In January'15 I had my right hip resurfaced. My surgeon was personal friends with one of the developers of the Baguera cervical disc, and told me all about it. Because wear debris is a common and major complication with artificial hips, my hip surgeon was especially excited about the Baguera disc.
All articulating surfaces of the implant are covered with a 'diamond-like' coating, meaning that all wear debris is ... carbon. Since our physiology knows what to do with carbon, wear debris will never be a problem if you get one of these devices. The best I could tell from my hip surgeon, this disc was developed to solve that problem.
If you want to have a look at this device,
here is a brochure.