Went in for a tlif with screws and rods, but after performing the interbody fusion, the doc decided to use the above mentioned clamp instead of the rods and screws. The jury for me is still out as the surgery was by no means minimally invasive. There really isn't much info available om the Aspen, but at least I haven't located any hate stories about it. Today is my one month anniversary so I'm still dealing with the immediate post surgical recovery. Has anyone else had an Aspen clamp done?