A convex spinal fusion interbody space device includes spaced apart superior and inferior abutment surfaces which are effectively medially convex. The peak of such convexity is displaced anteriorly of a central plane through the device. The spacer device has front to rear lateral concave surfaces and...http://www.google.de/patents/US6942698?utm_source=gb-gplus-sharePatent US6942698 - Spinal fusion interbody spacer
