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9 Cards in this Set
- Front
- Back
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Function of the universal retainer |
To hold the matrix band in position |
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Components of universal retainer |
1. Outer knob 2. Inner knob- controls the size of the loop 3. Spindle 4. Diagonal slot 5. Guide slots 6. Vise |
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Matrix bands acts as a missing wall |
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Types of matrix bands (need 4) |
- universal - premolar band - molar band - t band |
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Assembling a matrix band and universal retainer Equipment and supplies |
- basic set up - universal retainer - matrix band - ball burnisher - paper pad |
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Procedural steps in order |
Rinse and dry the preparation
Examine the outline of the cavity
Determine the size of matrix band
Prepare the band
Hold the retainer, and turn the outer knob
Turn the inner knob until the vise moves
Identify ends of the band together
Slide the joined ends of the band
Guide the band between the correct guide slots and place band |
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Wedges function |
To position a matrix band firmly against the gingival margin of the preparation which in turn helps the band provide the anatomic contour that is required interproximally. |
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Types of wedges |
Wooden Plastic |
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Band types |
Clear matrix- composite Metal- amalgam
Wedge is placed from lingual to buccal |
