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