Restorative - Hand Cutting Instruments & Burs Flashcards
Bur/Instrument Order for Fillings
FINISH
Burs:
1. Straight Fissure Crosscut Bur
2. Round Bur - Latch Grip
3. Inverted Cone - Latch Grip
Hand Cutting:
6. Spoon Excavator
7. Angle Former
Straight Chisel
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
Enamel Hatchet
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
Gingival Margin Trimmer - Mesial
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
Gingival Margin Trimmer - Distal
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
Angle Former
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
Spoon Excavator
Function:To remove carious dentin
Characteristics
-Concave design, spoon-shaped with cutting edge
-Range of sizes
Inverted Cone - Latch Grip
Function: to establish retention in a tooth cavity prep
Characteristics:
-range of sizes
-short tapered looking
Round Bur - Latch Grip
Function: To remove caries from the tooth surface
Characteristics:
-Range of sizes
-Round in shape
Diamond Bur - Flat end taped friction grip
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
Fissure Tapered Crosscut - Friction Grip
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
Straight Fissure Crosscut - Friction Grip
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
Tapered Fissure Plain - Friction Grip
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
Laboratory Bur
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
