Customized implants

The clinical unmet need addressed by customized 3D printed titanium acetabular implants was the poor outcome resulting from the use of conventionally manufactured triflange implants, jumbo cup, cages and augments to reconstruct massive acetabular defects [14–18]. These defects most commonly occur following previous failed implants. Conventionally manufactured implants failed due to poor fixation to the bone as a result of the complex shape of the defect and low surface area of host bone with good blood supply. 3D printed implants have overcome both of these problems (Figure 1a).

**Figure 1.** Images showing backside and internal surface of (**a**) custom and (**b**) off-the-shelf 3D printed implants. Post-operative X-ray images are also shown.
