Pedicle mucoperiosteal flaps have how many releasing incisions?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Releasing incisions are what allow a flap that remains attached at the base to move freely enough to be advanced and expose the root surfaces. For a pedicle mucoperiosteal flap, you need two releasing incisions—one at each end of the flap—to release it from the surrounding tissue and periosteum so it can slide apically without tearing or losing its blood supply. A single releasing incision wouldn’t free the flap adequately on the opposite side, limiting mobility, while adding more incisions isn’t necessary for this design and could compromise tissue integrity.