Patient specific instrumentation (PSI) for orthopedic surgery and systems and methods for using X-rays to produce same

  • US 10,716,579 B2
  • Filed: 03/08/2018
  • Issued: 07/21/2020
  • Est. Priority Date: 09/25/2013
  • Status: Active Grant
First Claim
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1. A patient specific system for knee replacement surgery, the patient specific system comprising:

  • a surgical guide adapted to be positioned on a bone;

    a digital bone model of the bone generated using at least two two-dimensional X-ray scans of the bone taken from different angular positions; and

    a patient specific instrument for positioning the surgical guide on the bone, the patient specific instrument formed based on the digital bone model, the patient specific instrument including;

    a body having fastener guide holes, the fastener guide holes adapted to receive fasteners therein used to fasten the surgical guide to the bone; and

    one or more anchor elements on the body adapted to abut one or more surfaces of the bone, the anchor elements being disposed in locations on the body of the patient specific instrument overlying a peripheral bone contour of the bone in at least one of the two-dimensional X-ray scans, said locations and the peripheral bone contour corresponding to areas of expected high accuracy on the digital bone model generated by the two-dimensional X-ray scans.

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