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Journal of Experimental Orthopaedics
Fig. 3 | Journal of Experimental Orthopaedics

Fig. 3

From: Impacted bone allograft personalised by a novel 3D printed customization kit produces high surgical accuracy in medial opening wedge high tibial osteotomy: a pilot study

Fig. 3

Intraoperative preparation of structural impacted bone allograft with the customized 3D printed kit. (A) The femoral head is placed on the platform and fixed with two 1.8 mm Kirschner pins through the cutting block, without full engagement to the bottom. (B) The anterior and posterior borders of the graft are cut perpendicular to the platform. (C) The medial contour of the graft is trimmed, which identically matches the curvature of the medial cortex of the patient. Correct graft positioning can hereby later controlled. (D) The desired result after graft shape contouring with an oscillating saw. (E) Next, the designated cast is pushed to the graft, again matching the prepared medial curvature of the graft. (F) The upper surface of the cast is used as guiding plane to obtain (G) the desired bone wedge. (H) Finally, the intended structural bone allograft can safely be removed from the guide and is ready for introduction in the osteotomy gap

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