MDA Chapter 35 Notes
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1940s
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The first dental handpiece was introduced in the:
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Dental handpiece
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The most frequently used device in restorative dentistry is the:
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Low-speed
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This handpiece operates at 10,000 to 30,000 rpm.
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Low-speed
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The handpiece that can operate both forward and backward and can be used with a variety of attachments:
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Prophylaxis angle
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This attaches to the low speed handpiece and is used to polish the teeth:
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High-speed
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This handpiece operates from air pressure and reaches speeds up to 450,000 RPM:
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Water coolant
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A high speed handpiece can generate enough frictional heat on a tooth to cause possible damage to the pulp, therefore this is used:
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Friction-grip
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The high-speed handpieces use these type of burs:
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Scaling
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The ultrasonic handpiece is used for:
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Laser handpiece
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An advantage when treatment is usually painless and anesthesia is unnecessary necessary, is a characteristic of:
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Air abrasion technique
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This uses a high-pressure delivery of aluminum oxide particles through a small probe to remove tooth structure:
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Laboratory handpiece
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The handpiece that has the greatest torque:
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Lubricate
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When cleaning a dental handpiece, it is important to do this before sterilization:
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Critical instrument
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A dental handpiece is identified as this, which must be sterilized before reuse:
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shank, neck, and head
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Parts of a rotary instrument:
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Friction-grip
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Shank that is short and smooth and has no retention grooves in the end; held in the high-speed handpiece by the creation of friction that grips the entire shank:
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Bur
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Rotary instruments that have a sharp cutting head
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Tungsten carbide
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Since the late 1940s, these burs have been uses for cavity preparation:
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Round
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Type of bur used to remove decay during tooth preparation:
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Pulp chamber
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A round-shaped diamond rotary instrument provides access to this:
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Finishing bur
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Bur that has more blades on the working end than a restorative bur because it is used for final stage polishing of a restoration:
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Abrasive rotary instruments
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The most varied category of rotary instruments:
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Laboratory burs
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These burs have a longer shank and a larger head than dental burs:
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Mandrel
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Because abrasive discs and wheels are supplied separately and not attached to a shank, this is used to attach abrasives to the dental handpiece:
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Cutting, grinding, and polishing
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Rotary instruments were introduced in dentistry in the 1940s to complement the use of hand instruments in these procedures:
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Low-speed and high-speed
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The two most common types of dental handpieces:
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Low-speed handpiece
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Finishing and polishing restorations, root canal treatment, coronal polishing and removal of stains are all uses of this handpiece:
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High-speed handpiece
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This handpiece can reach 450,000 rpm:
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High-speed handpiece
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A Friction-grip rotary instrument shank is placed into this handpiece:
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Low-speed handpiece
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A porcelain adjustment is made with this handpiece:
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Ultrasonic
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The handpiece that uses mechanical, radiant water energy and Sound Vibrations to create a pulsating effect on a tooth surface for the removal of calculus and stains:
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Laser handpiece
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This uses a beam of light to cauterize soft tissue and vaporize decayed tooth structure
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#557 bur
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A straight fissure cross-cut is used for forming internal walls of the preparation
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699
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This type (#) of bur helps to provide angles to the walls of the cavity preparation with retention grooves
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Diamond rotary instruments
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These have a metal base with flecks of industrial diamonds; they increase cutting ability; they shorten preparation time and increase productivity:
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Latch-type
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This type of shank fits into the Contra-angle attachment for a Low-speed handpiece:
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Mandrel
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The metal shaft on which sandpaper disks and other abrasives are mounted:
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Finishing burs
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Flame-shaped, round-shaped, and tapered are these types of burs:
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#170 bur
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Used to provide angles to the walls of a cavity preparation:
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Acrylic bur
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The most commonly used bur in the dental laboratory:
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Esthetic materials
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This type of restoration material requires finishing burs as well as sandpaper disks and cuttlebone point to finish and polish:
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Tungsten carbide
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Restorative burs are made from this material:
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Air abrasion handpiece
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These handpieces are most effective when used for external stain removal and sealants.
