Jeff, that's quite a perspective. Naturally, this may evoke some differences of opinion, everyone has their own ideas about the best "kinematics" and design. I like many of your points:
- simplicity; less is more in terms of parts and number of materials;
- keel designs are injurious to the bone; perhaps more problematic for cervical ADR. Cleated endplate designs enable less injury and are easier to revise, should a revision be needed;
- you forgot the Charite', which was first implanted 26 years ago and has been implanted in thousands of patients.
Of course, there are many other designs too. Thanks for the thoughtful, analytical assessment.
D'Ann, what's your latest?