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The working end may be
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BASIC CHAIRSIDE

INSTRUMENTS AND TRAY SYSTEMS

QuestionAnswer
The working end may be point,blade,or nib
blade may be flat or curved and rounded or cutting edge
the cutting edge is formed by a bevel on the working end of the instrument.
the part of the dental hand instrument. handle,shank,working end
which part of the instrument actually performs the specific function of the instrument working end
formula was developed to standardize the exact size and angulation of an instrument black's
following are cutting instruments chisel,excavator,angle former
following are noncutting instruments carver,carrier,file
black's three number formula -the first number is the width of the blade,-the second number is the measurement of length of blade,-third number provides measurement of angle of the blade to the long axis of the handle
hand cutting instruments are used to assist in the design of the cavity preparation
chisels are used to shape and plane enemal and dentin walls of the cavity preparation
hatchet are paired left and rigth and used in a downward motion to refine the cavity walls
Hoe is used in the a pulling motion and shape the floor of the cavity preparation
gingival margin trimmer is similar to the HATCHET in regard to the position of the position ofthe blade to the handle,is used to bevel the gingival margin wall of the cavity preparation
angle former is used in downward pushing motion to form and define point angles and to shapen line.
excavator is used to remove carious material,has a cutting edge that is rounded all the way
basic examination setup instruments are common to all tray setups
basic examination setup instrument mouth mirror,explorer,cotton plier
type of mouth mirror are the plane surface,front surface and concave surface
what the operator use to view area of the mouth not visible with direct vision indirect vision
the mirror is used to direct the light to reflect and detect fractures in tooth transillumination
which instrument working end is thin,sharp pint of flexible steel exporer
cotton plier are used to transport and manipulate various material,they are also available locking and nonlocking handles
the probe workin end consists of rounded or blunted blade that is marked in millimiters
amalgam carrier designed to carry and dispense amalgam into cavity preparation
condensers are used to remove excess restorative material and to carve tooth anatomy in the restoration
knives are used to trim excess filling material is finishing
spatulas are used to mix composite resin material is? plastic
characteristic of crowns and collar scissors are trim matrix,cut retraction cord,trim amalgam
the neck of the bur is inserted into the handpiece
the head of the bur is the working end of the bur
cutting burs have 6 cutting blades or surfaces
there are 9 basic cutting bur shapes
Diamond burs or stones are used for rapid reducing tooth structure during cavity preparation ,polishing and finishing composite restorations and occlusial
abrasives are nonbladed instruments used finish and polish restoration
following instruments have abrasive material that may be made of garnet,diamond and quartz discs
diamond discs are used for rapid cutting and have diamond particles bonded to both sides of steel discs.
working end of the handpiece is where burs,stones,and attachments are held
following will reducefrictional heat from the use of the high speed -air,water,air-water spray
the chuck holds the shank portion of the bur in place
what will activate and control the speed of the handpiece rheostat
the low-speed handpiece is often called straight handpiece
at the dental unit,the low -speed handpiece will not polish appliances
which of the following cannot be sterilized sandpaper discs
high-speed handpieces operate at 400,000 rpm
preset tray provides an efficient means of transportating instruments
the wedelstaedt chisel is used for class III or IV cavity preparation
dental handpiece is used for removing dental decay,polishing teeth,polishing and finishing restoration except probing
Created by: fifisolange
 

 



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