A plurality of pins attach to bone, such as a vertebra (not shown). Spacers interpose between pins. A cable extends through pins and spacers between a cap and an expansion sleeve. The expansion sleeve increases cable tension to restrict movement among pins and spacers. ...http://www.google.de/patents/US20060195090?utm_source=gb-gplus-sharePatent US20060195090 - Apparatus for and method of aligning a spine
