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Flashcards in Restoration Materials & Instruments Deck (36):
0

Factors that affect the choice of restoration?

Cavity size
Cavity position
Tooth involvement
Extent of caries
Patient's wishes

1

What does good cavity prep consist of?

Removal of all caries
Removal of minimum amount of healthy tissue
Avoid accidental exposure of pulp
Protect pulp (linings)
Produce a retentive cavity for restoration

2

What is the purpose of a mouth mirror?

To aid vision
Reflect light onto tooth
Retract and protect soft tissues

3

Purpose of right angled probe?

Check aviary margins
Assess soft dentine with a cavity
Detect overhangs in restorations

4

Purpose of excavators?

Removes softened dentine
Small/large spooned shape

5

Purpose of an amalgam plugger?
(Packer)

Push and adapt filling material to suit cavity shape
Make sure that no air spaces are left

6

Purpose of a burnisher?

Press and adapt restoration to the cavity margins to prevent leakages

Ball/pear shaped

7

Purpose of enamel chisel?

Remove unsupported enamel from cavity edges
Item is becoming obsolete and is being replaced with the use of various burs

8

What are methods of moisture control?

High speed suction
Low speed suction
Cotton wool
Dry guards
Rubber dam
3in1 tip

9

Another name for fast handpiece?

Air Turbine

10

How many revolutions does a fast handpiece do per minute?

500,000

11

How many revolutions does a slow hand piece do per minute?

40,000

12

What does a round bur do?

Gains access to cavities and at a low speed for removing caries

13

What does a pear shaped but do?

Shapes and smooths cavities

14

What does a fissure but do?

Shapes and outlines cavities

15

Types of mandrels

Huey mandrel
Moore mandrel
Pinhead mandrel

16

What is the purpose of restorative materials?

Prevent pain/sensitivity
Restore function
Improve aesthetics

17

Types of temporary restorations

Zinc oxide and eugenol
Zinc phosphate
Zinc polycarboxylate

18

What is zinc oxide and eugenol used for?

Cavity liner
Temp dressing with soothing qualities
Temp cement

19

What is zinc phosphate used for?

(Thick) temp fill or base of permanent restoration
(Thin) luring cement: crown, inlay,ortho

20

What is zinc polycarboxylate used for?

Cement crowns,bridges,inlays & ortho
Cavity lining
Temp filling or deciduous teeth permanent

21

What is the purpose of a lining?

To protect pulp from thermal shock
Encourage secondary dentine

22

What is the chemical symbol for amalgam?

Hg

23

What is amalgam made up of?

Silver up to 74%
Copper up to 30%
Tim
Zinc

24

What are dentine pins used for?

Improves retention of restoration

25

What does a matrix system do?

Prevents overhangs
Holds filling

26

What are the two types of matrix systems?

Siqveland and tofflemire

27

What is a matrix system used for class V restorations?

Cervical

28

What is the instrument used for supra-gingival calculus?

Jaquette

29

What are wedges used for?

Placed inter dentally to help secure matrix system

30

What are the five finishing instruments?

Ward's carve
Flat plastic
Burnisher
Greenstone drills
Articulating paper

31

What are the three way mercury poisoning can occur?

Inhalation
Ingestion
Absorption

32

Which waste does amalgam go into?

Special containers
Hazardous waste - non infectious/chemical

33

What are the three types of composite?

Microfine composites - anterior teeth/polishes/glosses

Hybrid comp - posterior teeth/high strength/ better wear resistance

Universal comp - anterior & posterior/combo of both

34

How much phosphoric acid is in etch?

33%

35

What material would be used for class V restorations?

Glass ionomer