Viva Question and Answers in RCT

Certainly! Here are some common viva questions and answers related to root canal treatment:

1. What is a root canal treatment?

• Answer: A root canal treatment, also known as endodontic therapy, is a dental procedure that involves the removal of infected or damaged pulp (the innermost part of a tooth), cleaning and disinfecting the root canals, and then filling and sealing them to prevent further infection.

2. What are the indications for a root canal treatment?

• Answer: Root canal treatment is indicated when a tooth’s pulp is infected or inflamed due to deep decay, trauma, cracked teeth, or repeated dental procedures on the same tooth. Symptoms may include severe toothache, sensitivity to hot or cold, swelling, and abscess formation.

3. What are the steps involved in a root canal procedure?

• Answer: The typical steps in a root canal procedure include:

1. Local anesthesia to numb the tooth and surrounding area.
2. Isolation of the tooth with a rubber dam.
3. Creating an access cavity to reach the pulp chamber.
4. Removal of the infected or damaged pulp tissue.
5. Cleaning and shaping the root canals.
6. Disinfecting the canals to eliminate bacteria.
7. Filling the canals with a biocompatible material (usually gutta-percha).
8. Sealing the access cavity with a dental restoration (e.g., a crown).
9. How do you determine the success of a root canal treatment?

• Answer: Success is determined by the absence of symptoms (pain, swelling, infection) and the maintenance of tooth function. Additionally, follow-up X-rays can show healing of any periapical lesions (infections at the tooth’s root tip).

5. What are the potential complications of a root canal treatment?

• Answer: Complications can include incomplete removal of infected tissue, missed canals, instrument breakage, or post-operative infection. These are relatively rare with modern techniques, but they can occur.

6. What is the alternative to a root canal treatment for a badly infected tooth?

• Answer: The main alternative is tooth extraction. However, it’s generally preferred to save the natural tooth through root canal therapy when possible, as it preserves function and aesthetics.

7. Can a tooth that has had a root canal treatment get re-infected?

• Answer: While it’s rare, reinfection can occur if the sealing of the canals is compromised or if new infection sources arise. Regular follow-up visits to the dentist and good oral hygiene help prevent this.

8. How long does a root canal treatment take to complete?

• Answer: The duration can vary depending on the complexity of the tooth and the presence of infection. Generally, a single-visit root canal can take 60-90 minutes, while multi-visit treatments may span a few weeks to months.

9. Are there any post-treatment care instructions for patients who’ve had a root canal?

• Answer: Patients should avoid chewing on the treated tooth until it’s fully restored with a crown. Good oral hygiene practices, such as regular brushing and flossing, are essential to prevent reinfection.

10. What are the advantages of saving a natural tooth through root canal treatment over extraction and replacement with an artificial tooth? – Answer: The advantages include maintaining natural tooth function, preserving the jawbone, avoiding potential complications of extraction, and achieving a more aesthetically pleasing result.

Remember that these are general questions and answers related to root canal treatment. Specific questions may vary depending on the level of education and expertise of the person conducting the viva examination.

viva Question and Answers in Dental Ceramics

Certainly! Here are some common viva questions and answers related to gutta-percha, a material commonly used in root canal treatments:

1. What is gutta-percha?

• Answer: Gutta-percha is a natural thermoplastic material derived from the latex of certain trees, primarily Palaquium gutta. It is commonly used in dentistry for filling and sealing the root canals during root canal treatment.

2. What are the properties of gutta-percha that make it suitable for use in root canals?

• Answer: Gutta-percha is ideal for root canal treatment because it is biocompatible, dimensionally stable, non-toxic, and can be softened and molded with heat. These properties allow it to seal the root canals effectively.

3. How is gutta-percha used in a root canal treatment?

• Answer: After cleaning and shaping the root canals, gutta-percha is softened with heat and condensed into the prepared space to fill and seal the canals. It creates a tight seal to prevent the entry of bacteria.

4. What are the different forms of gutta-percha used in root canal treatment?

• Answer: Gutta-percha is available in various forms, including cones, points, and pellets. Gutta-percha cones are commonly used for obturation (filling) of the root canals.

5. What is the purpose of using gutta-percha in combination with root canal sealers?

• Answer: Gutta-percha is used in combination with root canal sealers to create a hermetic seal within the root canal system. While gutta-percha fills the space, the sealer helps seal any gaps and enhance the seal’s longevity.

6. Can gutta-percha be easily removed from a root canal if necessary?

• Answer: Yes, gutta-percha can be removed from a root canal if required. Dentists can use specialized instruments and solvents to facilitate its removal during root canal retreatment.

7. Are there any potential drawbacks or challenges associated with using gutta-percha in root canal treatment?

• Answer: Gutta-percha’s main challenge is ensuring a complete seal and preventing voids during its placement. Proper technique and the use of appropriate instruments are crucial to overcome this challenge.

8. How is gutta-percha sterilized before use in root canal treatment?

• Answer: Gutta-percha cones and points are typically pre-sterilized and packaged for single-use. This ensures that the material is sterile when used in dental procedures.

9. Can gutta-percha cause any allergic reactions in patients?

• Answer: Allergic reactions to gutta-percha are extremely rare. It is considered biocompatible and well-tolerated by most patients.

10. What is the role of gutta-percha in the long-term success of a root canal treatment? – Answer: Gutta-percha plays a critical role in preventing bacterial recontamination of the root canal system. Its proper placement and sealing are essential for the long-term success of the treatment.

Viv questions in properties of dental materials

These questions and answers should provide a good overview of gutta-percha and its role in root canal treatments. Be prepared to provide more detailed explanations and examples if needed during a viva examination.

Certainly! Here are some common viva questions and answers related to the restoration of a tooth after a Root Canal Treatment (RCT):

1. Why is restoration necessary after a Root Canal Treatment (RCT)?

• Answer: Restoration is essential to protect the tooth and restore its function. After an RCT, the tooth becomes more brittle and may be weakened. A restoration, often in the form of a crown, provides strength and prevents fracture.

2. What type of restoration is commonly used after an RCT, and why?

• Answer: A dental crown is commonly used after an RCT. Crowns are preferred because they cover and protect the entire tooth, providing stability, strength, and aesthetic appearance.

3. How soon after an RCT should the restoration be placed?

• Answer: The restoration, such as a crown, should be placed as soon as possible after the completion of the root canal treatment, ideally within a few weeks. Delaying restoration can increase the risk of tooth fracture or recontamination.

4. What materials are commonly used for crowns after RCT, and what are their advantages?

• Answer: Common crown materials include porcelain, porcelain-fused-to-metal (PFM), and metal alloys. Porcelain crowns provide excellent aesthetics, while PFM and metal crowns offer strength and durability.

5. How is the tooth prepared for a crown after an RCT?

• Answer: The tooth is typically reshaped or trimmed to make room for the crown. Impressions are taken, and a temporary crown may be placed while the permanent crown is fabricated.

6. Are there any precautions or considerations for selecting the restoration material after an RCT?

• Answer: Yes, several factors come into play, including the tooth’s location, the patient’s bite, and esthetic preferences. The dentist will consider these factors when choosing the most suitable crown material.

7. What are the potential complications if a restoration is delayed or not done after an RCT?

• Answer: Delaying or neglecting restoration after an RCT can lead to tooth fracture, further infection, and the need for more extensive dental work, possibly even tooth extraction.

8. Can a tooth with an RCT and crown still experience sensitivity or discomfort?

• Answer: It’s possible, but persistent discomfort or sensitivity is not common. It may indicate an issue with the restoration, like improper fit or a problem with the root canal treatment itself, which should be evaluated by a dentist.

9. How should patients care for their teeth after receiving a crown following RCT?

• Answer: Patients should maintain good oral hygiene by brushing, flossing, and attending regular dental check-ups. Avoiding hard or sticky foods and refraining from using teeth for activities like opening packages can also help prolong the crown’s lifespan.

10. Are there any long-term considerations for a tooth that has had an RCT and restoration? – Answer: A tooth with an RCT and proper restoration can last a lifetime with good care. Regular dental check-ups are essential to monitor the tooth’s health and the integrity of the restoration over time.

These questions and answers should provide a comprehensive understanding of the importance of restoration after a Root Canal Treatment (RCT) and the key considerations associated with it.

Viva Voice Questions in Amalgam for Dental Students

Certainly! Here are some common viva questions and answers related to materials used in Root Canal Treatment (RCT):

1. What is the purpose of materials used in Root Canal Treatment (RCT)?

• Answer: Materials used in RCT serve several purposes, including disinfection of the root canal, sealing the canal to prevent recontamination, and providing structural support to the tooth.

2. What is the primary material used to clean and shape the root canals during RCT?

• Answer: Dental instruments such as files and rotary instruments are primarily used to clean and shape the root canals. These instruments are usually made of stainless steel or nickel-titanium alloys.

3. What is the importance of irrigation solutions in RCT, and which solution is commonly used?

• Answer: Irrigation solutions are crucial for disinfection and debris removal. Sodium hypochlorite (NaOCl) is a commonly used irrigation solution due to its antimicrobial properties.

4. What is gutta-percha, and how is it used in RCT?

• Answer: Gutta-percha is a natural thermoplastic material used to fill and seal the cleaned root canals. It is heated and condensed into the canal space to create a hermetic seal.

5. Why is a root canal sealer necessary in RCT, and what is its role?

• Answer: A root canal sealer is used to fill the gaps and irregularities between gutta-percha cones and the canal walls. It helps ensure a complete seal, preventing bacterial recontamination.

6. What are the commonly used root canal sealers, and how do they differ?

• Answer: Common sealers include zinc oxide-eugenol-based sealers, resin-based sealers, and calcium hydroxide-based sealers. They differ in their composition, setting properties, and adhesion to gutta-percha.

7. Why is it important to select the appropriate size and taper of gutta-percha cones during RCT?

• Answer: Choosing the right size and taper ensures proper obturation (filling) of the root canal. This is crucial for achieving an effective seal and preventing leakage.

8. Can you briefly explain the role of temporary restorative materials used between RCT appointments?

• Answer: Temporary restorative materials are used to seal the access cavity created during RCT between appointments. They prevent contamination of the cleaned canals and maintain tooth structure.

9. How do you determine the success of a root canal treatment concerning the materials used?

• Answer: Success is determined by the absence of symptoms (pain, swelling) and by monitoring the healing of periapical lesions on follow-up X-rays. Proper use of materials contributes to the long-term success.

10. Are there any considerations for materials used in pediatric RCT compared to adult RCT? – Answer: Pediatric RCT may involve different materials, such as biocompatible sealers and gutta-percha cones suitable for primary teeth. Additionally, child-friendly temporary restorative materials may be used.

These questions and answers should provide a solid foundation for understanding the materials used in Root Canal Treatment (RCT) and their significance in the success of the procedure. Be prepared to provide more detailed explanations and examples during your viva examination.

Dental Materials Viva Voice Questions for BDS

Certainly! Here are some common viva questions and answers related to needles used in Root Canal Treatment (RCT):

1. What is the role of needles in Root Canal Treatment (RCT)?

• Answer: Needles are used in RCT to deliver local anesthesia to numb the tooth and surrounding tissues, ensuring a pain-free procedure.

2. What types of needles are commonly used for local anesthesia in RCT?

• Answer: Two common types of needles used in RCT are the aspirating syringe and the endodontic irrigation needle.

3. Can you explain the mechanism of action of the aspirating syringe needle in local anesthesia administration?

• Answer: The aspirating syringe needle has a harpoon-like mechanism that allows the dentist to aspirate (pull back) on the plunger to check for blood or tissue fluid, ensuring the needle is not in a blood vessel before injecting the anesthetic solution.

4. What are the advantages of using an endodontic irrigation needle in RCT?

• Answer: Endodontic irrigation needles are designed to deliver irrigating solutions deep into the root canals, helping to disinfect and clean the canals thoroughly.

5. Are there different sizes or gauges of needles used in RCT, and when would you choose one over the other?

• Answer: Yes, needles come in various sizes or gauges. Smaller gauge needles (e.g., 27-gauge) are often used for precision in the delivery of local anesthesia. Larger gauge needles (e.g., 18-gauge) may be used for irrigating root canals.

6. What are the safety precautions associated with using needles in RCT?

• Answer: Safety precautions include proper disposal of used needles in a sharps container, avoiding needlestick injuries, and adhering to infection control protocols.

7. Can you describe the technique for administering local anesthesia using an aspirating syringe in RCT?

• Answer: The technique involves inserting the needle into the appropriate injection site, aspirating to check for blood or tissue fluid, and then slowly injecting the anesthetic solution while observing the patient’s comfort.

8. Are there any complications or risks associated with needle use in RCT?

• Answer: Needle-related complications can include needlestick injuries to the dental professional and discomfort or bruising at the injection site for the patient. Proper technique and precautions help minimize these risks.

9. How do you ensure patient comfort during needle administration for local anesthesia in RCT?

• Answer: Patient comfort is achieved by using a topical anesthetic gel or spray on the injection site before the needle is inserted. Additionally, a gentle and reassuring approach can help alleviate anxiety.

10. What are the alternatives to needles for anesthesia in RCT, and when might they be considered? – Answer: Alternative methods include electronic anesthesia devices and intraosseous injection systems. They may be considered when the patient has needle phobia or other contraindications to traditional needle-based anesthesia.

These questions and answers should provide a comprehensive understanding of the role and use of needles in Root Canal Treatment (RCT) and related safety considerations. Be prepared to provide more detailed explanations and examples during your viva examination.

Viva Question and Answers in oral surgery

Certainly! Here are some common viva questions and answers related to files used in Root Canal Treatment (RCT):

1. What is the role of files in Root Canal Treatment (RCT)?

• Answer: Files are dental instruments used to clean, shape, and debride the root canals of a tooth during RCT. They help remove infected or damaged tissue and shape the canals for optimal filling.

2. What are the two primary types of files used in RCT, and how do they differ?

• Answer: The two primary types of files used in RCT are hand files and rotary files. Hand files are manually operated, while rotary files are motor-driven. Rotary files are generally faster and more efficient.

3. How are hand files different from rotary files in terms of their design and use?

• Answer: Hand files are typically made of stainless steel or nickel-titanium (NiTi) and are used manually in a filing motion. Rotary files are also made of NiTi but are used with a motorized handpiece, allowing for faster and more controlled movement.

4. Can you explain the importance of the NiTi (nickel-titanium) material in rotary files for RCT?

• Answer: NiTi files are flexible, allowing for better adaptation to the curved root canals. They are also more resistant to fracture compared to stainless steel files.

5. How do you determine the appropriate size and taper of the files for a specific tooth during RCT?

• Answer: The size and taper of the files are determined based on the tooth’s anatomy and the extent of infection. Dentists use diagnostic X-rays and clinical judgment to select the appropriate files.

6. What is the purpose of using multiple files with increasing sizes during RCT?

• Answer: Using files of increasing sizes gradually widens and shapes the root canals to facilitate proper cleaning and obturation (filling). This stepwise approach ensures thorough cleaning.

7. Are there any potential risks or complications associated with the use of files in RCT?

• Answer: Yes, there can be risks of over-instrumentation, perforation, or instrument separation. These risks are minimized through proper technique and careful monitoring.

8. How is a crown-down technique different from a step-back technique when using files in RCT?

• Answer: In the crown-down technique, the dentist starts with larger files and gradually works toward the apex of the root, while in the step-back technique, the dentist starts with smaller files and progressively increases their size. The choice depends on the case and dentist’s preference.

9. Can rotary files be sterilized and reused for multiple patients, or are they single-use instruments?

• Answer: Rotary files are typically single-use instruments. Reusing them carries a risk of cross-contamination and instrument wear, which can lead to reduced effectiveness.

10. How do you clean and maintain files to ensure their longevity and performance? – Answer: Files should be cleaned and sterilized after each use. Proper maintenance includes removing debris, lubricating with file-specific solutions, and inspecting for signs of wear or damage.

These questions and answers should provide a comprehensive understanding of the role and use of files in Root Canal Treatment (RCT) and the considerations related to their selection and maintenance. Be prepared to provide more detailed explanations and examples during your viva examination.