ADR post-op MRI image quality article- comments?

[fortitudine]

I found an article on a study done on post-operative imaging of cervical ADR: Magnetic Resonance Imaging Clarity of the Bryan,® Prodisc-C,® Prestige LP,® and PCM® Cervical Arthroplasty Devices

Posted 06/05/2007

Lali Sekhon H. S. MBBS, PhD, FRACS; Neil Duggal, MD, FRCS(C); James J. Lynch, MD, FRSC I; Regis W. Haid, MD; John G. Heller, MD; K Daniel Riew, MD; Kevin Seex, MBBS, FRACS, FRCS; Paul A. Anderson, MD

http://www.medscape.com/viewarticle/557709

Mark and others, what do the surgeons using the 'artifact-y' discs have to say about this? It worries me a bit as my problems are high up in the c-spine and if the level above can't be visualized post-op and starts to go I could be in big trouble.