The most common cause of RCT “Root Canal Treatment” failure is: A. The canal not filled completely (Short obturation) B. Over filled canals

The most common cause of RCT “Root Canal Treatment” failure is:
A. The canal not filled completely (Short obturation)
B. Over filled canals
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1 Answer

Answer :

A. The canal not filled completely (Short obturation)
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Related questions

Swelling after RCT is mainly caused by (Being asked as: What is the most frequent cause of pain which occurs several days after obturation?, too): A. Entrapped Bacteria, or the presence of bacteria in the periapical region. B. Underfilling the root canal system C. Overfilled root canal

Description : Swelling after RCT is mainly caused by (Being asked as: What is the most frequent cause of pain which occurs several days after obturation?, too): A. Entrapped Bacteria, or the presence of bacteria in the periapical region. B. Underfilling the root canal system C. Overfilled root canal

Last Answer : A. Entrapped Bacteria, or the presence of bacteria in the periapical region.

What is NOT characteristic of root canal filing materials (“obturation material”) A. Tacky adhesive to walls B. Radio opaque C. Not irritating D. Quick in setting

Description : What is NOT characteristic of root canal filing materials (“obturation material”) A. Tacky adhesive to walls B. Radio opaque C. Not irritating D. Quick in setting

Last Answer : D. Quick in setting

Two central incisors on a radiograph are showing with what looks like eye drop radiolucency. You decided to start endodontic treatment on these teeth but when you tried to open access to the root canal you find clearly closed orifices with what look like secondary dentine. What is your initial management? A. Leave as it and start a permanent restoration. B. Start systemic antibiotic C. Try to ream and file canals

Description : Two central incisors on a radiograph are showing with what looks like eye drop radiolucency. You decided to start endodontic treatment on these teeth but when you tried to open access to the root ... and start a permanent restoration. B. Start systemic antibiotic C. Try to ream and file canals

Last Answer : C. Try to ream and file canals

To achieve optimum cavity preparation, which of the following factors of internal anatomy must be considered in root canal treatment: A. Outline form B. The age and shape of pulp chamber; in addition to the direction of individual root canals. C. Internal external relationship D. Intra-coronal preparation E. None of the above

Description : To achieve optimum cavity preparation, which of the following factors of internal anatomy must be considered in root canal treatment: A. Outline form B. The age and shape of pulp chamber; in ... root canals. C. Internal external relationship D. Intra-coronal preparation E. None of the above

Last Answer : B. The age and shape of pulp chamber; in addition to the direction of individual root canals.

X rays are used in endodontic treatment to: A. Aid in the diagnosis of periapical hard tissue lesion B. Determine the number, location, shape, size and direction of roots and root canals C. Confirm the length of root canals D. Evaluate the adequacy of the complete root canal filling E. All of the above

Description : X rays are used in endodontic treatment to: A. Aid in the diagnosis of periapical hard tissue lesion B. Determine the number, location, shape, size and direction of roots and root canals C. Confirm ... root canals D. Evaluate the adequacy of the complete root canal filling E. All of the above

Last Answer : E. All of the above

After obturation and on X-ray you notice the obturation materials are 1mm beyond apex. What is your first management? A. Refill the canal B. Pull the GP cone about 1mm out and take a new X-ray C. Leave it as it

Description : After obturation and on X-ray you notice the obturation materials are 1mm beyond apex. What is your first management? A. Refill the canal B. Pull the GP cone about 1mm out and take a new X-ray C. Leave it as it

Last Answer : B. Pull the GP cone about 1mm out and take a new X-ray

Mesiobuccal root of maxillary first molars MOST COMMONLY have: A. One canal with one foreman B. One or two canals with one foreman C. Two canals with one foreman D. Two canals with two foramen

Description : Mesiobuccal root of maxillary first molars MOST COMMONLY have: A. One canal with one foreman B. One or two canals with one foreman C. Two canals with one foreman D. Two canals with two foramen

Last Answer : D. Two canals with two foramen

In RCT the ideal root filling: A. Ends at the apex B. Extends beyond apex to achieve a good seal C. Ends at the dentino-cemental junction

Description : In RCT the ideal root filling: A. Ends at the apex B. Extends beyond apex to achieve a good seal C. Ends at the dentino-cemental junction

Last Answer : C. Ends at the dentino-cemental junction

A child has sustained a traumatic exposure of primary central incisor, he presents to you for treatment two days after the injury. Which of the following should be considered? A. Pulpotomy and Ca(OH)2 B. Pulpotomy and formocresol C. Direct pulp capping D. Pulpectomy (RCT)

Description : A child has sustained a traumatic exposure of primary central incisor, he presents to you for treatment two days after the injury. Which of the following should be considered? A. Pulpotomy and Ca(OH)2 B. Pulpotomy and formocresol C. Direct pulp capping D. Pulpectomy (RCT)

Last Answer : D. Pulpectomy (RCT)

The cause of development of lateral canals is: A. Cracks in Hertwig’s epithelial root sheath

Description : The cause of development of lateral canals is: A. Cracks in Hertwig’s epithelial root sheath

Last Answer : A. Cracks in Hertwig’s epithelial root sheath

Bone is characterised by:** A. Haversian canal around bony canals B. Irregularly arraigned tubulae

Description : Bone is characterised by:** A. Haversian canal around bony canals B. Irregularly arraigned tubulae

Last Answer : A. Haversian canal around bony canals

What is the main purpose of using corticosteroids in pulpal obturation material? A. For their antibiotic action B. For their antiinflammatory action C. To relief pulp pressure

Description : What is the main purpose of using corticosteroids in pulpal obturation material? A. For their antibiotic action B. For their antiinflammatory action C. To relief pulp pressure

Last Answer : B. For their antiinflammatory action

What is the main purpose of using corticosteroids in pulpal obturation material: A. For their antibiotic action B. For their antiinflammatory action C. To relief pulp pressure

Description : What is the main purpose of using corticosteroids in pulpal obturation material: A. For their antibiotic action B. For their antiinflammatory action C. To relief pulp pressure

Last Answer : B. For their antiinflammatory action

Ledermix is used in RCT to relieve pain because of, A. Antibiotics B. Corticosteroid

Description : Ledermix is used in RCT to relieve pain because of, A. Antibiotics B. Corticosteroid

Last Answer : A. Antibiotics B. Corticosteroid

The ideal length of RCT is, A. At the apex B. As far as you can obturate C. 0.5 - 1.5 mm before the apex

Description : The ideal length of RCT is, A. At the apex B. As far as you can obturate C. 0.5 - 1.5 mm before the apex

Last Answer : C. 0.5 - 1.5 mm before the apex

On an X ray you find the cement of the previous root canal treatment is extending 1mm beyond the apex without any symptoms; what would you do: A. Remove restoration material and retreat B. Apiectomy C. Leave as is until any complications occur

Description : On an X ray you find the cement of the previous root canal treatment is extending 1mm beyond the apex without any symptoms; what would you do: A. Remove restoration material and retreat B. Apiectomy C. Leave as is until any complications occur

Last Answer : C. Leave as is until any complications occur

What indicates for a periapical surgery: A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root B. When root canal treatment is faulty C. When there is danger of involving other structures D. When the bony defect is so extensive that the edges of the incisors will collapse E. None of the above

Description : What indicates for a periapical surgery: A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root B. When root canal treatment is faulty C. When ... bony defect is so extensive that the edges of the incisors will collapse E. None of the above

Last Answer : A. Where performing an endodontic treatment on existing root canal filling may lead to fracture of the root

The initial priority in treatment of horizontal fractures is: A. Preservation of pulp B. Immobilisation C. Root canal treatment D. Calcium hydroxide treatment

Description : The initial priority in treatment of horizontal fractures is: A. Preservation of pulp B. Immobilisation C. Root canal treatment D. Calcium hydroxide treatment

Last Answer : B. Immobilisation

Treatment of gangrenous tooth: A. Pulp capping B. Root canal therapy C. Pulpotomy

Description : Treatment of gangrenous tooth: A. Pulp capping B. Root canal therapy C. Pulpotomy

Last Answer : B. Root canal therapy

A child with a fracture of a tooth at the apical third of the root, what would be your first decision: A. Wait and recall after one month and observe for any necrotic or radiolucency B. Root canal treatment C. Extraction D. Apiectomy

Description : A child with a fracture of a tooth at the apical third of the root, what would be your first decision: A. Wait and recall after one month and observe for any necrotic or radiolucency B. Root canal treatment C. Extraction D. Apiectomy

Last Answer : A. Wait and recall after one month and observe for any necrotic or radiolucency

Which of the following is a radiographic feature of dentino-genesis imperfecta: A. Small pulp chambers and root canals, normal enamel B. Enamel is missing but dentine formation is normal C. Enamel and dentine show disturbances D. Pulp is normal but dentine is abnormal

Description : Which of the following is a radiographic feature of dentino-genesis imperfecta: A. Small pulp chambers and root canals, normal enamel B. Enamel is missing but dentine formation is normal C. Enamel and dentine show disturbances D. Pulp is normal but dentine is abnormal

Last Answer : A. Small pulp chambers and root canals, normal enamel

.Lateral canals are usually found at: A. The middle of the root B. First third of the root close to the crown C. The apical third

Description : .Lateral canals are usually found at: A. The middle of the root B. First third of the root close to the crown C. The apical third

Last Answer : C. The apical third

The emergency treatment for painless necrotic pulp is: A. Drainage through canals B. None

Description : The emergency treatment for painless necrotic pulp is: A. Drainage through canals B. None

Last Answer : A. Drainage through canals

The concomitant perio-periapical lesion as the cause of endodontic failure: A. Cannot be discovered prior to endo treatment B. May be discovered prior to endo treatment C. Is most commonly found in maxillary teeth D. Is most commonly found in mandibular teeth E. None of the above

Description : The concomitant perio-periapical lesion as the cause of endodontic failure: A. Cannot be discovered prior to endo treatment B. May be discovered prior to endo treatment C. Is most commonly found in maxillary teeth D. Is most commonly found in mandibular teeth E. None of the above

Last Answer : B. May be discovered prior to endo treatment

The most common cause of porosity in porcelain jacket crowns is, A. Moisture contamination B. Excessive firing temperature C. Failure to anneal the platinum matrix D. Excessive condensation of the porcelain E. Inadequate condensation of the porcelain

Description : The most common cause of porosity in porcelain jacket crowns is, A. Moisture contamination B. Excessive firing temperature C. Failure to anneal the platinum matrix D. Excessive condensation of the porcelain E. Inadequate condensation of the porcelain

Last Answer : E. Inadequate condensation of the porcelain

The most common cause of failure of the IDN “Inferior Dental Nerve” block is, A. Injecting too low B. Injecting too high

Description : The most common cause of failure of the IDN “Inferior Dental Nerve” block is, A. Injecting too low B. Injecting too high

Last Answer : A. Injecting too low

The method you will use to fill root canal of maxillary lateral incisor is: A. One major Gutta Percha cone B. Laterally condensed C. Laterally above condensed

Description : The method you will use to fill root canal of maxillary lateral incisor is: A. One major Gutta Percha cone B. Laterally condensed C. Laterally above condensed

Last Answer : B. Laterally condensed

The technique of placing guttapercha cones against the root canal walls providing space for additional guttapercha is termed: A. Lateral Condensation B. One major Gutta Percha point C. Laterally above condensed

Description : The technique of placing guttapercha cones against the root canal walls providing space for additional guttapercha is termed: A. Lateral Condensation B. One major Gutta Percha point C. Laterally above condensed

Last Answer : A. Lateral Condensation

What is the main function of EDTA in endodontics? A. Decalcification of dentine B. Cleaning debris from root canal

Description : What is the main function of EDTA in endodontics? A. Decalcification of dentine B. Cleaning debris from root canal

Last Answer : A. Decalcification of dentine

A patient comes to you with medium pain of tooth filled with Composite resin as a result of cold or hot drinks, what will your initial management be, A. Remove the restorative material and start an Endontic treatment B. Remove the restorative material and place a sedative temporary material C. Place a coat of bonding material on the old composite

Description : A patient comes to you with medium pain of tooth filled with Composite resin as a result of cold or hot drinks, what will your initial management be, A. Remove the restorative material and ... material and place a sedative temporary material C. Place a coat of bonding material on the old composite

Last Answer : B. Remove the restorative material and place a sedative temporary material

The prognosis of teeth with apical resorption is : A. Poor B. Good if apex can be sealed C. Dependant upon periapical surgery D. Contingent upon systemic antibiotic therapy combined with treatment of the canal

Description : The prognosis of teeth with apical resorption is : A. Poor B. Good if apex can be sealed C. Dependant upon periapical surgery D. Contingent upon systemic antibiotic therapy combined with treatment of the canal

Last Answer : B. Good if apex can be sealed

A vital tooth has a crown cemented to a pin-retained amalgam core; where does a failure occur: A. Between crown and cement B. Between core and cement C. In the crown and the root D. In the core and the margin preparation

Description : A vital tooth has a crown cemented to a pin-retained amalgam core; where does a failure occur: A. Between crown and cement B. Between core and cement C. In the crown and the root D. In the core and the margin preparation

Last Answer : B. Between core and cement

.Which of the following is true: A. Antibiotics are useful in the treatment of periodontitis B. Trauma from occlusion causes thickening of the marginal gingivae C. Periodontitis is the primary cause of teeth lost after the age of 35. D. All periodontal pockets can be identified by x-ray E. Periodontitis is the most common disease in the oral cavity

Description : .Which of the following is true:  A. Antibiotics are useful in the treatment of periodontitis   B. Trauma from occlusion causes thickening of the marginal gingivae  C. Periodontitis is the ... can be identified by x-ray  E. Periodontitis is the most common disease in the oral cavity

Last Answer : E. Periodontitis is the most common disease in the oral cavity

Why do you take x-rays at different horizontal angulations A. To find more canals B. Tofind more foramina

Description : Why do you take x-rays at different horizontal angulations A. To find more canals B. Tofind more foramina

Last Answer : A. To find more canals

A child has less than the normal number of teeth, the mandibular lateral incisor is larger than usual, on x rays it shows with two roots and two roots canals; your diagnosis is:** A. Dilaceration B. Gemination C. Fusion D. Concrescence E. Taurodontism

Description : A child has less than the normal number of teeth, the mandibular lateral incisor is larger than usual, on x rays it shows with two roots and two roots canals; your diagnosis is:** A. Dilaceration B. Gemination C. Fusion D. Concrescence E. Taurodontism

Last Answer : C. Fusion

Lamina dura is actually: A. Cortical bone B. Spongy bone C. Immature bone D. Cribriform plate perforated by nutrition canals

Description : Lamina dura is actually: A. Cortical bone B. Spongy bone C. Immature bone D. Cribriform plate perforated by nutrition canals

Last Answer : D. Cribriform plate perforated by nutrition canals

What is true in regard to lateral mandibular incisors A. 20% have 2 canals with one foramen B. 20% have 2 canals with two foramina C. 40% have two canals with 10% ending in two foramina D. 40% have two canals with only one ending in two foramina

Description : What is true in regard to lateral mandibular incisors A. 20% have 2 canals with one foramen B. 20% have 2 canals with two foramina C. 40% have two canals with 10% ending in two foramina D. 40% have two canals with only one ending in two foramina

Last Answer : D. 40% have two canals with only one ending in two foramina

The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam

Description : The principle cause of failure of amalgam restoration is: A. Improperly prepared amalgam B. Improper cavity preparation C. Perio involvement D. Particles of amalgam

Last Answer : B. Improper cavity preparation

The most common failure in constructing porcelain to metal is: A. Improper metal framework B. Rapid heating

Description : The most common failure in constructing porcelain to metal is: A. Improper metal framework B. Rapid heating

Last Answer : A. Improper metal framework

A 13 years-old has enlarged gingivae; gives a history of Dilantin sodium what is you treatment: a. Oral prophylaxis and gingivoplastic. b. Oral prophylaxis, scaling, root planning. c. Stop medication.

Description : A 13 years-old has enlarged gingivae; gives a history of Dilantin sodium what is you treatment: a. Oral prophylaxis and gingivoplastic. b. Oral prophylaxis, scaling, root planning. c. Stop medication.

Last Answer : b. Oral prophylaxis, scaling, root planning.

An 8 years-old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed presents for treatment three hours after injury. Which of the following should be considered? a- Remove the surface 1. 2 mm of pulp tissue and place calcium hydroxide. b- Place calcium hydroxide directly on the exposed pulp. c- Pulpotomy using formocresol. d- Pulpectomy and immediate root filling. e- Pulpectomy and apexification.

Description : An 8 years-old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed presents for treatment three hours after injury. Which of the ... - Pulpotomy using formocresol. d- Pulpectomy and immediate root filling. e- Pulpectomy and apexification.

Last Answer : a- Remove the surface 1. 2 mm of pulp tissue and place calcium hydroxide

A 13 years-old boy has enlarged gingivae; gives a history of Dilantin sodium what is you treatment:** A. Oral prophylaxis and gingivoplasty B. Oral prophylaxis, scaling, root planning C. Stop medication

Description : A 13 years-old boy has enlarged gingivae; gives a history of Dilantin sodium what is you treatment:** A. Oral prophylaxis and gingivoplasty B. Oral prophylaxis, scaling, root planning C. Stop medication

Last Answer : A. Oral prophylaxis and gingivoplasty

8 years old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed; presents for treatment three hours after injury. Which of the following should be considered? M07*********** A. Remove the surface 1-2 mm of pulp tissue and place calcium hydroxide (Cvek pulpotomy, apexogenesis) B. Place calcium hydroxide directly on the exposed pulp C. Pulpotomy using formocresol D. Pulpectomy and immediate root filling E. Pulpectomy and apexification

Description : 8 years old child who has sustained a fracture of maxillary permanent central incisor in which 2mm of the pulp is exposed; presents for treatment three hours after injury. Which of the ... C. Pulpotomy using formocresol D. Pulpectomy and immediate root filling E. Pulpectomy and apexification

Last Answer : A. Remove the surface 1-2 mm of pulp tissue and place calcium hydroxide (Cvek pulpotomy, apexogenesis)

Internal resorption is, A. Radiolucency over unaltered canal B. Usually in a response to trauma C. Radiopacity over unaltered canal

Description : Internal resorption is, A. Radiolucency over unaltered canal B. Usually in a response to trauma C. Radiopacity over unaltered canal

Last Answer : B. Usually in a response to trauma

The MOST common curvature of palatal root of maxillary first molar is: A. Distal B. Mesial C. Buccal D. Palatal

Description : The MOST common curvature of palatal root of maxillary first molar is: A. Distal B. Mesial C. Buccal D. Palatal

Last Answer : C. Buccal

Canal irrigation la moat Important in north India because the (a) soil is porous (b) level of underground water is high (c) sources of the canals are the perennial rivers (d) regions is densely populated

Description : Canal irrigation la moat Important in north India because the (a) soil is porous (b) level of underground water is high (c) sources of the canals are the perennial rivers (d) regions is densely populated

Last Answer : Ans: (c)

Canal irrigation is most important in the Northern Plains of India because: (a) the soil is porous (b) the level of underground water is high (c) the sources of canals are perennial rivers (d) the region is densely populated

Description : Canal irrigation is most important in the Northern Plains of India because: (a) the soil is porous (b) the level of underground water is high (c) the sources of canals are perennial rivers (d) the region is densely populated

Last Answer : Ans: (c)

Which of the following canals is located in West Bengal? (1) Lower Ganga Canal (2) Sarada Canal (3) Eden Canal (4) Sirhind Canal

Description : Which of the following canals is located in West Bengal? (1) Lower Ganga Canal (2) Sarada Canal (3) Eden Canal (4) Sirhind Canal

Last Answer : (4) Sirhind Canal Explanation: Durgapur Barrage is across the Damodar River at Durgapur in Bardhaman district in the Indian state of West Bengal. The Damodar River Valley Project on the Damodar River ... on the Damodar River and Eden canal. It is about 19 kilometres downstream of Durgapur Barrage.