Enamel cutting instruments

2

Enamel cutting instruments

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image Instrument

Parts of an instrument

1 Handle image

Grasping end of instrument
Variety of sizes and styles
Handle styles (see Chapter 1, Instrument Handles, p. 9)

2 Shank image

Connects handle to working end of instrument
May be straight or may have one or more angles to accommodate specific areas of the mouth

3 Working end image

May have cutting edge, blade, bevel, point, nib, or beaks
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image Instrument

Three-number instrument*

Function image

Numbers on handle indicate width, length, and angle of blade
1. Indicates width of blade in tenths of millimeters

Example:

 ​20 indicates a width of 2 mm

2. Indicates length of blade in millimeters

Example:

 ​8 indicates a length of 8 mm

3. Indicates angle of blade from long axis of shaft

Example:

 ​12 indicates an angle of 12 degrees

The designation for the instrument described above is 20-8-12; the number of instrument size is indicated on the handle.

Examples of three-numbered instruments:

 ​Enamel Hatchet, Enamel Hoe, Wedelstaedt

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Four-number instrument*

Function image

Numbers on handle indicate width of blade, angle of cutting edge, length of blade, and angle of blade
1. Indicates width of blade in tenths of millimeters

Example:

 ​20 indicates a width of 2 mm

2. Indicates angle of cutting edge of blade in relation to handle

Example:

 ​95 indicates a cutting edge angle of 95 degrees

3. Indicates length of blade in millimeters

Example:

 ​8 indicates a length of 8 mm

4. Indicates angle of blade from long axis of shaft

Example:

 ​12 indicates a blade angle of 12 degrees

The designation for the instrument described above is 20-95-8-12; the number of instrument size is indicated on the handle.

Examples of four-numbered instruments:

 ​Angle Former, Gingival Margin Trimmers—Mesial and Distal

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Enamel hatchet

Functions image

To clean and smooth walls in cavity preparation
To remove enamel not supported by dentin

Characteristics image

Used with push motion
Cutting edge on same plane as handle
Single or double ended
Is a three-numbered instrument

Examples of instrument numbers:

20-9-14
15-8-14
15-8-12

Practice note image

Enamel Hatchet is used on restorative tray setups.

 

imageEnamel Hatchet must be cleaned, bagged individually or bagged/wrapped in a tray setup, and then sterilized. A chemical/steam indicator device should be included in the wrapping.

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Feb 3, 2015 | Posted by in Dental Hygiene | Comments Off on Enamel cutting instruments
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