# US 11,890,022 B2 · Joint surface replacement system

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- Number: US 11,890,022 B2
- Document ID: US11890022B2
- Status: Granted
- Kind: B2
- Application number: 17/006,133
- Filed: 2020-08-28
- Published: 2020-12-17
- Granted: 2024-02-06
- Earliest claimed: 2016-12-01
- Assignees: Accufix Surgical, Inc.
- Applicants: Accufix Surgical, Inc.
- Inventors: Glenn C. Vitale; Michael Parisi; Wayne Conlan
- Web page: https://patentgrep.com/patent/US11890022B2

## CPC

- A61B 17/1659: {Surgical rasps, files, planes, or scrapers}
- A61B 17/1682: {for the foot or ankle}
- A61F 2/30771: {applied in original prostheses, e.g. holes or grooves}
- A61F 2/4225: {for feet, e.g. toes}
- A61F 2/4606: {of wrists or ankles; of hands, e.g. fingers; of feet, e.g. toes}
- A61B 17/1617: {with mobile or detachable parts}
- A61B 2017/564: {Methods for bone or joint treatment}
- A61F 2/30744: {End caps, e.g. for closing an endoprosthetic cavity}
- A61F 2/4603: {for insertion or extraction of endoprosthetic joints or of accessories thereof}
- A61F 2002/30176: {V-shaped}
- A61F 2002/30299: {umbrella-shaped or mushroom-shaped}
- A61F 2002/30378: {Spherically-shaped protrusion and recess}
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30654: {Details of the concave socket}
- A61F 2002/30736: {Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect}
- A61F 2002/3082: {Grooves}
- A61F 2002/30841: {Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes}
- A61F 2002/3085: {with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface}
- A61F 2002/30873: {Threadings machined on non-cylindrical external surfaces}
- A61F 2002/3093: {for promoting ingrowth of bone tissue}
- A61F 2002/4233: {for metatarso-phalangeal joints, i.e. MTP joints}
- A61F 2310/00017: Iron- or Fe-based alloys, e.g. stainless steel
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/00179: Ceramics or ceramic-like structures
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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)

## Abstract

The present invention relates to an articular joint replacement system. The system has first and second components. Each component has a tapered head piece for covering the end of a bone and for acting as an articular surface, an integrally formed screw stem having a length sufficient to extend into the medullary canal, and inwardly angled bone grips affixed to the underside of the head piece to allow solid fixation to the bone by compression press fit. The head piece of the first component is provided with a shaped exterior surface which complements the shaped exterior surface of the head piece of the second component and which allows motion in three planes.

## Claims

### Claim 1

A reamer tool apparatus for articular surface replacement comprising:
a one-piece instrument having a shank with a first end and a second end residing between a longitudinal length of the shank;
one or more staged blades residing at the second end of the shank, each staged blade having blade portions for simultaneously countersinking and surface grinding bone of the articular surface in a single step, the first blade portion has a first depth and the second blade portion has a second depth, wherein the first and second depths are in relation to a top surface of the staged double blade, the first depth of the first blade portion is deeper than the second depth of the second blade portion so that the countersinking and surface grinding provides two different depths within the bone.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein the staged blade comprises a double staged blade having a first blade portion and a second blade portion.

### Claim 3 (depends on 2)

The apparatus of claim 2 wherein the first blade portion resides adjacent the first end of the longitudinal length of the shank.

### Claim 4 (depends on 3)

The apparatus of claim 3 wherein the first blade portion comprises an inner curved blade portion of the staged double blade.

### Claim 5 (depends on 3)

The apparatus of claim 3 wherein the second blade portion resides adjacent the first blade portion.

### Claim 6 (depends on 5)

The apparatus of claim 5 wherein the second blade portion comprises an outer curved blade portion of the staged double blade.

### Claim 7 (depends on 1)

The apparatus of claim 1 wherein a plurality of staged blades reside at the second end of the shank.

### Claim 8 (depends on 1)

The apparatus of claim 1 further including a mating protrusion at the first end of the shank that fits into a bore in a screw component.

### Claim 9

A reamer tool apparatus for prepping bone for insertion of a screw component in articular surface replacement comprising:
a one-piece instrument having a shank with a longitudinal length and first and second ends at opposite ends of the longitudinal length;
a plurality of staged blades residing at the second end of the shank of the one-piece instrument, each staged blade having a first blade portion for countersinking the bone of the articular surface and a second blade portion for simultaneously surface grinding the bone within a single step using the one-piece instrument, the first blade portion has a first depth that extends farther away from the second end of the shank as compared to a second depth of the second blade portion.

### Claim 10 (depends on 9)

The apparatus of claim 9 wherein the first blade portion and the second blade portion both have curved bottom surfaces.

### Claim 11 (depends on 9)

The apparatus of claim 9 wherein the one-piece instrument includes at least three staged blades that circularly rotate in operation for simultaneously countersinking and surface grinding the bone.

### Claim 12 (depends on 9)

The apparatus of claim 9 further including a mating protrusion at the first end of the shank that fits into a bore in the screw component.

### Claim 13 (depends on 9)

The apparatus of claim 9 wherein edges reside on both the first and second blade portions that ream bone material for prepping the bone for insertion of the screw component.

### Claim 14

A method for prepping bone for articular surface replacement comprising:
providing a one-piece instrument having a shank and one or more staged double blades at an end thereof, each of the one or more staged double blades has a first blade portion and a second blade portion, the first blade portion has a first depth and the second blade portion has a second depth, wherein the first and second depths are in relation to a top surface of the staged double blade, the first depth of the first blade portion is deeper than the second depth of the second blade portion so that the countersinking and surface grinding provides two different depths within the bone;
rotating the one-piece instrument while making contact with the bone; and
reaming the bone using the one-piece instrument to simultaneously countersink and surface grind the bone via the one or more staged double blades within a single step.

### Claim 15 (depends on 14)

The method of claim 14 wherein each of the one or more staged double blades has a first blade portion for countersinking the bone and a second blade portion for simultaneously surface grinding the bone within the single step.

### Claim 16 (depends on 14)

The method of claim 14 wherein the one-piece instrument has at least three staged double blades.

### Claim 17 (depends on 14)

The method of claim 14 wherein edges reside on both the first and second blade portions for reaming bone material for prepping the bone for insertion of the screw component.