Flap elevation: the incision should be of what thickness?

• A. Thin
• B. Moderate
• C. Full
• D. Partial

Answer: (C)

In flap elevation, you raise a full-thickness mucoperiosteal flap. This means the incision includes mucosa, connective tissue, and periosteum, so the flap is reflected as a single unit. Including the periosteum preserves the flap’s blood supply and gives direct access to the underlying bone for debridement or osseous steps. A partial-thickness approach leaves the periosteum on the bone, which can compromise flap viability and make reflection and bone work more difficult. A thin or moderately thick incision won’t provide the necessary tissue to safely mobilize the flap. Therefore, full thickness is the appropriate choice.