The present application relates to a coaptation plate comprising a core and an overmould, the core comprising at least one window which is designed to at least partially extend over a fracture which separates a first portion of the osseous tissue from a second, the window being positioned between two openings through which a fastening screw passes, wherein one of said openings lies at least partially within a proximal portion of the core and the other opening lies at least partially within a distal portion of the core, the overmould enclosing the core and forming at least one upper layer and one lower layer on either side of the core, the window defining polymer material links that pass through the core and connect the upper layer and the lower layer, thus ensuring that the overmould is anchored in the core.