Additive manufacturing via 3D printing has several variations (Fig 1). The most commonly available 3D printing technologies are stereolithography, SLS, fused deposition modeling, and multijet modeling. First, stereolithography (3D Systems; Formlabs) uses a laser to generate an ultraviolet beam at the surface of a pool of photosensitive resin, which leads to local polymerization of the liquid resin. The reaction platform is raised or dropped as each layer is created. This method offers high geometric accuracy but is limited by the resin material available for use (Fig 1A, Video 1). Second, SLS (3D Systems) uses a high-power laser (carbon dioxide) to fuse thermoplastic powder made from plastic, metal, or ceramic. After laser fusing a cross-section, the powder bed drops down one layer thickness, and a new layer of thermoplastic powder is applied. This method allows a variety of materials to be used and affords high accuracy and resolution but at a higher cost (Fig 1B). Third, fused deposition modeling (Stratasys) uses various filaments (acrylonitrile butadiene styrene, polylactic acid [PLA], polycarbonate, polyamides, polystyrene) that are forced through a heated extrusion nozzle, which melts the filaments on a platform bed. The printer nozzle moves in an x-y-z plane and deposits layer after layer of material that hardens after extrusion. This method provides high geometric accuracy and models that can be sterilized for use in an operative setting (Fig 1C, Video 2). Fourth, multijet modeling (Z Corporation) uses layers of fine powder (plaster or resin) that is bonded by water-based adhesive. This method allows full-color prototyping but at the sacrifice of geometric accuracy and mechanical strength (Fig 1D).