Which should be done if a sealant is found to be partially lost during a subsequent examination?
a. Attempt to remove the remaining portion of sealant with a bur and replace the entire sealant with new material.
b. Freshen the remaining portion of sealant adjacent to the lost portion, re-etch the enamel, and apply new sealant to replace the missing portion.
c. Prepare the tooth for a composite restoration.
d. Nothing. The sealant has penetrated the enamel rods and confers caries protection.