Surgical clips (910), which are particularly useful in the transoral invagination and fundoplication of the stomach to the esophagus, are disclosed. The clips include first and second arms (912 & 914) joined by a bridge to form a substantially U-shape, and which are provided with a first structure (931/932) adapted to prevent a movement of the clip in a direction perpendicular to a longitudinal axis of the clip after the clip is applied to tissue. In addition, the clips preferably also include a second structure (922/924) adapted to prevent rotation of the clip about the longitudinal axis of the clip after the clip is applied to tissue.
