# US 2019/0240033 A1 · Tibial trial system for a knee prosthesis and method

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- Number: US 2019/0240033 A1
- Document ID: US20190240033A1
- Status: Published application
- Kind: A1
- Application number: 16/390,667
- Filed: 2019-04-22
- Published: 2019-08-08
- Earliest claimed: 2014-04-30
- Assignees: Depuy Ireland Unlimited Company
- Applicants: Depuy Ireland Unlimited Company
- Inventors: David W. Waite, II; Aaron J. Matyas; Duncan G. Young; Scott M. Thomas
- Web page: https://patentgrep.com/patent/US20190240033A1

## CPC

- A61F 2/389: {Tibial components (A61F2/3868 takes precedence)}
- A61B 17/1675: {for the knee}
- A61B 17/1764: {for the knee}
- A61F 2/4684: {Trial or dummy prostheses}
- A61B 2017/0046: {with a releasable handle; with handle and operating part separable}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An orthopaedic surgical instrument system for use during a surgical procedure to implant an orthopaedic knee prosthesis includes a tibial base trial component adapted to be positioned on a surgically-prepared proximal end of a patient's tibia and an insert component shaped to be received in an opening defined in the tibial base trial component. The insert component has a base plate and a central post extending upwardly from a superior surface of the base plate. A superior surface of the central post has a ramp surface defined therein, with the ramp surface inclining superiorly in the anterior-to-posterior direction.

## Claims

### Claim 1

An orthopaedic surgical instrument system for use during a surgical procedure to implant an orthopaedic knee prosthesis, comprising:
a tibial base trial component adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial base trial component having an opening defined therein, and
an insert component shaped to be received in the opening defined in the tibial base trial component, the insert component having a base plate and a central post extending upwardly from a superior surface of the base plate, wherein a superior surface of the central post has a ramp surface defined therein, the ramp surface inclines superiorly in an anterior-to-posterior direction.

### Claim 2 (depends on 1)

The orthopaedic surgical system of claim 1, wherein:
the central post comprises a collar extending outwardly from a longitudinal axis of the central post, and
the ramp surface is defined in a superior surface of the collar.

### Claim 3 (depends on 2)

The orthopaedic surgical system of claim 2, wherein:
the ramp surface defined in the collar has an anterior end and a posterior end,
the anterior end of the ramp surface defined in the collar is coplanar with the superior surface of the base plate, and
the posterior end of the ramp surface defined in the collar is spaced apart superiorly from the superior surface of the base plate.

### Claim 4 (depends on 1)

The orthopaedic surgical system of claim 1, wherein:
the central post comprises a connector configured to secure the insert component to a surgical handle,
the connector comprising a flange extending anteriorly away from the longitudinal axis of the central post, and
the ramp surface is defined in a superior surface of the flange of the connector.

### Claim 5 (depends on 1)

The orthopaedic surgical system of claim 1, wherein:
the central post further comprises an elongated anti-rotation lug extending in a direction away from the longitudinal axis of the central post, and
the ramp surface is defined in a superior surface of the elongated anti-rotation lug.

### Claim 6 (depends on 1)

The orthopaedic surgical system of claim 1, wherein:
the insert component comprises an inferior surface opposite its superior surface, and
the insert component defines a tibial evaluation component, the tibial evaluation component having a pair of bone engaging spikes extending inferiorly from the inferior surface of the insert component.

### Claim 7 (depends on 1)

The orthopaedic surgical system of claim 1, wherein:
the insert component comprises an inferior surface opposite its superior surface, and
the insert component defines a keel punch, the keel punch having a pair of serrated wings extending inferiorly from the inferior surface of the insert component.

### Claim 8 (depends on 7)

The surgical instrument of claim 7, wherein:
the insert component further comprises a tapered cylindrical post extending inferiorly from the inferior surface of the base plate, and
one of the pair of serrated wings is secured to a medial side of the tapered cylindrical post and extends medially therefrom, with the other serrated wing being secured to a lateral side of the tapered cylindrical post and extending laterally therefrom.

### Claim 9

An orthopaedic surgical instrument system for use during a surgical procedure to implant an orthopaedic knee prosthesis, comprising:
an insert component having a base plate and a central post extending upwardly from a superior surface of the base plate, wherein a superior surface of the central post has a ramp surface defined therein, the ramp surface inclines superiorly in an anterior-to-posterior direction, and
a tibial bearing trial component having an opening defined therein, the central post of the insert component being configured to be received in the opening of the tibial bearing trial component.

### Claim 10 (depends on 9)

The orthopaedic surgical system of claim 9, wherein:
the central post comprises a collar extending outwardly from a longitudinal axis of the central post, and
the ramp surface is defined in a superior surface of the collar.

### Claim 11 (depends on 10)

The orthopaedic surgical system of claim 10, wherein:
the ramp surface defined in the collar has an anterior end and a posterior end,
the anterior end of the ramp surface defined in the collar is coplanar with the superior surface of the base plate, and
the posterior end of the ramp surface defined in the collar is spaced apart superiorly from the superior surface of the base plate.

### Claim 12 (depends on 9)

The orthopaedic surgical system of claim 9, wherein:
the insert component comprises an inferior surface opposite its superior surface, and
the insert component defines a tibial evaluation component, the tibial evaluation component having a pair of bone engaging spikes extending inferiorly from the inferior surface of the insert component.

### Claim 13 (depends on 9)

The orthopaedic surgical system of claim 9, wherein the tibial bearing trial component comprises:
a tibial bearing surface trial component having an articular surface, and
a shim removably secured to the tibial bearing surface trial component.

### Claim 14 (depends on 9)

The orthopaedic surgical system of claim 9, wherein:
the insert component comprises an inferior surface opposite its superior surface, and
the insert component defines a keel punch, the keel punch having a pair of serrated wings extending inferiorly from the inferior surface of the insert component.

### Claim 15 (depends on 14)

The surgical instrument of claim 14, wherein:
the insert component further comprises a tapered cylindrical post extending inferiorly from the inferior surface of the base plate, and
one of the pair of serrated wings is secured to a medial side of the tapered cylindrical post and extends medially therefrom, with the other serrated wing being secured to a lateral side of the tapered cylindrical post and extending laterally therefrom.

### Claim 16

An orthopaedic surgical instrument system for use during a surgical procedure to implant an orthopaedic knee prosthesis, comprising:
a tibial base trial component adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial base trial component having an opening defined therein, and
a plurality of insert components each shaped to be received in the opening defined in the tibial base trial component, the plurality of insert components each having a base plate and a central post extending upwardly from a superior surface of the base plate, wherein a superior surface of the central post has a ramp surface defined therein, the ramp surface inclines superiorly in an anterior-to-posterior direction.

### Claim 17 (depends on 16)

The orthopaedic surgical system of claim 16, wherein:
a first insert component of the plurality of insert components comprises an inferior surface opposite its superior surface, and
the first insert component defines a first tibial evaluation component, the first tibial evaluation component having a pair of bone engaging spikes extending inferiorly from the inferior surface of the first insert component.

### Claim 18 (depends on 17)

The orthopaedic surgical system of claim 17, wherein:
a second insert component of the plurality of insert components comprises an inferior surface opposite its superior surface, and
wherein the second insert component defines a second tibial evaluation component that is devoid of spikes extending inferiorly from the inferior surface of the second insert component.

### Claim 19 (depends on 18)

The orthopaedic surgical system of claim 18, wherein:
a third insert component of the plurality of insert components comprises an inferior surface opposite its superior surface, and
the third insert component defines a keel punch, the keel punch having a pair of serrated wings extending inferiorly from the inferior surface of the insert component.

### Claim 20 (depends on 17)

The orthopaedic surgical system of claim 17, wherein:
a third insert component of the plurality of insert components comprises an inferior surface opposite its superior surface, and
the third insert component defines a keel punch, the keel punch having a pair of serrated wings extending inferiorly from the inferior surface of the insert component.