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Questions and Answers
What is the minimum amount of temporary filling material needed for an adequate coronal seal?
What is the minimum amount of temporary filling material needed for an adequate coronal seal?
- 4.0 mm
- 2.5 mm
- 3.0 mm
- 3.5 mm (correct)
What clue indicates that a second orifice may exist when only one orifice is found?
What clue indicates that a second orifice may exist when only one orifice is found?
- The orifice is oval-shaped
- The orifice is larger than usual
- The pulp chamber floor is uneven
- The orifice is located off-center (correct)
Which method has been suggested to aid in locating root canal orifices?
Which method has been suggested to aid in locating root canal orifices?
- Ultrasound imaging
- Transillumination with a curing light (correct)
- Laser scanning
- Vibratory instruments
According to the principles of endodontic access cavity preparation, what is the first step?
According to the principles of endodontic access cavity preparation, what is the first step?
What is the significance of the distance between orifices in a root canal system?
What is the significance of the distance between orifices in a root canal system?
What is the role of caries detection dye in endodontics?
What is the role of caries detection dye in endodontics?
What effect does apically pre-curved small K-files have during exploration of orifices?
What effect does apically pre-curved small K-files have during exploration of orifices?
Which of the following is NOT a principle of endodontic access cavity preparation?
Which of the following is NOT a principle of endodontic access cavity preparation?
What does the First Law of Symmetry state about canal orifices?
What does the First Law of Symmetry state about canal orifices?
Which law describes the relationship between the pulp chamber floor and its walls at the CEJ?
Which law describes the relationship between the pulp chamber floor and its walls at the CEJ?
The Third Law of Orifices Location specifies that canal orifices are found at which anatomical feature?
The Third Law of Orifices Location specifies that canal orifices are found at which anatomical feature?
What is the significance of the distance from the clinical crown to the pulp chamber wall at the CEJ?
What is the significance of the distance from the clinical crown to the pulp chamber wall at the CEJ?
According to the guidelines for access preparation, which surface is approached for anterior teeth?
According to the guidelines for access preparation, which surface is approached for anterior teeth?
What is indicated by the Second Law of Symmetry regarding canal orifices?
What is indicated by the Second Law of Symmetry regarding canal orifices?
What does the Law of Color Change state about the pulp chamber floor?
What does the Law of Color Change state about the pulp chamber floor?
What is the primary purpose of accessing posterior teeth through their occlusal surface?
What is the primary purpose of accessing posterior teeth through their occlusal surface?
What is the primary purpose of using carbide burs like the transmetal bur in dentistry?
What is the primary purpose of using carbide burs like the transmetal bur in dentistry?
Which burs are particularly useful for accessing receded pulp chambers and calcified orifices?
Which burs are particularly useful for accessing receded pulp chambers and calcified orifices?
What is the role of Gates-Glidden burs during the endodontic procedure?
What is the role of Gates-Glidden burs during the endodontic procedure?
What precaution should a clinician take when using Gates-Glidden burs for canal flaring?
What precaution should a clinician take when using Gates-Glidden burs for canal flaring?
Which endodontic explorer is specifically designed with a thinner, stiffer tip for identifying calcified canals?
Which endodontic explorer is specifically designed with a thinner, stiffer tip for identifying calcified canals?
What is a potential consequence of excessive dentin removal during canal flaring?
What is a potential consequence of excessive dentin removal during canal flaring?
Which bur is characterized as a tapered nickel-titanium orifice opener?
Which bur is characterized as a tapered nickel-titanium orifice opener?
The purpose of an endodontic explorer like the DG-16 is to:
The purpose of an endodontic explorer like the DG-16 is to:
What is one of the primary benefits of the toilet of the cavity during endodontic access preparation?
What is one of the primary benefits of the toilet of the cavity during endodontic access preparation?
Which bur is preferred for penetrating through the roof of the pulp chamber?
Which bur is preferred for penetrating through the roof of the pulp chamber?
What type of bur is recommended for endodontic access through porcelain restorations?
What type of bur is recommended for endodontic access through porcelain restorations?
Which type of bur would be safest for creating axial wall extensions to prevent perforation of the pulp chamber?
Which type of bur would be safest for creating axial wall extensions to prevent perforation of the pulp chamber?
What is a key characteristic of the Trans-metal bur?
What is a key characteristic of the Trans-metal bur?
Which option is NOT an objective of the principles of endodontic access cavity preparation?
Which option is NOT an objective of the principles of endodontic access cavity preparation?
Which device is considered essential for enhancing visibility during endodontic procedures?
Which device is considered essential for enhancing visibility during endodontic procedures?
What is the purpose of irrigating the cavity during endodontic treatment?
What is the purpose of irrigating the cavity during endodontic treatment?
What is the primary reason for removing all defective restorations and caries before entry into the pulp chamber?
What is the primary reason for removing all defective restorations and caries before entry into the pulp chamber?
Why is it necessary to remove unsupported tooth structures during cavity access?
Why is it necessary to remove unsupported tooth structures during cavity access?
What can happen if access cavity walls restrict direct-line passage of instruments?
What can happen if access cavity walls restrict direct-line passage of instruments?
What instrument is primarily used to locate canal orifices during root canal treatment?
What instrument is primarily used to locate canal orifices during root canal treatment?
How does adequate illumination affect the inspection of the pulp chamber?
How does adequate illumination affect the inspection of the pulp chamber?
What role do irrigants and dyes play in root canal localization?
What role do irrigants and dyes play in root canal localization?
What does flaring of canal orifices facilitate during root canal treatment?
What does flaring of canal orifices facilitate during root canal treatment?
What type of magnification device is mentioned as helpful during the inspection of the pulp chamber?
What type of magnification device is mentioned as helpful during the inspection of the pulp chamber?
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Study Notes
Third Law of Orifice Location
- Canal orifices are located at the terminus of the root development fusion lines.
- These are also known as developmental grooves.
Access Cavity Guidelines:
- The best approach for anterior teeth is through the lingual surface.
- The best approach for posterior teeth is through the occlusal surface.
- For mandibular incisors, access can be moved from the lingual surface to the incisal surface.
Access Cavity Preparation
- The floor of the pulp chamber is always darker in color than the walls.
- If only one canal orifice is found and it is not in the center of the tooth, another orifice probably exists on the opposite side.
- The closer the orifices are, the greater the chance that they join at some point in the body of the root.
- The greater the distance between the orifices, the greater the chance that the canals will remain separate.
Access Cavity Armamentaria
- Carbide burs are the preferred option for penetrating through the roof of the pulp chamber.
- Round carbide burs are used for removing the roof.
- Round diamond burs can also be used for removing the roof.
- Diamond burs are less traumatic to porcelain than carbide burs.
- Transmetal burs are highly efficient for cutting through metallic restorations.
- Gates-Glidden burs, or orifice shapers, are used to flare canal orifices.
- DG-16 endodontic explorers are used to identify canal orifices.
- CK-17 explorers are useful for identifying calcified canals.
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