PERIPROSTHETIC SHOULDER FRACTURE REPAIR
A periprosthetic fracture repair solution that provides a variety of fracture fixation options should a fracture occur after total hip, knee, or especially a total shoulder arthroplasty, and provides associated methods and apparatus for application of provided fixation. The ability to pre-engineer fracture fixation contingent solutions into humeral components provides for a distinct clinical advantage in the planning and execution for periprosthetic fracture fixation. Said methods and apparatus include targeting devices which allow for intimate association of fixed angle locking screws in pre-drilled holes in an existing prosthetic or other components including additional fixation components. Such apparatus and methods further include the use of alignment devices and other components to allow for ease of repair of periprosthetic fractures utilizing the pre-engineered solutions. Such targeting devices are required in specific circumstances as the prosthetics may prevent x-ray imaging and consequently free hand alignment.
1 . A prosthesis comprising:
a joint interface surface, configured to articulate against a second joint interface surface;
one or more contingent features integrally disposed on or within the prosthesis;
a removable contingent component interfaced with at least one of the contingent features; and
wherein the removable contingent component is further configured to:
provide access for insertion of a fracture stabilization component within a medullary canal of a shoulder bone in which the prosthesis is configured to reside; and
expose the one or more contingent features for use in securing the fracture stabilization component with the prosthesis.
2 . The prosthesis of claim 1 , wherein the removable contingent component is further configured to secure an aligning arm in mechanical registration with both the prosthesis and the fracture stabilization component.
3 . The prosthesis of claim 2 , wherein the aligning arm is further in mechanical registration with both the prosthesis and the fracture stabilization component, and configured for aligning one or more screws with holes in the prosthesis.
4 . The prosthesis of claim 2 , wherein the aligning arm is further in mechanical registration with both the prosthesis and the fracture stabilization component, and configured for aligning one or more screws with holes in both the fracture fixation component and the prosthesis.
5 . The prosthesis of claim 1 wherein the fracture stabilization component further comprises a humeral sheath.
6 . The prosthesis of claim 5 wherein the humeral sheath includes a vacated inner core.
7 . The prosthesis of claim 5 wherein the humeral sheath further interfaces to a fixation device that extends beyond a distal extent of a humeral fracture.
8 . The prosthesis of claim 1 , wherein at least one of the removable contingent components includes one or more interfaces of the prosthesis.
9 . The prosthesis of claim 1 , wherein the joint interface surface is notched or keyed for rotational alignment in situ.
10 . The prosthesis of claim 1 wherein the one or more contingent features include one or more of a pre-engineered notched interface, a pre-engineered threaded interface or a pre-engineered keyed interface.
11 . The prosthesis of claim 1 , wherein the one or more contingent features are further configured to be located adjacent to a terminal end and within an outer surface layer of a bone within which the prosthesis resides when in situ.
12 . A shoulder prosthesis comprising:
a joint interface surface, configured to articulate in situ against a second joint interface surface of a companion joint structure;
one or more contingent features integrally disposed on or within the prosthesis; and
one or more removable contingent components interfaced with at least one of the contingent features,
wherein at least one of the removable contingent components is configured to be removable in situ to expose at least one of the contingent features, so that the one or more contingent feature is further configured to both:
secure a fracture stabilization component with the prosthesis; and
secure an aligning arm in mechanical registration with both the prosthesis and the fracture stabilization component.
13 . The prosthesis of claim 12 , wherein the at least one removable contingent component is further configured to secure the aligning arm in mechanical registration with both the prosthesis and the fracture stabilization component, and to align one or more screws with holes in the fracture stabilization component.
14 . The prosthesis of claim 12 , wherein the aligning arm is in mechanical registration with both the prosthesis and the fracture stabilization component, and configured to align one or more screws with holes in the prosthesis.
15 . The prosthesis of claim 12 , wherein the aligning arm is in mechanical registration with both the prosthesis and the fracture stabilization component, and configured for further use to align one or more screws with holes in both the fracture stabilization component and the prosthesis.
16 . The prosthesis of claim 12 additionally comprising:
an extra-medullary fixation device comprising an aiming arm that interfaces with an intact humeral stem component.
17 . The prosthesis of claim 16 wherein the extra-medullary fixation device comprises a plate and aiming cannula.
18 . The prosthesis of claim 17 additionally comprising
a proximal locking cap covering the extra-medullary fixation device.
19 . The prosthesis of claim 12 , wherein at least one of the removable contingent components includes one or more interfaces of the prosthesis.
20 . The prosthesis of claim 12 , wherein the joint interface surface is notched or keyed for rotational alignment in situ.
21 . The prosthesis of claim 12 wherein the one or more contingent features include one or more of a pre-engineered notched interface, a pre-engineered threaded interface or a pre-engineered keyed interface.
22 . The prosthesis of claim 12 , wherein the one or more contingent features are further configured to be located adjacent to a terminal end and within an outer surface layer of a bone within which the prosthesis resides when in situ.