Shoulder arthroplasty system
AssigneeZimmer Technology, Inc.
InventorsRoy C. Wiley, Brian C. Hodorek
Life of this patent
Estimating the term…
Abstract
An implant system for total shoulder arthroplasties, hemi shoulder arthroplasties, and “reverse” total shoulder arthroplasties including a humeral stem having an enlarged head portion with interfaces adapted to removably receive various modular interchangeable components, such as articulating liners, spacers, and adapter inserts. The humeral stem functions as a universal platform that may be used in either conventional or “reverse” total shoulder arthroplasties, as well as hemi shoulder arthroplasties, and may remain implanted in place during a revision in which the implant system is converted between the foregoing configurations, for example.
Claims19
A glenoid implant component for use in a total shoulder arthroplasty procedure, the procedure including preparing a planar surface of a glenoid of a patient, the component comprising:
- a substantially cup-shaped body having a planar medial side adapted to seat against the planar surface of the glenoid, and a stem extending from said planar medial side, said planar medial side extending radially outwardly from said stem to an outer periphery of said body;
- a tapered annular wall extending from a lateral side of said body, said tapered annular wall sized and shaped to lockingly interface with a tapered bore of a glenosphere;
- at least one hole in said body, wherein said at least one hole includes an at least partially spherical seat therein, and wherein said at least one hole includes a hole opening in said planar medial side;
- at least one screw extendable through said hole, said screw including a threaded shank and an at least partially spherical head, said head abuttable against said seat;
- and
- a screw retainer movable between a first position wherein said screw head may move polyaxially with respect to said seat and a second position wherein said screw head is retained in a fixed position with respect to said seat.
A glenoid implant component for use in a total shoulder arthroplasty, comprising:
- a base member, comprising:
- a substantially cup-shaped body having a base wall and a bore extending through said base wall for receiving a bone screw;
- a stem emanating from a planar medial surface of said base wall;
- and
- a tapered annular wall extending from a lateral side of said base wall, said tapered annular wall having an inner wall face defining a cavity, said bore disposed within said cavity and including an opening in the planar medial surface of said base wall;
- and
- an articulating component, comprising:
- a medial side including a tapered bore receivable onto said tapered annular wall of said base member;
- and
- a lateral side defining a substantially smooth, uninterrupted, convex articulating surface lacking an opening for receipt of a fastener.
A glenoid implant component for use in a total shoulder arthroplasty, the glenoid component comprising:
- a glenoid base including a bone engaging first surface and an opposing second surface, said glenoid base comprising:
- an annular wall extending outwardly from said second surface to define a cup-shaped body including a cavity;
- at least one hole extending from a planar section of said first surface to said second surface, said hole including an at least and a hole opening in said planar section of said first surface;
- and
- a stem emanating from the planar section of said first surface,
- said planar section extending radially outwardly from said stem to a periphery of said first surface, whereby said planar section is adapted to fit upon a substantially flat, planar resected surface of a glenoid;
- a glenosphere comprising:
- an articulating surface defining an uninterrupted convex surface;
- and
- a second engagement structure configured to engage said annular wall of said glenoid base;
- and
- a polyaxial screw for anchoring said glenoid base to a glenoid, said polyaxial screw at least partially disposed within said cavity defined by said annular wall, said polyaxial screw including an at least partially spherical head, said head configured to be retained on said partially spherical seat of said glenoid base.
A glenoid implant component for use in a total shoulder arthroplasty procedure, the procedure including preparing a planar surface of a glenoid of a patient, the component comprising:
- a body comprising:
- a planar medial side adapted to seat against the planar surface of the glenoid;
- a lateral side;
- a cup-shaped tapered wall extending from the lateral side of the body, said cup-shaped tapered wall configured to lockingly interface with a tapered bore of a glenosphere;
- a stem extending outwardly from said planar medial side;
- a porous biomaterial received on said planar medial side, said porous biomaterial adapted to promote bone ingrowth;
- and
- at least one hole in said body, wherein said at least one hole extends from said lateral side to said planar medial side and includes an at least partially spherical seat therein, and wherein said at least one hole is surrounded by said cup-shaped wall and includes a hole opening in said planar medial side;
- and
- at least one screw extendable through said hole, said screw including a threaded shank and an at least partially spherical head, said head abuttable against said seat such that said screw head may move polyaxially with respect to said seat.
Dependencies are inferred from the claim text.