Patient specific knee alignment guide and associated method
First Claim
Patent Images
1. A method of preparing a joint for a prosthesis in a patient, the method comprising:
- mating a three-dimensional curved inner surface of a patient-specific alignment guide to a joint surface of the patient, the inner surface nestingly conforming and mateable only in one position on the joint surface of the patient;
positioning a drill guide having a body and first and second guiding bores in alignment with corresponding first and second guiding apertures of the alignment guide;
drilling first and second locating holes into the joint surface through the first and second guiding apertures;
inserting first and second guide elements through the first and second guiding apertures of the alignment guide into the first and second locating holes in the joint surface;
drilling third and fourth locating holes through corresponding third and fourth guiding apertures of the alignment guide;
removing the alignment guide without removing the first and second guide elements;
supporting a first cutting device on the first and second guide elements after the alignment guide is removed;
resecting the joint surface using the first cutting device after the alignment guide is removed;
supporting a second cutting device using third and fourth pins inserted into the third and fourth locating holes; and
resecting the joint surface using the second cutting device after the alignment guide is removed.
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Abstract
A method of preparing a joint for a prosthesis in a patient. The method includes obtaining scan data associated with the joint of the patient, preparing a three-dimensional image of the joint based on the scan data, preparing an interactive initial surgical plan based on the scan data, sending the surgical plan to a surgeon, receiving a finalized surgical plan from the surgeon, and preparing an image of a patient-specific alignment guide.
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Citations
15 Claims
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1. A method of preparing a joint for a prosthesis in a patient, the method comprising:
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mating a three-dimensional curved inner surface of a patient-specific alignment guide to a joint surface of the patient, the inner surface nestingly conforming and mateable only in one position on the joint surface of the patient; positioning a drill guide having a body and first and second guiding bores in alignment with corresponding first and second guiding apertures of the alignment guide; drilling first and second locating holes into the joint surface through the first and second guiding apertures; inserting first and second guide elements through the first and second guiding apertures of the alignment guide into the first and second locating holes in the joint surface; drilling third and fourth locating holes through corresponding third and fourth guiding apertures of the alignment guide; removing the alignment guide without removing the first and second guide elements; supporting a first cutting device on the first and second guide elements after the alignment guide is removed; resecting the joint surface using the first cutting device after the alignment guide is removed; supporting a second cutting device using third and fourth pins inserted into the third and fourth locating holes; and resecting the joint surface using the second cutting device after the alignment guide is removed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of preparing a knee joint for a prosthesis in a patient, the method comprising:
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mating a three-dimensional curved inner surface of a patient-specific femoral alignment guide onto a femoral joint surface of the patient, the inner surface configured to nestingly conform and mate only in one position to the femoral joint surface of the patient, the femoral alignment guide having first and second guiding apertures; positioning a drill guide having a body and first and second guiding bores in alignment with the first and second guiding apertures of the femoral alignment guide; drilling first and second locating holes into the femoral joint surface through the first and second guiding apertures; inserting first and second guide elements through the femoral alignment guide into the first and second locating holes; drilling a pair of distal locating holes through a pair of corresponding distal apertures of the femoral alignment guide; removing the femoral alignment guide without removing the first and second guide elements; supporting a distal cutting block on the first and second guide elements after removing the alignment guide; making a distal resection of the femoral joint surface using the distal cutting block; inserting corresponding pins of a femoral resection block in the distal locating holes after removing the alignment guide; and resecting the femoral joint surface with a blade passing through a cutting slot of the femoral resection block. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification