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Questions and Answers
What is Class I calculus?
What is Class I calculus?
- Moderate to heavy subgingival calculus present throughout the mouth
- Heavy supragingival calculus throughout the mouth
- Light supra or subgingival calculus with isolated deposits (correct)
- Moderate supra calculus with detection on 14 teeth
What defines explorer detected calculus in Class II?
What defines explorer detected calculus in Class II?
Makes a 'click' sound as the explorer is passed over it.
Class III calculus involves only supragingival calculus.
Class III calculus involves only supragingival calculus.
False (B)
Which class of calculus indicates moderate to severe perio involvement?
Which class of calculus indicates moderate to severe perio involvement?
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Class II calculus is detected on at least _____ teeth, including lower anteriors.
Class II calculus is detected on at least _____ teeth, including lower anteriors.
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Study Notes
Classification of Calculus
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Class I:
- Light supragingival or subgingival calculus and/or stains on mandibular anterior teeth
- May include one or two additional isolated deposits
- Presence of more plaque than calculus
- Minimal to no soft debris
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Class II:
- Moderate supragingival calculus
- Subgingival calculus detectable by explorer on at least 14 teeth, including lower anterior teeth
- Explorer detects calculus that causes a "click" sound when passed over
-
Class III:
- Moderate to heavy supragingival calculus present
- Subgingival calculus detectable by explorer throughout the mouth
- Specifically affects mesials and distals of bicuspids and molars
- Calculus spur visibility on radiographs
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Class IV:
- Heavy supragingival and/or subgingival calculus present throughout the mouth
- May appear as a continuous band, with or without soft debris
- Associated with periodontal involvement, exhibiting moderate to deep pockets (5-7mm)
- Moderate to severe bone loss and tooth mobility likely
- Treatment typically occurs in sextants or through non-surgical periodontal therapy (NSPT)
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