Pictured: MIDWEST Bur. Photo courtesy DENTSPLY International, York, PA.
Instrument
Bur
Function
To be used in high-speed or low-speed handpiece
Characteristics
Parts:
1. Head: Part of bur that cuts, polishes, or finishes
Available in a variety of shapes and sizes
2. Neck: Part of bur that tapers to connect shank to head
3. Shank: Part of bur that is inserted into the handpiece
• Length and style of shank will vary depending on handpiece used.
• Bur with straight, long shank fits into straight slow-speed handpiece.
• Bur with latch-type shank fits into contra-angle slow-speed handpiece (friction grip bur shown).
• Friction grip bur fits into high-speed handpiece; chuck, lever, or push button tightens bur into the handpiece.
• Bur with long shank used for surgical procedures
Burs must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
Instrument
Bur shanks
Function
To insert shank part of bur into handpiece
Characteristics
Fit a variety of shanks into different styles of handpiece
Working or cutting end of the bur could be the same style and/or size, but shank could be different according to handpiece used.
Example:
1. No. 2 round bur in straight shank
2. No. 2 round bur in latch-type shank
3. No. 2 round bur in friction grip shank
Long shank used for surgical procedures
Burs must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
Pictured: MIDWEST Round Bur. Photo courtesy DENTSPLY International, York, PA.
Instrument
Round bur
Functions
To remove caries from tooth structure
To open tooth for endodontic treatment
To place retention in cavity preparation
To use for many procedures on a tooth
Characteristics
Range of sizes
Commonly used sizes: No. 1⁄4 to No. 10
Practice notes
Bur is inserted and secured in a handpiece.
Type of handpiece determines type of shank used.
Round Bur must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
Pictured: MIDWEST Pear-Shaped Bur. Photo courtesy DENTSPLY International, York, PA.
Instrument
Pear-shaped bur
Functions
To open tooth for a restoration
To remove caries
Characteristics
Frequently used in preparation of composite restorations
Range of sizes
Commonly used sizes: No. 330 to No. 333
Bur head available in long
Example:
No. 333L
Practice notes
Bur is inserted and secured in a handpiece.
Type of handpiece determines type of shank used.
Pear-Shaped Bur must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
Inverted Cone Bur must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
To place retention grooves in walls of cavity preparation
Characteristics
Cutting part of bur—Has parallel sides
Range of sizes—Commonly used: No. 56, No. 57, No. 58
May have short or long (L) shank for adaptation to a variety of cavity preparations
Examples of short- and long-shank friction-grip burs:
No. 56S, No. 56L
Practice notes
Bur is inserted and secured in a handpiece.
Type of handpiece determines type of shank used.
Straight Fissure Bur—Plain Cut must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
To place retention grooves in walls of cavity preparation
Characteristics
Cutting part of bur—Has tapered sides
Range of sizes—Commonly used: No. 168, No. 169, No. 170, No. 171
May have short (S) or long (L) shank for adaptation to a variety of cavity preparations
Examples of short- and long-shank friction-grip burs:
No. 168S, No. 171L
Practice notes
Bur is inserted and secured in a handpiece.
Type of handpiece determines type of shank used.
Tapered Fissure Bur—Plain Cut must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping, or the used bur must be disposed of in a Sharps container.
Only gold members can continue reading. Log In or Register to continue