Orthopaedic implant systems including transfer features and methods for plan transfer
This disclosure relates to planning systems, assemblies and methods. The planning systems, assemblies and methods disclosed herein may be utilized for planning and implementing orthopaedic procedures to restore functionality to a joint, and may include one or more transfer members for positioning implants relative to patient anatomy.
1. A transfer guide for an orthopaedic procedure comprising:
a guide body including an interface configured to be coupled to an implant of a prosthesis, wherein the guide body includes a passage dimensioned to at least partially receive a guide pin insertable in bone;
one or more transfer members extending from the guide body, wherein the one or more transfer members are configured to contact tissue, wherein the one or more transfer members are dimensioned according to a patient-specific surface contour of a patient anatomy, wherein the one or more transfer members are moveable relative to the guide body, and wherein the one or more transfer members include a plurality of transfer members circumferentially distributed about a periphery of the guide body; and
an alignment member extending from the guide body and spaced apart from the interface, wherein the alignment member includes a protrusion adapted to limit relative rotation between the transfer guide and the implant in response to insertion of the protrusion into an aperture of the implant.
2. The transfer guide as recited in claim 1 , wherein the one or more transfer members are positioned relative to the guide body based on a predetermined surgical plan.
3. The transfer guide as recited in claim 1 , wherein each of the transfer members includes a first portion extending radially outward from the guide body and a second portion extending axially from the first portion, and the second portion is configured to contact tissue.
4. The transfer guide as recited in claim 3 , wherein each of the transfer members includes a third portion that extends from the first portion, the third portion is translatable along a respective slot established in the periphery of the guide body to set a position of the second portion relative to the guide body.
5. The transfer guide as recited in claim 3 , wherein the first portion and the second portion establish a substantially L-shaped geometry.
6. The transfer guide as recited in claim 1 , wherein:
the interface of the guide body includes a threaded protrusion adapted to mechanically attach the transfer guide to an implant; and
the passage extends through the threaded protrusion.
7. The transfer guide as recited in claim 1 , wherein:
the transfer members are moveable relative to the guide body in response to sliding the respective transfer member along the periphery of the guide body to vary an axial position of a contact surface of the transfer member relative to a longitudinal axis of the guide body, and the contact surface is dimensioned to contact tissue when the guide body is coupled to an implant.
8. The transfer guide as recited in claim 1 , wherein:
the alignment member includes a first portion and a second portion, the first portion is captured in a respective slot established in the periphery of the guide body, and the second portion extends radially outward from the guide body to interconnect the first portion and the protrusion.
9. The transfer guide as recited in claim 7 , wherein:
the transfer members are dimensioned with respect to one or more parameters of a surgical plan associated with a respective patient, the one or more parameters including contact points along the respective contact surfaces that contact the patient-specific contour of the patient anatomy as specified in the surgical plan.
10. The transfer guide as recited in claim 8 , wherein:
the first portion of the alignment member is slidably received in the respective slot of the guide body;
each of the transfer members includes a first portion slidably received in a respective slot of the guide body, a second portion extending radially outward from the guide body, and a third portion extending axially from the second portion, and the third portion is configured to contact tissue associated with the patient-specific surface contour of the patient anatomy;
a length of the protrusion is less than a respective length of the third portion of the transfer members, and a length of the second portion of the alignment member is less than a respective length of the second portion of the transfer members; and
a geometry of the protrusion differs from a geometry of the third portion of the transfer members.
11. An assembly for an orthopaedic procedure comprising:
an implant configured to abut bone; and a
transfer guide comprising:
a guide body including an interface configured to be coupled to the implant, wherein the guide body includes a passage dimensioned to at least partially receive a guide pin insertable in bone to set a position of the implant;
one or more transfer members extending from the guide body, wherein the one or more transfer members are configured to contact bone, wherein the one or more transfer members are dimensioned according to a patient-specific surface contour of a patient anatomy, wherein the one or more transfer members are moveable relative to the guide body, wherein the one or more transfer members include a plurality of transfer members circumferentially distributed about a periphery of the guide body; and
an alignment member extending from the guide body and spaced apart from the interface, and wherein the alignment member includes a protrusion adapted to limit relative rotation between the transfer guide and the implant in response to insertion of the protrusion into an aperture of the implant.
12. The assembly as recited in claim 11 , wherein the one or more transfer members are positioned relative to the guide body based on a predetermined surgical plan.
13. The assembly as recited in claim 11 , wherein the implant includes a baseplate and an augment extending from the baseplate relative to an axis, and the augment is dimensioned to contact bone.
14. The assembly as recited in claim 13 , wherein the one or more transfer members are dimensioned to be at least partially axially aligned with the augment relative to the axis.
15. The assembly as recited in claim 13 , wherein the augment includes an augment body extending between a first face and a second face, the first face extending along the baseplate, and the second face dimensioned to substantially follow a contour of the bone.
16. The assembly as recited in claim 13 , wherein the interface of the guide body includes first threads that mate with second threads along the baseplate to mechanically attach the transfer guide to the implant.
17. The assembly as recited in claim 13 , wherein:
the baseplate includes a central aperture and a plurality of peripheral apertures circumferentially distributed about the central aperture, each of the peripheral apertures dimensioned to receive a respective fastener to secure the implant to bone; and
the baseplate comprises the aperture.
18. The assembly as recited in claim 17 , wherein the passage is configured to be aligned with the central aperture in an installed position, and the passage is dimensioned to at least partially receive the guide pin insertable through the central aperture and into bone to set the position of the implant.
19. The assembly as recited in claim 11 , wherein the one or more transfer members are moveable between a first position and a second position.
20. The assembly as recited in claim 19 , wherein each of the one or more transfer members includes a first portion extending radially outward from the guide body and a second portion extending axially from the first portion, and the second portion is configured to abut tissue adjacent the implant.
21. The assembly as recited in claim 20 , wherein:
the implant includes a baseplate and an augment extending from the baseplate relative to an axis, and the augment is dimensioned to contact bone;
the baseplate includes a central aperture and a plurality of peripheral apertures circumferentially distributed about the central aperture, each of the peripheral apertures dimensioned to receive a respective fastener to secure the implant to bone;
the interface of the guide body is at least partially receivable in the central aperture to secure the transfer guide to the implant; and
the baseplate comprises the aperture.
22. The assembly as recited in claim 21 , wherein the interface includes first threads that mate with second threads along the central aperture to mechanically attach the transfer guide to the implant.