Endodontics II 5 Dr.Khoeung RathVisal

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Endodontics II Quiz

Test your knowledge and skills in endodontics with our comprehensive quiz designed for dental professionals and students. This quiz consists of 50 multiple-choice questions covering various aspects of endodontic treatment and principles.

Prepare for certification or strengthen your understanding with questions like:

Pulpal diagnosis
Root canal therapy principles
Irrigation and disinfection techniques
Base materials and their properties

50 Questions12 MinutesCreated by DrillingTooth101

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

He 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

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

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.

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

Anti-bacteria

Anti-inflammatory

Sedative

Fluoride releasing

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

Anti-bacterial

Anti-inflammatory

Sedative

Well tolerated by the pulp

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

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

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

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

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

Which statement is true?

NaOCl can bind to dentin and remains antimicrobial

Chlorhexidine can bind to dentin and remains antimicrobial

EDTA can bind to dentin and remains antimicrobial

H2O2 can bind to dentin and remains antimicrobial

When chlorhexidine is mixed with EDTA, what will occur?

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

NaOCl will lose its tissue-dissolving capacity.

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

Nothing happens

When chlorhexidine is mixed with NaOCl, what will occur?

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

NaOCl will lose its tissue-dissolving capacity.

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

Nothing happens

MTAD and Tetraclean are a mixture of:

Doxycycline, citric acid, and detergent

Amoxicillin, citric acid, and detergent

Tetracycline, citric acid, and detergent

Clindamycin, citric acid, and detergent

What is the intended use of MTAD?

As the initial rinse before the root canal preparation

As the main irrigant

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

As a lubricant

What are the disadvantages of using irrigants containing doxycycline?

Cause dentin erosion

Toxicity

Antibiotic resistance and tooth staining

Weaken the tooth by making dentin more brittle

Endodontics II 5 Dr.Khoeung RathVisal

Endodontics II Quiz

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