Table 1.

Qualitative questions regarding CBCT image cuts

No.	Question	Possible answers
Q1	The visibility of the top of the alveolar crest is	Very good/good/poor/very poor
Q2	The visibility of the buccal and palatal cortical plates is	Very good/good/poor/very poor
Q3	The estimated bone density at the implant site is:	D1/D2/D3/D4
Q4	For the purpose of implant placement, the quality of the image appears to you as	Very sufficient/sufficient/insufficient/very insufficient
Q5*	The visibility of the mandibular canal is	Very good/good/poor/very poor
Q6*	Do you need to use the sagittal or panoramic slices/cuts to identify the mandibular canal?	Yes/no
Q7*	Have you tried to move forward and back in panoramic slices/cuts to locate the mandibular canal?	Yes/no

* Questions 5, 6 and 7 were answered only for images of the posterior mandible