module 13- tactile sensitivity
TRANSCRIPT
Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
Chapter 12
Explorers
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What Am I feeling?
Interpretation of Subgingival Conditions
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Calculus Deposits
• Supragingival deposits are located coronal to gingival margin.
• Subgingival deposits are hidden beneath gingival margin.
• Subgingival deposits are built up layer by layer slowly over time.
Copyright © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins
• The ability to recognize what you are feeling subgingivally is a skill that takes time and concentration to develop.
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Common Types of Calculus Formations
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Normal Conditions
• Your fingers do not feel any interruptions in the path of the explorer.
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Small Calculus Deposits - Spicules
• You will feel a gritty sensation as the explorer passes over the small calculus deposit.
• “Inline skating over a few pieces of gravel”
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Large Ledge of Calculus
• You will feel the tip move out and around the raised bump and return back to the tooth surface.
• “Skating over a speed bump in a parking lot”
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Overhanging Restoration
• Explorer must move away from tooth and over the restoration
• “Skating over a section of a sidewalk that is higher than the adjacent section”
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Deficient Margin on Restoration
• Explorer dips in to trace the restoration
• “Skating onto a section of pavement that is lower than the surrounding pavement”
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Carious Lesion
• Explorer tip dips in to a rough depression
• “Skating into a pot hole”
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Compressed Air for Calculus Detection
• Use compressed air for visual inspection.
• When dried, supragingival calculus appears rough and chalky.
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Recap
• Concentration is needed for a clinician to determine what he or she is feeling when the explorer tip vibrates as it encounters root surface irregularities.
• Technique errors such as incorrect grasp, incorrect tip adaptation, and lack of compressed air can lead to undetected calculus.