[Custom-Made 3D Printed Titanium Acetabular Component: Advantages and Limits of Use]

Standard revision hip arthroplasty often fails in cases of severe acetabular bone loss. Prior research has shown that traditional implants struggle to integrate in such complex anatomical settings. No prior work had resolved the issue of pelvic discontinuity following implant failure. This gap motivated the exploration of custom-made implants. Custom implants may offer better anatomical fit in complex defects. However, the long-term integration of such implants remains uncertain. Bone allografts have been used to support implant stability. Yet, the combination of allografts with 3D printed titanium components is a novel approach.

This study aimed to evaluate the clinical outcomes of using a custom 3D printed titanium acetabular component in patients with advanced acetabular bone defects. The specific problem addressed was pelvic discontinuity following failed hip arthroplasty. The motivation stemmed from the limitations of conventional implants in such cases. The authors sought to determine if this technique could restore pelvic continuity. They also aimed to assess the role of impaction grafting in stabilizing the implant. The study focused on three patients with complex anatomical challenges. The goal was to evaluate both clinical satisfaction and radiographic outcomes. The findings may suggest a viable alternative to standard revision techniques.

The authors conducted a clinical case series involving three female patients with advanced acetabular bone defects. Each patient received a custom 3D printed titanium acetabular component. The implant was designed to bridge the defect and restore pelvic continuity. Impaction grafting was used to fill the base of the acetabular defect. The implant surface structure was analyzed for its effect on bone integration. Radiographic follow-ups were performed at 12 and 18 months post-surgery. Clinical outcomes were assessed using patient satisfaction and functional scores. The study compared the results to standard revision techniques in similar cases.

The custom 3D printed titanium component provided stable bridging of the acetabular defect. Radiographic imaging showed full integration of bone allografts at the implant base. Pelvic continuity was restored within 12 months after surgery. One patient underwent revision surgery at 18 months due to implant loosening. The other two patients remained satisfied with clinical outcomes at 5 and 6 years post-surgery. Despite radiographic signs of loosening, these patients refused further surgery. The implant’s surface structure hindered long-term osteointegration. However, the allografts facilitated future implantation of standard revision components.

The authors propose that the custom 3D printed titanium acetabular component is a viable alternative in complex acetabular reconstruction. The technique allowed for pelvic continuity restoration within a year. The impaction grafting supported implant stability despite surface limitations. Clinical outcomes were satisfactory in two of the three cases. The implant may serve as a bridge to future standard revision surgery. The findings suggest that this approach could be beneficial in similar cases. However, the lack of permanent osteointegration remains a limitation. The authors recommend further study to refine the implant surface for better integration.