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42 Cards in this Set
- Front
- Back
First Dental Handpiece
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Operated by long belt, running over series of pulleys to the motor
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Dental Handpiece
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electric instrument used to hold rotary instruments
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Bur is made of
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Steel or tungsten carbide
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Rotary
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part or device that rotates around an axis
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2 most common types of handpieces
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*High Speed
*Low Speed (aka slow speed or straight hand piece) |
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Low Speed (Straight hand piece)
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*one of the most versatile
*two sizes (standard length for lab & shorty for prophy |
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10,000 - 30, 000 Rpm
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Low Speed Handpiece
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Clinical Uses for Low Speed
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*removes soft decay & fine finishes cav prep
*resto finishing & polishing *Coronal polish & removes stains *porcelain adj *Endo treatment |
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Lab Uses for Low Speed
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*Trim & contour Temp Crown
*Trim & relining of removable partial/dentures *Trim & contour ortho applainces |
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Straight Attachment
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most commonly used in Lab, trim provisionals
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Contra Angle Attachment
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*slides directly onto low speed & locks into place
*holds latch type rotary instruments,endo files, prophy cups & mandrels |
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Prophy Angles
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Used for polishing to hold prophy cup & brittle brush
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450,000 Rpm
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High- Speed (has no attachments)
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Uses for High-Speed (used in all restos)
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*Removs decay
* Removes diseased tooth structure or faulty restos *Reduces Crown for prep for Crown or Bridge *Prep outline & retention grooves *Finish & polishing |
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Water coolant System
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constantly sprays tooth and bur with cool water while operating hi speed, protecting pulp from damage
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Friction Grip Bur
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used with high speed handpiece
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Latch Type Bur
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used with low speed hand piece
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Fiber Optic Lighting
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mounted in head of high speed
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Ultrasonic handpiece
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mechanical radiant energy of water & sound vibes creats pulsating effect on tooth surface
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Laser handpiece
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uses beam of laser light to cauterize soft tissue or vapourize decayed tooth structure
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Air Abrasion Handpiece
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sandblaster removes stain & tooth decay ( aluminum oxide particles)
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*Sealants
*External Stain removal *Class I-VI prep *Endo Access *Crown Margins & prep for cementation |
Air Abrasion Technique most effective for
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Torque (lab handpieces)
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twisting or turning force
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Dental handpiece
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Identified as Critical Instrument ( comes in contact with blood saliva & tissue)
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Types of Burs
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*Friction Grip.............High sp
*Latch type.................Lo sp *Long straight lab.......Lo sp |
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3 basic rotary instrument (bur) parts
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*Shank
*Neck *Head |
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Shank (on bur)
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portion of bur that fits into handpiece
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Neck (on bur)
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narrow portion connecting Shank & Head of bur
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Head (on bur)
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cutting,polishing or finishing portion of bur
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Burs
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rotary instrument that have a sharp cutting head
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Bur use in dentistry
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*tooth prep
*excavating decay *finishing cavity walls, rest surface, crown prep *remove old filling *separating cr&br |
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Tungsten Carbide
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replaced steel in bur for cav prep
Stiffer & stronger than steel remaining sharper longer |
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Diamond Burs
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metal base with flecks of industrial diamonds embedded into base
have greater cutting ability |
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Diamond Round
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provides access to pulp chamber
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Diamond Flat End Taper & Diamond Flame
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reduces tooth structure for crown prep
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Diamond Wheel
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remakes subgingival bevels in a crown prep
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Finishing Bur
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similar to cutting but has more "flutes" (number of blades)
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Mandrel
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metal shaft that mounts sandpaper disc or other abrasive materials
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Rubber Points
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polishing disc comes in various abrasiveness usually brown, green to white
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Sandpaper Disc
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used for finishing & polishing rests
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Lab burs
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longer shank & longer head
acrylic bur most common |
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laser
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fiberoptic cable that produces laser light
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