What is the CAL if the probing depth is 3mm and the recession is 4mm?

To determine the Clinical Attachment Level (CAL), you add the probing depth to the recession. In this scenario, the probing depth is 3mm, and the recession is 4mm. Therefore, the CAL is calculated as follows:

CAL = Probing Depth + Recession

CAL = 3mm + 4mm

CAL = 7mm

This result indicates that the depth at which the periodontal tissue is attached is 7mm from the cementoenamel junction, which is crucial for understanding the health of the periodontium. Knowing the CAL helps in diagnosing periodontal diseases and assessing the severity of attachment loss.

While the other options present different values, only the option representing 7mm accurately reflects the correct computation based on the parameters given in the question.