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Restorative & Materials · single question

What is the SLOB rule used for in dental radiography, and what does it stand for?

  1. Same Lingual, Opposite Buccal — used to localize objects using two periapical radiographs taken at different horizontal angulations
  2. Surface of Lingual, Occlusal, and Buccal — used for implant placement
  3. Superior Labial, Occlusal Buccal — used to identify caries
  4. Same Lateral, Opposing Buccal — used to detect root fractures
Show answer and explanation

Correct answer: A. Same Lingual, Opposite Buccal — used to localize objects using two periapical radiographs taken at different horizontal angulations

  • A. Correct. SLOB = Same Lingual, Opposite Buccal. When two periapical radiographs are taken with different horizontal angulations (Clark's technique), an object that moves in the SAME direction as the cone is located LINGUALLY; one that moves in the OPPOSITE direction is located BUCCALLY. Used to locate extra canals, foreign bodies, and supernumerary teeth.
  • B. This is an entirely incorrect definition of SLOB.
  • C. The full form and purpose are incorrect for this option.
  • D. The full form is incorrect — SLOB stands for Same Lingual, Opposite Buccal.

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