Introduction: Revision hip arthroplasty is a challenging surgical procedure, especially in
cases of advanced acetabular bone loss. Accurate preoperative planning can prevent complications
such as periprosthetic fractures or aseptic loosening. To date, the accuracy of three-dimensional
(3D) versus two-dimensional (2D) templating has been evaluated only in primary hip and knee
arthroplasty. Methods: We retrospectively investigated the accuracy of 3D personalized planning
of reinforcement cages (Burch Schneider) in 27 patients who underwent revision hip arthroplasty.
Personalized 3D modeling and positioning of the reinforcement cages were performed using computed tomography (CT) of the pelvis of each patient and 3D templates of the implant. To evaluate
accuracy, the sizes of the reinforcement cages planned in 2D and 3D were compared with the sizes of
the finally implanted cages. Factors that may potentially influence planning accuracy such as gender
and body mass index (BMI) were analyzed. Results: There was a significant difference (p = 0.003)
in the accuracy of correct size prediction between personalized 3D templating and 2D templating.
Personalized 3D templating predicted the exact size of the reinforcement cage in 96.3% of the patients,
while the exact size was predicted in only 55.6% by 2D templating. Regarding gender and BMI,
no statistically significant differences in planning accuracy either for 2D or 3D templating were
observed. Conclusion: Personalized 3D planning of revision hip arthroplasty using Burch Schneider
reinforcement cages leads to greater accuracy in the prediction of the required size of implants than
conventional 2D templating