Prosthesis guide comprising patient-matched features
Systems, devices and methods for guiding placement, orientation, and fixation of an orthopedic implant. Examples include a surgical guide having a first surface structured to fit within a prosthetic cup, at least one guide hole through the first surface, and an alignment structure having a contour formed from data indicative of the patient anatomy. The contour of the alignment surface is complementary to a portion of the patient anatomy in a unique orientation that aligns the guide hole with tissue suitable for receiving a fastener. The alignment structure preferably includes an arm with a first end coupled to a rim of the guide and a second end coupled to the contour. In certain implementations, the guide includes a plurality of alignment structures. Further disclosed are methods of making and using a surgical guide for aligning an orthopedic implant.
1. A surgical guide for aligning a prosthetic cup, comprising:
a first surface structured to fit within a prosthetic cup, the first surface having at least one keying structure;
at least one guide hole extending through the first surface; and
an alignment structure having a patient-matched surface defining a contour formed from data indicative of the patient anatomy, wherein the contour is complementary to a portion of the patient anatomy in a predetermined orientation that aligns the guide hole with tissue suitable for receiving a fastener.
2. The guide of claim 1 , wherein the guide has a rim along the first surface, and wherein the alignment structure is coupled to the rim.
3. The guide of claim 2 , wherein the alignment structure has an arm with a first end coupled to the rim of the guide and a second end coupled to the contour.
4. The guide of claim 3 , further comprising a plurality of alignment structures.
5. The guide of claim 1 , wherein the at least one keying structure comprises at least one protrusion on the rim.
6. The guide of claim 1 , wherein the at least one keying structure comprises a taper portion of the first surface.
7. The guide of claim 1 , wherein the at least one keying structure comprises a protrusion on the first surface structured to fit within a hole of a prosthetic cup.
8. The guide of claim 1 , wherein the rim is substantially elliptical.
9. The guide of claim 1 , wherein the at least one guide hole comprises a plurality of guide holes.
10. The guide of claim 1 , wherein the first surface is substantially hemispherical.
11. The guide of claim 10 , wherein the guide has a central aperture located in an apical region of the first surface.
12. The guide of claim 1 , wherein the guide hole is configured to align with a fastener hole in the prosthetic cup to create a common through hole.
13. The guide of claim 12 , further comprising a fastener extending through the common through hole and alignable with an identified suitable location on the patient anatomy.
14. The guide of claim 13 , wherein the identified suitable location on the patient anatomy for alignment with the fastener is determined by the data indicative of the patient anatomy.
15. The guide of claim 12 , wherein the alignment structure is configured to extend beyond an outer surface of the prosthetic cup to interface with the patient anatomy in such a manner that the common through hole aligns with an identified suitable location on the patient anatomy when the guide is positioned in the predetermined orientation.
16. The guide of claim 1 , further comprising a plurality of the at least one guide hole extending through the first surface, and wherein each guide hole is aligned with an identified suitable location for placement of a corresponding fastener.
17. The guide of claim 1 , wherein the alignment structure comprises a plurality of patient-matched surfaces defining the contour.
18. The guide of claim 1 , wherein the surgical guide is configured to be coupled to the prosthetic cup prior to implanting the prosthetic cup.
19. The guide of claim 1 , wherein the prosthetic cup comprises an acetabular cup.
20. A surgical guide for aligning a prosthetic cup, comprising:
a first surface structured to fit within a prosthetic cup, the first surface having at least one keying structure;
at least one guide hole extending through the first surface and aligned with a fastener hole in the prosthetic cup to create a common through hole;
a fastener extending through the common through hole and alignable with an identified suitable location on the patient anatomy; and
an alignment structure having a patient-matched surface defining a contour formed from data indicative of the patient anatomy, wherein the contour is complementary to a portion of the patient anatomy in a predetermined orientation that aligns the guide hole with tissue suitable for receiving the fastener.
21. The guide of claim 20 , wherein the identified suitable location on the patient anatomy for alignment with the fastener is determined by the data indicative of the patient anatomy.
22. The guide of claim 20 , wherein the alignment structure is configured to extend beyond an outer surface of the prosthetic cup to interface with the patient anatomy in such a manner that the common through hole aligns with an identified suitable location on the patient anatomy when the guide is positioned in the predetermined orientation.
23. The guide of claim 20 , wherein the alignment structure comprises a plurality of patient-matched surfaces defining the contour.