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Patient with Paprosky IIIa defect and acetabular component loosening (a). Planning is performed using a digital three-dimensional model (b). Custom-made porous titanium alloy acetabular component printed using direct metal laser sintering (c). Intraoperative use of patient-specific instrumentation placed Schanz screws as positional references for implant (d) and reamer (e) placement. Postoperative computed tomography scan confirming satisfactory positioning (f)
