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Viva Question and Answers Related to Finishing and Polishing Instruments Used in Dentistry

Here are 50 viva questions and answers related to finishing and polishing instruments used in dentistry:

  1. What is the purpose of finishing and polishing in dentistry?
    • The purpose is to refine and enhance the final surface of restorations, ensuring proper function and aesthetics.
  2. Name a common material used in dental finishing and polishing instruments.
    • Diamond particles are commonly used in finishing and polishing instruments.
  3. What is the difference between finishing and polishing?
    • Finishing involves contouring and shaping restorations, while polishing focuses on achieving a smooth and shiny surface.
  4. Why is finishing and polishing important for dental restorations?
    • It enhances aesthetics, reduces plaque retention, and improves the longevity of restorations.
  5. What type of burs are commonly used for finishing procedures?
  6. How do you select the appropriate abrasive for finishing a restoration?
    • It depends on the material of the restoration. For example, use coarse abrasives for metal and fine abrasives for composites.
  7. What is the purpose of using a rubber dam during finishing and polishing procedures?
    • It prevents contamination and ensures a dry field for better visibility and precision.
  8. Explain the role of water spray during finishing and polishing.
    • It helps cool the instruments, prevent overheating, and remove debris.
  9. What is a burnisher, and when is it used in dental procedures?
    • A burnisher is a smooth, rounded instrument used to polish and smooth the surface of restorations, typically after finishing.
  10. How do you prevent over-contouring while finishing a restoration?
  11. What are the potential consequences of over-polishing dental restorations?
    • Over-polishing can lead to thinning of the restoration, compromising its strength and longevity.
  12. Explain the term “orange peel” in the context of dental finishing.
    • “Orange peel” refers to a textured surface that may result from over-polishing, resembling the skin of an orange.
  13. What is the purpose of using a disclosing solution during finishing and polishing?
    • It helps identify areas that require further attention by highlighting remaining surface irregularities.
  14. How can you achieve a high-gloss finish on composite restorations?
    • Use a sequence of progressively finer abrasive disks or rubber cups with polishing compounds.
  15. What is a porcelain polishing brush, and when is it commonly used?
    • It is a brush with soft bristles used for polishing porcelain restorations after adjustments.
  16. How do you address surface roughness on a metal restoration during finishing?
    • Use abrasive disks or points with the appropriate grit to smooth the surface.
  17. What is the purpose of using a felt wheel in dental polishing?
    • Felt wheels are used with polishing compounds to achieve a high shine on metal surfaces.
  18. When is a porcelain polishing point used in dentistry?
    • It is used for precise polishing of porcelain restorations, especially in areas that are hard to reach with larger instruments.
  19. Explain the term “overheating” in the context of finishing and polishing.
  20. How do you determine the appropriate time to switch from finishing to polishing?
    • Finishing is complete when the desired contour is achieved. Polishing is initiated when no further adjustments are needed.
  21. What is the purpose of using a slow-speed handpiece for finishing and polishing?
    • A slow-speed handpiece allows for better control and reduces the risk of overheating during the finishing and polishing process.
  22. How does the choice of polishing agent vary for metal and composite restorations?
    • Metal restorations often use polishing compounds, while composite restorations may require specific polishing pastes or discs.
  23. What are spiral wheels, and when are they commonly used in dental polishing?
    • Spiral wheels are abrasive wheels used for gross reduction and contouring during finishing.
  24. How do you achieve a smooth interproximal surface during finishing and polishing?
    • Use fine abrasive strips or disks designed for interproximal areas to achieve a smooth surface.
  25. Explain the term “glazing” in the context of finishing porcelain restorations.
    • Glazing involves using a specific porcelain glaze to achieve a smooth and glossy surface on porcelain restorations.
  26. What is the purpose of using a goat hair brush in dental polishing?
    • A goat hair brush is used for applying polishing agents to achieve a high shine on restorations.
  27. How do you manage excessive bleeding during finishing and polishing procedures?
  28. What precautions should be taken when using diamond burs for finishing?
    • Ensure proper water cooling, use light pressure, and avoid excessive heat generation.
  29. Why is it essential to check occlusion after finishing and polishing procedures?
    • Checking occlusion ensures that the restoration does not interfere with the patient’s bite, preventing discomfort and potential complications.
  30. What is the purpose of using a rag wheel in dental finishing?
    • A rag wheel, often made of muslin, is used for applying polishing compounds to achieve a smooth and shiny surface on restorations.
  31. How do you avoid creating sharp angles during finishing procedures?
    • Use round or flame-shaped burs to avoid creating sharp angles that can compromise the strength of the restoration.
  32. What is the significance of using a cross-cut fissure bur during finishing?
    • A cross-cut fissure bur helps in efficient material removal and contouring during finishing.
  33. How do you achieve proper marginal adaptation during finishing and polishing?
    • Carefully contour and polish the restoration to ensure a seamless fit with the surrounding tooth structure.
  34. When is air polishing used in dental procedures, and what precautions should be taken?
    • Air polishing is used for stain removal and polishing. Precautions include protecting the eyes and avoiding excessive pressure.
  35. How does the speed of a handpiece impact the finishing and polishing process?
  36. What is the purpose of using a finishing bur with a rounded tip?
    • A rounded-tip finishing bur is used to create smooth transitions and contours without sharp angles.
  37. How do you manage excessive heat generation during finishing and polishing procedures?
    • Use intermittent contact, ensure proper water cooling, and pause periodically to allow the restoration to cool.
  38. What are the potential complications of inadequate finishing and polishing?
    • Complications may include rough surfaces, poor aesthetics, increased plaque accumulation, and compromised restoration longevity.
  39. Explain the term “occlusal adjustment” in the context of finishing procedures.
    • Occlusal adjustment involves refining the occlusal surfaces of restorations to ensure proper bite and function.
  40. How do you address localized staining on a composite restoration during polishing?
  41. What is the purpose of using a carbide bur in finishing procedures?
    • Carbide burs are used for efficient material removal and contouring during the initial stages of finishing.
  42. How does the particle size of polishing agents affect the final result?
    • Finer particles produce a smoother and shinier surface, while coarser particles are used for initial contouring and shaping.
  43. Why is it important to use a light touch during finishing and polishing?
    • A light touch prevents excessive material removal, overheating, and damage to the restoration.
  44. How do you achieve proper interproximal contact during finishing procedures?
    • Use fine abrasive strips or disks to carefully adjust and polish interproximal surfaces while maintaining proper contact.
  45. What is the purpose of using a silicone point in dental polishing?
  46. How can you avoid creating undercuts during finishing procedures?
    • Maintain a smooth and gradual contour, avoiding abrupt changes in shape that may result in undercuts.
  47. Explain the term “water-cooled” in the context of finishing instruments.
    • Water-cooled instruments have a built-in water spray system to prevent overheating and maintain a cool working environment.
  48. What precautions should be taken when finishing and polishing a restoration in a pediatric patient?
    • Use age-appropriate techniques and instruments, ensure a comfortable and calming environment, and consider the child’s cooperation level.
  49. How do you address excessive vibration during finishing and polishing procedures?
    • Check for instrument damage, ensure proper handpiece maintenance, and use a light touch to minimize vibration.
  50. What is the role of patient education in post-operative care after finishing and polishing procedures?

Remember, these questions and answers serve as a comprehensive guide, and it’s crucial to adapt them based on the specific curriculum or guidelines of your dental program.

 

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