40 Questions
What is the primary rationale behind nonsurgical retreatment in endodontics?
To remove the content of the root canal space as a source of irritation to the attachment apparatus
Which of the following is a common complication of endodontic instrumentation?
Over-extension of root filling materials
What is the primary reason for inadequate cleaning and shaping of the root canal system?
Failure to entomb bacteria with proper three-dimensional obturation
Which of the following microorganisms is commonly associated with endodontic infections?
Enterococcus Faecalis
What is the primary method of preventing coronal leakage in endodontics?
Using a coronal sealant
What is the primary concern associated with overextended fillings and sealers?
Bacterial contamination
Which of the following is a type of periapical lesion that requires enucleation?
True cyst with epithelial lining
What is the primary goal of crown disassembly during non-surgical retreatment?
To gain access to the apical area
What is a common complication associated with the use of ultrasonic and laser radiation during endodontic instrumentation?
Ceramic cracks
What is the primary concern associated with Enterococcus faecalis infection in endodontic treatment?
Coronal leakage
What is a major disadvantage of using calcium hydroxide for perforation repair?
It can cause necrosis at the site of perforation
Which material is preferred for furcal perforation repair due to its ability to produce a higher concentration of hydroxyapatite?
Calcium Enriched Mixture
What is a characteristic of MTA that makes it difficult to manipulate?
It has a long setting time
What is the advantage of using Biodentin for perforation repair?
It has a short setting time and easy manipulation
Which material has a mechanical bond due to its nanoparticle properties?
Endosequence
Which type of post requires the most difficult removal technique?
Ceramic post
What is the primary method of removing remaining fragments of a fiber post?
Using the post drill
Which removal kit is specifically designed for removing fiber posts?
Manufacturers removal kit
What is the primary function of the GyroTip bur?
To create a pilot channel down the center of the post
Which solvent is commonly used in the 'Wicking Action' method for removing previous filling materials?
Chloroform
What technique is recommended when dealing with overextended GP?
Using a H-file 0.5-1mm beyond the apex with gentle clockwise rotation
What type of carrier is considered easier to use?
Plastic carrier
What is the recommended method for removing hard pastes from the canal?
Using abrasively coated straight ultrasonic tips
What is the purpose of using micro-debriders in endodontic treatment?
To remove debris from the canal
What is the recommended method for removing soft pastes from the canal?
Using irrigation in a crown-down mechanical technique
What is the primary drawback of using laser beam in crown removal?
It is dangerous when not directed properly
What is the primary concern associated with removal of restorative materials during non-surgical retreatment?
It may cause harm to the patient and ligament
What is the primary advantage of using automatic reactivation during non-surgical retreatment?
It is easy to use and has a simple design
What is the primary factor that affects the removal of posts during non-surgical retreatment?
All of the above
What is the primary complication associated with the use of ultrasonic and laser radiation during endodontic instrumentation?
It can cause permanent damage to FPDs
What is the primary advantage of using atraumatic technique during crown removal?
It does not damage the restoration
What is the primary concern associated with the removal of FPDs during non-surgical retreatment?
It can cause harm to the patient and ligament
What is the primary advantage of using pneumatic/automatic thermoplastic resin during non-surgical retreatment?
It allows for removal of FPD without damage to the tooth
What is the primary factor that affects the removal of posts during non-surgical retreatment?
All of the above
What is the primary concern associated with the use of crown splitters during non-surgical retreatment?
It can cause permanent damage to the restoration
What is the primary purpose of creating a staging platform during endodontic treatment?
To alter the bud of GG by cutting at maximum cross-section diameter
What is a major factor in determining the level of instrument separation?
The root thickness and external root concavities
What is the primary purpose of using transillumination during endodontic treatment?
To visualize the root canal anatomy
What is a common complication of endodontic instrumentation?
Ledges and blockages
What is the primary purpose of using sodium hypochlorite irrigation during endodontic treatment?
To dissolve organic tissue and reduce bacteria
A procedure to remove root canal filling materials from the tooth, followed by cleaning, shaping, and obturating the canals. Retreatment aims to remove the source of irritation to the attachment apparatus.
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