An implant assembly for securing an implant comprising: an implant (300, 602) for a human rib, the implant comprising: an elongate body comprising: a first portion including a flat outer face, the elongate body curved along a plane perpendicular to the flat outer face; and a second portion extending from the first portion to form a curved outer face; a plurality of bores (310A-310N) extending through the flat outer face of the first portion and into the second portion; and a placement tool interface (306, 606) extending into the body; a placement tool (400, 500, 604) comprising: a handle (420, 520); a first arm (422A, 522A, 622A) extending from the handle (420, 520); a second arm (422B, 522B, 622B) extending from the handle (420, 520) and a retaining pin (424A, 524A, 624A) extending from a distal portion of the first arm, the retaining pin engageable with the placement tool interface to form a pivotable engagement therewith such that the implant (300,602) can rotate entirely between the first and second arms; and a fastener comprising: a proximal threaded portion securable to the rib; and a distal threaded portion extending distally from the proximal threaded portion, the distal threaded portion threadably securable to the implant bore (310A-310N). an elongate body comprising: a first portion including a flat outer face, the elongate body curved along a plane perpendicular to the flat outer face; and a second portion extending from the first portion to form a curved outer face; a first portion including a flat outer face, the elongate body curved along a plane perpendicular to the flat outer face; and a second portion extending from the first portion to form a curved outer face; a plurality of bores (310A-310N) extending through the flat outer face of the first portion and into the second portion; and a placement tool interface (306, 606) extending into the body; a placement tool (400, 500, 604) comprising: a handle (420, 520); a first arm (422A, 522A, 622A) extending from the handle (420, 520); a second arm (422B, 522B, 622B) extending from the handle (420, 520) and a retaining pin (424A, 524A, 624A) extending from a distal portion of the first arm, the retaining pin engageable with the placement tool interface to form a pivotable engagement therewith such that the implant (300,602) can rotate entirely between the first and second arms; and a handle (420, 520); a first arm (422A, 522A, 622A) extending from the handle (420, 520); a second arm (422B, 522B, 622B) extending from the handle (420, 520) and a retaining pin (424A, 524A, 624A) extending from a distal portion of the first arm, the retaining pin engageable with the placement tool interface to form a pivotable engagement therewith such that the implant (300,602) can rotate entirely between the first and second arms; and a fastener comprising: a proximal threaded portion securable to the rib; and a distal threaded portion extending distally from the proximal threaded portion, the distal threaded portion threadably securable to the implant bore (310A-310N). a proximal threaded portion securable to the rib; and a distal threaded portion extending distally from the proximal threaded portion, the distal threaded portion threadably securable to the implant bore (310A-310N).