# US 8,771,315 B2 · Composite anchor

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- Number: US 8,771,315 B2
- Document ID: US8771315B2
- Status: Granted
- Kind: B2
- Application number: 12/632,220
- Filed: 2009-12-07
- Published: 2010-06-17
- Granted: 2014-07-08
- Earliest claimed: 2008-12-15
- Assignees: Smith & Nephew, Inc.
- Applicants: Richard M. Lunn; David A. Paulk
- Inventors: Richard M. Lunn; David A. Paulk
- Web page: https://patentgrep.com/patent/US8771315B2

## CPC

- A61B 17/0401: {Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors (A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811)}
- A61B 2017/044: {with a threaded shaft, e.g. screws}
- A61B 2017/0445: {cannulated, e.g. with a longitudinal through-hole for passage of an instrument}
- A61B 2017/0448: {Additional elements on or within the anchor}
- A61B 2017/0451: {Cams or wedges holding the suture by friction}
- A61B 2017/0458: {Longitudinal through hole, e.g. suture blocked by a distal suture knot}
- A61B 2017/0464: {for soft tissue}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The present disclosure relates to a composite anchor. The anchor includes a cannulated proximal portion having a threaded outer surface and a distal portion coupled to the proximal portion, the distal portion including a top portion, a bottom portion, and a through hole, wherein the top portion is configured to be disposed within the cannulation of the proximal portion.

## Claims

### Claim 1

A composite anchor system comprising:
a composite anchor comprising:
a cannulated proximal portion comprising a threaded outer surface and inner surface;
a distal portion coupled to the proximal portion, the distal portion comprising a top portion, a bottom portion, and a through hole, wherein the top portion is configured to be disposed within the cannulation of the proximal portion;
wherein the top portion of the distal portion comprises at least two sides and a middle portion formed between the at least two sides;
wherein the through hole is positioned distal to the proximal portion, the through hole being in communication with the cannulation of the proximal portion via a channel adjacent to the middle portion; and
a driver configured to engage a substantial length of the inner surface of the proximal portion.

### Claim 2 (depends on 1)

The anchor of claim 1 wherein the bottom portion is substantially cone-shaped.

### Claim 3 (depends on 1)

The anchor of claim 1, wherein the at least two sides are substantially trapezoid-shaped and the middle portion is substantially round.

### Claim 4 (depends on 1)

The anchor of claim 1 wherein the anchor further comprises at least one suture disposed within the through hole and extending through the cannulation of the proximal portion.

### Claim 5 (depends on 1)

The anchor of claim 1 wherein both the proximal portion and the distal portion include absorbable material.

### Claim 6 (depends on 1)

The anchor of claim 1 wherein the proximal portion includes absorbable material and the distal portion includes non-absorbable material.

### Claim 7 (depends on 6)

The anchor of claim 6 wherein the absorbable material includes a polymer material and the non-absorbable material includes a polymer material.

### Claim 8 (depends on 6)

The anchor of claim 6 wherein the absorbable material includes a polymer material and the non-absorbable material includes a metal material.

### Claim 9 (depends on 1)

The anchor of claim 1 wherein the proximal portion and the distal portion are coupled by way of an interference fit.

### Claim 10 (depends on 1)

The anchor of claim 1 wherein the proximal portion and the distal portion are coupled by way of a sonic weld.

### Claim 11

A composite anchor system comprising:
a composite anchor comprising:
an absorbable cannulated proximal portion comprising a threaded outer surface and inner surface;
a non-absorbable distal portion coupled to the absorbable cannulated proximal portion, the non-absorbable distal portion comprising a top portion, a bottom portion, and a through hole, wherein the top portion is configured to be disposed within the cannulation of the absorbable cannulated proximal portion;
wherein the top portion of the non-absorbable distal portion comprises at least two sides and a middle portion formed between the at least two sides;
wherein the through hole is positioned distal to the absorbable proximal portion, the through hole being in communication with the cannulation of the absorbable proximal portion via a channel adjacent to the middle portion; and
a driver configured to engage a substantial length of the inner surface of the absorbable cannulated proximal portion.