04 Endo Radiography

Question 1

Buccal Object Rule (SLOB)

Answer 1

‘clark’s rule’ or ‘cone shift technique’

• checking whether and object is b or L
• A lingual object will move in the same M/D direction as the cone head, and a buccal object will move in the opposite M/D direction
• Same Lingual, Opposite Buccal

Question 2

how much of the cortical plate and/or mineralized bone has to be destroyed before it appears on a radiograph?

Answer 2

12.5% of cortical plate and or 7.4% of mineralized bone