# US 12,758,287 B2 · Devices having porous structures and methods for using the same

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- Number: US 12,758,287 B2
- Document ID: US12758287B2
- Status: Granted
- Kind: B2
- Application number: 18/596,364
- Filed: 2024-03-05
- Published: 2025-09-11
- Granted: 2026-10-13
- Earliest claimed: 2016-08-11
- Assignees: Mighty Oak Medical, Inc.
- Applicants: Mighty Oak Medical, Inc.
- Inventors: George Frey; Caleb Voelkel; Sean Starkman; Adam Jensen
- Web page: https://patentgrep.com/patent/US12758287B2

## CPC

- A61B 17/8625: {Shanks, i.e. parts contacting bone tissue}
- A61B 17/866: {Material or manufacture}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The present disclosure includes fixation devices, such as an orthopedic screw or implant, that comprises one or more porous elements or fenestrations to aid in osteo-integration of the fixation device. The fixation device may be additively manufactured using biocompatible materials such that the solid and porous aspects of the screw are fused together into a single construct. In yet another aspect, the fixation device comprises at least a portion or section incorporating a porous structure, which enables bony ingrowth through the porous section/portion of the screw, and thereby facilitates biocompatibility and improve mechanical characteristics. Methods for using the fixation device are also described herein.

## Claims

### Claim 1

A device configured for fixation to a particular anatomical feature comprising:
a shaft having a proximal portion and a distal portion, the shaft comprising at least one thread;
the shaft further comprising at least a first porous gradient and second porous gradient;
the first porous gradient being located towards the distal end of the shaft and containing a first porosity;
the second porous gradient being located proximal to the first porous gradient and containing a second porosity; and
the shaft having a diameter formed from patient-specific data to match the patient's anatomy.

### Claim 2 (depends on 1)

The device of claim 1, wherein a density of the first porous gradient is greater than a density of the second porous gradient.

### Claim 3 (depends on 1)

The device of claim 1, further composing an internal channel extending substantially an entire length of the shaft.

### Claim 4 (depends on 3)

The device of claim 3, wherein the at least first and second porous gradients are exposed to the internal channel and configured to receive graft material.

### Claim 5 (depends on 3)

The device of claim 3, wherein the internal channel is further comprised of a porous matrix.

### Claim 6 (depends on 3)

The device of claim 3, wherein the internal channel is substantially cylindrical.

### Claim 7 (depends on 1)

The device of claim 1, wherein a depth of the at least first and second porous gradient is variable.

### Claim 8 (depends on 1)

The device of claim 1, wherein the shaft diameter is variable.

### Claim 9 (depends on 8)

The device of claim 8, wherein the variability of the shaft diameter is determined based on patient images selected from the following list: X-ray, MRI, or CT.

### Claim 10 (depends on 8)

The device of claim 8, wherein the variability of the shaft diameter is determined based on a presurgical implant trajectory.

### Claim 11 (depends on 8)

The device of claim 8, wherein the variability of the shaft diameter is determined based on a location of cortical bone in a patient's boney anatomy.

### Claim 12 (depends on 11)

The device of claim 11, wherein the location of cortical bone is determined by patient imaging.

### Claim 13 (depends on 1)

The device of claim 1, wherein the device is fabricated by additive manufacturing.

### Claim 14 (depends on 1)

The device of claim 1, wherein the at least first and second porous gradient comprise cupping channels configured to collect biological material.

### Claim 15 (depends on 1)

The device of claim 1, wherein the at least one thread comprises at least one cupping channel configured to collect biological material.