Instruments and Equipment

Question 1

____ are used for removal and shaping of tooth structure; Essential aspects of restorative dentistry; Includes: Hand instruments◦Rotary instruments(handpieces)

Answer 1

Tools

Question 2

Excavators and chisels are examples of ____ instruments

Answer 2

Cutting instruments

Question 3

Amalgam condensers, mirrors, explorers, and probes are examples of _____ instruments

Answer 3

Non-cutting instruments

Question 4

_____ of an instrument is the outermost area of the working part of non-cutting instrument

Answer 4

Face

Question 5

_____ of an instrument is the outermost area of the working part of cutting instrument

Answer 5

Cutting edge

Question 6

The working part of non-working instrument is called

Answer 6

Nib

Question 7

The working part of working instrument is called

Answer 7

Blade

Question 8

____ is the neck of the instrument that is often curved

Answer 8

Shank

Question 9

_____ of instrument is angled to allow the cutting edge of the blade to be within the projected axis of the handle; allows force on blade without rotation

Answer 9

Shank

Question 10

Chisels and ordinary hatchets are ____ bevels

Answer 10

Bi-bevels

Question 11

Gingival margin trimmers are ____ bevels

Answer 11

Single bevels

Question 12

To place bevels on the mesial cervical margin of the preparation

Answer 12

Mesial marginal trimmer

Question 13

To place bevels on the distal cervical margin of the preparation

Answer 13

Distal marginal trimmer

Question 14

The ___ number on the handle of an instrument denotes Width of blade in tenths of mm

Answer 14

First

Question 15

The ___ number on the handle of an instrument When necessary, describes angle of CUTTING EDGE to instrument shaft in clockwise centigrade

Answer 15

Second

Question 16

The ___ number on the handle of an instrument denotes Length of Blade in millimeters

Answer 16

Third

Question 17

The ___ number on the handle of an instrument denotes Angle of blade relative to the long axis of the handle in clockwise centigrade

Answer 17

Fourth

Question 18

_____ is measured from a line parallel to the long axis of the instrument handle in clockwise centrigrades. The angle is expressed as a percent of 360 degrees; not always present

Answer 18

Cutting edge angle◦

Question 19

What instruments place retention and sharpen line angles?

Answer 19

Ordinary Hatchets

Question 20

What instruments remove caries?

Answer 20

Spoon excavators

Question 21

___ are straight, slightly curved (Weldelstaedt), or bin-angle; plane walls of prep

Answer 21

Chisels

Question 22

____ cut enamel

Answer 22

Enamel hatchets

Question 23

____ bevel enamel at gingival

Answer 23

Gingival margin trimmers

Question 24

Amalgam condensers, composite and plastic instruments are ____ instruments

Answer 24

Condensing instruments

Question 25

_____ applies to all rotary cutting instruments that have bladed cutting heads◦Prepare enamel◦Adjust resin restorations◦Finish metal and resin restorations◦Laboratory Work◦Surgical Removal of Bone

Answer 25

bur

Question 26

33 1/2, 34, 37, and 39 are ____ burs

Answer 26

Inverted cones

Question 27

330-333 are ____ burs

Answer 27

Pear-shaped burs

Question 28

56, 57, 557 are ____ burs

Answer 28

Straight fissure

Question 29

169. 170, and 171 are ____ burs

Answer 29

Tapered fissure

Question 30

____ burs are stiffer and stronger and steel; more brittle

Answer 30

Carbide burs

Question 31

____ burs have Higher hardness; Cutting effectiveness; Used for Intracoronal and extracoronal tooth preparations, Bevel enamel margins, and Enameloplasty

Answer 31

Diamond burs

Question 32

Can the electric handpiece be used for high and slow speed?

Answer 32

Yes

Question 33

_____ handpiece utilizes air-water spray for cooling, high operating speed (450,000 rpms for pneumatic and 200,000 rpms for electric), carbide or diamond burs; se light pressure

Answer 33

High-speed handpiece

Question 34

____ precautions include using light pressure, air water sprays and sharp burs

Answer 34

Pulpal Precautions

Question 35

____ precautions include using rubber dam, retract soft tissue with mirror and cotton roll

Answer 35

Soft tissue precautions

Question 36

___ grasp Palm away from operator, 3rd and 4th fingers rest on nearby tooth, Greatest sense of touch

Answer 36

Modified pen grasp

Question 37

____ grasp: Palm toward operator, Used mostly for tooth preparation from lingual, Usually on anterior teeth

Answer 37

Inverted pen grasp

Question 38

____ grasp: Similar to holding a knife while pairing an apple◦Power grasp◦Thumb rests on a nearby tooth to operating site

Answer 38

Palm-and-thumb grasp

Question 39

____ grasp: Power plus delicacy◦Rest thumb on same tooth that is being prepared or the adjacent tooth

Answer 39

Modified Palm-and-Thumb Grasp

Question 40

A process by which all forms of microbial life including bacteria, viruses, spores and fungi are completely destroyed

Answer 40

Sterilization

Question 41

____ Uses steam under pressure◦250 °F, 15 PSI, 20 mins*◦Shelves for cassettes

Answer 41

Autoclaving

Question 42

Oven-type sterilizer◦320 °F, 60 to 120 mins*

Answer 42

Dry heat

Question 43

Chemical vapor pressure◦Uses chemical solution in a pressurized chamber ◦270 °F, 20 to 40 PSI, 20 mins*◦Proper ventilation must be installed

Answer 43

Chemiclaving

Question 44

Several hours, below 100°C *◦Proper ventilation must be installed

Answer 44

Ethylene Oxide