Materials and Methods: Samples consist of (20) primary teeth affected by proximal caries. After taking radiographic images of the samples according to their radiographic groups, subsequent clinical caries excavation is done, and the resulting depth is measured using a Vernier caliper.

Results: The clinical study concluded superiority of x-ray film over CBCT imaging in detecting proximal carious lesion depth; whereas, both radiographic methods were effective in the diagnosis of proximal caries.

Conclusions: X-ray film radiograph is more successful and reliable than CBCT radiography in the clinical detection of proximal caries depth in deciduous teeth; we do not recommend the use of CBCT in children's in order to detect proximal caries only. The importance of using x-ray radiographs for proximal caries diagnosis.