A modified compression appliance and associated hardware for use in spinal surgery

A detachable arm for detachable attachment to a compression tool used for positioning spinal vertebra to which are attached anchors on which is mounted a lockable primary rod movable relative to the anchors;

• the compression tool capable of inducing a compressive force to said anchors to enable said positioning of said vertebra;
• the compression tool having first and second detachable arms, one said detachable arm having a distal working end formation which in use, engages with and cooperates with the primary rod;
• he formation on the arm by co-operation with an anchorage associated with or on the primary rod enabling a concurrent rotation of the rod and translation of a vertebra to which the rod is connected via the vertebral anchors during compression applied to said anchors by the compression tool prior to locking of the rod by the vertebral anchors when vertebrae are in a selected position.

A detachable attachment for detachable attachment to a primary rod to which are attached vertebral anchors on which is mounted the primary rod;

• a compression tool used for positioning spinal vertebrae capable of inducing a compressive force to said vertebral anchors to enable said positioning of said vertebrae;
• the compression tool having first and second detachable arms, one said detachable arm having a distal working end formation which in use, engages with and cooperates with the detachable attachment to the primary rod;
• the formation on the arm by co-operation with the detachable attachment to the primary rod enabling a concurrent rotation of the rod and translation of a vertebra to which the vertebral anchors are during compression applied to said anchors by the compression tool prior to locking of the rod by the vertebral anchors when vertebrae are in a selected position.