Tibial insert with resistance-actuated post
AssigneeSmith & Nephew, Inc.
InventorJason S. Jordan
Life of this patent
Estimating the term…
Abstract
Trial joint inserts may have posts that slide along a base, compressing or extending a resistance member, such as a spring, as the post slides. During joint replacement surgery, a surgeon can test resistance members with different amounts of resistance using a trial insert, identify a suitable resistance for the resistance member, and then select a permanent insert with a resistance member having the desired resistance. The systems, devices, and methods of this application allow a surgeon to provide an individualized joint replacement for a patient.
Claims24
1-43. (canceled)
A tibial insert comprising:
- a base;
- a resistance-actuated posterior stabilizing post coupled to the base and configured to move relative to the base;
- a resistance member that interfaces with the post thereby modulating the movement of the post relative to the base;
- and
- an adjustment member that adjusts the resistance of the resistance member.
An insert for use in an orthopedic implant, the insert comprising:
- a base;
- a resistance-actuated stabilizing post coupled to the base and configured to move relative to the base, wherein the stabilizing post minimizes subluxation of the implant;
- and
- a resistance member that interfaces with the post, thereby modulating the movement of the post relative to the base.
A kit for fitting a tibial insert, the kit comprising:
- a plurality of tibial inserts, each comprising:
- a base;
- a resistance-actuated posterior stabilizing post coupled to the base and configured to move relative to the base;
- and
- a resistance member that interfaces with the post and the base;
- wherein each respective resistance member in the plurality of inserts has a different amount of resistance.
A kit for fitting a tibial insert, the kit comprising:
- a tibial insert, comprising:
- a base;
- a resistance-actuated posterior stabilizing post coupled to the base and configured to move relative to the base;
- and
- an anchoring member;
- and
- a plurality of a resistance members having different amounts of resistance, each resistance member sized to couple to the base and to compress or extend when the posterior stabilizing post slides relative to the base.
A method of determining a desired resistance for a resistance member in a tibial insert, comprising:
- (a) placing, in a patient's joint, at least one trial tibial insert comprising a resistance-actuated posterior stabilizing post and a resistance member configured to interface with the post;
- (b) flexing the patient's joint at least twice, wherein at each flex a resistance member having a different resistance is caused to interface with the post, so causing the resistance member to compress or extend;
- (c) evaluating at least two fits of the trial insert relative to fitting criteria based on the flexing of step (b);
- and
- (d) determining a desired resistance for the resistance member based on the evaluation of the fits.
Dependencies are inferred from the claim text.