What will happen to the #23 explorer when used on carious lesions?

When using the #23 explorer on carious lesions, it is designed to detect soft, demineralized areas of tooth structure. As the explorer is moved across these lesions, it is expected to "stick" to the softer, carious tissue, indicating the presence of decay. This sticking sensation occurs due to the loss of normal tooth structure in the carious area, which contrasts with healthy enamel or dentin that would allow the explorer to glide smoothly.

The stickiness provides important clinical feedback for the dentist, as it helps in assessing the extent of the carious lesion and guides treatment decisions. This tactile response is crucial for effective diagnosis and management of dental caries.