Posterior stabilized insert trial with adjustable post
AssigneeSmith & Nephew, Inc.
InventorsJason S. Jordan, Theodore P. Firestone
Life of this patent
Estimating the term…
Abstract
Trial joint inserts have posts at different positions relative to the base. During joint replacement surgery, a surgeon can test different positions for a post using a trial insert, identify a suitable position for the post, and then select a permanent insert with a post in the desired position. The devices and methods in this application allow a surgeon to provide an individualized joint replacement for a patient. Joint inserts may be configured so the post moves relative to the base. The post may be adjustably positionable, may lock in place, or may be actuated by a resistance member such as a spring.
Claims31
An orthopedic insert comprising:
- a base;
- and
- a posterior stabilizing post coupled to the base, which post is adjustably positionable relative to the base.
A knee implant comprising:
- a tibial component shaped to align with and support the proximal end of a patient's tibia;
- a femoral component shaped to align with and support the patient's femur;
- and
- a tibial insert comprising a base and a posterior stabilizing post coupled to the base, which post is adjustably positionable relative to the base.
A method of selecting a load-bearing tibial insert, comprising:
- placing a trial tibial insert in a patient, the trial insert comprising a base and a sliding posterior stabilizing post;
- evaluating at least two fits of the trial insert relative to fitting criteria, wherein the first fit includes the post located at a first position relative to the base and the second fit includes the post located at a second position relative to the base;
- determining a desired location of the post based on the evaluation of the fits;
- and
- selecting a load-bearing tibial insert comprising a base connected to a posterior stabilizing post at a position corresponding to the determined location.
A method of selecting a load-bearing tibial insert, comprising:
- placing a trial tibial insert in a patient, the trial insert comprising a base and a posterior stabilizing post, which post is adjustably positionable relative to the base;
- evaluating at least two fits of the trial insert relative to fitting criteria, wherein the first fit includes the post located at a first position relative to the base and the second fit includes the post located at a second position relative to the base;
- determining a desired location of the post based on the evaluation of the fits;
- and
- selecting a load-bearing tibial insert comprising a base connected to a posterior stabilizing post at a position corresponding to the determined location.
A tibial insert comprising:
- a base;
- a posterior stabilizing post coupled to the base and configured to slide relative to the base;
- and
- a resistance member disposed within the base, wherein the resistance member compresses or extends when the posterior stabilizing post slides with respect to the base.
A tibial insert comprising:
- a base;
- and
- a spring-actuated posterior stabilizing post coupled to the base and configured to slide relative to the base;
- wherein the spring compresses or extends when the posterior stabilizing post slides with respect to the base.
A method of selecting a load-bearing tibial insert, comprising:
- sequentially placing at least two trial inserts in a patient, each trial insert comprising a base immovably connected to a posterior stabilizing post, the post being disposed at a different location on the base in each trial insert;
- evaluating a fit of each trial insert relative to fitting criteria;
- determining a desired location of the post based on the evaluation of the fits;
- and
- selecting a load-bearing tibial insert comprising a base immovably connected to a posterior stabilizing post at a position corresponding to the determined location.
A kit comprising at least two tibial inserts, each insert comprising:
- a base;
- and
- a posterior stabilizing post immovably coupled to the base, the post being disposed at a different location on the base in each insert.
Dependencies are inferred from the claim text.