**Question:** After periodontal surgical procedure probing should be done after:

A. 24 hours
B. 72 hours
C. 10 days
D. One week

**Core Concept:** In periodontal surgery, probing is an essential procedure for assessing the health status of the periodontal tissues and detecting any possible complications or failures. Probing involves measuring the depth of the periodontal pocket to evaluate the attachment level and assess the presence of any inflammation or infection.

**Why the Correct Answer is Right:** The correct answer is D. One week because the initial stages of healing after periodontal surgery involve inflammation, pain, and increased bleeding, which can affect the accuracy of probing results. By the first week, most of these symptoms have subsided, and the healing process has progressed to a more stable phase. This allows for a more reliable assessment of the periodontal tissues and their healing status.

**Why Each Wrong Option is Incorrect:**

A. 24 hours: This is too soon after the surgery, and the inflammation and pain would interfere with accurate probing results.
B. 72 hours: While some healing may occur within the first 72 hours, the recovery process is still ongoing, which can lead to unreliable probing results.
C. 10 days: Ten days is too long, and the healing process might not be complete, leading to an inaccurate assessment of the periodontal tissues.

**Why the Correct Answer is Right:**

**Clinical Pearl:** In general, probing should be performed after the acute inflammatory phase has resolved, ensuring that the healing process has stabilized and is in a more predictable phase. This typically occurs around one week after the periodontal surgical procedure. By then, the patient should have recovered from the initial discomfort and the tissues are better equipped to offer an accurate assessment of the healing status.

**Why Each Wrong Option is Incorrect:**

A. 24 hours: The acute inflammatory phase begins immediately after the surgery and lasts for the first 24 hours. At this stage, probing is not reliable due to pain and inflammation.
B. 72 hours: The inflammatory response is not yet resolved after 72 hours. The healing process is ongoing, making probing unreliable.
C. 10 days: Ten days after the surgery, the healing process might still be incomplete, leading to an inaccurate assessment of the periodontal tissues.