Fredrik Sporrong November 18, 2016

Dr. Ola Wiig, an experienced pediatric orthopaedic surgeon, was confronted with a very challenging deformity in a young teenager. Dr Wiig’s patient was suffering from severely reduced mobility as a result of an epiphysiolysis in her proximal femur, which caused her leg to be severely rotated outwards. This wasn’t just causing the patient pain, it was stopping her from being a normal teenager.

corrective osteotomy in the left femur

Dr. Wiig’s colleague, Dr. John Slåstad, orthopaedic surgeon at Oslo University Hospital Rikshospitalet has successfully treated several patients with severe bone loss using 3D-printed aMace custom implants from Materialise. Knowing this, Dr. Wiig contacted Materialise to investigate whether it was possible to use this technology to better understand and to secure full correction of this severe deformity in 3D.

Together with the surgeon, our clinical engineer worked to come up with a feasible treatment plan to create better leg function for the patient. The plan included a corrective osteotomy in the left femur. To execute it, a 3D-printed anatomical model and outcome model were provided, together with patient-specific guides to make sure the cut was made at exactly the right location and angle.

Thanks to the work that was put into this planning trajectory, the surgeon estimated that he performed the surgery in approximately half the time it would have taken without the 3D plan and patient-specific guides. A shorter time spent in surgery is always beneficial because of the reduced risk of complications caused by infection, bleeding etc.

corrective osteotomy in the femur

Dr Wiig was very happy to be able to see and understand the deformity by having an anatomical model at hand. It helped him to evaluate the correction he needed to achieve. After surgery, he commented that he would not have been able to perform an exact corrective osteotomy without the support of the Materialise team, the preplanning, the anatomical model and the surgical guides. He also pointed out that he was thrilled with both the precise fit of the 3D-printed guides on the patient’s femur, and with how well the custom plate fit on the patient’s femur after the correction was performed.

And the result for the patient? Just two days after the surgery, she had recovered enough to be able to take the train back to her hometown.

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