Systems, devices and methods are provided for assisting in spinal stabilization. A buttress plate system is provided that can include an intervertebral spacer (5), a buttress plate (10), a spinal screw (105), and an insertion instrument (200). The buttress plate (10) is configured to extend across at least a part of an intervertebral space to block or prevent an intervertebral spacer (5) from backing out of the intervertebral space when the buttress plate (10) is secured to the spine. The buttress plate (10) includes a curved plate body (20) having an aperture (25) therethrough for receiving a spinal screw (105). The buttress plate (10) also includes a pair of engagement members (54) in the form of spikes to help stabilize the buttress plate (10) relative to the spine prior to securing the buttress plate (10) to the spine. The buttress plate (10) can be coupled to an insertion instrument (200) that is used to guide the buttress plate (10) to a desired position adjacent the spine. Once in a desired position, a spinal screw (105) can be delivered through the insertion instrument (200) and through the aperture (25) of the buttress plate (10) to secure the buttress plate (10) to the spine. The insertion instrument (200) thus helps to properly position the buttress plate (10) adjacent the spine and to deliver a spinal screw (105) toward the aperture (25) of the buttress plate (10).Cette invention concerne des systèmes, des dispositifs et des méthodes favorisant la stabilisation du rachis. Le système de plaque de soutien ci-décrit peut comprendre un espaceur intervertébral (5), une plaque de soutien (10), une vis à rachis (105), et un instrument dinsertion (200). La plaque de soutien (10) est conçue pour sétendre sur au moins une partie dun espace intervertébral de façon à bloquer ou à empêcher un espaceur intervertébral (5) de saillir hors de lespace intervertébral quand la plaque de soutien (10) est fixée au rachis. Elle est constituée dun corps de plaque incurvé (20) c
