The invention relates to an intervertebral implant comprising a spacer designed to be applied between two spinous processes of two vertebrae. According to one embodiment, an incoming frame is received. Consequently, a thermal separation is achieved in the filling wedge between the feed channels and the wedge surfaces, which makes it possible to work with high operating temperatures for the capsule shell material. The locking mechanism for locking the retractable punch shaft from linear movement and rotational movement relative to the guide is positioned at an opposite second end.