The patient is a 22-year-old woman who has been affected by a Giant Cell tumor for 5 years and presented with difficulty walking and swelling in the pelvic region.

Pre-operative simulation and planning

Using the patient’s CT scan, the locations of the cuts on the patient’s bone in the pubis and ilium were identified.

Based on the patient’s contralateral side, the overall geometry of the prosthesis was obtained. The version and inclination angles of the cup were also applied according to the patient’s healthy side. Positions for 4.5 mm screws were designated at the connection of the prosthesis to the ilium, and 3.5 mm screws were placed at the connection of the prosthesis to the pubis. The prosthesis extended to the contralateral pubis. A porous structure was created at the prosthesis-bone interfaces to promote bone tissue formation.

The part was manufactured using a 3D printer and, after post-processing, cleaning, and sterilization with gamma radiation, it was provided to the physician.

Tumor images

During the surgery, the guide designed based on the patient’s anatomy was first placed on the ilium bone, and the incision was made according to the geometry of the prosthesis.

Images after surgery

The prosthesis was placed on the bone according to the planning, and as shown in the postoperative image, the fixation of the prosthesis was achieved through the designated screw holes.