Active bone screw

A method of inserting a bone screw into a bone by:

• threading a screw into a bone and forming a complimentary threaded socket in the bone;
• and
• expanding a thread of the screw into the threaded socket as the threaded socket expands with wear over time.

A method of maintaining a bone screw in a socket formed by the screw in a bone by expanding the thread of the screw into complimentary threads of the socket as the socket wears away over time.

A method of expanding a thread of a screw.

A method of inserting a bone screw into a bone by:

• Forming a socket in a bone and inserting a bone screw shank portion into the socket, while maintaining a radially expandable threaded portion of the screw shank portion in a compressed condition.

A method of inducing bone remodeling by applying a controlled force on a wall of a socket in a bone and creating a stress condition favorable for remodeling of the wall of the bone in the socket.

A method of gaining and maintaining better pull out strength of a bone screw from a socket in a bone by applying a controlled force on a wall of a socket in a bone and creating a stress condition favorable for remodeling of the wall of the bone in the socket.

A method of inducing intervertebral bone remodeling by applying a controlled force from an interbody fusion system against opposing vertebral surfaces.

44-47. (canceled)