iCAT 2026 PLENARY SPEAKERS

We have also invited certain notable guests to share their expertise in the field of 3D printing and its future applications.

Matic Kolar

University Medical Centre, Division of Orthopaedic Surgery, Ljubljana

The role of 3D-printed models in preoperative planning of complex total hip arthroplasty

Total hip arthroplasty (THA), renowned for its excellent clinical outcomes and significant impact on patients' function and quality of life, has been celebrated in orthopaedic surgery as the “operation of the century.” Modern, well-executed THA achieves approximately 90–95% survivorship at 10 years, with outcomes improving by nearly 5% over the past decade due to advances in surgical technique, implant design, and biomaterials. However, every implant remains susceptible to biological and mechanical failure, and eventual revision is an inherent risk. Revision hip arthroplasty, particularly in cases of severe acetabular bone loss, presents a considerable technical challenge. Complex three-dimensional (3D) defect morphology, distortion of anatomical landmarks, and compromised bone stock require precise restoration of hip biomechanics and secure implant fixation.

Conventional two-dimensional (2D) templating, based on plain radiographs, is limited by projection errors, magnification variability, and its inability to fully capture the spatial complexity of large acetabular defects. In this context, preoperative planning with 3D-printed models has emerged as a valuable adjunct in complex primary and revision THAs. CT-derived physical models allow tactile appreciation of defect geometry and enable simulation of component positioning and screw trajectories, thereby enhancing spatial understanding beyond 2D templating alone. These models facilitate more reliable implant sizing, improve planning of potential augments and reduce intraoperative uncertainty. Collectively, this approach typically results in a more predictable surgical course, shorter operative time, and a reduced risk for both early and late complications.

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