| 摘要 |
<p>An anterior cervical plate (22) is disclosed, along with threaded fasteners (24a-24d) for securing the plate to vertebrae (18, 20) or other osseous material. The cervical plate (22) has several pockets or apertures (30a-30d), preferably at least four, to receive a corresponding number of the fasteners (24a-24d). The pockets have spherical surfaces (34), and the fasteners have heads with similarly sized spherical surfaces (48), which when engaged permit each of the fasteners to be oriented at a variety of projection angles with respect to the plate (22). In connection with each pocket (30a-30d), the cervical plate (22) incorporates a fastener retaining feature (40). The feature can take the form of a cantilevered tab or a beam supported at its opposite ends, in each case plastically deformable between an open position for admitting the fastener and a closed position for preventing retraction.</p> |
