CA2146180A1 - Suture anchor - Google Patents
Suture anchorInfo
- Publication number
- CA2146180A1 CA2146180A1 CA 2146180 CA2146180A CA2146180A1 CA 2146180 A1 CA2146180 A1 CA 2146180A1 CA 2146180 CA2146180 CA 2146180 CA 2146180 A CA2146180 A CA 2146180A CA 2146180 A1 CA2146180 A1 CA 2146180A1
- Authority
- CA
- Canada
- Prior art keywords
- suture anchor
- hole
- suture
- anchor according
- curved surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Abstract
The suture anchor has a generally cylindrical shape with a front portion (1), a rear portion (2), a longitudinal axis (3) and a curved surface (4) with protrusions (5).
A through-hole (6) is running transversely to said longitudinal axis (3) and two channels (7) are positioned on said curved surface (4) and extending from the orifices (8) of said through-hole (6) to said rear portion (2).
A through-hole (6) is running transversely to said longitudinal axis (3) and two channels (7) are positioned on said curved surface (4) and extending from the orifices (8) of said through-hole (6) to said rear portion (2).
Description
21~618~
SUTURE ANCHOR
FIELD OF THE INVENTION - -This invention relates to a suture anchor.
Sutures are used in surgery i.a. for attachment of soft tissue to bone. They are used in repair of tissue avulsions from bone as well as in reconstructive procedures, including reattaching avulsed tendons , ligaments and joint capsules to bone. The field of application extends to treatment of shoulder instability and rotator cuff tears, knee instability, maxillofacial surgery, hand surgery, and ligamentous repair of the foot, ankle and wrist.
The shoulder is of particulat interest because dislocation of this joint occurs more frequently than any other human joint causing limitation of motion and pain in athletes and nonathletes of all ages.
Anchoring of the suture is either made directly in the bone mass or by means of an anchor to be inplanted in the bone.
3 21~6180 BACKGROUND ART
The classic BANKART procedure is a widely accepted method of treating anterior-inferior gleno-humeral instability, using sutures that are inserted directly through transosseous tunnels without an anchor. Although the surgical exposure involves minimal trauma and skin incision and leads to excellent clinical results with reported recurrence rates of 3.5% to 4.0%, the procedure of reattaching the torn ligament or tendon can be time consuming and difficult. While modifications that decrease the operating time for standard rotator cuff and Bankart lesion repairs are available, these approaches are technically demanding.
The use of staples has a tendency to cut through the bone and tendon.
A metallic suture anchor is known from US 4,632,100 SOMERS ET AL.
having a generally cylindrical shape. Its curved surface has a drill portion at the front and a threaded portion at the rear end. After implantation of the anchor into the bone mass the suture is fixed in a central bore of the anchor.
There are several disadvantages related to the suture anchor according to SOMERS:
- the suture is retained in the device by means of a knot which is held in the device by a disc; this does not allow for the surgeon to use the sliding knot technique;
4 2~6180 - in order to help prevent the knot coming undone within the device and or pulling through the hole, a biocompatible cement is applied to the knot; this is an additional manufacturing process;
- the knot with or without cement may reduce the ultimate tensile strength of the suture;
- the suture retaining disc is a press fit into-the hole; under load the disc may become loose and pull out of the hole; and - the suture is pre-attached; this may restrict the clinicians choice of suture material.
21461~0 SUMMARY OF THE INVENTION
The invention as claimed aims at solving the above described problems by providing a suture anchor having the following advantages of prior art devices:
- prior to and upon installation in the bone the suture is free to slide within the device and bone; this has the advantage that the surgeon can use the sliding knot technique;
- the suture is retained by passing through a hole within the body of the device; no reduction of the ultimate tensile strength of the suture material occurs;
the suture is not pre-attached; this no restriction on the choice of suture material occurs;
- the risk for infection is kept to a minimum since the skin is opened only once.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming part of this disclosure. For the better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings, examples and descriptive matter in which are illustrated and described preferred embodiments of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
Fig. 1 is a perspective view of the suture anchor according to the invention prior to introduction of the suture; and Fig. 2 is a perspective view of the suture anchor according to the invention after introduction of the suture.
DETAILED DESCRIPTION OF THE INVENTION
The suture anchor as represented in Figs. 1 and 2 has a generally cylindrical shape with a front portion 1, a rear portion 2 and a longitudinal axis 3.
The curved surface 4 of the suture anchor is provided with protrusions S in the form of a thread running over the full length of the anchor to facilitate retention of the suture anchor in cortical bone or cortical and cancellous bone.
Instead of threads it would be possible to use also other types of protrusions, e.g. barbs.
The front portion 1 is chamfered in order to facilitate easy introduction of the suture anchor into the bone mass.
The rear portion 2 is provided with connection means 9 in the form of two holes for receiving a manipulation instrument having two pins corresponding to these holes.
7 2 14~18 ~
A through-hole 6 is running transversely to the longitudinal axis 3 of the anchor and is destined to receive the suture 10. The through-hole 6 is located at a distance from the front portion 1 which corresponds to 5 to 25 % of the total length of said suture anchor. This location results in maximum streng~h of the suture fixation.
Two channels 7 are positioned on the curved surface 4 and extend from the orifices 8 of the through-hole 6 to the rear portion 2.
The function of the channels 7 is to take up the suture 10 - as shown in Fig. 2 - after its introduction in the through-hole 6 and to prevent its blocking between the curved surface 4 and the bone mass (the suture 10 is passed through the through-hole 6 prior to insertion of the anchor into the bone mass). To this effect the depth of these channels 7 should exceed the diameter of the through-hole 6.
The course of the through-hole 6 is either straight, rendering easy its manufacture, or preferably curved whereby its apex is facing said front portion 1. The curved configuration allows a smooth running of the suture 10 within the through-hole 6 and prevents sharp edges which could lead to damage of the suture 10.
The suture anchor can be made of any known implant material, e.g.
stainless steel or titanium. Preferably it is made of a resorbable material, e.g. a polylactide. In the presence of enzymes in the human body, polylactides degrade to lactic acid, and subsequently to carbon dioxide and water. These are removed from the body via respiratory routes and kidneys respectively.
By using resorbable materials irritation of soft tissue from metallic corrosion is eliminated. It also eliminates interference with certain imaging diagnostic or therapeutic treatments near the site, such as magnetic resonance imaging, and where the use of such imaging is indicated any metal implants may first have to be surgically removed.
While the foregoing description and drawings represent the preferred embodiments of the present invention, it will be obvious for those skilled in the art that various changes and modifications may be made therein without departing from the true spirit and scope of the present invention.
SUTURE ANCHOR
FIELD OF THE INVENTION - -This invention relates to a suture anchor.
Sutures are used in surgery i.a. for attachment of soft tissue to bone. They are used in repair of tissue avulsions from bone as well as in reconstructive procedures, including reattaching avulsed tendons , ligaments and joint capsules to bone. The field of application extends to treatment of shoulder instability and rotator cuff tears, knee instability, maxillofacial surgery, hand surgery, and ligamentous repair of the foot, ankle and wrist.
The shoulder is of particulat interest because dislocation of this joint occurs more frequently than any other human joint causing limitation of motion and pain in athletes and nonathletes of all ages.
Anchoring of the suture is either made directly in the bone mass or by means of an anchor to be inplanted in the bone.
3 21~6180 BACKGROUND ART
The classic BANKART procedure is a widely accepted method of treating anterior-inferior gleno-humeral instability, using sutures that are inserted directly through transosseous tunnels without an anchor. Although the surgical exposure involves minimal trauma and skin incision and leads to excellent clinical results with reported recurrence rates of 3.5% to 4.0%, the procedure of reattaching the torn ligament or tendon can be time consuming and difficult. While modifications that decrease the operating time for standard rotator cuff and Bankart lesion repairs are available, these approaches are technically demanding.
The use of staples has a tendency to cut through the bone and tendon.
A metallic suture anchor is known from US 4,632,100 SOMERS ET AL.
having a generally cylindrical shape. Its curved surface has a drill portion at the front and a threaded portion at the rear end. After implantation of the anchor into the bone mass the suture is fixed in a central bore of the anchor.
There are several disadvantages related to the suture anchor according to SOMERS:
- the suture is retained in the device by means of a knot which is held in the device by a disc; this does not allow for the surgeon to use the sliding knot technique;
4 2~6180 - in order to help prevent the knot coming undone within the device and or pulling through the hole, a biocompatible cement is applied to the knot; this is an additional manufacturing process;
- the knot with or without cement may reduce the ultimate tensile strength of the suture;
- the suture retaining disc is a press fit into-the hole; under load the disc may become loose and pull out of the hole; and - the suture is pre-attached; this may restrict the clinicians choice of suture material.
21461~0 SUMMARY OF THE INVENTION
The invention as claimed aims at solving the above described problems by providing a suture anchor having the following advantages of prior art devices:
- prior to and upon installation in the bone the suture is free to slide within the device and bone; this has the advantage that the surgeon can use the sliding knot technique;
- the suture is retained by passing through a hole within the body of the device; no reduction of the ultimate tensile strength of the suture material occurs;
the suture is not pre-attached; this no restriction on the choice of suture material occurs;
- the risk for infection is kept to a minimum since the skin is opened only once.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming part of this disclosure. For the better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings, examples and descriptive matter in which are illustrated and described preferred embodiments of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
Fig. 1 is a perspective view of the suture anchor according to the invention prior to introduction of the suture; and Fig. 2 is a perspective view of the suture anchor according to the invention after introduction of the suture.
DETAILED DESCRIPTION OF THE INVENTION
The suture anchor as represented in Figs. 1 and 2 has a generally cylindrical shape with a front portion 1, a rear portion 2 and a longitudinal axis 3.
The curved surface 4 of the suture anchor is provided with protrusions S in the form of a thread running over the full length of the anchor to facilitate retention of the suture anchor in cortical bone or cortical and cancellous bone.
Instead of threads it would be possible to use also other types of protrusions, e.g. barbs.
The front portion 1 is chamfered in order to facilitate easy introduction of the suture anchor into the bone mass.
The rear portion 2 is provided with connection means 9 in the form of two holes for receiving a manipulation instrument having two pins corresponding to these holes.
7 2 14~18 ~
A through-hole 6 is running transversely to the longitudinal axis 3 of the anchor and is destined to receive the suture 10. The through-hole 6 is located at a distance from the front portion 1 which corresponds to 5 to 25 % of the total length of said suture anchor. This location results in maximum streng~h of the suture fixation.
Two channels 7 are positioned on the curved surface 4 and extend from the orifices 8 of the through-hole 6 to the rear portion 2.
The function of the channels 7 is to take up the suture 10 - as shown in Fig. 2 - after its introduction in the through-hole 6 and to prevent its blocking between the curved surface 4 and the bone mass (the suture 10 is passed through the through-hole 6 prior to insertion of the anchor into the bone mass). To this effect the depth of these channels 7 should exceed the diameter of the through-hole 6.
The course of the through-hole 6 is either straight, rendering easy its manufacture, or preferably curved whereby its apex is facing said front portion 1. The curved configuration allows a smooth running of the suture 10 within the through-hole 6 and prevents sharp edges which could lead to damage of the suture 10.
The suture anchor can be made of any known implant material, e.g.
stainless steel or titanium. Preferably it is made of a resorbable material, e.g. a polylactide. In the presence of enzymes in the human body, polylactides degrade to lactic acid, and subsequently to carbon dioxide and water. These are removed from the body via respiratory routes and kidneys respectively.
By using resorbable materials irritation of soft tissue from metallic corrosion is eliminated. It also eliminates interference with certain imaging diagnostic or therapeutic treatments near the site, such as magnetic resonance imaging, and where the use of such imaging is indicated any metal implants may first have to be surgically removed.
While the foregoing description and drawings represent the preferred embodiments of the present invention, it will be obvious for those skilled in the art that various changes and modifications may be made therein without departing from the true spirit and scope of the present invention.
Claims (9)
1. Suture anchor of a generally cylindrical shape having a front portion (1), a rear portion (2), a longitudinal axis (3) and a curved surface (4), characterized in that is further provided with A) a through-hole (6) running transversely to said longitudinal axis (3); and B) two channels (7) positioned on said curved surface (4) and extending from the orifices (8) of said through-hole (6) to said rear portion (2).
2. Suture anchor according to claim 1, characterized in that said through-hole (6) is located at a distance from said front portion (1) which corresponds to 5 to 25 % of the total length of said suture anchor.
3. Suture anchor according to claim 1, characterized in that said through-hole (6) is curved whereby its apex is facing said front portion (1).
4. Suture anchor according to claim 1, characterized in that said channels (7) have a depth exceeding the diameter of said through-hole (6).
5. Suture anchor according to claim 1, characterized in that said rear portion (2) is provided with connection means (9) for releasably receiving a manipulation instrument.
6. Suture anchor according to claim 1, characterized in that it is made from a resorbable material, preferably from a polylactide.
7. Suture anchor according to claim 1, characterized in that said curved surface (4) is provided with protrusions (5).
8. Suture anchor according to claim 7, characterized in that said protrusions (5) are threads or barbs.
9. Suture anchor according to claim 1, characterized in that said front portion (1) is chamfered.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31805994A | 1994-10-04 | 1994-10-04 | |
| US318,059 | 1994-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2146180A1 true CA2146180A1 (en) | 1996-04-05 |
Family
ID=23236453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2146180 Abandoned CA2146180A1 (en) | 1994-10-04 | 1995-04-03 | Suture anchor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2146180A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10582957B2 (en) | 2014-09-19 | 2020-03-10 | Crossroads Extremity Systems, Llc | Bone fixation implant and means of fixation |
-
1995
- 1995-04-03 CA CA 2146180 patent/CA2146180A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10582957B2 (en) | 2014-09-19 | 2020-03-10 | Crossroads Extremity Systems, Llc | Bone fixation implant and means of fixation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |