Table 1 Simulated apical lesions (SAL) stages at which the specimens were X-rayed (CBCT and DIR) and photographed (bur diameter ± 0.02 mm; * = this SAL-stage was prepared only for the purpose of defining the SAL location, thus, not evaluated).

From: Detectability of simulated apical lesions on mandibular premolars and molars between radiographic intraoral and cone-beam computed tomography images: an ex vivo study

SAL

Lesion

SAL size (mm Ø)/limits

1st

No lesion

–

*

Superficial cancellous bone

0.3

2nd

50% of the bur diameter in cancellous bone

0.7

3rd

100% of the bur diameter in cancellous bone

1.4

4th

Complete cancellous bone width

Cancellous cortical limit

5th

Cortical bone perforated

Visible perforation

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