Endo2

Question 1

Which of the following are NOT found in the pulp?
• reticulin fibers
• collagen fibers
• unmyelinated nerve fibers
• myelinated nerve fibers
• proprioceptor nerve fibers

Answer 1

proprioceptor nerve fibers

Question 2

The myelinated fibers of pulp are ?, and the unmyelinated fibers are ?

Answer 2

• sensory (only the free nerve ending)

* motor

Question 3

Pulp stones are associated with ?

Answer 3

chronic pulpal disease — from advanced carious lesions or large restorations

Question 4

The absence of which layer of dentin predisposes it to internal resorption by cells present in the pulp?
• mantle dentin
• circumpulpal dentin
• predentin
• secondary dentin
• tertiary dentin

Answer 4

predentin (Immediately adjacent to the odontoblast layer in the pulp, remain unmineralized)

Question 5

? dentin represents most of the dentin that is formed.

Answer 5

Circumpulpal

Question 6

Remember: ? is the primary function of pulp

Answer 6

Dentin formation

Question 7

The ? in the apical portion of the pulp helps to form the pulp into a semisolid mass, facilitating a ?.
• collagen, pulpectomy
• network of capillaries and nerves, pulpectomy
• collagen, pulpotomy
• network of capillaries and nerves, pulpotomy

Answer 7

collagen, pulpectomy

Question 8

which type of collagen is present in the pulp and dentin?

Answer 8

• pulp: Type I and Type III mainly and a little type V
• dentin: Type I
Odontoblasts synthesize Type I, while fibroblasts in the pulp synthesize both Type I and III.

Question 9

The pulp lacks ?, which severely limits its ability to cope with bacteria, necrotic tissue, and inflammation

Answer 9

collateral circulation

Question 10

A patient walks into your office holding a cup with a tooth in it. What liquid would you LEAST hope the patient kept the tooth in?
• milk
• water
• saliva
• saline

Answer 10

water (milk is the best)

Question 11

Which of the following situations may be indications for intentional replantation? Select all that apply.
• when routine endodontic therapy is impractical
• when a canal is obstructed
• when perforating internal or external resorption is present
• when previous treatment has failed

Answer 11

• when routine endodontic therapy is impractical
• when a canal is obstructed
• when perforating internal or external resorption is present
• when previous treatment has failed

Question 12

Hemisection means ?

Answer 12

Bicuspidization with one root extracted on lower molars

Question 13

The main benefit of primary incisor replantation is:
• maintenance of a normal anterior dentition
• to relieve parental guilt
• to maintain child’s self-esteem
• to maintain child’s social acceptance

Answer 13

maintenance of a normal anterior dentition

Question 14

Proper management of an avulsed permanent tooth that has been replanted within 1 hour of the accident:?

Answer 14

• 10 days to 2 weeks after replantation, the root canal is prepared (cleaned and shaped) and a calcium hydroxide paste is placed into the canals
• This paste is replaced every 3 months for 1 year
• If after 1 year, it appears that resorption has reversed or stopped, obturation with gutta percha filling can be done

Question 15

? is the most frequent sequela to replantation

Answer 15

Resorption

Question 16

Replacement resorption refers to resorption of the root surface and its substitution by bone, resulting in ?

Answer 16

ankylosis

Question 17

Internal resorption of a tooth is generally believed to be caused by inflammation due to an infected coronal pulp.
This condition is frequently precipitated by traumatic injury to the tooth.
• both statements are true
• both statements are false
• the first statement is true, the second is false
• the first statement is false, the second is true

Answer 17

both statements are true

Question 18

“The external resorption in which an infected pulp may further complicate the resorptive process,” is termed as:
• surface resorption
• inflammatory resorption
• replacement resorption

Answer 18

inflammatory resorption

Question 19

Surface resorption is caused by ?. It is very common, ?. If injury is not repeated, healing takes place with new cementum and PDL. Root surface resorption is limited to cementum, may heal itself, and is not radiographically visible

Answer 19

• acute injury to the PDL and root surface

* self-limiting, and reversible

Question 20

Replacement resorption (ankylosis) is often seen in ?

Answer 20

unsuccessful replant cases

Question 21

etiology of internal resorption?

Answer 21

Internal resorption: dental trauma (resulting in loss of vitality and subsequent infection), dental caries, pulp capping with calcium hydroxide, cracked tooth

Question 22

Which of the following is NOT a key feature of replacement resorption?
• lack of mobility
• lack of PDL on x-ray
• pink appearance
• infraocclusion

Answer 22

pink appearance (it is considered pathognomonic of internal resorption)