I am having pain on my right and left side which was explained to be the facet joint and when I lay strait it feels like its locking up I feel numbness in my legs due to compression or thining of discs. Maybe I should slow down and re think this. Although the neuro surgeons I have chose are award winning and tell me I will be fine . Can you tell me why they will not use coflex-f ? That seems more stabilizing. Thanks.