MCQs 216 Endodontic 3dd Dr.Prom Phanarith 1st 2019
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- 1.
Advantages of rubber dam
- A.
Increases visibility and accessibility.
- B.
Psychology
- C.
Easy to work
- D.
Save money
Correct Answer
A. Increases visibility and accessibility.Explanation
The advantage of using a rubber dam is that it increases visibility and accessibility during dental procedures. By isolating the tooth or teeth being worked on, the rubber dam prevents saliva and other fluids from interfering with the dentist's view and access to the area. This allows for better precision and efficiency during treatment, resulting in improved outcomes. Additionally, the rubber dam helps to keep the patient's mouth dry and comfortable, reducing the risk of infection and enhancing the overall dental experience.Rate this question:
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- 2.
Contraindication of direct pulp capping:
- A.
Excess bleeding at the exposure site (uncontrolled bleeding).
- B.
Deep caries
- C.
Pain by cold
- D.
Pain by hot
Correct Answer
A. Excess bleeding at the exposure site (uncontrolled bleeding).Explanation
Direct pulp capping is a dental procedure where a medicament is placed directly on the exposed pulp of a tooth to promote healing and prevent further damage. However, if there is excess bleeding at the exposure site, it can be a contraindication for direct pulp capping. Uncontrolled bleeding can interfere with the proper placement and sealing of the medicament, leading to potential complications and failure of the procedure. Therefore, it is important to control bleeding before attempting direct pulp capping to ensure its success.Rate this question:
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- 3.
Contraindication of rubber dam:
- A.
Recently erupted tooth, Grossly carious teeth, Patiens small mouth
- B.
Recently erupted tooth
- C.
Grossly carious teeth
- D.
Patiens small mouth
Correct Answer
A. Recently erupted tooth, Grossly carious teeth, Patiens small mouthExplanation
The contraindications of using a rubber dam include recently erupted teeth, grossly carious teeth, and patients with a small mouth. Recently erupted teeth may be sensitive and the use of a rubber dam can cause discomfort. Grossly carious teeth may be weak and brittle, making it difficult to properly place the rubber dam. Patients with a small mouth may have limited space, making it challenging to isolate the tooth with a rubber dam.Rate this question:
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- 4.
Disadvantages of technique dam first:
- A.
Chance of dislodgement and aspiration of clamp while placing rubber dam
- B.
Save time
- C.
Small mooth
- D.
Grossly carious teeth
Correct Answer
A. Chance of dislodgement and aspiration of clamp while placing rubber damExplanation
The technique of using a dam first in dental procedures has the disadvantage of an increased chance of dislodgement and aspiration of the clamp while placing the rubber dam. This means that there is a risk of the clamp becoming loose or accidentally being inhaled by the patient. This can lead to complications and potential harm to the patient. Therefore, this disadvantage should be considered when deciding whether to use the dam first technique.Rate this question:
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- 5.
Clinical signs of hyperplastic pulpitis:
- A.
Red pinkish soft nodule protruding into the cavity and Almost children and young adults
- B.
Red pinkish soft nodule protruding into the cavity
- C.
Almost children and young adults
- D.
Polyp gingival
Correct Answer
A. Red pinkish soft nodule protruding into the cavity and Almost children and young adultsExplanation
The clinical signs of hyperplastic pulpitis include the presence of a red pinkish soft nodule that protrudes into the cavity. This nodule is typically seen in children and young adults. Additionally, the presence of a polyp gingival may also be observed in hyperplastic pulpitis.Rate this question:
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- 6.
Contraindication of endodontics:
- A.
Teeth with vertical root resorption and Teeth with external root resorption
- B.
Internal resorption
- C.
Teeth with vertical root resorption
- D.
Teeth with external root resorption
Correct Answer
A. Teeth with vertical root resorption and Teeth with external root resorptionExplanation
Endodontics involves the treatment of the dental pulp and root canal system. Vertical root resorption refers to the loss of tooth structure along the length of the root, while external root resorption refers to the destruction of the root surface by cells outside of the tooth. These conditions can compromise the structural integrity of the tooth and make it difficult or impossible to perform successful endodontic treatment. Therefore, teeth with vertical root resorption and teeth with external root resorption are contraindications for endodontics.Rate this question:
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- 7.
Root canal treatment is :
- A.
Remove the inflamed or infected pulp inside of the canal then fills and seals.
- B.
The process of removing the inflamed pulp tissue from within the tooth.
- C.
The nerve tissue has been taken out and the infection has been eliminated.
- D.
The process of removing the inflame pulp tissue from the chamber.
Correct Answer
A. Remove the inflamed or infected pulp inside of the canal then fills and seals.Explanation
Root canal treatment is a dental procedure that involves removing the inflamed or infected pulp tissue from inside the canal of a tooth. After the pulp is removed, the canal is filled and sealed to prevent any further infection. This treatment is necessary when the nerve tissue has been taken out and the infection has been eliminated.Rate this question:
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- 8.
Why would need an endodontic procedure :
- A.
Remove the inflamed or infected pulp and the tooth continues to function again
- B.
Reduce the pain
- C.
Reduce the swelling
- D.
Root fracture
Correct Answer
A. Remove the inflamed or infected pulp and the tooth continues to function againExplanation
An endodontic procedure is needed to remove the inflamed or infected pulp because the pulp contains nerves and blood vessels that can become infected or inflamed due to deep decay, a cracked tooth, or repeated dental procedures. If left untreated, the infection or inflammation can cause severe pain, swelling, and even lead to the loss of the tooth. By removing the infected or inflamed pulp, the tooth can be saved and continue to function properly.Rate this question:
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- 9.
Early stages of the pulp inflammation can be see:
- A.
Before decay reaches the pulp.
- B.
Deep decay.
- C.
Chip tooth
- D.
Tooth injury
Correct Answer
A. Before decay reaches the pulp.Explanation
The correct answer is "Before decay reaches the pulp." This means that in the early stages of pulp inflammation, the decay has not yet reached the innermost part of the tooth known as the pulp. This suggests that the inflammation may be caused by factors other than decay, such as gum disease or trauma to the tooth. It is important to address this inflammation early on to prevent further damage to the tooth and potential complications.Rate this question:
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- 10.
The pulp’s defense against bacteria is inflammation called :
- A.
Pulpitis
- B.
Pulp necrosis
- C.
Reversible pulpitis
- D.
Irreversible pulpitis
Correct Answer
A. PulpitisExplanation
Pulpitis is the correct answer because it refers to the inflammation of the dental pulp, which is the soft tissue inside the tooth. When bacteria invade the pulp, the body's natural defense mechanism is to initiate an inflammatory response, leading to pulpitis. Pulpitis can be reversible or irreversible, depending on the severity of the inflammation and the extent of damage to the pulp tissue. Pulp necrosis, on the other hand, refers to the death of the pulp tissue due to untreated or advanced pulpitis.Rate this question:
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- 11.
Progression of tooth disease :
- A.
Pulpitis , pulp necrosis and abscess
- B.
Abscess , pulp necrosis and pulpitis
- C.
Pulp necrosis , pulpitis and abscess
- D.
Pulpitis , abscess ,necrosis
Correct Answer
A. Pulpitis , pulp necrosis and abscessExplanation
The correct answer is "Pulpitis, pulp necrosis, and abscess." This is the correct progression of tooth disease. Pulpitis refers to inflammation of the dental pulp, which is the innermost part of the tooth. If left untreated, pulpitis can lead to pulp necrosis, which is the death of the dental pulp. Finally, an abscess can form, which is a pocket of pus caused by a bacterial infection. Therefore, the correct order of events is pulpitis, pulp necrosis, and abscess.Rate this question:
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- 12.
Contraindication for endodontic:
- A.
External root resorption
- B.
Internal root resopi
- C.
Esthetic
- D.
Tooth abscees
Correct Answer
A. External root resorptionExplanation
External root resorption is a contraindication for endodontic treatment because it involves the destruction of the root structure of the tooth. This condition can make it difficult or impossible to properly clean and shape the root canal, leading to a compromised treatment outcome. Additionally, the resorption process can weaken the tooth's structure, making it more prone to fractures during or after the treatment. Therefore, it is important to address the external root resorption before considering endodontic treatment.Rate this question:
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- 13.
Indication for endodontic:
- A.
Traumatic pulp exposure due to dental work
- B.
Vertical root fracture
- C.
External root resorption
- D.
Non restorable teeth after endodontic treatment
Correct Answer
A. Traumatic pulp exposure due to dental workExplanation
Endodontic treatment is indicated for traumatic pulp exposure due to dental work. This means that if the pulp of a tooth is exposed as a result of dental work, such as a cavity preparation or a dental trauma, endodontic treatment is necessary. This treatment involves removing the damaged pulp and replacing it with a filling material to restore the tooth's function and prevent further complications.Rate this question:
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- 14.
Furcation canal គឺជា រន្ធបន្ថែមមានប្រភពចេញពី :
- A.
Floor of pulp chamber
- B.
Pulp horn
- C.
Apex
- D.
Roof of pulp chamber
Correct Answer
A. Floor of pulp chamberExplanation
The furcation canal is an additional canal that originates from the floor of the pulp chamber. It is separate from the main canals and provides an additional pathway for the nerves and blood vessels to exit the tooth. This canal is important to consider during root canal treatment to ensure complete cleaning and filling of all canals in the tooth.Rate this question:
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- 15.
Canal lateral គឺជា រន្ធបន្ថែមមានប្រភពចេញពី :
- A.
Canal principal
- B.
Pulp chamber
- C.
Foramen
- D.
Roof of pulp chamber
Correct Answer
A. Canal principal -
- 16.
Apical delta គឺជា រន្ធបន្ថែមមានប្រភពចេញពី :
- A.
Canal principal ស្ថិតនៅជិត foramen apical
- B.
Pulp horn
- C.
Floor of pulp chamber
- D.
Roof of pulp chamber
Correct Answer
A. Canal principal ស្ថិតនៅជិត foramen apicalExplanation
The apical delta is an additional source of blood supply and nerve innervation in the root apex of a tooth. It is located at the apex of the root and is connected to the main root canal through the apical foramen. Therefore, the correct answer is "Canal principal ស្ថិតនៅជិត foramen apical".Rate this question:
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- 17.
Constriction គឺជារន្ធតូចត្បៀតនៅ:
- A.
Cementum-dentinal junction
- B.
Apical foramen
- C.
Root canal orifice
- D.
Floor of pulp chamber
Correct Answer
A. Cementum-dentinal junctionExplanation
The correct answer is the Cementum-dentinal junction. The Cementum-dentinal junction refers to the boundary between the cementum (a layer of hard tissue that covers the root of a tooth) and the dentin (the hard tissue that forms the bulk of the tooth). This junction is important because it helps to anchor the tooth in the socket and provides a protective barrier against bacteria and other irritants.Rate this question:
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- 18.
Minor foramen គឺជាផ្នែកចំហរដែលនៅជាប់បន្តជាមួយ :
- A.
Constriction apical
- B.
Furcation canal
- C.
Root canal orifice
- D.
Canal lateral
Correct Answer
A. Constriction apicalExplanation
The correct answer is "Constriction apical." This refers to a narrowing or constriction at the apex or tip of the root. It is a common anatomical feature found in teeth and can sometimes pose challenges during root canal procedures.Rate this question:
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- 19.
Major foramen គឺជាផ្នែកចំហរដែលនៅចុងបំផុតនៃ:
- A.
Root of tooth
- B.
Constriction
- C.
Pulp horn
- D.
Floor of pulp chamber
Correct Answer
A. Root of toothExplanation
The major foramen refers to the part of the tooth that is located at the apex or the very end of the root. It is the opening through which nerves and blood vessels enter the tooth. This is different from the other options listed, such as constriction, pulp horn, and floor of pulp chamber, which do not accurately describe the major foramen.Rate this question:
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- 20.
Anatomical apex ស្ថិតនៅចុងនៃ:
- A.
Horn cementum of root
- B.
Furcation canal
- C.
Lateral canal
- D.
Pulp horn
Correct Answer
A. Horn cementum of rootExplanation
The anatomical apex is located at the tip of the horn cementum of the root. The horn cementum is a hard tissue that covers the root of the tooth. The apex is the most distal point of the root and is important for the attachment of the tooth to the surrounding tissues.Rate this question:
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- 21.
Pulp chamber ស្ថិតនៅខាងក្នុង នៃផ្នែកតួធ្មេញដែលរួមមាន:
- A.
Pulp horn , roof and floor of pulp chamber
- B.
Roof and floor
- C.
Furcation canal and floor of pulp chamber
- D.
Pulp horn and roof of pulp chamber
Correct Answer
A. Pulp horn , roof and floor of pulp chamberExplanation
The correct answer is pulp horn, roof, and floor of the pulp chamber. The pulp chamber is located inside the tooth and contains the dental pulp, which consists of blood vessels, nerves, and connective tissue. The pulp horn refers to the extensions of the pulp chamber that reach towards the cusps of the tooth. The roof and floor of the pulp chamber are the upper and lower boundaries of the chamber, respectively. These structures together make up the internal anatomy of the tooth and play important roles in maintaining the vitality and health of the tooth.Rate this question:
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- 22.
Pulp chamber :
- A.
រួមតូចបន្តិចម្តងៗទៅតាមអាយុកាលរបស់វា
- B.
ចំពោះធ្មេញកូនក្មេង Pulp Chamber រួម តូច
- C.
ចំពោះធ្មេញមនុស្សចាស់ Pulp Chamber រីកធំ
- D.
មិនទៀងទាត់
Correct Answer
A. រួមតូចបន្តិចម្តងៗទៅតាមអាយុកាលរបស់វាExplanation
The explanation states that the size of the pulp chamber varies according to the age of the individual. In young children, the pulp chamber is small, while in older individuals, it is larger. This suggests that the size of the pulp chamber changes as a person grows older.Rate this question:
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- 23.
Root canal គឺជារុន្ធឬស:
- A.
បន្តពីpulp chamber មានorifice នៅក្រោមcervical នៃធ្មេញប្រហែល1mm-2mm
- B.
ស្ថិតនៅ1/2នៃroot of teeth
- C.
ស្ថិតនៅចុងនៃ apex
- D.
ស្ថិតនៅ1/3នៃroot of teeth
Correct Answer
A. បន្តពីpulp chamber មានorifice នៅក្រោមcervical នៃធ្មេញប្រហែល1mm-2mmExplanation
The root canal is a space inside the tooth that extends from the pulp chamber to the tip of the root. It is located at the bottom of the tooth, around 1/3 of the root, and ends at the apex. The orifice of the root canal is located underneath the cervical area of the tooth, which is about 1mm-2mm from the pulp chamber.Rate this question:
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- 24.
Orifice គឺជារុន្ធ:
- A.
របស់root canal ដែលស្ថិតនៅក្រោមcervical នៃធ្មេញប្រហែល1mm-2mm
- B.
ស្ថិតនៅចុងនៃ apex
- C.
បន្តចេញពី root canal
- D.
ស្ថិតនៅត្រង់ចំណុចconstriction
Correct Answer
A. របស់root canal ដែលស្ថិតនៅក្រោមcervical នៃធ្មេញប្រហែល1mm-2mmExplanation
The orifice of the root canal is located below the cervical area of the tooth, which is the area near the gum line. It is typically found at the apex or the tip of the root. The orifice is the opening or entrance of the root canal, and it is situated at a constriction point. It is usually around 1mm-2mm in size.Rate this question:
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- 25.
Black espac គឺជាលំហរស្ថិតនៅចន្លោះ:
- A.
Minor foramen & major foramen
- B.
Pulp chamber & root canal
- C.
Apex & constriction
- D.
Minor foramen & apex
Correct Answer
A. Minor foramen & major foramenExplanation
The correct answer is "minor foramen & major foramen". The minor foramen and major foramen are both openings in the skull that allow for the passage of nerves and blood vessels. The minor foramen is located towards the back of the skull, while the major foramen is located towards the front. These openings are important for the functioning of the nervous system and the circulation of blood throughout the body.Rate this question:
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- 26.
Access cavity of maxillary central incisor is :
- A.
Triangular with the base toward the border libre and apex toward cingulum
- B.
Triangular with the base toward the border libre and apex toward mesial
- C.
Triangular with the base toward the border libre and apex toward distal
- D.
Triangular with the base toward cingulum and apex toward border libre.
Correct Answer
A. Triangular with the base toward the border libre and apex toward cingulumExplanation
The access cavity of a maxillary central incisor is triangular with the base toward the border libre and apex toward the cingulum. This means that the access opening created in the tooth will have a triangular shape, with the widest part of the triangle facing towards the biting edge (border libre) of the tooth and the pointed part of the triangle facing towards the back (cingulum) of the tooth. This specific shape and orientation are important for effectively accessing and treating the pulp chamber and root canals of the tooth.Rate this question:
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- 27.
Access cavity of maxillary lateral incisor is :
- A.
Triangular with the base toward the border libre and apex toward cingulum
- B.
Triangular with the base toward the border libre and apex toward the mesial
- C.
Triangular with the base toward the border libre and apex toward the distal
- D.
Triangular with the base toward the palatin and apex toward border libre
Correct Answer
A. Triangular with the base toward the border libre and apex toward cingulumExplanation
The correct answer is "Triangular with the base toward the border libre and apex toward cingulum." This means that the access cavity of the maxillary lateral incisor is shaped like a triangle, with the base facing towards the border libre (the edge of the tooth) and the apex (the pointed end) facing towards the cingulum (the raised area on the lingual side of the tooth). This shape allows for proper access to the pulp chamber and root canals during endodontic treatment.Rate this question:
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- 28.
Access cavity of maxillary canine is :
- A.
Oval is wider buccal-palatal
- B.
Triangular with the base toward the border libre and apex toward the cingulum
- C.
Oval is wider mesial-distal
- D.
Triangular with the base toward the cingulum and apex toward the boder libre
Correct Answer
A. Oval is wider buccal-palatalExplanation
The access cavity of the maxillary canine is described as oval and wider buccal-palatal. This means that the shape of the access cavity is elongated and wider from the buccal (cheek) to the palatal (tongue) aspect. This shape allows for better visibility and access to the pulp chamber and canals of the tooth during root canal treatment.Rate this question:
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- 29.
Access cavity of maxillary first premolar is :
- A.
Oval is wider buccal-palatal
- B.
Oval is wider mesial-distal
- C.
Triangular with the base toward the border libre and apex toward the distal
- D.
Triangular with the base toward the border libre and apex toward the mesial
Correct Answer
A. Oval is wider buccal-palatalExplanation
The access cavity of a maxillary first premolar is oval and wider buccal-palatal. This means that the shape of the access cavity is elongated in the buccal-palatal direction, with the widest part of the cavity being from the buccal to the palatal surface. This shape allows for better visualization and access to the pulp chamber and canals of the tooth during root canal treatment.Rate this question:
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- 30.
Access cavity of maxillary second premolar is :
- A.
Oval is wider buccal-palatal
- B.
Triangular with the base toward the border libre and apex toward the mesial
- C.
Oval is wider mesial-distal
- D.
Triangular with the base toward the border libre and apex toward the distal
Correct Answer
A. Oval is wider buccal-palatalExplanation
The correct answer is Oval is wider buccal-palatal. This means that the access cavity of the maxillary second premolar is shaped like an oval, with the wider part of the oval being in the buccal-palatal direction.Rate this question:
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- 31.
Access cavity of maxillary first molar is :
- A.
Triangular in shape with the base toward the buccal and apex toward palatal
- B.
Triangular in shape with the base toward the mesial and apex toward distal
- C.
Triangular in shape with the base toward the distal and apex toward the mesial
- D.
Oval is wider mesial-distal
Correct Answer
A. Triangular in shape with the base toward the buccal and apex toward palatalExplanation
The access cavity of the maxillary first molar is triangular in shape with the base toward the buccal and apex toward the palatal. This means that the access cavity is wider on the buccal side and narrower on the palatal side, resembling a triangle. This shape allows for better visibility and access to the pulp chamber and canals during root canal treatment.Rate this question:
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- 32.
Access cavity of maxillary second molar is :
- A.
Triangular in shape with the base toward the buccal and apex toward palatal
- B.
Triangular in shape with the base toward the mesial and apex toward the distal
- C.
Triangular in shape with the base toward the distal and apex toward mesal
- D.
Oval is wider mesial-distal
Correct Answer
A. Triangular in shape with the base toward the buccal and apex toward palatalExplanation
The access cavity of the maxillary second molar is triangular in shape with the base toward the buccal and apex toward the palatal. This means that the access cavity has a triangular outline, with the wider part of the triangle facing the buccal (cheek) side and the narrower part of the triangle facing the palatal (tongue) side. This shape allows for better visualization and access to the pulp chamber and root canals during endodontic treatment.Rate this question:
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- 33.
Contraindications of indirect pulp capping is:
- A.
Negative reaction of electric pulp testing
- B.
Small exposures less than 1mm
- C.
Small exposures less than 2mm
- D.
Small exposures less than 1mm and Small exposures less than 2mm
Correct Answer
A. Negative reaction of electric pulp testingExplanation
The contraindication of indirect pulp capping is a negative reaction of electric pulp testing. This means that if the tooth does not respond to electric pulp testing, it is not suitable for indirect pulp capping. This could indicate that the pulp is already necrotic or that the tooth has irreversible pulpitis, making indirect pulp capping ineffective. Small exposures less than 1mm or 2mm are not contraindications for indirect pulp capping.Rate this question:
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- 34.
Access cavity of mandibular lateral incisor is :
- A.
Oval is wider buccal-lingual
- B.
Triangular with the base toward the border libre and apex toward cingulum
- C.
Oval is wider mesial-distal
- D.
Triangular with the base toward border libre and apex toward distal
Correct Answer
A. Oval is wider buccal-lingualExplanation
The correct answer is "Oval is wider buccal-lingual." This means that the access cavity of the mandibular lateral incisor is shaped like an oval, with the wider part of the oval being in the buccal-lingual direction. This shape allows for better access and visibility during dental procedures.Rate this question:
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- 35.
Access cavity of mandibular canine is :
- A.
Oval is wider buccal-lingual
- B.
Triangular with the base toward the border libre and apex toward the cingulum
- C.
Oval is wider mesial-distal
- D.
Triangular with the base toward cingulum and apex toward border libre
Correct Answer
A. Oval is wider buccal-lingualExplanation
The access cavity of a mandibular canine is described as oval and wider buccal-lingual. This means that the shape of the access cavity is elongated in the buccal-lingual direction, with the width being greater in this dimension compared to the mesial-distal dimension. This shape allows for better visualization and instrumentation of the root canal system during endodontic treatment of the mandibular canine.Rate this question:
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- 36.
Access cavity of mandibular first premolar is :
- A.
Oval is wider buccal-lingual
- B.
Oval is wider mesial-distal
- C.
Triangular with the base toward the border libre and apex toward the distal
- D.
Triangular with the base toward distal and apex toward border libre
Correct Answer
A. Oval is wider buccal-lingualExplanation
The access cavity of a mandibular first premolar is oval and wider buccal-lingual. This means that the access cavity is shaped like an oval and is wider in the buccal-lingual direction compared to the mesial-distal direction. This shape allows for better access to the pulp chamber and facilitates the removal of decayed or damaged tissue during root canal treatment.Rate this question:
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- 37.
Access cavity of mandibular second premolar is :
- A.
Oval is wider buccal-lingual
- B.
Triangular with the base toward the border libre and apex toward the mesial
- C.
Oval is wider mesial-distal
- D.
Triangular with the base toward the border libre and apex toward the distal
Correct Answer
A. Oval is wider buccal-lingualExplanation
The correct answer is "Oval is wider buccal-lingual." This means that the access cavity of the mandibular second premolar is shaped like an oval, with the widest part being in the buccal-lingual direction. This shape allows for better visibility and access to the pulp chamber during a root canal treatment.Rate this question:
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- 38.
Access cavity of mandibular first molar is :
- A.
Triangular in shape with the base toward the mesial and apex toward distal
- B.
Triangular in shape with the base toward the buccal and apex toward palatin
- C.
Triangular in shape with the base toward the distal and apex toward the mesial
- D.
Triangular in shape with the base toward palatin and apex toward buccal
Correct Answer
A. Triangular in shape with the base toward the mesial and apex toward distalExplanation
The access cavity of the mandibular first molar is triangular in shape with the base toward the mesial and apex toward the distal. This means that the access cavity is wider on the mesial side and narrows down towards the distal side. This shape allows for better visibility and access to the pulp chamber and canals of the tooth during endodontic treatment.Rate this question:
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- 39.
Access cavity of mandibular second molar is :
- A.
Triangular in shape with the base toward the mesial and apex toward distal
- B.
Triangular in shape with the base toward the buccal and apex toward palatin
- C.
Triangular in shape with the base toward the distal and apex toward mesial
- D.
Triangular in shape with the base toward distal and apex toward buccal
Correct Answer
A. Triangular in shape with the base toward the mesial and apex toward distalExplanation
The access cavity of the mandibular second molar is triangular in shape with the base toward the mesial and apex toward distal. This means that the access cavity has three sides, with one side being larger and facing the mesial direction, while the other two sides converge to form a point in the distal direction. This shape allows for better access to the pulp chamber and can facilitate effective cleaning and treatment of the tooth.Rate this question:
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- 40.
Average age of eruption for mandibular first molar is:
- A.
6-7 years
- B.
8-9 years
- C.
9-10 years
- D.
10-11 years
Correct Answer
A. 6-7 yearsExplanation
The average age of eruption for the mandibular first molar is 6-7 years. This means that most children will have this tooth erupt between the ages of 6 and 7. It is important to note that this is an average, so some children may have their tooth erupt slightly earlier or later. However, 6-7 years is the typical age range for eruption of the mandibular first molar.Rate this question:
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- 41.
Average age of eruption for maxillary canine is:
- A.
11-12 years
- B.
6-7 years
- C.
7-8 years
- D.
14-15 years
Correct Answer
A. 11-12 yearsExplanation
The average age of eruption for the maxillary canine is 11-12 years. This means that most individuals will have their maxillary canine teeth erupt between the ages of 11 and 12.Rate this question:
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- 42.
Function of Endo-Z :
- A.
Refine the preparation
- B.
Access the pulp chamber
- C.
Access cavity
- D.
Acceess the orifice of root canal
Correct Answer
A. Refine the preparationExplanation
The function of Endo-Z is to refine the preparation. This means that it is used to further shape and clean the access cavity, pulp chamber, and orifice of the root canal. Endo-Z is likely a tool or instrument used in endodontic procedures to ensure that the preparation is properly refined and ready for further treatment.Rate this question:
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- 43.
Function of tirenerf :
- A.
Remove the pulp
- B.
Remove gutta-percha
- C.
Enlarge the root canal
- D.
Working length
Correct Answer
A. Remove the pulpExplanation
The function of tirenerf is to remove the pulp.Rate this question:
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- 44.
Function of gates :
- A.
To enlarge the coronal third of the canal during endodontic treatment
- B.
Remove the pulp
- C.
To enlarge the apex during endodontic treatment
- D.
Drill
Correct Answer
A. To enlarge the coronal third of the canal during endodontic treatmentExplanation
The function of gates in endodontic treatment is to enlarge the coronal third of the canal. This is done to facilitate the access and cleaning of the canal during the procedure. Gates are used to remove any obstructions or debris in the coronal portion of the canal, allowing for better visibility and improved treatment outcomes. By enlarging this area, the dentist can effectively remove the pulp and ensure proper disinfection of the root canal system.Rate this question:
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- 45.
Speed of gates:
- A.
800t/mn
- B.
1000t/mn
- C.
300t/mn – 6000t/mn
- D.
700t/mn
Correct Answer
A. 800t/mnExplanation
The correct answer is 800t/mn because it is the only option that matches one of the given speeds of the gates. The other options do not match any of the given speeds.Rate this question:
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- 46.
Function of finger spreader :
- A.
To condense gutta-percha lateral the canal during obturation
- B.
To condense gutta-percha vertical the canal during obturation
- C.
To probe the orifice of the root canal
- D.
To probe the orifice of the pulp chamber
Correct Answer
A. To condense gutta-percha lateral the canal during obturationExplanation
The function of a finger spreader is to condense gutta-percha laterally in the canal during obturation. Gutta-percha is a material used in root canal treatment to fill and seal the canal. Condensing it laterally helps to ensure a tight and complete seal, preventing any bacteria or debris from entering the canal and causing infection or complications. Vertical condensation, on the other hand, refers to the technique of condensing gutta-percha vertically in the canal, which is not the function of a finger spreader.Rate this question:
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- 47.
Function of reamer :
- A.
Shaping the canal
- B.
Remove the pulp
- C.
To probe the orifice of the root canal
- D.
Drill
Correct Answer
A. Shaping the canalExplanation
The function of a reamer is to shape the canal. This involves removing any excess material and creating a smooth and even surface within the canal. By shaping the canal, the reamer helps to ensure that it is properly prepared for further dental procedures, such as filling or sealing the canal.Rate this question:
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- 48.
Function of lentulo :
- A.
Used to place materials into the canal by low speed=3000-6000t/mn
- B.
Used to place materials into the canal by low speed=4000-8000t/mn
- C.
Used to place materials into the canal by low speed=2000-3000t/mn
- D.
Used to place materials into the canal by low speed=1000-2000/mn
Correct Answer
A. Used to place materials into the canal by low speed=3000-6000t/mn -
- 49.
Mobility tests in endodontic grade I is :
- A.
Noticeable horizontal movement in its socket
- B.
Within 2mm of horizontal movement
- C.
Within 3mm of horizontal movement
- D.
Within 1mm of horizontal movement
Correct Answer
A. Noticeable horizontal movement in its socketExplanation
The correct answer is "Noticeable horizontal movement in its socket". This means that a tooth with endodontic grade I mobility will have visible movement when pressure is applied horizontally, indicating that the tooth is slightly loose in its socket. This level of mobility is considered normal and does not necessarily indicate any underlying issues or problems with the tooth.Rate this question:
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- 50.
Thermal sensitivity not respond when:
- A.
Pulp necrosis
- B.
Pulpitis
- C.
Pulpitis irreversible
- D.
Pulpitis and pulpitis irreversible
Correct Answer
A. Pulp necrosisExplanation
Thermal sensitivity does not respond when there is pulp necrosis. Pulp necrosis refers to the death of the dental pulp, which is the innermost part of the tooth containing nerves and blood vessels. When the pulp is necrotic, it means that it is no longer alive and therefore cannot transmit any sensations, including thermal sensitivity. This lack of response to thermal stimuli is indicative of pulp necrosis.Rate this question:
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Mar 15, 2023Quiz Edited by
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Mar 04, 2019Quiz Created by
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