Implant for osteosynthesis device, notable for the spine, and associated device for application the same

摘要

This implant comprises a part (2) intended for the bone anchoring, and a body (3) for fastening onto a rod (4), the body comprising two lateral branches (5) delimiting a channel (6) which is open on either side of the body in order to receive the rod, and a threaded plug (8) which is adapted in order to be screwed between the branches; between the plug and the rod, a plate (14) is fastened to a collar (15), with which it forms a block (16). The plate (14) is curved and has a concave surface (14a) which is adapted in order to be applied onto the surface of the rod. The curvature of the plate (14) allows the rod (4) to be blocked with a relatively small clamping pressure, by distributing forces, which improves the resistance of the rod to alternate flexion in the body (3), as well as improving the fatigue strength.