Minimal dentinal destruction to get evident on the radiograph:
Correct Answer: 40 microns
Description: Minimal dentinal destruction of 40 microns is required to be seen on a radiograph.
Lesions confined to the enamel may not be evident until approximately 30% to 40% demineralization has occurred. For this reason, the actual depth of penetration of a carious lesion is often deeper than seen in the image.
Reference: White and Pharoah's Oral Radiology Principles and Interpretation 7th edition page no 288
Category:
Radiology
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