What is the proper position for the flap margin during closure in periodontal surgery?

The proper position for the flap margin during closure in periodontal surgery is at the alveolar crest. This positioning is critical for several reasons. First, placing the flap margin at the alveolar crest helps to ensure that the soft tissue is connected appropriately to the bony structure, which promotes proper healing and reattachment of the periodontal structures.

This positioning also minimizes the risk of creating tension on the flap, which can lead to compromised blood supply and healing. When the flap is closed at the alveolar crest, it helps to align the soft tissues more naturally with the underlying bone, thus facilitating a more effective periodontal healing response.

In contrast, placing the flap margin above the marginal tissue might create a pocket that retains plaque and bacteria, leading to possible complications. Positioning below the incision line or at the base of the pocket would not provide adequate access and support for the periodontal tissues, potentially jeopardizing the success of the surgical intervention. Therefore, closing the flap at the alveolar crest is the most effective approach in periodontal surgery.