[ANDREH]

Hi, I had a positive impression of him. He seems very confident, but since I don't know very much about the coligne screws (or with any other posteriordynamic systems) I have some doubts, like: how many year are they suppose to last, do they really get enough load to offset artrosys at the facet joints? Can they get loose with time? How is screw important is positioning during surgery? If anyone has any insight on those issues that would be great. Is there also any competitor rods for posteriordynamic systems that are used without fusion. Thanks