| 摘要 |
An intervertebral spacer or implant (10) is disclosed which has a rapidly tapering presenting portion (12) and two opposed lateral surfaces (14 and 16). The presenting portion (12) can include a semicircular region having a radius (R1) when viewed from an elevation orientation, and comprises a second semicircular region having a radius (R2) when viewed from a plan orientation. The opposed lateral surfaces (14 and 16) each include posterior end (14A and 16A), respectively, and anterior end (14B and 16B), respectively. The opposed lateral surfaces (14 and 16) taper away from each other at an angle theta, preferably in the range of 5 degrees to 8 degrees.
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