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Radiology · single question

What does the 'SLOB' rule stand for in radiographic localization?

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

SLOB = 'Same Lingual, Opposite Buccal.' When the X-ray tube/cone is shifted and a second radiograph is taken, an object that appears to move in the SAME direction as the tube shift is positioned LINGUALLY, while an object that appears to move in the OPPOSITE direction is positioned BUCCALLY — this is the buccal object rule used to localize structures in three dimensions from two 2D films.

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