# US 10,478,314 B2 · Systems and methods for providing a femoral component

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- Number: US 10,478,314 B2
- Document ID: US10478314B2
- Status: Granted
- Kind: B2
- Application number: 16/011,493
- Filed: 2018-06-18
- Published: 2019-05-09
- Granted: 2019-11-19
- Earliest claimed: 2007-08-27
- Applicants: Connor E. Samuelson; Kent M. Samuelson
- Inventors: Connor E. Samuelson; Kent M. Samuelson
- Web page: https://patentgrep.com/patent/US10478314B2

## CPC

- A61F 2/46: Special tools for implanting artificial joints
- A61B 17/155: {Cutting femur}
- A61B 17/1675: {for the knee}
- A61F 2/30734: {Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect}
- A61F 2/30756: {Cartilage endoprostheses (A61F2/3603 takes precedence)}
- A61F 2/30767: {Special external or bone-contacting surface, e.g. coating for improving bone ingrowth}
- A61F 2/38: for elbows or knees
- A61F 2/3859: {Femoral components}
- A61F 2/3886: {for stabilising knees against anterior or lateral dislocations}
- A61F 2/389: {Tibial components (A61F2/3868 takes precedence)}
- A61F 2/30965: {Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping}
- A61F 2/3877: {Patellae or trochleae}
- A61F 2002/30116: {partial circles, i.e. circular segments}
- A61F 2002/30245: {Partial spheres}
- A61F 2002/30604: {modular}
- A61F 2002/30607: {Kits of prosthetic parts to be assembled in various combinations for forming different prostheses}
- A61F 2002/30934: {Special articulating surfaces}
- A61F 2002/3863: {Condyles fitted on an anchored base}
- A61F 2002/3895: {unicompartimental}
- A61F 2230/0006: circular
- A61F 2230/0071: spherical
- A61F 2310/00011: Metals or alloys
- A61F 2310/00179: Ceramics or ceramic-like structures
- A61F 2310/00329: Glasses, e.g. bioglass
- A61F 2310/00353: Bone cement, e.g. polymethylmethacrylate or PMMA
- 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

Systems and methods for providing deeper knee flexion capabilities. In some instances, such systems and methods include a femoral knee replacement component that includes an articular surface, a first interior surface, and a second interior surface, wherein the first and second interior surfaces run substantially parallel to each other. In some cases, the articular surface includes an anterior condylar extension that is configured to replace an anterior articular cartilage of a femur such that the anterior extension is configured to terminate adjacent to a proximal limit of the anterior articular cartilage of the femur. Other implementations are also discussed.

## Claims

### Claim 1

A knee prosthesis comprising:
a femoral component for replacing at least a portion of a distal end of a femur, the femoral component comprising:
posterior medial condylar component;
a medial femoral articular surface on the posterior medial condylar component; and
a proximal extension that extends at a proximal portion of the posterior medial condylar component,
wherein an articular surface of the proximal extension provides an indented articulation surface that is configured to articulate against a portion of at least one of a tibia and a tibial component.

### Claim 2 (depends on 1)

The knee prosthesis of claim 1, wherein the femoral component includes a modular attachment, and wherein the proximal extension is formed on the modular attachment.

### Claim 3 (depends on 1)

The knee prosthesis of claim 1, wherein a portion of the femoral component is configured to seat with in a concave, resectioned portion of a popliteal surface of the femur.

### Claim 4 (depends on 1)

The knee prosthesis of claim 1, wherein the femoral component comprises a medial condyle, a lateral condyle, and a patellar groove disposed between the medial and lateral condyles, wherein a medial-lateral width of an articulation surface of the lateral condyle is approximately 75% or less of a medial-lateral width of an articulation surface of the medial condyle.

### Claim 5 (depends on 4)

The knee prosthesis of claim 4, wherein the patellar groove extends medially at an angle from a proximal anterior portion of the femoral component to a distal anterior portion of the femoral component and to a distal posterior portion of the femoral component.

### Claim 6 (depends on 1)

The knee prosthesis of claim 1, wherein the knee prosthesis includes a tibial component comprising a raised articulation surface that is configured to articulate against the articular surface of the proximal extension.

### Claim 7 (depends on 1)

The knee prosthesis of claim 1, wherein the knee prosthesis includes a tibial component, and wherein a lateral condylar surface of the tibial component comprises a concave articulation surface having a center or rotation with a lowest point disposed from a posterior edge of the tibial component by between about 18% and about 30% of a total anteroposterior dimension of the tibial component.

### Claim 8 (depends on 2)

The knee prosthesis of claim 2, wherein the modular attachment includes a first portion roughly perpendicular to a second portion, wherein the first portion of the modular attachment includes a flanged articular area, and wherein the second portion includes an elongated stem.

### Claim 9 (depends on 8)

The knee prosthesis of claim 8, wherein the elongated stem comprises a first side and a second side, and wherein the elongated stem comprises a nodule on at least one of the first side and the second side.

### Claim 10 (depends on 1)

The knee prosthesis of claim 1, wherein the indented articulation surface of the proximal extension comprises a concave articulation surface.

### Claim 11

A method for placing a femoral component on a femur, the method comprising:
resecting articular cartilage from a distal portion of the femur, wherein the articular cartilage is removed from at least one of the femur's anterior condyles to within about 0 mm and about 15 mm of a proximal limit of the articular cartilage; and
positioning the femoral component onto the femur so that an anterior-most extension of the femoral component terminates within about 15 mm of the proximal limit.

### Claim 12 (depends on 11)

The method of claim 11, further comprising preparing the femur to receive the femoral component by resecting bone from a popliteal surface of the femur.

### Claim 13 (depends on 11)

The method of claim 11, wherein the femoral component comprises a first interior surface and a second interior surface, and wherein the first and second interior surfaces diverge from being parallel with each other by between about 0° and about 45°.

### Claim 14 (depends on 11)

The method of claim 11, wherein the femoral component comprises a first interior surface and a second interior surface, and wherein the first and the second interior surfaces diverge from being parallel with each other by between approximately 5° and approximately 10°.

### Claim 15 (depends on 13)

The method of claim 13, wherein the first interior surface corresponds to an anterior chamfer cut on the femur.

### Claim 16 (depends on 13)

The method of claim 13, wherein the second interior surface corresponds to a full flexion cut at an antero-proximal portion of a posterior condyle of the femur.

### Claim 17 (depends on 11)

The method of claim 11, wherein the femoral component comprises a complete femoral knee prosthesis.

### Claim 18 (depends on 11)

The method of claim 11, wherein the femoral component comprises a unicompartmental femoral knee prosthesis.

### Claim 19 (depends on 11)

The method of claim 11, further comprising press-fitting the femoral component to the resectioned femur.

### Claim 20 (depends on 11)

The method of claim 11, wherein the femoral component further comprises a concave articulation surface disposed near a posterior and proximal surface of the femoral component, wherein the concave articulation surface is configured to articulate against at least one of a tibia and a tibial component.