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Chapter 18 DAC

basic chairside instruments and tray systems

Hatchet there is an angle in the shank of the hatchet and the blade is flat. Its used in a downward motion to refine the cavity walls and to obtain retention in the cavity preparation
Hoe used in a pulling motion to smooth and shape the floor of the cavity preparation. shaped with straight and angled shanks and all of them have cutting edges
Wedelstaedt a type of chisel that have slightly curved shanks and are used for class 3 and 4 cavity preparations
Bin-angle a two angle shape of the shank used in posterior areas of the oral cavity
Tapered Fissure Straight forms divergent walls of the cavity preparation. the tip is cone form that comes to a point at the tip. there is no there are no cuts along the bur
Plain Fissure Straight forms the cavity walls of the preparation. it is a straight tip with no cuts along the bur
Plain Fissure Cross-Cut forms the cavity walls of the preparation. there are cuts along the bur
Tapered Fissure Cross-Cut Forms divergent walls of the cavity preparation. it does have cuts along the bur
Second Number In BLACKS the length of the blade in millimeters
Chisel used to shape and plane enamel and dentin walls of the cavity preparation. the blade is straight and has a cutting edge
Excavator also known as "spoons" are used to remove carious material and debris from the teeth, removing excess cement, tucking rubber dam material and packing gingival retraction cord
Condenser/ Plugger used to pack amalgam in the cavity preparation
Periodontal Probes are used to measure the depth of the gingival sulcus. they can be single or double ended instruments and measure in millimeters
Plastic Filling Instruments are used to place and condense pliable restorative materials and place cement bases in the cavity preparation
Indirect Vision when the operator uses a mouth mirror to view areas of the oral cavity not seen with direct vision
Round Bur used first to open the cavity and remove carious tooth structure. they are round on the tip with no cuts
Wheel Bur form retention in preparations. shaped like a tiny pinwheel
Pear Bur opens and extends the cavity preparation. shaped like a tear drop
End Cutting Bur forms the shoulder or crown preparations. its straight with cuts on the tip of the bur
Step 1 of Maintaining Handpieces While still attached flush handpiece for 20 to 30 seconds
Step 2 of Maintaining Handpieces scrub and remove debris, rinse and dry
Step 3 of Maintaining Handpieces Lubricate if it is lube free then sterilize
Step 4 of maintaining Handpieces Sterilize as directed
Step 5 of maintaining Handpieces Lubricate if instructed
Low Speed Handpiece AKA straight handpiece because the head and shank are in a straight line, used in operatory to polish teeth and restorations, remove soft carious material and define cavity margins and walls and in the lab are used to adjust, finish and polish. no coolant
Electric Handpiece mostly used in dental offices, can be used for high and low speeds at a range of 27.000 to 200.000 RPM with various atachments
Head/ Working End where the bur is located on the handpiece
Coolant water the flows along the high speed handpiece so it does not overheat or kill the pulp of the tooth
High Speed Handpiece operates at 400.000 RPMs or higher and is a smooth one piece design with a contra- angle
Rubber Points used to polish and are especially adaptable when defining anatomy in restorations
Finishing Burs they smooth and finish metal restorations ad natural tooth colored materials. they can have up to 30 blades: RED 8 & 12 blades: YELLOW 16 & 20 blades: WHITE 30 blades
Diamond Burs used for rapid reduction of tooth structure during cavity preparation, polishing and finishing composite restorations and occlusal adjustment, and for bone and gingival contouring during surgical procedures
Inverted Cone Burs removes caries and makes undercuts in the preparation. gets larger toward the end of the tip
Cutting Burs 9 basic shapes include round, inverted cone, plain fissure straight, plain fissure crosscut, tapered fissure straight, tapered fissure crosscut, end cutting, wheel and pear. they have 6-8 blades or surfaces
Contra-Angle the head slightly angled to the shank of the handpiece
Abrasives non bladed instruments used to finish and polish restorations and appliance's. some are used for cutting
Straight Handpiece used with long shank rotary instruments such as burs, discs and stones with attachment heads such as contra- angle and right angle
Burnisher used to smooth rough margins of the restoration and to shape metal matrix bands. they come in different shapes such as BALL, T-BALL, ACORN and BEVERTAIL
Direct Vision when the operator can see the oral cavity without the use of a mouth mirror, usually the mandibular arch excluding the anterior surface facing the tongue
Reflection of Light illumination of an area being examined or treated
Explorers single or double ended, used to examine surfaces of the teeth to direct and irregularity. part of the Basic Dental Tray Setup and come in different shapes, PIG TAIL, SHEPARDS HOOK, RIGHT ANGLE and 17
Parts of a Dental Handpiece working end (head), Shank, Connection end
Working End (Head) where the bur, discs, stones and other rotary attachments are held and cutting and polishing are accomplished
Shank the handle portion of the handpiece
Connection End where the handpiece attaches to the power source and the forward and reverse switch is also located
Cutting Pieces angle formers, chisels, excavators, gingival margin trimmers (GMT) hatchets and hoes
Angle Formers used in a downward pushing motion to form and define point angles. double ended so it can be used on the right and left surfaces of the cavity preparation
Gingival Margin Trimmers (GMT) similar to the hatchet with 2 differences. 1st the blade is curved not flat and 2nd the cutting edge is at an angle, with double ends that curve right and left for distal and mesial surfaces
Dental Burs are rotary instruments that include discs and stones attached to the dental handpieces
Cavity Preparation preparation for restorations, the hollowing of a tooth for repairs
Created by: red112409