Device for surgical displacement of vertebrae

A device for surgical displacement of vertebrae, comprising:

• a sliding part with an internal thread;
• a carrier part, wherein the sliding part and the carrier part cooperate in a sliding way;
• and
• a driving element with an externally threaded portion, the driving element located between the sliding part and the carrier part;
• wherein the driving element includes a head having a diameter larger than a diameter of the externally threaded portion and a length shorter than a total length of the driving element;
• wherein the internal thread of the sliding part acts as a threaded guideline in a longitudinal axis of the device cooperating with the driving element to impart a movement of the sliding part relative to the carrier part along the longitudinal axis of the device;
• wherein the sliding part includes a seat having a diameter corresponding with the diameter of the head;
• wherein the seat has a length larger than the length of the head and shorter than the total length of the driving element;
• wherein the carrier part includes a cylindrical seat with a diameter and a length corresponding to the diameter and the length of the head;
• wherein the sliding part includes a first contact face that extends parallel to the longitudinal axis of the device, the carrier part includes a second contact face that extends parallel to the longitudinal axis of the device and contacts the first contact face, where the sliding takes place along the first and second contact faces;
• wherein the sliding part and the carrier part include cooperating elements, respectively:
• at least one first shaped element and at least one second shaped element;
• and
• wherein the cooperating elements extend parallel to the longitudinal axis of the device and prevent separation of the sliding part and the carrier part in a perpendicular direction to the longitudinal axis of the device.