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Viva Question and Answers Related to Resin Impression Trays and Tray materials!

Here are 20 viva questions and answers related to resin impression trays and tray materials:

  1. Q: What are resin impression trays? A: Resin impression trays are dental devices used to carry and shape dental impression materials for accurately capturing the contours of a patient’s teeth and surrounding tissues.
  2. Q: What are the advantages of using resin impression trays? A: Resin trays are lightweight, durable, and can be customized for individual patients. They offer better rigidity than some other materials and are less likely to distort during the impression process.
  3. Q: How are resin impression trays different from metal trays? A: Resin trays are lighter, more comfortable for patients, and can be easily modified. Metal trays are heavier, rigid, and do not allow for chairside adjustments.
  4. Q: Can resin impression trays be autoclaved? A: Yes, most resin trays are autoclavable, which ensures proper sterilization between uses. Viva Question and Answers in Classification and uses of Casting Gold Alloys in Dentistry
  5. Q: What type of resin is commonly used for impression trays? A: Polymethyl methacrylate (PMMA) is a common type of resin used for impression trays due to its strength and biocompatibility.
  6. Q: How do you customize a resin impression tray for a patient? A: Resin trays can be softened with warm water and adapted to the patient’s arch by manually shaping them intraorally or using tray adhesive and pressure.
  7. Q: What is the purpose of holes or perforations in impression trays? A: Holes in trays allow excess impression material to escape, reducing the risk of trapping bubbles and ensuring an accurate impression.
  8. Q: Can resin impression trays be used for both alginate and silicone impressions? A: Yes, resin trays are versatile and can be used with various types of dental impression materials, including alginate and silicone.
  9. Q: What precautions should be taken when using resin trays with chemical-cure impression materials? A: Chemical-cure materials may generate heat during setting; it’s essential to ensure the tray is adequately cooled or use a separating medium to prevent adherence.
  10. Q: How should a dentist choose the size of an impression tray for a patient? A: The tray should cover all teeth in the arch without impinging on soft tissues. It should be selected based on the patient’s arch size and anatomy. Viva Question and Answers Related to the class 1 Dental Cavities
  11. Q: Can resin trays be used for partial edentulous impressions? A: Yes, resin trays can be trimmed and adapted to accommodate partial edentulous areas for accurate impressions.
  12. Q: What is the role of tray adhesive when using resin trays? A: Tray adhesive is applied to the inner surface of the tray to enhance material retention and prevent distortion during the impression process.
  13. Q: How can a dentist ensure the longevity of resin trays? A: Proper cleaning, sterilization, and careful handling contribute to the longevity of resin trays.
  14. Q: Can resin trays be used for dual-arch impressions? A: Yes, resin trays are suitable for dual-arch impressions, capturing both upper and lower arches simultaneously.
  15. Q: What is the ideal storage condition for resin impression trays? A: Store trays in a cool, dry place away from direct sunlight and chemicals to prevent degradation. Viva Question and Answers Related to Relining Resin Denture Bases
  16. Q: Can resin trays be used for both preliminary and final impressions? A: Yes, resin trays are versatile and can be employed for both preliminary and final impressions depending on the dentist’s preference and the clinical situation.
  17. Q: How does the flexibility of resin trays benefit the impression process? A: The slight flexibility of resin trays allows for easier removal from the mouth and minimizes the risk of distortion during removal.
  18. Q: Are there any contraindications for using resin trays? A: Resin trays may not be suitable for patients with allergies to the materials used, and in such cases, alternative materials should be considered.
  19. Q: Can resin trays be used for implant impressions? A: Yes, resin trays can be adapted for implant impressions, but careful attention is needed to ensure accurate positioning and stability.
  20. Q: What are some common troubleshooting issues when using resin trays, and how can they be addressed? A: Common issues include poor adaptation and material tearing. These can be addressed by ensuring proper tray customization and using appropriate tray adhesive to enhance material retention.

 

 

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