Patient-specific fracture fixation instrumentation and method
First Claim
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1. A method for internal bone fracture fixation comprising:
- engaging an inner three-dimensional surface of a bone holder with an outer surface of a first bone fragment of a fractured bone of a patient, the inner surface designed preoperatively to match the first bone fragment of the fractured bone based on a medical scan of the patient;
carrying the first bone fragment in the bone holder attached to a reduction instrument;
moving the first bone fragment with the reduction instrument to engage a fractured surface of the fractured bone using a shaft connected to the bone holder;
passing a pin through a hole of the bone holder into the fractured bone;
removing the bone holder;
attaching a patient-specific bone-engagement surface of an implant to an outer surface of a first bone portion of the fractured bone and the first bone fragment; and
fixing the first bone fragment to the fractured bone.
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Abstract
An instrument for internal bone fracture fixation includes a shaft having a distal portion and a patient-specific bone holder coupled to the distal portion. The bone holder has a three-dimensional curved and patient-specific bone engagement surface designed during a preoperative plan based on a medical scan of a patient to match and conform to an outer surface of a bone fragment of the patient in only one position.
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Citations
21 Claims
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1. A method for internal bone fracture fixation comprising:
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engaging an inner three-dimensional surface of a bone holder with an outer surface of a first bone fragment of a fractured bone of a patient, the inner surface designed preoperatively to match the first bone fragment of the fractured bone based on a medical scan of the patient; carrying the first bone fragment in the bone holder attached to a reduction instrument; moving the first bone fragment with the reduction instrument to engage a fractured surface of the fractured bone using a shaft connected to the bone holder; passing a pin through a hole of the bone holder into the fractured bone; removing the bone holder; attaching a patient-specific bone-engagement surface of an implant to an outer surface of a first bone portion of the fractured bone and the first bone fragment; and fixing the first bone fragment to the fractured bone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of designing a patient-specific fracture fixation device, the method comprising:
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producing a reconstructed bone by positioning a bone component onto a fracture surface of a fractured bone where a bone fragment has been separated from a remaining portion of the fractured bone, the bone component comprising a prosthetic implant comprising; an inner surface configured to mate with the fracture surface; and an outer surface defining an anatomic extension of the remaining portion of the fractured bone comprising a three-dimensionally contoured surface configured to match an outer surface portion of the bone fragment; obtaining images of the reconstructed bone, the images including three-dimensional curved surfaces of the bone component and the remaining portion of the fractured bone; and modeling a patient-specific bone holder for the fracture fixation device, the modeled bone holder including an engagement surface configured to match as an inverse surface to the outer surface of the bone component. - View Dependent Claims (12, 13, 14)
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15. A method for internal bone fracture fixation comprising:
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obtaining bone images of a fractured bone and a bone fragment; obtaining a patient-specific bone holder having a patient-specific surface comprising a mirror image of an outer surface of the bone fragment derived from the bone images of the bone fragment; attaching the patient-specific bone holder to a reduction instrument; carrying the bone fragment in the patient-specific bone holder attached to the reduction instrument; moving the bone fragment with the reduction instrument to engage a fractured surface of the fractured bone; holding the bone fragment against the fractured surface using the patient-specific bone holder and the reduction instrument; and attaching the bone fragment to the fractured bone. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification