Endodontics II Test

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Endodontics II Test

1 / 60

In case of pulp necrosis with localized swelling, how can we do to induce the drainage through the root canals if it does not occur spontaneously?

a. Aspirate using a syringe with a small needle

b. Penetrate the apical foramen with small files (up to 25). `

c. Press the swollen area to force the pus out through the root canals

d. Ask the patient to rinse with warm salt water for a few minutes.

2 / 60

When should spreader or plugger be selected?

a. Just before the obturation

b. During the obturation

c. During the cleaning and shaping phase

d. Before the cleaning and shaping phase

3 / 60

For patients with severe endodontic infections but not life-threatening and given that they are not allergic to penicillin, which antibiotic should be used?

a. Augmentin

b. Azithromycin

c. Clindamycin

d. Amoxicillin

4 / 60

What is the intended use of MTAD?

a. As a final rinse to disinfect the root canal system and remove the smear layer

b. As the initial rinse before the root canal preparation

c. As a lubricant

d. As the main irrigant

5 / 60

When should metronidazole be prescribed in addition to penicillin?

a. When there is only a mild indication of systemic antibiotic therapy

b. Whenever possible.

c. When the patient is allergic to Augmentin

d. When the patient’s condition is not improving after 72 hours of taking only penicillin.

6 / 60

Which solution is used to disinfect the operating field after rubber dam placement?

a. EDTA

b. 5% iodine tincture

c. Citric acid

d. 30% hydrogen peroxide

7 / 60

Which one of the following conditions can make an electric pulp tester get a false-negative result?

a. Contact with metal restoration

b. Partial pulp necrosis

c. Ineffective tooth isolation

d. Immature apex

8 / 60

Healing of apical periodontitis may occur as scar tissue. This is particularly true in:

a. Young patients

b. Elderly patients

c. Adult patients

d. Female patients

9 / 60

Which motion is best used to negotiate the root canal with small files to length?

a. Reaming motion

b. Balanced force motion

c. Turn and pull motion

d. Watch winding motion

10 / 60

Causes of endodontic failures include:

a. Coronal leakage

b. Anatomy

c. All of above

d. Inadequacies in cleaning, shaping and obturation

11 / 60

Which method is helpful in determine the working length of an immature tooth?

a. Moisture on a paper point

b. Electronic apex locator

c. The use of anatomical averages and knowledge of anatomy

d. Tactile sense

12 / 60

Which one is the less toxic?

a. 0.5% NaOCl

b. 10% NaOCl

c. 2.5% NaOCl

d. 5.25% NaOCl

13 / 60

Why do we usually need to resect the root end for apical surgery?

a. Because the root end is not important in term of crown/root ratio

b. To provide a convenient access to the root canal for the apical instrumentation

c. Because the root end is usually curve lingually/palatally that it is hard to see the apical foramen.

d. Because the root end is rich of dentinal tubules.

14 / 60

The clinical implication of pulp stones is:

a. Nothing

b. The larger the pulp stone, the more likely it may block access to canals or the root apex

c. The larger the pulp stone, the more painful the tooth will become

d. The presence of pulp stones helps clinicians in making an accurate diagnosis.

15 / 60

Which analgesics should be used for mild pain?

a. Ibuprofen alone

b. Combination of acetaminophen and codeine

c. Combination of acetaminophen and oxycodone

d. Combination of ibuprofen and hydrocodone

16 / 60

ក្នុង Patient’s Complaint គ្រូពេទ្យត្រូវ

a. Ask some question to patient

b. Listening and record patient words.

c. Taking action to patient

d. All of above

17 / 60

Anachoresis is:

a. The infection via exposed dentin at the cervical area

b. The infection via blood circulation

c. The infection via caries

d. The Infection via accessory canals from periodontal pocket

18 / 60

The ideal length of RCT is,:

a. 0.5 to 2 mm before apex

b. 0.5 t0 1.5 mm before the apex

c. As far as you can obturate

d. At the apex

19 / 60

In case of retreatment, when should a crown be kept?

a. Should never be kept, as it can lead to perforation by trying to access through the crowns.

b. Whenever we can make a good access through the crown.

c. Should always be kept, as the crown itself is not the cause the endodontic failure.

d. When the crown is satisfactory in both function and esthetic.

20 / 60

Which of the followings is not one of the methods used to determine the working length?

a. MRI

b. Tactile sense

c. Radiograph

d. Moisture on a paper point

21 / 60

អ្វីជាជំរើសទីមួយសំរាប់ pulp capping

a. Glass Ionomar

b. Calcium Hydroxide

c. Bonding adhesive

d. Zinc Oxide Eugenol

22 / 60

Why high-torque handpiece should only be used for detail work and to excavate carious soft dentin?

a. Because it cannot be used with water spray

b. Because it leads to bur vibration which may cause internal bleeding of the pulp.

c. Because it is too slow

d. Because it is hard to handle

23 / 60

Single visit root canal treatment is indicated in case of:

a. Asymptomatic irreversible pulpitis with apical periodontitis.

b. Symptomatic irreversible pulpitis with apical periodontitis.

c. Symptomatic irreversible pulpitis without any apical changes

d. Necrotic pulps with apical abscess.

24 / 60

Dental history taking:

a. Focuses heavily on the quality of pain

b. Is less important than X- Ray examination

c. Assesses intensity of pain

d. Has it principal goal to identify the offending tooth

25 / 60

Which of the following stimuli can be considered as non-destructive?

a. Dental caries

b. Limited elastic deformation of dentin due to a sudden heavy load on the tooth

c. Pulp exposure due to operative procedure

d. Traumatic injuries

26 / 60

Which of the following cases may undergo flare up after single visit endodontic treatment:

a. Symptomatic irreversible

b. Asymptomatic apical periodontitis

c. Chronic apical abscess.

d. Asymptomatic irreversible pulpitis.

27 / 60

Which one of the following conditions can make an electric pulp tester get a false-positive result?

a. Immature apex

b. Anxious patient

c. Poor contact of pulp tester to tooth

d. Drugs that increase patient’s threshold for pain

28 / 60

Patients presenting with HIV infection, including AIDS:

a. have fewer complications during and after treatment.

b. should be premedicated with analgesics.

c. are at less risk from extraction than from root canal therapy.

d. are at less risk from root canal therapy than from extraction.

29 / 60

Pain on percussion before endodontic treatment indicates

a. Irreversible pulpitis.

b. Inflammation of periodontal tissues.

c. Pulp necrosis.

d. Reversible pulpitis.

30 / 60

24/ How can you identify dentine on the floor of the pulp chamber in a molar?:

a. It is yellow

b. It is grey

c. It is dark brown

d. It is smooth

31 / 60

In case of endodontic failure and the patient has a strong motivation to retain the tooth and pursue best long-term outcome, what should the treatment of choice be?

a. Endodontic Surgery

b. Intentional replantation

c. Extraction and implant placement

d. Orthograde retreatment

32 / 60

Why shouldn’t a tooth with necrotic pulp and some swelling be left open between appointments?

a. Because there is a risk of root canal contamination with other new microorganisms which might be harder to be killed

b. There are more risks of fracture if the access cavity is not temporarily sealed.

c. Because the patient usually does not like his/her tooth to be left open

d. Because this will cause endodontic flare-ups

33 / 60

Give me an example of lubricant products?

a. Glyde

b. CHX-Plus

c. SmearClear

d. MATD

34 / 60

Which solution can be used as an alternative to EDTA?

a. Saline water

b. H2O2

c. Iodine potassium iodide

d. Citric acid

35 / 60

According to “apical box preparation” technique, the apical enlargement of the disto-buccal root of an upper molar should be:

a. Size 40-60

b. Size 30-50

c. Size 50-70

d. Size 60-80

36 / 60

Filing motion is best used with:

a. Reamer

b. Hedstrom file

c. K-file

d. Flexible K-file

37 / 60

In which case should an antibiotic be prescribed?

a. Irreversible pulpitis

b. Pulp necrosis with diffuse swelling

c. Pulp necrosis with localized swelling

d. Pulp necrosis without swelling

38 / 60

How many configurations can apical constriction have?

a. 1

b. 3

c. 4

d. 2

39 / 60

Barbed broaches used for

a. Obturation the canals

b. Estimation working length

c. Removing pulp tissue

d. Enlargement canals

40 / 60

Which color of rubber dam should be used if possible?

a. Yellow

b. White

c. Blue

d. Green

41 / 60

Which one has the most tissue-dissolving ability?

a. 10% NaOCl

b. 5.25% NaOCl

c. 2.5% NaOCl

d. 0.5% NaOCl

42 / 60

If lower concentrations of NaOCl are to be used, how should they be used?

a. They should be used in higher volume but as less frequently as possible.

b. They should be used in higher volume and in more frequent intervals

c. They should be used in the same manner as those of higher concentrations

d. They should be used as sparingly as possible.

43 / 60

If an instrument is broken at the apex of a canal after the root canal preparation is completed of a tooth with a periapical lesion, and the separated instrumented can neither be retrieved nor bypassed, how would the prognosis be like?

a. The case will absolute fail

b. The prognosis should not be affected

c. The prognosis is guarded

d. The prognosis is poor

44 / 60

What is the most common reason to endodontically treat primary teeth?

a. To improve the child’s overall health

b. To improve the child’s self-esteem

c. To prevent the crowding of permanent dentition by maintaining the space.

d. To keep the tooth symptom-free and functional.

45 / 60

A Fourth canal typically found in which of the following:

a. Mandibular premolars.

b. Maxillary first molars.

c. Maxillary second premolars.

d. Maxillary first premolars.

46 / 60

What should we do to unsupported cusps during as well as after endodontic treatment?

a. Protect them with a copper band

b. Leave them as they are

c. Reduce them to avoid fracture

d. Strengthen them with composite

47 / 60

An adequate restoration after an endodontic treatment should have all of the following properties except one which is:

a. The restoration should protect the remaining tooth structure

b. The restoration should satisfy function and esthetics

c. The restoration should provide a coronal seal

d. The restoration should maximize cuspal flexure

48 / 60

Which statement is true about digital radiograph?

a. Need higher dose of radiation than film

b. Can be manipulated

c. Give a better image than that obtained from film

d. Take longer time to process than film

49 / 60

The causes unassociated with dental procedures, there are :

a. All of about

b. Mechanical

c. Bacterial

d. Chemical

50 / 60

Upper first premolars usually have:

a. Four canals

b. One canal

c. Two canals

d. Three canals

51 / 60

Which of the following is not one of the etiologies of pulpitis?

a. Iatrogenic factors

b. Microbial factors

c. Traumatic injuries

d. Hygienic factors

52 / 60

Which dentin is formed during tooth development?

a. Secondary dentin

b. Reparative dentin

c. Primary dentin

d. Tertiary dentin

53 / 60

A patient attends your clinic and has Diabetes, you find that he is in need of endodontic:

a. should not receive elective therapy.

b. should maintain normal insulin and meal scheduled.

c. do well with intracanal steroid therapy.

d. heal as well as nondiabetics.

54 / 60

According to “apical box preparation” technique, the apical enlargement of lower canine should be:

a. Size 50-80

b. Size 40-70

c. Size 30-60

d. Size 60-90

55 / 60

The ideal opportunity for obturation is:

a. When the canal has ceased to exude tissue fluids.

b. When the tooth is symptomatic.

c. Before post cementation.

d. When the canal is free of hemorrhage.

56 / 60

Which instrument should not be rotated?

a. Reamer

b. Non-end cutting flexible K-file

c. Hedstrom file

d. K-file

57 / 60

Which statement is not true about true apical cysts?

a. True apical cysts are completely enclosed in epithelial lining

b. True apical cysts have an opening to the root canal

c. True apical cysts are not likely to heal by orthograde root canal treatment

d. True apical cysts occur more frequently than apical pocket cysts

58 / 60

What is the method to strengthen a thin-walled root?

a. Using composite to fill all the space in the root.

b. Using composite but curing with light transmission post to leave a space for a final post, which will be cemented in place.

c. Fill the composite apical half of the space, and for the coronal half using cast post and core.

d. Taking impression to fabricate a cast post and core to get a good fit with the actual root space.

59 / 60

The push-pull motion is another name of:

a. Reaming motion

b. Watch winding motion

c. Balanced force motion

d. Filing motion

60 / 60

Usually Maxillary First Premolar has

a. All of above

b. Two canals one foramen

c. One canal One foramen

d. Two canals two foramen

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និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត