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13 Cards in this Set
- Front
- Back
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Which are more efficient single or double ended instruments?
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Double-less stopping and picking up--just flip
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Paired vs. Unpaired instruments
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Unpaired-different working ends
Paired-working ends mirror images of eachother |
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How are instruments named?
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By school or person who designed them
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What is the function of the design number?
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IDs working ends
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What does it mean if you say an instrument is balanced?
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working ends are centered with the midline of the handle
-ensures that finger pressure applied against the handle is transferred to the working-end for calc removal -An instrument that isn't balanced is hard to use and stresses the muscles of the hand |
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Why do posterior teeth need a complex shank?
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Have large, bulky crowns that are larger in diameter than the roots
Anteriors are wedge-shaped so a simple shank is adequate to reach along the crown onto the root |
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Functional shank vs. Lower (terminal) shank
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Functional shank-begins below working end and extend to last bend in the shank nearest the handle
Lower shank-part of the lower shank that is nearest the working end |
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What are instruments with an extended lower shank good for?
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Can read the middle and apical third of the root surface
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Toe vs. Tip
Give examples of instruments that use either one |
Different instruments have different shaped working ends
Curet-rounded toe Sickle-pointed tip |
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What will the cross section of an instrument tell you?
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Whether is can be used subgingival or supragingival
Triangles (sickle scalers)-supra ging olnly Semicircles (curets) supra OR sub |
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Which instruments are classified as assessment and which are calculus removal?
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Assessment: Prove and Explorers
Calc Removal: Sickle Scalers, Curets, Periodontal files |
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What shape are explorers in a cross section?
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circular
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What is a perio file used for?
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Crush large calc deposits
Each working end has several cutting edges |
