Bone plate for performing e.g. cervical arthrodesis, has holes, each with one end having covering unit to house, in cooperation with countersunk hole, part of drilled head of fixation screw to immobilize head in axial direction of screw

摘要

The plate has holes for the passage of a fixation screw (3). Each of the holes has an oblong shape and is drilled in its circumference. Each hole has an end (21) conformed for coupling a drilled head (30) of the screw in the end, and an end (22) with a covering unit (23) extending to the right of a countersunk hole (20). The unit (23) allows to house, in cooperation with the countersunk hole, a part of the head to immobilize the head in an axial direction of the screw after axial translational movement of the plate to pass the head from the end (21) to the end (22).