The Piezo "effect"describes a physical interaction, which is used in different fields of clinical medicine. An ultrasound technology results in the power of a surgical cut technique, which is able to distinguish between hard and soft tissue. With the presented instruments it is possible to treat bone mechanically in a piezo-surgical manner without hurting the surrounding soft tissues when touching them. Four examples: Tooth extraction before implantation under minimal grinding of bone, Gaining bone for peri-implant transplantation, Preparation of Sinus Lift, Exposing the inferior alveolar nerve demonstrate the use of Piezo-Surgery in the intraoral area. This method shows a remarkable addition to the intraoral operation techniques.