Podcast
Questions and Answers
What is the role of the face of the blade in a bur?
What is the role of the face of the blade in a bur?
- It is an imaginary line tangent to the lip of the blade and 1 to radius
- It meets the cut structure as the leading side (correct)
- It is an imaginary line passing through the tip of the blade and the center of rotation
- It follows the back of the blade as the trailing side
What is the significance of the radius of the blade in a bur?
What is the significance of the radius of the blade in a bur?
- It is an imaginary line passing through the tip of the blade and the center of rotation (correct)
- It provides better cutting efficiency but on expense of the bulk of the blade
- It is an imaginary line tangent to the lip of the blade and 1 to radius
- It is the angle between the face and back of the blade
What does positive rake angle indicate in a bur?
What does positive rake angle indicate in a bur?
- The radial line is ahead of the face of the blade, providing better cutting efficiency (correct)
- The angle between face and back of the blade
- The radial line is overlying the face of the blade, resulting in moderate cutting efficiency
- The radial line trails the face of the blade, producing minimal cutting efficiency
What is eccentricity or run-out in relation to a dental instrument?
What is eccentricity or run-out in relation to a dental instrument?
What factor enhances cutting efficiency and acts as a lubricant during cavity preparation?
What factor enhances cutting efficiency and acts as a lubricant during cavity preparation?
What is one possible adverse effect associated with increased speed of rotary instruments?
What is one possible adverse effect associated with increased speed of rotary instruments?
What is one reason for utilizing carbide burs with regular and ultra-high speed handpieces?
What is one reason for utilizing carbide burs with regular and ultra-high speed handpieces?
In dental bur classification, what does 'smart prep burs' refer to?
In dental bur classification, what does 'smart prep burs' refer to?
What does frictional grip attachment for burs specifically indicate?
What does frictional grip attachment for burs specifically indicate?
What are steel burs primarily used with due to potential damage at higher speeds?
What are steel burs primarily used with due to potential damage at higher speeds?
What type of burs are used for lateral extension of cavity walls by undermining enamel?
What type of burs are used for lateral extension of cavity walls by undermining enamel?
What modification has been made to reduce unduly rough surfaces produced by cross-cuts on fissure burs at high speeds?
What modification has been made to reduce unduly rough surfaces produced by cross-cuts on fissure burs at high speeds?
What is the rotational speed of an instrument measured in?
What is the rotational speed of an instrument measured in?
Which speed range is generally recognized for rotary cutting instruments?
Which speed range is generally recognized for rotary cutting instruments?
What type of speed range is used for tooth preparation and removing old restorations?
What type of speed range is used for tooth preparation and removing old restorations?
Why is the low-speed range used for cleaning teeth, caries excavation, and finishing and polishing procedures?
Why is the low-speed range used for cleaning teeth, caries excavation, and finishing and polishing procedures?
What is a disadvantage of using low-speed cutting?
What is a disadvantage of using low-speed cutting?
Why are brittle carbide burs easily broken at low speeds?
Why are brittle carbide burs easily broken at low speeds?
What are the advantages of using high or ultra high speeds for tooth preparation?
What are the advantages of using high or ultra high speeds for tooth preparation?
Why is the number of cutting instruments used reduced when using higher speeds?
Why is the number of cutting instruments used reduced when using higher speeds?
What is a benefit of using high or ultra high speeds for tooth preparation in terms of instrument longevity?
What is a benefit of using high or ultra high speeds for tooth preparation in terms of instrument longevity?
Why are patients less apprehensive when higher speeds are used for tooth preparation?
Why are patients less apprehensive when higher speeds are used for tooth preparation?
