Questions and Answers
A rotary cutting instrument is called a ______.
bur
What is a dental handpiece?
An electrical instrument used to hold rotary instruments.
The blades on the working end of a finishing rotary instrument are called ______.
flutes
What is a mandrel?
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What part of an instrument connects the handle to the working end?
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What is torque?
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What does ultrasonic refer to?
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How did the first dental handpiece operate?
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What are the two most common types of dental handpieces?
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How fast can the low-speed handpiece rotate?
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Which attachment is used to hold the latch type bur?
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How fast does the high-speed handpiece operate?
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How is the tooth kept cool and clean during the use of the high-speed handpiece?
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What type of bur locking system is found on the high-speed handpiece?
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What helps illuminate the working field on the high-speed handpiece?
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What type of handpiece resembles a sandblaster?
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What kind of shank fits into the contra angle attachment?
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Restorative burs are made from what material?
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What design of bur is a 33 1/2?
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What gives the diamond bur its advantage?
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Finishing burs are used on what type of dental material?
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What is used to hold a disc in the handpiece?
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This type of bur is designed with no retention grooves in the shank end to lock it into the handpiece.
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This handpiece utilizes a beam of light to cauterize soft tissue or to vaporize decayed tooth structure.
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This instrument is defined as a part or device that rotates around its axis.
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These are grooves in the cutting portion of a bur that resemble pleats.
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This is a free-standing cabinet that is used to hold something.
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This kind of bur is rigid and stronger than a steel bur and remains sharper for longer periods.
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The narrow portion of the bur that fits into the handpiece is called what?
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This bur has a shank with a small groove at the end that mechanically locks into a contra angle attachment.
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The high-speed handpiece has this kind of lighting system to shed light on the tooth during use.
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This handpiece provides mechanical energy that creates water and sound vibrations.
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The twisting or turning of the internal components of a handpiece is referred to as what?
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Sandpaper discs are mounted onto what?
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How did the first handpiece operate?
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What is the most versatile handpiece in dentistry?
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How fast does the low-speed handpiece rotate?
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What attachment on the low-speed handpiece is used to hold a latch type bur?
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How fast does the high-speed handpiece rotate?
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During cavity preparation, how does the high-speed handpiece keep the tooth at a proper temperature and free of debris?
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A bur is held in place in the high-speed handpiece with what?
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On the high-speed handpiece, this helps illuminate the working field.
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What type of handpiece resembles a sandblaster?
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This bur fits into the lab handpiece.
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Restorative burs are commonly manufactured from what material?
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What design of bur is a 33 1/2?
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This is the advantage of a diamond bur.
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A finishing bur is commonly used on what type of restorative material?
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The low-speed handpiece would be equipped with this to hold a sandpaper disc.
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Study Notes
Dental Handpieces and Accessories
- Bur: Rotary cutting instruments made of steel or tungsten carbide.
- Dental Handpiece: Electrical devices that hold rotary instruments for drilling and oral procedures.
- Flutes: Blades on finishing rotary instruments resembling pleats, essential for cutting action.
- Mandrel: Metal shaft used to mount abrasive materials like sandpaper discs.
- Shank: The portion where the handpiece handle connects to the working end of the instrument.
- Torque: Refers to the force that causes rotation or twisting in the handpiece.
- Ultrasonic: Refers to the mechanical radiant energy created using water and sound vibrations, used for material breakdown.
- First Dental Handpiece Mechanism: Initially operated on a belt-driven system.
- Types of Handpieces: High-speed and low-speed variants are the most common in dental practice.
- Low-Speed Handpiece RPM: Rotates between 10,000 to 40,000 revolutions per minute (RPM).
- Contra Angle Attachment: Used to hold latch-type burs securely in a handpiece.
- High-Speed Handpiece RPM: Capable of operating up to 450,000 RPM.
- Cooling System: High-speed handpieces utilize a water coolant system to maintain tooth temperature.
- Bur Locking System: High-speed handpieces typically employ a friction lock for securing burs.
- Illumination: Fiber optic lights in high-speed handpieces enhance visibility during procedures.
- Air Abrasion Handpiece: Functions similarly to a sandblaster for material removal.
- Latch Type Shank: Specifically used to fit into the contra angle attachment.
- Restorative Burs Material: Commonly made from tungsten carbide for durability and effectiveness.
- Bur Design (33 1/2): Inverted cone design used in specific dental applications.
- Diamond Bur: Known for superior cutting ability, enhancing efficiency during procedures.
- Finishing Burs Use: Primarily utilized on esthetic restorative materials like composites.
- Mandrel Usage: Employed to secure sandpaper discs within the handpiece.
- Friction Grip: A type of bur designed without grooves for secure fitting into high-speed handpieces.
- Laser Handpiece: Utilizes light beams for cauterization and decay removal.
- Rotary Definition: Refers to any instrument that spins around its axis for cutting or polishing.
- Console: Free-standing cabinetry specifically designed to hold dental instruments.
- Bur Composition: Tungsten carbide burs are preferred due to their strength and longevity.
- Bur Shank: The narrow portion fitting into the handpiece, critical for stability.
- Latch Type Bur: Features a small groove for mechanically locking into the contra angle attachment.
- Temperature Control: Water coolant systems are essential in high-speed handpieces during cavity preparations to prevent overheating.
- Long Shank Bur: Specifically designed for lab handpieces to accommodate different applications.
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Description
Test your knowledge on dental handpieces and their accessories. This quiz covers essential terms and components such as burs, flutes, ultrasonics, and the types of handpieces used in dentistry. Perfect for dental students and practitioners looking to refresh their understanding of dental tools.
