movement of the fluid with in the dentinal tubules causes pain in the pulp

Answer 18

Branstromm’s Hydrodynamic Theory

Question 19

common etiologies of pulp irritation:

Answer 19

microbiological, mechanical, chemical, trauma

Question 20

“portals of access” of microbiological irritants examples are:

Answer 20

-cracked or fractured tooth
-cemental defect at CEJ
-open dental tubules
-perio invasion into apex
-pulpal invasion in PA
-lateral or accessory canals

Question 21

the #1 threat to health of the dental pulp is

Answer 21

dental caries

Question 22

pulp polyp; when pulp grows out of tooth; doesn’t hurt and can’t heal.

Answer 22

hyperplastic pulpitis

Question 23

cutting with insufficient coolant causes:

Answer 23

aspiration of odontoblasts into tubules
[always use water]

Question 24

excessive air drying of exposed dentin:

Answer 24

aspiration

Question 25

application of desiccants:

Answer 25

alcohol, chloroform, cavit, etc

Question 26

application of any irritating or toxic element to the pulp or dentinal tubules may cause pulpal injury:

Answer 26

direct pulp cap or indirect pulp cap
disinfecting agents
acidic preparations
composites

Question 27

combo of secondary and tertiary dentin formation in response to extensive and chronic injuries before the pulp became necrotic

Answer 27

calcific metamorphosis

Question 28

function of ondontoblasts is to create

Answer 28

tooth structure