Histology of Pulp and PA Tissues

Question 1

Characteristic cells of the pulp?

Answer 1

odontoblasts

Question 2

Most common/prevalent cell type in pulp?

Answer 2

fibroblasts

Question 3

Primary function of the pulp organ?

Answer 3

formation
(odontoblasts - dentin)
(ameloblasts - enamel)

Question 4

Secondary functions of the pulp organ?

Answer 4

• supportive
• protection
• sensation
• defense
• repair

Question 5

Fibroblasts arise from?

Answer 5

undifferentiated ectomesenchymal cells

Question 6

Odontoblasts are responsible for?

Answer 6

dentinogenesis

Question 7

Pain in pulp best described by what theory?

Answer 7

Hydrodynamic theory - anything that causes movement of the fluid within the dentinal tubules causes pain in the pulp

Question 8

Type of dentin as the root of a tooth is developing?

Answer 8

primary dentin

Question 9

Type of dentin that reduces size of the pulp, but retains the general form as the tooth matures?

Answer 9

secondary dentin

Question 10

Type of dentin that is formed in response to injury, in which the general form of the pulp is altered?

Answer 10

tertiary (reparative) dentin

Question 11

T/F: Formation and deposition of secondary and tertiary dentin can occur even if pulp is necrotic.

Answer 11

False; pulp must be VITAL for there to be deposition

Question 12

PCO

Answer 12

pulp canal obliteration

Question 13

Calcific metamorphosis can be caused by?

Answer 13

pulp sclerosis or dystrophic calcification

Question 14

The pulp is amazingly resilient if covered by how much healthy dentin?

Answer 14

0.5mm; reasonable trauma can be survived if bacteria are minimized/eliminated

Question 15

Many etiologies of pulpal damages are iatrogenic. What is an example?

Answer 15

heating of pulp with a bur; cutting with insufficient coolant

Question 16

Common etiologies of pulp irritation include?

Answer 16

• microbiological
• mechanical
• chemical
• trauma

Question 17

The #1 cause of pulpal injury is? (category)

Answer 17

microbiological

Question 18

The #1 threat to health of the dental pulp is?

Answer 18

dental caries

Question 19

The most common portal of access for microbiological irritants are?

Answer 19

caries and leaking restorations

Question 20

Two types of trauma that can irritate pulp (and examples).

Answer 20

• external (falls and sports accidents)
• internal (paranormal habits, such as bruxism)

Question 21

Type of necrosis that occurs when pulp is bacteria free?

Answer 21

coagulative necrosis