WO2000051497A1 - Suture anchor and associated method of implantation - Google Patents
Suture anchor and associated method of implantation Download PDFInfo
- Publication number
- WO2000051497A1 WO2000051497A1 PCT/US1999/029929 US9929929W WO0051497A1 WO 2000051497 A1 WO2000051497 A1 WO 2000051497A1 US 9929929 W US9929929 W US 9929929W WO 0051497 A1 WO0051497 A1 WO 0051497A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bore
- suture anchor
- suture
- bone
- leading
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0487—Suture clamps, clips or locks, e.g. for replacing suture knots; Instruments for applying or removing suture clamps, clips or locks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0409—Instruments for applying suture anchors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0414—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors having a suture-receiving opening, e.g. lateral opening
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0446—Means for attaching and blocking the suture in the suture anchor
- A61B2017/0458—Longitudinal through hole, e.g. suture blocked by a distal suture knot
Definitions
- the present invention relates to surgical implements and, more particularly, to suture anchors for enabling sutures to be attached to bone.
- suture anchors have been developed, providing an anchor in the bone to which a suture may be secured, wherein the suture is then used to secure the adjacent bodily tissue.
- Suture anchors generally are inserted into a bore formed in the bone.
- suture anchors including a barb-type anchor, a corkscrew type anchor, an insert type anchor with offset reorienting suture bore, and a wedge-type anchor.
- the suture anchor generally includes a first gripping portion, such as a sharp edge or a point, and is designed to rotate as it enters the bore or is in the process of being withdrawn therefrom. As the suture anchor rotates, the first gripping portion bites or penetrates the wall of the bore and causes further rotation of the anchor. At the opposite end of the suture anchor, a second gripping portion is typically provided.
- a first gripping portion such as a sharp edge or a point
- the second gripping portion penetrates into the wall of the bore generally opposite the first gripping portion as the suture anchor is rotated, thereby wedging the suture anchor within the bore.
- Bones generally include a number of trabeculae disposed throughout The spacing of the trabeculae within the intermedulary canal of the bone is often a good indicator of the density of the bone
- Cortical bone is solid bone without visible interstitial spaces and is typical of the midshafts, or diaphyseal regions, of long bones
- Metaphyseal and epiphyseal bone which is the bone around the joints at the opposing ends of the long bones, has a variable amount of cortical shells with a deeper trabecular structure, wherein the amount of cortical shells may vary greatly
- Dense bone typically has small and closely spaced trabeculae, resulting in a hard and strong bone
- less dense or osteoporotic bone has larger and more widely spaced trabeculae, typically resulting in a softer and generally weaker bone This less
- wedge-type suture anchors are found in U S Patent Nos 5,540,718, 5,626,612, 5,782,863, and 5,879,372 to Bartlett which disclose wedge- type suture anchors based on variants of cone, double cone, and combination cone and cylinder configurations Additionally, U S Patent No 5,683,418 to Luscombe et al assigned to Mitek Surgical Products, Inc , also the assignee of the present invention, discloses wedge-type suture anchors generally varying in shape from triangle to a quadrilateral Thus, U S Patent Nos 5,540,718, 5,626,612, 5,782,863, and 5,879,372 to Bartlett and U S Patent No 5,683,418 to Luscombe et al are incorporated in their entirety herein by reference
- the Luscombe et al '418 patent discloses suture anchors which are angularly shaped, generally approximating a triangle to a quadrilateral and having straight sides The intersections of major surfaces defining the perimeter of the suture anchor therefore define sharp transitions
- the device disclosed by the '418 patent is generally more useful in dense bone structures where the sharp gripping edges more effectively bite into the bore in the dense bone
- the '418 device generally experiences less rotation in both dense and less dense bone than is desirable to properly seat the anchor Rotation is further inhibited by the long straight surfaces defining the device
- the insertion tool used for implanting the suture anchor in the bore is formed from a material having a frangible portion at or near the interface with the anchor which breaks or separates from the anchor after implantation thereof
- the '418 device uses a metallic insertion tool which engages a bore in the anchor in a friction fit Both insertion tools may experience problems in that the tool with the frangible portion may not provide enough strength for manipulating the anchor within the bore, while the friction fit tool may be difficult to separate from the anchor after implantation thereof
- wedge-type suture anchors based on variants of cone, double cone, and combination cone and cylinder configurations These devices use the tip of the cone, or a truncation thereof, to form the edge which first bites into the bone and then provides the point about which the anchor rotates
- this main biting edge may be weaker and prone to breaking in high stress situations, such as where the anchor is being implanted in a dense bone structure
- wedge-type suture anchors generally use a suture, engaged with the anchor through a bore therein, to assist in rotating and seating the anchor within the bone
- the wedge-type suture anchors generally have the bore located between the main biting edge and the bore in which the insertion tool is inserted, thereby providing a small moment arm for rotating the suture anchor using the suture
- the suture may be less helpful in assisting the suture anchor to rotate within the
- the suture anchor comprises a body having a bore-abutting surface with a leading gripping edge at one end of the bore-abutting surface, a trailing gripping edge at the other end thereof, and a closing surface engaging the leading and trailing gripping edges generally opposite the bore-abutting surface.
- the body further defines a suture bore extending transversely therethrough and an inserter bore adapted to receive an insertion tool. A suture engages the suture anchor through the bore such that it is adapted to engage bodily tissue to be secured to the bone.
- the suture anchor is preferably quadri laterally shaped with the side having the longest dimension comprising the bore-abutting surface.
- a leading surface intersects one end of the bore-abutting surface at an acute angle to form the leading gripping edge.
- a trailing surface intersects the other end of the bore-abutting surface at an acute angle to form the trailing gripping edge.
- the configurations of both the leading and trailing gripping edges may be varied according to the structure of the bone in which the anchor is to be inserted.
- a closing surface having an arcuate portion and a substantially linear portion engages the ends of the leading and trailing surfaces, respectively, opposite the bore-abutting surface, to form a generally quadrilaterally shaped body.
- the body further defines a suture bore extending transversely therethrough and disposed adjacent the trailing gripping edge, wherein the suture bore may vary in size.
- the suture bore also engages a suture, wherein the suture passes through the suture bore and is adapted to engage bodily tissue adjacent the bore.
- the body defines an inserter bore adapted to receive an insertion tool.
- the inserter bore preferably extends through the leading surface such that it is angularly disposed with respect to the bore-abutting surface. More preferably, the inserter bore is disposed between the leading gripping edge and the suture bore and has a uniform cross- sectional shape along its length.
- the inserter bore preferably has a non-circular cross-section, where a generally square shape is most preferred.
- the suture anchor may also be varied in size and configuration according to characteristics and structure of the bone in the affected area of the body and the performance characteristics required of the suture anchor.
- the body of the suture anchor is comprised of a biocompatible material, with a bioabsorbable material being particularly desirable.
- the body may be comprised of, for instance, polylactic acid, polydioxanone, polyglycolic acid, or the like, with polylactic acid being most preferred.
- a further advantageous aspect of the present invention comprises an alternate embodiment of a suture anchor configured to permit knotless sutures to be used to secure bodily tissue to the adjacent bone structure.
- the alternate knotless embodiment of the present invention comprises generally the same suture anchor configuration as the embodiments previously described, but further including a notch in the bore-abutting surface and a suture forming a loop through the suture bore.
- the suture is adapted to engage the bodily tissue to be secured to the bone. Once the bodily tissue is engaged, the suture wraps back about the body and engages the notch. The body is then implanted into the bore in the bone to secure the bodily tissue thereto without requiring further knotting of the suture.
- Still another advantageous aspect of the present invention comprises an insertion tool for inserting a suture anchor within a bore in a bone.
- the insertion tool generally comprises a rigid shaft having opposed ends with a tip engaged with one end of the shaft.
- the tip further has a proximal end operably engaged with the shaft and a distal end adapted to be engaged with an inserter bore in a suture anchor
- the tip is preferably comprised of a shape memory material, such as a nickel-titanium alloy, with a non-circular cross-section corresponding to the cross- sectional shape of the inserter bore in the body
- it is further advantageous for the tip to have a uniform cross-sectional shape along its length to facilitate ease of separation from the inserter bore
- a non-circular or, more particularly, a generally square shape of the tip minimizes rotation of the suture anchor about the axis of the tip
- kits for anchoring a suture in a bore in a bone comprises at least one insertion tool and at least one suture anchor according to the previously described embodiments thereof At least one boring bit may also be included, with the bit capable of forming a bore of sufficient size in a bone to accommodate a provided suture anchor
- Another advantageous aspect of the present invention comprises a method of implanting a suture anchor within a bore in a bone
- a suture anchor is first urged into engagement with the bore using an insertion tool angled with respect to the bore such that a bore-abutting surface of the suture anchor is engaged with the wall of the bore
- the insertion tool is then elastically deformed to urge the suture anchor into the bore such that the bore-abutting surface remains engaged with the wall of the bore as the suture anchor is inserted
- the suture anchor is then manipulated within the bore by moving the insertion tool to the diametrically opposite side of the bore such that the suture anchor rotates about a leading gripping edge thereof
- the suture anchor is further rotated into a seated position within the bore by the exertion of a tensile force on the suture passing through the suture bore
- the suture anchor thus further rotates about the leading gripping edge, for example, up to about 90 degrees from its insertion angle, such that both the leading gripping edge and
- the leading gripping edge formed by the intersection of two surfaces provides a more robust structure than the tip of a cone, thereby providing a stronger suture anchor for high stress situations such as implantation of the anchor in high density bone
- the arcuate transition between the leading and trailing gripping edges facilitates rotation of the suture anchor in a bore in various bone structures, from dense cortical structures to less dense cancellous structures, thereby improving the seating ability of the suture anchor and requiring less effort to achieve the necessary rotation
- the trailing gripping edge formed by the intersection of two surfaces provides a sharp gripping edge which is desirable in a dense bone structure
- the sharp trailing gripping edge permits the suture anchor to engage the bore in a less dense bone structure after the anchor has been rotated to provide the high seating surface area which is desirable for a less dense bone structure
- the suture anchor according to embodiments of the present invention provides a mechanism for effectively anchoring a suture within a bore in
- FIG. 1 is a perspective view of one embodiment of the present invention showing a suture anchor engaging a suture and corresponding insertion tool
- FIG. 2 is a lateral view of the embodiment of the present invention as shown in FIG. 1
- FIG. 3 is a rear view of one embodiment of the present invention as shown in FIG. 1
- FIG. 4 is a perspective view of an alternate embodiment of the present invention showing a suture anchor engaging a suture and corresponding insertion tool
- FIG. 5 is a lateral view of the alternate embodiment of the present invention as shown in FIG. 4
- FIG. 6 shows multiple views of still another alternate embodiment of the present invention
- FIG. 6A shows multiple views of yet another alternate embodiment of the present invention
- FIGS. 7 - 14 show a cross-sectional sequence of insertion of a suture anchor into a bore in a bone in accordance with embodiments of the present invention
- FIG. 15 is a cross-sectional view of bodily tissue being attached to the bone by a suture anchored within the bone by a suture anchor in accordance with an embodiment of the present invention
- FIG. 16 shows an insertion tool for inserting a suture anchor into a bore in a bone according to one embodiment of the present invention
- FIG. 17 shows a boring tool for forming a bore in a bone in which a suture anchor is implanted according to one embodiment of the present invention
- FIG. 18 shows an alternate embodiment of the present invention comprising a knotless suture anchor
- the suture anchor 10 is preferably biocompatible and comprised of a bioabsorbable material, such as polylactic acid, polydioxanone, polyglycolic acid, and similar materials or blends thereof Such materials should preferably be recognized by the appropriate regulatory authority as being suitable for use in humans Additionally, it is desirable that the material strengthen the bone into which the anchor is inserted It is further desirable for the material to be translucent or transparent to noninvasive examinations such as radiographs (e g , X-rays) Accordingly, the suture anchor may also be comprised of cortical bone, where the bone may further be autologous or autogenous bone Generally, the suture anchor may be comprised of a suitable biocompatible polymer, biocompatible metal, or other biocompatible material (see, e g , U S Patent Nos 5,540,718, 5,626,612, 5,782,863, and 5,879,372 to Bartlett and U S Patent No 5,
- the bore-abutting surface 14 may be a flat surface in both the longitudinal and lateral directions, but is preferably flat in the longitudinal direction and curved or radiused in the lateral direction along the edge of the body 12
- the body 12 may also widen as it approaches the leading gripping edge 16 such that the leading gripping edge 16 is generally the widest portion of the body 12 Accordingly, both the bore-abutting surface 14 and the leading surface 18 are wider approaching the leading gripping edge 16
- the leading gripping edge 16 is preferably wide in order to distribute the anchoring stress over a greater surface area, as well as to strengthen the suture anchor 10, as is further explained herein
- the leading surface 18 is generally a flat surface and defines the inserter bore 26
- the inserter bore 26 is preferably located in the leading surface 18 in the vicinity where the leading surface 18 meets the arcuate portion 20a of the closing surface 20
- the inserter bore 26 extends into the body 12 towards the bore-abutting surface 14, thereby forming an acute angle with the leading surface 18
- the inserter bore 26 is preferably configured to receive the tip 52 of an insertion tool 50 for implanting the suture anchor 10 within the bone
- the inserter bore 26 and the tip 52 have corresponding non-circular lateral cross- sections, wherein the cross-sectional shapes are uniform along the lengths thereof
- the tip 52 of the insertion tool 50 is generally square, but may have beveled or radiused corners, and the inserter bore 26 is accordingly shaped to receive the tip 52
- the tip 52 of the insertion tool 50 may be any shape or configuration which minimizes rotation of the suture anchor 10 about the longitudinal axis of the tip 52
- at least the tip 52 of the insertion tool 50 is preferably formed from a material having elastic properties and, more preferably, superelastic properties, such as a shape memory material The elastic or superelastic properties of the material should be such that the tip 52 is not substantially permanently deformed during insertion and implantation of the suture anchor 10, thereby allowing the tip 52 to substantially return to an initial configuration (generally the configuration of the
- the suture anchor 10 may include a suture 30 engaged therewith through the suture bore 28.
- the suture bore 28 is disposed intermediate the bore-abutting surface 14 and the linear portion 20b of the closing surface 20, adjacent the trailing surface 22 and the trailing gripping edge 24.
- the suture bore 28 may vary in size and is preferably rounded or beveled around the openings in the body 12 in order to avoid abrasion of the suture 30.
- the suture bore 28 is disposed in the body 12 on the opposing side of the inserter bore 26 from the leading gripping edge 16. That is, the inserter bore 26 is most preferably disposed intermediate the leading gripping edge 16 and the suture bore 28.
- the leading gripping edge 16 provides a point about which the suture anchor 10 is rotated by a tensile force applied to the suture 30 threaded through the suture bore 28, disposing the suture bore 28 adjacent the trailing gripping edge 24 provides a larger moment arm for exerting the necessary rotational force on the suture anchor 10 via the suture 30.
- more turning torque may be exerted on the suture anchor 10 as compared to a suture anchor 10 having the suture bore 28 disposed on the opposite side of the inserter bore 26 and closer to the leading gripping edge 16.
- the suture anchor 10 is typically rotated within the bore in the bone until a seated position is attained, wherein the seated position is preferably up to about ninety degrees from the orientation in which the suture anchor 10 was initially inserted into the bore.
- the degree of rotation depends, at least in part, on the structure of the bone into which the suture anchor 10 is implanted.
- the closing surface 20 and the trailing surface 22 may be flat surfaces, but preferably are curved or radiused in the lateral direction for the lengths thereof.
- the inserter bore 26 cooperates with an insertion tool 50 to introduce the suture anchor 10 into a bore in a bone.
- the bore-abutting surface 14 lies flush with the wall of the bore, with the insertion tool 50 forcing it thereagainst.
- the closing surface 20 and, more specifically, the arcuate portion 20a defining the maximum width of the suture anchor 10 as measured perpendicularly from the bore-abutting surface 14, is disposed adjacent the wall of the bore diametrically opposite the leading gripping edge 16 Thereafter, moving the insertion tool 50 to the diametrically opposite side of the bore or applying a tensile force on the suture 30 outwardly of the bore tends to cause the suture anchor 10 to rotate such that the leading gripping edge 16 is driven into the wall of the bore
- the rotation of the suture anchor 10 is preferably initiated by moving the insertion tool 50 to the diametrically opposite side of the bore from which the insertion tool 50 initially introduced the anchor 10 into the bore Once the insertion tool 50 is removed from the inserter bore 26, tensile force on the suture 30 is used complete the rotation of the anchor 10 into
- the arcuate portion 20a of the closing surface 20 facilitates rotation of the suture anchor 10 about the leading gripping edge 16 as the insertion tool 50 is moved to the opposite side of the bore and/or a tensile force is applied to the suture 30
- the rotation of the suture anchor 10 continues until the intersection of the linear portion 20b of the closing surface 20 and the trailing surface 22 and/or the trailing gripping edge 24 begins to penetrate the wall of the bore opposite the leading gripping edge 16
- the rotation of the suture anchor 10 into the seated position is accomplished solely by exerting tensile force on the suture 30
- FIGS. 4 and 5 An alternate embodiment of the present invention is shown in FIGS. 4 and
- leading surface 118 further comprises a concave depression 119 therein immediately prior to intersection of the leading surface 118 and the bore-abutting surface 14
- the concave depression 119 thus redefines the leading gripping edge 16 as a scoop since it forms a more acute angle between the bore-abutting surface 14 and the leading surface 118
- the leading surface 218 is downwardly stepped between the inserter bore 26 and the leading gripping edge 216 Further, the bore- abutting surface 214 varies in width as it intersects the leading surface 218, thereby forming a reduced width leading gripping edge 216.
- a reduced width leading gripping edge 216 may be advantageous, for example, in dense bone structures where biting of the leading gripping edge 216 into the wall of the bore may be facilitated by a smaller and sharper structure.
- various dimensions of the suture anchor 10 may be varied according to the performance characteristics desired for the particular application.
- the increased dimensions BW and OW produce a larger and more robust suture anchor 10, which further requires a larger bore in the bone into which it is inserted.
- These characteristics may be advantageous where, for instance, larger bone structures are involved and/or it is anticipated that the bodily tissue to be fastened to the bone will experience higher stresses at the attachment thereto. In this instance, a larger and stronger suture anchor 10 may be desirable.
- the dimensions and configurations of the suture anchor 10 may be varied to adapt the suture anchor 10 to the requirements of the particular application.
- FIGS. 7 - 14 a method of implanting the suture anchor 10 in a bore in a bone is shown in FIGS. 7 - 14.
- a bore is first drilled in the bone using a boring bit 54.
- the bore generally passes through an outer layer of dense bone (cortical layer) and into an inner layer of a less dense or osteoporotic bone (cancellous layer) further therein.
- the boring bit 54 is removed.
- a suture anchor 10 is then prepared for insertion by inserting the tip 52 of an insertion tool 50 into the inserter bore 26.
- the suture anchor 10 typically includes a suture 30 threaded through the suture bore 28.
- the loose ends of the suture 30 are attached to the insertion tool 50 in order to secure the suture 30 and prevent it from becoming tangled or damaged during the insertion process.
- the suture anchor 10 is then introduced into the bore such that the bore-abutting surface 14 is engaged with the wall of the bore.
- the insertion tool 50 is in its original configuration (substantially straight), with the tip 52 inserted in the inserter bore 26 and angled with respect to the axis of the bore.
- the diameter of the bore roughly corresponds to the maximum width of the suture anchor 10, defined as the maximum perpendicular dimension from the bore-abutting surface 14.
- This maximum width of the suture anchor 10 is roughly along the portion of the body 12 corresponding to the arcuate portion 20a of the closing surface 20.
- the bore-abutting surface 14 is preferably contacting the wall of the bore, while the point defining the maximum width of suture anchor 10 (the arcuate portion 20a) is at least within close proximity to the wall of the bore diametrically opposite the bore-abutting surface 14.
- a force directed inwardly with respect to the bore is then exerted on the insertion tool 50 such that the suture anchor 10 is urged into the bore.
- the force causes the insertion tool 50 to bend such that distal end of the tip 52 remains in the inserter bore 26, but the portion of the tip 52 outside of the suture anchor 10 bends or deforms to conform to the wall of the bore.
- a portion of the bore-abutting surface 14 is still in contact with the dense cortical bone layer since suture anchor 10 has not been inserted far enough into the bore for the leading gripping edge 16 to pass by this bone layer.
- the bore-abutting surface 14, aided by the force provided by the tip 52 of the insertion tool 50 remains flush against the wall of the bore.
- FIG. 10 shows the suture anchor 10 after further force has been exerted on the insertion tool 50 inwardly with respect to the bore.
- the suture anchor 10 Once the suture anchor 10 has been inserted into the bore for a sufficient distance to clear the dense cortical surface layer of bone, it enters a less dense inner portion of the bone (the cancellous layer). Since the cancellous layer is less dense and weaker than cortical bone, the suture anchor 10 may begin to turn or rotate within the bore in response to force exerted by the tip 52 of the insertion tool 50 returning to its original shape due to the effect of the shape memory material from which it is comprised. As the rotation of the suture anchor 10 occurs, the leading gripping edge 16 is forced into the cancellous layer forming this portion of the wall of the bore.
- the arcuate portion 20a is urged against the wall of the of the bore, wherein engagement with the wall proceeds along the arcuate portion 20a to the linear portion 20b and then to the trailing surface 22 as the suture anchor 10 rotates.
- the suture anchor 10 generally begins to rotate about the point where the leading gripping edge 16 engages the wall of the bore.
- the rotation of the suture anchor 10 may continue until the tip 52 of the insertion tool 50 has returned to its original shape such that the insertion tool 50 rests against the wall at the entrance to the bore
- the suture anchor 10 has been illustrated in this method of implantation as interacting with a bone structure having a cancellous layer underlying a cortical layer, such as that found, for example, in the "rotator cuff' area of the human shoulder (also known as the greater tuberosity of the humorous)
- a suture anchor 10 according to embodiments of the present invention may also be used in areas of dense bone, predominantly comprised of a cortical layer with little or no underlying cancellous layer, such as, for example, at the "cup" or glenoid area of the shoulder
- the suture anchor 10 according to embodiments of the present invention may tend not to rotate as freely or extensively within a cortical bone layer as within a cancellous layer, it contains features further described herein which render the suture anchor 10 generally adapted for application to both dense cortical bone and
- further rotation of the suture anchor 10 may be obtained by exerting axial force on the suture 30 outwardly with respect to the bore and/or urging the insertion tool 50 to the diametrically opposite side of the bore
- the forces exerted through the suture 30 and/or the insertion tool 50 causes the leading gripping edge 16 to bite or penetrate further into the wall of the bore and the suture anchor 10 to rotate thereabout
- the trailing gripping edge 24 begins to penetrate into the wall of the bore FIG.
- FIG. 13 shows that rotation of the suture anchor 10 due to the force exerted on the suture 30 and/or the insertion tool 50 further brings the insertion tool 50 into contact with the wall on generally the opposite side of the bore from which the insertion tool 50 initially entered the bore At this point, the insertion tool 50 is removed from the inserter bore 26 of the suture anchor 10 by a tensile force applied outwardly with respect to the inserter bore 26
- the suture anchor 10 preferably may have rotated up to about ninety degrees from the orientation in which it was inserted into the bore As shown in FIG. 14, once the insertion tool 50 is removed, further tensile force may be exerted on the suture 30 to complete the rotation of the suture anchor 10 within the bore to a seated position In a seated position, the suture anchor 10 preferably may have rotated up to about ninety degrees from the orientation in which it was inserted into the bore As shown in FIG.
- the suture anchor 10 in a seated position will preferably be disposed such that the bore-abutting surface 14 is substantially perpendicular to the axis of the bore Both the leading gripping edge 16 and the trailing gripping edge 24 will have penetrated into the wall of the bore Further, the divergence of the leading surface 18 from the trailing surface 22, as both approach the bore-abutting surface 14, increases the surface area of the suture anchor 10 engaging the bone in a seated position
- the suture anchor 10 provides a large surface area over which a force exerted outwardly with respect to the bore can be distributed
- the size and configuration of the suture anchor 10 may be varied to provide an optimally effective surface area for the particular bone structure in which the suture anchor 10 is to be implanted This feature is particularly advantageous where the cortical bone layer is relatively thin and does not significantly contribute to the strength of the bone A suture anchor 10 having a large effective surface
- the suture anchor 10 may be slightly smaller than the diameter of the bore.
- a tensile force applied to the suture 30, or a force resulting from the insertion tool 50 being urged toward the opposite side of the bore causes rotation of the suture anchor 10 Since the bore is larger than the maximum width of the suture anchor 10, rotation of the suture anchor 10 within the bore is facilitated and the leading and trailing gripping edges 16 and 24 are better able to penetrate the wall of the bore to secure the suture anchor 10
- suture anchors 10 may be used in the pelvic region to provide attachment points for bladder suspension procedures, in the shoulder area for reattachment of the rotator cuff, or in the feet and/or knees to assist in reattaching tendons
- the suture anchor 10 is seated in the bore in the bone such that the anchoring force (the force required to extract a seated suture anchor 10 from the bore) approaches the tensile strength of the suture 30 threaded therethrough
- the suture anchor 10 and attached suture 30 may withstand a force of up to about 30 pounds without the suture anchor 10 pulling out of the bore or the suture 30 breaking
- a minimum amount of tools are required for applying the suture anchors 10 according to embodiments of the present invention As shown in FIGS.
- an advantageous aspect of the present invention may comprise a kit having at least one of a suture anchor 10, at least one of a corresponding boring bit 54, and at least one of a corresponding insertion tool 50, thus facilitating selection of an appropriate configuration of a suture anchor 10 for the particular bone structure in which it is to be implanted
- FIG. 18 A further advantageous aspect of the present invention is shown in FIG. 18 and comprises an alternate embodiment of the present invention While being similar to the embodiments previously described, the suture anchor 10 shown in FIG. 18 further includes a notch 60 angularly disposed in the bore-abutting surface 14 and extending into the body 12, wherein the location of the notch 60 along the bore-abutting surface 14 may vary
- the suture anchor 10 also includes a suture 330 configured in the form of a loop
- a knotless suture anchor 10 is provided That is, the suture 330 may be wrapped about or otherwise engaged with the bodily tissue to be secured by the suture anchor 10 before it is wrapped about the suture anchor 10 to engage the notch 60
- the suture anchor 10 may be implanted into a bore in an adjacent bone according to the method previously described
- the suture 330 is preferably not required to be further knotted since the bodily tissue is already secured to the adjacent bone
- embodiments of the present invention is preferably not required to be further knotted since the bodily tissue is
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69942283T DE69942283D1 (en) | 1999-03-02 | 1999-12-15 | suture anchor |
AT99964275T ATE464844T1 (en) | 1999-03-02 | 1999-12-15 | SEWING THREAD ANCHOR |
AU20551/00A AU764885B2 (en) | 1999-03-02 | 1999-12-15 | Suture anchor and associated method of implantation |
EP99964275A EP1156743B1 (en) | 1999-03-02 | 1999-12-15 | Suture anchor |
JP2000601972A JP4106190B2 (en) | 1999-03-02 | 1999-12-15 | Sewing clasp |
CA002362952A CA2362952C (en) | 1999-03-02 | 1999-12-15 | Suture anchor and associated method of implantation |
AU2003204846A AU2003204846B2 (en) | 1999-03-02 | 2003-06-23 | Suture Anchor and Associated Method of Implantation |
AU2003204842A AU2003204842B2 (en) | 1999-03-02 | 2003-06-23 | Suture Anchor and Associated Method of Implantation |
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- 1999-12-15 CA CA002362952A patent/CA2362952C/en not_active Expired - Lifetime
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1199036A2 (en) * | 2000-10-18 | 2002-04-24 | Ethicon, Inc. | Knotless suture anchor system and method of use |
EP1199036A3 (en) * | 2000-10-18 | 2003-12-03 | Ethicon, Inc. | Knotless suture anchor system and method of use |
US7381213B2 (en) | 2000-10-18 | 2008-06-03 | Depuy Mitek, Inc. | Knotless bioabsorbable suture anchor system and method |
EP1297788A2 (en) * | 2001-09-28 | 2003-04-02 | Ethicon, Inc. | Absorbable bone anchor |
EP1297788A3 (en) * | 2001-09-28 | 2004-02-18 | Ethicon, Inc. | Absorbable bone anchor |
US6773436B2 (en) | 2001-09-28 | 2004-08-10 | Depuy Mitek, Inc. | Absorbable bone anchor |
AU2002301198B2 (en) * | 2001-09-28 | 2007-08-09 | Depuy Mitek, Inc. | Absorbable bone anchor |
US7875064B2 (en) | 2001-09-28 | 2011-01-25 | Ethicon, Inc. | Absorbable bone anchor |
US8449584B2 (en) | 2001-09-28 | 2013-05-28 | Depuy Mitek, Llc | Absorbable bone anchor |
EP1690499A2 (en) * | 2005-02-10 | 2006-08-16 | Inion Oy | Apparatus for attaching sutures |
EP1690499A3 (en) * | 2005-02-10 | 2006-10-25 | Inion Oy | Apparatus for attaching sutures |
Also Published As
Publication number | Publication date |
---|---|
EP1862127B1 (en) | 2009-11-04 |
AU764885B2 (en) | 2003-09-04 |
JP2011078816A (en) | 2011-04-21 |
ATE464844T1 (en) | 2010-05-15 |
EP1156743B1 (en) | 2010-04-21 |
DE69941632D1 (en) | 2009-12-17 |
JP2002537886A (en) | 2002-11-12 |
US6306158B1 (en) | 2001-10-23 |
EP1862127A1 (en) | 2007-12-05 |
JP4106190B2 (en) | 2008-06-25 |
EP1156743A1 (en) | 2001-11-28 |
JP4677433B2 (en) | 2011-04-27 |
US20020004669A1 (en) | 2002-01-10 |
CA2362952A1 (en) | 2000-09-08 |
CA2362952C (en) | 2007-06-26 |
JP2008068104A (en) | 2008-03-27 |
US20020004668A1 (en) | 2002-01-10 |
AU2055100A (en) | 2000-09-21 |
DE69942283D1 (en) | 2010-06-02 |
ATE447367T1 (en) | 2009-11-15 |
US6689154B2 (en) | 2004-02-10 |
CA2520411A1 (en) | 2000-09-08 |
US6635074B2 (en) | 2003-10-21 |
CA2520411C (en) | 2008-09-02 |
US20020007196A1 (en) | 2002-01-17 |
EP1862126A1 (en) | 2007-12-05 |
US6682549B2 (en) | 2004-01-27 |
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