There are many flap designs recommended for the removal of impacted third molars. Western Surgical and Sedation’s STOW will discuss four different flap designs: envelope, triangle, modified triangle, and “S” flap. The most commonly recommended flaps are the envelope and triangle. No flap is perfect for all situations.
The “S” flap is used when preserving gingival attachment is a priority. This full-thickness flap extends in a mesial direction below the gingival attachment. It can be used in the maxilla and mandible. One suture distal to the second molar is usually sufficient for closure.