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Radiology · single question

What does the 'SLOB' rule stand for in dental radiography?

  1. Surface of Lingual, Occlusal, and Buccal
  2. Same Lateral, Opposing Buccal
  3. Same Lingual, Occlusal and Buccal
  4. Same Lingual, Opposite Buccal
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Correct answer: D. Same Lingual, Opposite Buccal

  • A. Incorrect interpretation.
  • B. Incorrect interpretation.
  • C. Incorrect acronym interpretation.
  • D. SLOB = Same Lingual, Opposite Buccal. This rule (Clark's rule) is used to determine the BUCCOLINGUAL position of objects (roots, canals, foreign bodies) on periapical radiographs by taking two exposures with the tube shifted horizontally. An object that moves in the SAME direction as the tube shift is LINGUAL; an object that moves in the OPPOSITE direction is BUCCAL.

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