 This is a multiple site, prospective, non-randomized single arm observational study. It has been designed to document the treatment of serial rib fractures with MatrixRIB implants in a registry. A flail chest is an injury in which three or more consecutive ribs are broken. This injury causes a segment of the chest wall to become unstable und prevents effective respiration. Non-operative management requires long-term mechanical ventilation and is associated with a mortality rate of 17-47. Surgical stabilization of the rib fractures has shown to decrease this mortality by 38 - 72. Surgical stabilization is typically performed with generic plates that require extensive bending during surgery to conform the plate to the rib in a difficult and time-consuming procedure. 