Endodontics

Endodontics Quiz

Test your knowledge on endodontics with our comprehensive quiz that covers a range of topics including diagnosis, treatment methods, and vital pulp testing. This quiz is designed for dental professionals and students looking to enhance their understanding of endodontic principles.

Multiple choice questions
Assess your diagnostic skills
Learn about pulp vitality testing

60 Questions15 MinutesCreated by ExaminingTooth42

Which serve as initial important clue to make a correct diagnosis?

Health questionnaire

Chief complaint

Clinical sign and symptoms

Radiograph

For medical history, the clinician should evaluate a patient’s response to the health questionnaire from two perspectives:

Those medical conditions and current medications that will necessitate altering the manner in which dental care will be provided and those that may have oral manifestations or mimic dental pathosis.

Those medical conditions and current medications that will not necessitate altering the manner in which dental care will be provided and those that may have oral manifestations or mimic dental pathosis.

Those medical conditions and current medications that the patient is suffering or taking now and those that may have oral manifestations or mimic dental pathosis.

Those medical conditions and current medications that will not necessitate altering the manner in which dental care will be provided and those that may mot have oral manifestations or mimic dental pathosis.

Which medical condition may not mimic dental pathosis?

Trigeminal neuralgia

Acute maxillary sinusitis

Sickle cell anemia

Endocarditis

�Can you point to the offending tooth?” is the question regarding to:?

Provocation and attenuation

Localization

Commencement

Intensity

Which of the following tests is used to detect the periapical status?

Palpation

Probing

Selective anesthesia

Transillumination

Which of the following tests is mainly use to detect cracks?

Transillumination

Cavity test

Radiograph

Percussion

Which of the following tests is used to detect pulp vitality?

Selective anesthesia

Thermal test

Bite test

Staining

Which of the following tests is usually used in cases where the patient cannot locate the source of pain properly?

Bite test

Selective anesthesia

Percussion

Palpation

Which of the following tests is used detect periodontal status?

Palpation

Percussion

Mobility test

Bite test

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

Immature apex

Calcific obliterations in the root canals

Recently traumatized teeth

Partial pulp necrosis

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

Anxious patient

Poor contact of pulp tester to tooth

Immature apex

Drugs that increase patient’s threshold for pain

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

Contact with metal restoration

Partial pulp necrosis

Immature apex

Ineffective tooth isolation

Which device test pulp vitality based on the determination of blood flow?

Electric pulp tester

CBCT

Transillumination

Pulp oximetry

Which material cannot be used to do a cold test?

Dry ice

Refrigerant

Cool GP

Regular ice

Which material cannot be used to do a heat test?

Rubber wheel

Hot water

Heated GP

Chloroform

Which test directly stimulates the dentin?

Cold test

Heat test

Cavity test

Electric pulp test

Which one is not a usual characteristic of periapical lesions of pulpal origin as seen radiographically?

The lamina dura is lost apically

The lucency changes its position related to the apex according to the shift of cone angle

The lucency tends to resemble a hanging drop

Usually a cause of the pulp necrosis is present

Extensive diffuse calcification as seen radiographically is indicative of:

Long-term low-grade irritation but not necessarily of irreversible pulpitis

Irreversible pulpitis with dentinoclastic activity

Previous trauma to the tooth

Severe irritation and irreversible pulpitis

Canal obliteration as seen radiographically is usually indicative of:

Long-term low-grade irritation but not necessarily of irreversible pulpitis

Irreversible pulpitis with dentinoclastic activity

Previous trauma to the tooth

Severe irritation and irreversible pulpitis

Which statement is true about digital radiograph?

Give a better image than that obtained from film

Need higher dose of radiation than film

Can be manipulated

Take longer time to process than film

The patient has no spontaneous pain and responds normally to pulp testing and percussion. However, radiographically, there are some pulpal calcifications but no evidence of resorption, caries, or mechanical pulp exposure. The pulpal diagnosis of this case is:

Asymptomatic irreversible pulpitis

Normal pulp

Reversible pulpitis

Symptomatic Irreversible Pulpitis

The patient complains of pain upon drinking cold drinks, but the pain disappears immediately after the stimulation is over. The tooth response normally to pulp and periapical tests. Radiographically, there is no periapical change but caries can be seen approaching the pulp chamber. What is the likely pulpal diagnosis of this case?

Normal pulp

Reversible pulpitis

Symptomatic Irreversible Pulpitis

Asymptomatic irreversible pulpitis

The patient has no any symptoms and response normally to both pulp and periapical test. However, the radiograph shows the caries extend well into the pulp. So, what is the likely pulpal diagnosis of this case?

Normal pulp

Reversible pulpitis

Symptomatic Irreversible Pulpitis

Asymptomatic irreversible pulpitis

The patient reports spontaneous pain and responses with extreme pain to cold test. Periapical tests give a normal response, and the radiograph also shows normal periapical structure. The pulpal diagnosis of this case would be:

Normal pulp

Reversible pulpitis

Symptomatic Irreversible Pulpitis

Asymptomatic irreversible pulpitis

What is the treatment of asymptomatic irreversible pulpitis?

Pulp capping

Pulpotomy

Pulpectomy

No treatment is required

Cavity and crown preparation should be carried out:

Without water spray to improve visibility

With dull burs as this is safer than the sharp ones

With ultraspeed

High-torque handpiece

At which speed is it safe to prepare a vital tooth without water?

At 3000 rpm or lower

At 4500 rpm or lower

At 6000 rpm or lower

At 9000 rpm or lower

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

Because it is too slow

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

Because it is hard to handle

Because it cannot be used with water spray

Bent burs should be discarded because:?

Burs are not expensive

They may vibrate or rotate eccentrically

They can be fractured during the cavity preparation

They become dull and cannot cut dentin efficiently

Which material should be used for cleansing dentin surface?

Alcohol

Detergent

Water spray

Disinfectant

After cleansing, the dentin surface should be:

Dried thoroughly using a strong air blast

Dried using shorts blasts of air and cotton pellet

Left to dry by itself

Left wet

Base materials are used for two reasons:

To protect the pulp from harmful components in a filling material and from marginal leakage, and to influence the repair processes in the pulp to enhance healing.

Because they are cheaper than filling materials, and they are easily handled

To bond filling materials to the tooth structure, and to protect the pulp from harmful components in those filling materials.

To bond filling materials to the tooth structure, and to influence the repair processes in the pulp to enhance healing.

Two main types of base materials are:

GIC and MTA

MTA and Ca(OH)2

ZOE and Ca(OH)2

ZOE and GIC

Zinc-oxide eugenol cement has all the following properties except one which is:?

Anti-bacterial

Anti-inflammatory

Sedative

Fluoride releasing

Which material cannot be used as a base for composite restoration?

MTA

GIC

ZOE

Ca(OH)2

Ca(OH)2 has all the following properties except one which is:

Anti-bacterial

Anti-inflammatory

Sedative

Well tolerated by the pulp

Which material has fluoride–releasing property?

MTA

GIC

ZOE

Ca(OH)2

Which statement is true about the indications of root canal therapy (treatment of non-vital teeth)?

Root canal therapy is only indicated when the periapical lesion size is small

Root canal therapy is only indicated when the periapical lesion is small to medium in size

Root canal therapy is indicated in all non-vital teeth regardless of the periapical lesion size.

Root canal therapy is not indicated when the periapical lesion size is large

Which of the followings is not one of the treatment principles of root canal therapy?

Chemomechanical instrumentation to remove necrotic tissue and bacteria

Disinfection of the root canals

Providing space for post placement

Obturation to prevent re-infection

The main role of mechanical instrumentation is to:?

To physically remove the necrotic tissue, its colonies bacteria and most bacteria in the dentinal tubules.

To remove the smear layer

To clean out debris and dentinal shavings

To remove necrotic tissue in lateral canals

The effects of mechanical instrument are enhanced by all of the following properties of root canal irrigation except one:?

Removing smear layer

Dissolving necrotic tissue remnants, especially in areas where the instruments cannot reach

Exerting antibacterial effect

Removing infected dentin

At present, which material should be used for root canal disinfection?

Eugenol

Paraformaldehyde

Rockle

Ca(OH)2

When should we obturate the instrumented root canals?

When the patient is asymptomatic and the root canal is dry

When the patient is asymptomatic but the root canal is wet

When the patient is symptomatic but the root canal is dry

When the patient is symptomatic and the root canal is wet

Which is the most commonly used irrigant?

EDTA

Chlorhexidine

NaOCl

H2O2

Which irrigant has tissue-dissolving ability?

EDTA

Chlorhexidine

NaOCl

H2O2

Which irrigant can remove smear layer?

EDTA

Chlorhexidine

NaOCl

H2O2

In case of NaOCl allergy,

Chlorexidine should be used instead

Saline should be used instead

H2O2 should be used instead

Iodine potassium iodide (IKI) should be used instead

How to improve the tissue-dissolving capacity of NaOCl?

Warm it

Cool it

Lower the concentration

No means to do that

NaOCl is used in concentrations between:

O.1% to 0.5%

0.5% to 6%

6% to 10%

10% to 15%

Which one has the most tissue-dissolving ability?

0.5% NaOCl

2.5% NaOCl

5.25% NaOCl

10% NaOCl

Which one is the less toxic?

0.5% NaOCl

2.5% NaOCl

5.25% NaOCl

10% NaOCl

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

They should be used as sparingly as possible.

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

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

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

Which statement is true about the working time of NaOCl?

NaOCl remains active in the root canal for a very long time, so we can use it as an intracanal medication

NaOCl remains active in the root canal for quite a long time, so there is no need to replenish it during the root canal preparation

NaOCl remains active in the root canal for quite a long time, but we need to replenish it 2 or 3 times during the root canal preparation

NaOCl remains active in the root canal for a very short time, so there is a need to replenish it frequently during the root canal preparation

In endodontics, EDTA is normally used at which concentration?

15%

17%

Which statement is not true about EDTA?

An increase in the temperature of EDTA is desirable.

Longer exposure time to EDTA may cause dentin erosion.

EDTA can remove the smear layers when in direct contact with the root canal wall for less than 1 minute.

EDTA removes the mineralized portion but not the organic portion of the smear layer.

When EDTA is mixed with NaOCl, what will happen?

Brownish-orange precipitate containing parachloroaniline (PCA), which is toxic and mutagenic, is formed.

NaOCl will lose its tissue-dissolving capacity.

White precipitate is formed, and the ability of EDTA to reduce the smear layer is reduced.

Nothing happens

Which of the following statements is true?

Use of NaOCl as the final rinse following EDTA is desirable.

Use of NaOCl as the final rinse following EDTA should probably be avoided as this causes dentin erosion.

Use of NaOCl as the final rinse following EDTA is neither desirable nor prohibited.

Use of NaOCl as the final rinse following EDTA is fine, but chlorhexidine may be better than NaOCl as a final rinse.

The properties of chlorhexidine are as follows except one:

No tissue-dissolving capability

Lower toxicity than NaOCl

No bad smell

No reduced activity in the presence of organic matter

CHX is normally used at concentrations between:

O.01% and 0.12%

0.12% and 2%

2% and 5%

5% and 10%

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