Root lesions that are soft can be penetrated with an explorer and those that are dark brown are likely to be:

Question

Quizplus · Accepted Answer

Dark brown root lesions are indicative of caries with possible pulpal involvement. Soft lesions can easily be penetrated with an explorer, indicating that they are not hard, mineralized lesions. Incipient lesions are considered to be the earliest stage of a cavity and are not likely to be dark brown. Remineralized lesions are typically white, not dark brown.

Root Lesions That Are Soft Can Be Penetrated with an Explorer