hand instruments

Question 1

how did GV Black order instruments?

Answer 1

according to ORDER names, SUBORDER names, CLASS names, and SUBCLASS names.

Question 2

order names

Answer 2

denote the purpose for which the instrument is to be used

Question 3

suborder names

Answer 3

define the manner or position of use of the instrument.

Question 4

class names

Answer 4

describe the working point of the instrument, such as spoon excavator.

Question 5

subclass names

Answer 5

indicate the angle of the shank.

Question 6

instrument formula

Answer 6

devised by Dr G V Black
allows instruments to be readily duplicated anywhere

e.g. gingival margin trimmer is 15-95-8-12R

Question 7

first 2 digits of the instrument formula

Answer 7

the width of the blade in tenths of a millimetre

Question 8

third and fourth digits of the instrument formula

Answer 8

length in millimetres

Question 9

fifth digit digits of the instrument formula

Answer 9

the angle which the blade forms with axis of the handle

expressed in hundredth of a circle (100 gradations or centigrades)`

Question 10

sixth and seventh digits of the instrument formula

Answer 10

cutting edge angle to the length of the blade

express in centigrades

Question 11

handle letter digits of the instrument formula

Answer 11

one of pair made in rights and lefts in order to work more effectively

Question 12

4 parts of hand instruments

Answer 12

• handle
• shank
• blade and cutting edge
  or
• nib and point

Question 13

handle

Answer 13

longest part of hand instrument where it is held

Question 14

shank

Answer 14

joins the handle to the blade or nib

Question 15

blade and cutting edge

Answer 15

in cutting instruments

Question 16

nib and point

Answer 16

in non-cutting instruments

Question 17

double ended instruments

Answer 17

each end mirrors the other end in shape

Question 18

3 uses of mirrors

Answer 18

• viewing intra-orally
• soft tissue retraction
• protection

Question 19

5 uses of probes

Answer 19

• Caries detection
• Point focus
• Surface testing
• Manipulation of objects
• Retraction

Question 20

use of tweezers

Answer 20

• handling small objects

Question 21

3 uses of excavators

Answer 21

• caries excavation
• material removal
• shaping and contouring restoratives

Question 22

2 uses of chisels

Answer 22

• finishing cavo-surface margin angles and enamel surfaces

- removal of unsupported enamel prisms

Question 23

2 uses of gingival margin trimmers/hatchets

Answer 23

• finishing cavo-surface margin angles and enamel surfaces

- removal of unsupported enamel prisms

Question 24

use of plastics

Answer 24

manipulation fo shapeable filling materials

Question 25

use of condensers

Answer 25

condensing amalgam

Question 26

2 uses of carves

Answer 26

• carving amalgam

- shaping composite

Question 27

use of burnishers

Answer 27

finishing amalgam restorations/ manipulating composite

Question 28

use of spatula

Answer 28

mixing materials (except resin/filler based cements) and resotratives

Question 29

use of applicators

Answer 29

placing lining materials

Question 30

2 matrices

Answer 30

kerr hawe supermat

kerr adapt supercap

Question 31

2 uses of matrices

Answer 31

• replacing cavity walls

- assisting in moisture control

Question 32

use of amalgam carriers

Answer 32

carrying amalgam from Dappen pot to cavity

Question 33

use of composite gun

Answer 33

composite placement