Computer simulation, 3D-printing and custom-made prosthetics in treatment of a patient with osteosarcoma of the pelvis

The article presents a clinical case of treating a patient with iliac osteosarcoma who underwent pelvic resection with the replacement of the defect with an individual implant. Data of computed tomography (CT), a digital three-dimensional model of the pelvis reconstructed and a physical model made using 3D-printing. The optimal volume of bone resection was determined taking into account oncological principles. An implant design developed taking into account the anatomical features of the patient using computer simulation. A computer model of the pelvic bones with a defect replaced by an individual implant analyzed by the finite element method to determine the stress zones in the skeleton-implant system. The surgery was performed according to a previously plan, after the removal of the tumor, an individual pelvic prosthesis and hip prosthesis were successfully implanted. The patient followed up for 2 years, without the progression of the disease and the development of orthopedic complications with a good functional result. The use of computer design and 3D-printing of the pelvic prosthesis according to an individual project may be the optimal method of choice for the treatment of patients with tumors of the pelvic bones with a good clinical and functional result.

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