Dental Handpieces and Accessories Quiz
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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?

<p>A metal shaft on which a sandpaper disc or other abrasive materials are mounted.</p> Signup and view all the answers

What part of an instrument connects the handle to the working end?

<p>Shank</p> Signup and view all the answers

What is torque?

<p>A turning or twisting force.</p> Signup and view all the answers

What does ultrasonic refer to?

<p>Mechanical radiant energy of water and sound vibrations used to break down material or tissue.</p> Signup and view all the answers

How did the first dental handpiece operate?

<p>It was belt driven.</p> Signup and view all the answers

What are the two most common types of dental handpieces?

<p>High-speed and low-speed.</p> Signup and view all the answers

How fast can the low-speed handpiece rotate?

<p>10,000 to 40,000 RPM.</p> Signup and view all the answers

Which attachment is used to hold the latch type bur?

<p>The contra angle attachment.</p> Signup and view all the answers

How fast does the high-speed handpiece operate?

<p>Up to 450,000 RPM.</p> Signup and view all the answers

How is the tooth kept cool and clean during the use of the high-speed handpiece?

<p>With a water coolant system.</p> Signup and view all the answers

What type of bur locking system is found on the high-speed handpiece?

<p>A friction lock.</p> Signup and view all the answers

What helps illuminate the working field on the high-speed handpiece?

<p>A fiber optic light.</p> Signup and view all the answers

What type of handpiece resembles a sandblaster?

<p>The air abrasion handpiece.</p> Signup and view all the answers

What kind of shank fits into the contra angle attachment?

<p>A latch type shank.</p> Signup and view all the answers

Restorative burs are made from what material?

<p>Tungsten carbide.</p> Signup and view all the answers

What design of bur is a 33 1/2?

<p>Inverted cone.</p> Signup and view all the answers

What gives the diamond bur its advantage?

<p>Its cutting ability.</p> Signup and view all the answers

Finishing burs are used on what type of dental material?

<p>Esthetic materials.</p> Signup and view all the answers

What is used to hold a disc in the handpiece?

<p>A mandrel.</p> Signup and view all the answers

This type of bur is designed with no retention grooves in the shank end to lock it into the handpiece.

<p>Friction grip.</p> Signup and view all the answers

This handpiece utilizes a beam of light to cauterize soft tissue or to vaporize decayed tooth structure.

<p>Laser.</p> Signup and view all the answers

This instrument is defined as a part or device that rotates around its axis.

<p>Rotary.</p> Signup and view all the answers

These are grooves in the cutting portion of a bur that resemble pleats.

<p>Flutes.</p> Signup and view all the answers

This is a free-standing cabinet that is used to hold something.

<p>Console.</p> Signup and view all the answers

This kind of bur is rigid and stronger than a steel bur and remains sharper for longer periods.

<p>Tungsten carbide.</p> Signup and view all the answers

The narrow portion of the bur that fits into the handpiece is called what?

<p>Shank.</p> Signup and view all the answers

This bur has a shank with a small groove at the end that mechanically locks into a contra angle attachment.

<p>Latch type.</p> Signup and view all the answers

The high-speed handpiece has this kind of lighting system to shed light on the tooth during use.

<p>Fiber optic.</p> Signup and view all the answers

This handpiece provides mechanical energy that creates water and sound vibrations.

<p>Ultrasonic.</p> Signup and view all the answers

The twisting or turning of the internal components of a handpiece is referred to as what?

<p>Torque.</p> Signup and view all the answers

Sandpaper discs are mounted onto what?

<p>A mandrel.</p> Signup and view all the answers

How did the first handpiece operate?

<p>It was driven by a belt.</p> Signup and view all the answers

What is the most versatile handpiece in dentistry?

<p>The low-speed handpiece.</p> Signup and view all the answers

How fast does the low-speed handpiece rotate?

<p>10,000 to 40,000 RPM.</p> Signup and view all the answers

What attachment on the low-speed handpiece is used to hold a latch type bur?

<p>Contra angle.</p> Signup and view all the answers

How fast does the high-speed handpiece rotate?

<p>Up to 450,000 RPM.</p> Signup and view all the answers

During cavity preparation, how does the high-speed handpiece keep the tooth at a proper temperature and free of debris?

<p>Water coolant system.</p> Signup and view all the answers

A bur is held in place in the high-speed handpiece with what?

<p>Friction grip.</p> Signup and view all the answers

On the high-speed handpiece, this helps illuminate the working field.

<p>Fiber optic light.</p> Signup and view all the answers

What type of handpiece resembles a sandblaster?

<p>The air abrasion handpiece.</p> Signup and view all the answers

This bur fits into the lab handpiece.

<p>Long shank bur.</p> Signup and view all the answers

Restorative burs are commonly manufactured from what material?

<p>Tungsten carbide.</p> Signup and view all the answers

What design of bur is a 33 1/2?

<p>Inverted cone.</p> Signup and view all the answers

This is the advantage of a diamond bur.

<p>Its cutting ability.</p> Signup and view all the answers

A finishing bur is commonly used on what type of restorative material?

<p>Composite resin / esthetic materials.</p> Signup and view all the answers

The low-speed handpiece would be equipped with this to hold a sandpaper disc.

<p>A mandrel.</p> Signup and view all the answers

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.

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