vertebral intercorporeal unit of spacer and coupled plate

摘要

Spinal Intercorporeal Spacer and Coupled Plate Unit is an implant to be inserted into a disc space between two vertebrae, where the implant includes a spacer (20), a plate (50) coupled to the spacer, various bone fixation elements (70) to engage the vertebrae and a retention mechanism to prevent bone fixation elements from retreating from the plate after surgery. the retention mechanism may be in the form of spring-driven locking elements (110) forced to communicate with the bone locking elements so that, after the bone locking elements have advanced beyond the locking elements, they are forced to return to the initial position, making contact with the bone fixation elements. alternatively, the retention mechanism may be in the form of a helix (31 °) rotating between a first position where the bone fasteners may be inserted and a second position where the bone fasteners are hindered. to back off.