Instrumentation

Question 1

What are the two types of tooth cutting instruments

Answer 1

-Hand and rotary instruments

Question 2

What are hand instruments used for

Answer 2

to cut, plan, and cleave tooth structure

Question 3

How many series are there in the UBSDM internal system

Answer 3

3 (A,B,C series)

Question 4

A series instruments are used to..

Answer 4

cut and shape tooth structure and includes hatchets, hoes, chisels, and spoon excavators (caries removal)

Question 5

B series instruments are used to

Answer 5

place restorative materials (i.e amalgam condensors and plastic instruments)

Question 6

C series instruments are used to…

Answer 6

shape and finish restorative materials (i.e holdback covers, cleoid discoids, and other carvers)

Question 7

Blacks classification systems for instruments is based on…

Answer 7

size and configuration of instrument

Question 8

What is the primary cutting edge of an instrument

Answer 8

primary working surface of the instrument

Question 9

The primary cutting edge can be either __ or __ beveled

Answer 9

mono or bi

Question 10

What is the shank

Answer 10

connects the blade to the handle

Question 11

Can a blonde have a secondary cutting edge

Answer 11

yes

Question 12

How many numbers (digits) are there is Blacks instrument classification system

Answer 12

3

Question 13

What does each digit in the Blacks Classification system mean

Answer 13

• 1st digit= Width of blade in 10th of a millimeter
• 2nd digit= Length of blade in mm
• 3rd digit=Angle of the long axis of blade with handle in degrees centigrade

Question 14

If the first digits in Blacks classification system is 15 what does this means

Answer 14

the width of the blade is 1.5 mm

Question 15

90 degrees is how many degrees centigrade

Answer 15

25

Question 16

270 degrees is how many degrees centigrade

Answer 16

75

Question 17

0 degrees is how many degrees centigrade

Answer 17

0

Question 18

Blacks classification system also has a 4 number formula, what digits in this new classification system are the same as the 3 digits system

Answer 18

the 1st remains the same

Question 19

What digit in the 3 digit Blacks classification system comes the 3rd digit in the 4 digit system

Answer 19

2nd digit

Question 20

The 2nd digit in the Blacks classification system with 4 digits represent

Answer 20

2nd= Angle of the cutting edge of the blade with the handle in degrees centigrade

Question 21

The 4th digit represents

Answer 21

angle of long axis of blade with handle in degrees centigrade (Same as the 2nd digit in the 3 digits system)

Question 22

Is the drill the same as the bur

Answer 22

no

Question 23

A bur is __ cutting verses a drill which is __ cutting

Answer 23

side… end

Question 24

Multibladded rotary instruments are more effective at __ cutting verses __ cutting

Answer 24

die… end

Question 25

A bur is a __ instrument

Answer 25

multibladded rotary instrument

Question 26

(T/F) burs cut in one direction only

Answer 26

t

Question 27

How are burs classified

Answer 27

shape and diameter of the cutting edge of the bur

Question 28

What are the two parts of the bur

Answer 28

head and shaft

Question 29

How is the head of the bur classified

Answer 29

shape and diameter

Question 30

What is the function of the shaft of the bur

Answer 30

adapts the head to the handpiece

Question 31

Straight fissure bur is (single/multipurpose)

Answer 31

multipurpose

Question 32

What is the straight fissure bur numbered

Answer 32

55.5-60

Question 33

The straight fissure bur is a __ sided bur

Answer 33

parallel

Question 34

Cross cut bur is similar to...

Answer 34

straight fissure bur

Question 35

What are the differences between a cross cut bur and a straight fissure bur is that the cross cut burs have __ on the blades

Answer 35

notches (or flutes)

Question 36

Cross cut straight burs are numbered

Answer 36

556-560

Question 37

How are cross cut straight burs not as necessary today

Answer 37

because there are flutes on the blades which are not as necessary because of high speed handpeices

Question 38

What is the numbering for an inverted cone bur

Answer 38

33.5-40

Question 39

What is an inverted cone bur used for?

Answer 39

Develops retentive features, smooth walls and sharpen angle of cavity prep

Question 40

In inverted cone burs the side of the bur (Diverge/converge/are parallel) towards the shank

Answer 40

converge

Question 41

The tapered fissure bur is numbered

Answer 41

168-171

Question 42

A tapered fissure bur is used for

Answer 42

initial stages of cavity preparation and tapered wall forms

Question 43

Describe the shape of the tapered fissure bur

Answer 43

Sides of the bur converge towards the end of the bur

Question 44

What is the number for a round bur

Answer 44

1/16 - 11

Question 45

Purpose of the round bur is to

Answer 45

develop retentive features and remove caries

Question 46

There are notes on this reading in my notebook

Answer 46

ok