Restorative - Hand Cutting Instruments & Burs

Question 1

Bur/Instrument Order for Fillings

Answer 1

Burs:
1. Straight Fissure Crosscut Bur - used to open up tooth for cavity prep
2. Round Bur - Latch Grip - help remove decay & open up, complete prep
3. Inverted Cone - Latch Grip - to create retention

Hand Cutting:
4. Spoon Excavator - remove carious dentin
5. Angle Former - accentuate line & point angles in internal
6. Mesial Margin Trimmer / Distal Margin Trimmer - create bevels on cervical third

Question 2

Straight Chisel

Answer 2

Function: To plane and cleave enamel in an anterior cavity preparation

Characteristics:
Used with a push motion
Single-Bevel cutting edge
Single or Double ended

Question 3

Enamel Hatchet

Answer 3

Function:
-To cut, clean, and smooth walls in a cavity preparation
-To remove enamel not supported by dentin

Characteristics:
-Used with push motion
-Cutting edge on same plane as handle
-Single or double ended

Question 4

Gingival Margin Trimmer - Mesial

Answer 4

Function: To create bevels on the mesial cervical margin of a cavity preparation

Characteristics:
-Curved blade - cutting edge at angle to blade
-Double ended - one end curves to the right; the other to the left

Question 5

Gingival Margin Trimmer - Distal

Answer 5

Function: To create bevels on the distal cervical margin of a cavity preparation

Characteristics:
-Curved blade - cutting edge at angle to blade
-Double ended - one end curves to the right; the other to the left

Question 6

Angle Former

Answer 6

Function: To accentuate line and point angles in internal outline and retention in a cavity preparation

-Cutting edge at an angle
-Single or Double ended

Question 7

Spoon Excavator

Answer 7

Function:To remove carious dentin

Characteristics
-Concave design, spoon-shaped with cutting edge
-Range of sizes

Question 8

Inverted Cone - Latch Grip

Answer 8

Function: to establish retention in a tooth cavity prep

Characteristics:
-range of sizes
-short tapered looking

Question 9

Round Bur - Latch Grip

Answer 9

Function: To remove caries from the tooth surface

Characteristics:
-Range of sizes
-Round in shape

Question 10

Diamond Bur - Flat end taped friction grip

Answer 10

Function: commonly used during a crown prepartion due to it’s reduction speed

Characteristics:
-Range of grits (usually color coded)
-Variety of shapes and sizes

Question 11

Fissure Tapered Crosscut - Friction Grip

Answer 11

Function:
-To cut cavity preparations
-To form angles in walls of cavity preparations
-To create retention grooves in walls of cavity preparation

Characteristics:
-Has tapered sides with horizontal cutting edges
-Range of sizes

Question 12

Straight Fissure Crosscut - Friction Grip

Answer 12

Function:
-To cut cavity preparations
-To form walls of a cavity preparatoin
-To create retention grooves in walls of cavity preparation

Characteristics:
-Has parallel sides with horizontal cutting edges
-Range of sizes

Question 13

Tapered Fissure Plain - Friction Grip

Answer 13

Function:
-To cut the cavity preparations
-To form angles in walls of a cavity preparations
-To place retention grooves in the walls of the cavity preparation

Characteristics:
-Cutting part of bur has tapered sides
-Range of sizes

Question 14

Laboratory Bur

Answer 14

Function:
-To cut models or trim acrylic extra orally or in the dental laboratory

Characterisitcs:
-Long shank - for attachment to straight handpiece
-Variety of sizes and shapes

Question 15

What instrument is used to bevel the mesial cervical walls in a cavity preparation?

Answer 15

Gingival Margin Trimmer Mesial

Question 16

Which instrument is used with a push motion to cut, clean and smooth the walls in a cavity preparation?

Answer 16

Enamel Hatchet

Question 17

The instruments whose function is to clean and smooth the floor and walls in a cavity prep? It is used with a pulling motion.

Answer 17

Enamel Hoe

Question 18

Which instrument is used to create bevels on the distal cervical margin of the preparation?

Answer 18

Distal gingival margin Trimmer

Question 19

What instrument is used to remove carious dentin in a cavity preparation?

Answer 19

Spoon Excavator

Question 20

Which instrument is used with a push motion to plane and cleave enamel in a cavity preparation and has a curved blade on the working end?

Answer 20

Wedelstaedt chisel

Question 21

What bur adds retention to the walls of the cavity preparation and also has a ‘flat’ top??

Answer 21

Inverted cone

Question 22

The bur that cuts into and forms the inner walls of the cavity preparation is the:

Answer 22

Fissue bur (straight, tapered, or crosscut)

Question 23

What instrument is used to accentuate line and point angles in a cavity preparation?

Answer 23

Angle former

Question 24

Which bur removes caries, and can open the tooth for endodontic treatment?

Answer 24

Round bur