Restorative - Hand Cutting Instruments & Burs

Question 1

Bur/Instrument Order for Fillings

FINISH

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:
6. Spoon Excavator - remove carious dentin
7. 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