US20030105524A1 - Securing connective tissue to a bone surface - Google Patents
Securing connective tissue to a bone surface Download PDFInfo
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- US20030105524A1 US20030105524A1 US10/340,979 US34097903A US2003105524A1 US 20030105524 A1 US20030105524 A1 US 20030105524A1 US 34097903 A US34097903 A US 34097903A US 2003105524 A1 US2003105524 A1 US 2003105524A1
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- Prior art keywords
- securing
- bone
- connective tissue
- anchoring device
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
- A61F2002/0817—Structure of the anchor
- A61F2002/0823—Modular anchors comprising a plurality of separate parts
- A61F2002/0835—Modular anchors comprising a plurality of separate parts with deformation of anchor parts, e.g. expansion of dowel by set screw
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
- A61F2002/0847—Mode of fixation of anchor to tendon or ligament
- A61F2002/0858—Fixation of tendon or ligament between anchor and bone, e.g. interference screws, wedges
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/08—Muscles; Tendons; Ligaments
- A61F2/0811—Fixation devices for tendons or ligaments
- A61F2002/0876—Position of anchor in respect to the bone
- A61F2002/0882—Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone
Definitions
- a ligament anchoring device is generally used to connect one end of a ligament to the exterior of the bone mass.
- the anchoring means generally requires that the replacement ligament end or ends be advanced beyond the bone tunnel, with each ligament end being bent and secured onto the exterior surface of the bone.
Abstract
Systems and methods for replacing, reconstructing and/or securing synthetic or biological connective tissue to interior and/or exterior bone surfaces. An anchoring apparatus and method of use are disclosed that secure a tendon or ligament within an interior opening of a bone structure. The apparatus comprises a securing device, a retention device, and an anchoring device. The securing device has an elongated body with an outer surface and an inner surface wherein the tendon or ligament fits between the interior of the open bone structure and the outer surface of the securing device. The retention device has an elongated body and a retention head, wherein the retention device securely fits within the interior surface of the securing device. The anchoring or holding device connects to the retention head of the retention device and extends outside the interior opening of the bone structure to engage the outer surface of the bone structure to hold the retention device and securing device in a fixed position inside the bone structure.
Description
- 1. Related Applications
- This application claims priority to U.S. patent application Ser. No. 09/655,703 filed Sep. 6, 2000, entitled METHOD AND APPARATUS FOR SECURING A SOFT TISSUE GRAFT TO BONE DURING AN ACL RECONSTRUCTION.
- 2. Field of the Invention
- The present invention relates to orthopedic surgical devices and procedures. More particularly, the present invention relates to systems and methods for replacing, reconstructing and/or securing synthetic or biological connective tissue to interior and/or exterior bone surfaces. Moreover, at least some implementations of the present invention relate to attaching and maintaining a replacement anterior cruciate ligament (ACL) or a posterior cruciate ligament (PCL) against a bone.
- 3. Background and Related Art
- The knee joint is one of the strongest joints in the body because of the powerful ligaments that bind the femur and tibia together. Although the knee is vulnerable to injury as a result of the incongruence and proximity of its articular surfaces, the knee joint provides impressive stability due to the arrangement and interacting strength of its ligaments, muscles and tendons.
- To a layman, the operation of the human knee resembles the actions of a hinge joint. In reality, however, the knee joint provides complicated mechanical movements and maneuverability far more complex than a simple hinge mechanism in regards to the rotation and gliding motions that may occur at the joint. In addition, the motions of flexing and extending the knee (and, in certain positions, the slight rotation inward and outward of the knee) require a very detailed structural configuration to facilitate the associated, refined mechanical movements of the knee joint.
- Structurally, the knee joint comprises two discs of protective cartilage called menisci, which partially cover the surfaces of the femur and the tibia. The menisci operate to reduce the friction and impact loading between the femur and the tibia during movement of the knee. The knee is also partly surrounded by a fibrous capsule lined with a synovial membrane, which secrets a lubricating fluid. Strong ligaments on each side of the knee joint provide support to the joint and limit the side-to-side motion and joint opening of the knee. Fluid filled sacs called bursas are located above and below the patella (kneecap) and behind the knee providing a means of cushioning the kneecap upon impact and helping with joint lubrication. Moreover, the quadriceps muscles run along the front of the thigh to straighten the knee, while the hamstring muscles run along the back of the thigh to bend the knee.
- Two intra-articular ligaments of considerable strength, situated in the middle of the joint, are known as the cruciate ligaments. These ligaments are referred to as “cruciate ligaments” because they cross each other somewhat like the lines of the letter “X”. The anterior and posterior cruciate ligaments receive their names in respect to the positioning of their attachment to the tibia. The primary function of the anterior cruciate ligament (ACL) is to provide a means for limiting hyperextension of the knee and preventing the backward sliding of the femur on the tibia plateau. The ACL also assists in limiting any medial rotation of the knee joint when the foot is solidly on the ground and the leg fixed in position. Conversely, the posterior cruciate ligament (PCL) primarily provides a means for preventing hyperflexion of the knee and preventing the femur from sliding forward on the superior tibial surface when the knee is flexed.
- Although the structure of the knee provides one of the strongest joints of the body, the knee is usually one of the most frequently injured joints. Athletes and persons who perform tasks requiring a great deal of body rotation are the most susceptible to serious ligament stressing and tearing at the knee joint. Consequently, the growing number of ligament injuries has given rise to considerable innovative activity within the area of orthopedic medicine in an effort to create surgical procedures and devices for replacing and reconstructing torn or dislocated ligaments.
- Typically the surgical procedures for ligament replacement and reconstruction involve tissues being grafted from one part of the body (autograft) to the original attachment sites of a torn or dislocated ligament. Once the ligament graft has been transplanted, it is then attached to the natural fixation sites of damaged ligament. For example, the replacement of the ACL may involve transplanting a portion of the patellar tendon to the attachment sites of the original ACL to assist in the reconstruction of the ACL in the knee joint.
- The expectations of prior art orthopedic procedures typically relate to reconstructing or replacing natural ligaments so as to enable the recipient to return to his or her full range of activity in as short a period of time as possible. To that end, medical researchers have attempted to duplicate the relative parameters of strength, flexibility, and recovery found in natural ligaments of the body. Unfortunately, many of the prior art methods of reconstructing and replacing damaged ligaments have generally proven inadequate for immediately restoring full strength and stability to the involved joint. Furthermore, there has long been a problem of effectively fastening a ligament to a bone surface for the duration of a ligament's healing process, which process involves the ligament graft growing to an adjoining bone mass to restore mobility to the injured joint of an orthopedic patient.
- Early ligament replacement procedures traditionally comprised extensive incisions and openings in the knee to attach a replacement ligament to bone surfaces at the fixation sites of the natural ligament. The ends of a grafted ligament were typically secured to exterior bone surfaces by driving stainless steel staples through or across the ligament and into the adjacent bone mass. The legs of the staples are generally adapted for piercing and penetrating tissue and bone mass, while maintaining a ligament at a specified connection site. Other various types of tissue fastening devices, such as channel clamps, were also designed by those skilled in the art. The channel clamps normally differed from the above-mentioned staple arrangement in that the channel clamp fixation devices comprise a plurality of components that do not require clinching in the conventional manner, as when setting a staple into a bone surface.
- The use of stainless steel staples, however, and other related fixation devices have a number of disadvantages. For example, piercing and puncturing of the ligament by the legs of the staples or other fixation devices may result in serious damage to the cross-fibers of the ligament or tissue. Such damage may cause weakening in the tensile strength of the ligament and result in tearing along the cross-fibers of the ligament under normal physical stress. When puncturing or tearing of cross-fibers occurs, the time required for the ligament to heal increases, which in turn results in a significant extension in the amount of time required to rehabilitate the knee joint before allowing the patient to return to normal daily activities.
- To reduce or eliminate the disadvantages of cross-fiber damage exhibited by staples and other related fixation devices that puncture the body of the ligament, improvements in the types of surgical devices and techniques were developed by those skilled in the art. For example, one such technique involves drilling a hole through a bone to form a channel wherein an anchoring device may be inserted with a ligament graft attached thereto. Typically, the ligament is maintained at a fixation site in the bone channel by passing a suture through one end of the ligament graft and thereafter attaching the other end of the suture to an anchoring device positioned at the face of the opening of the channel in the bone mass. Unfortunately, problems occur when trying to secure the threads of the suture to the anchoring device when a physician is working in restricted or confined areas. As a result, combination drilling devices operably coupled to suture anchors were designed for dealing with ligament placement problems in areas of restricted maneuverability.
- After a period of time, significant disadvantages emerged wherein a number of the ligament grafts retained in bone mass by the combination drilling/anchor devices began to rupture and tear at their fixation sites around the area where the ligament was in direct contact with the sharp outer edges of the opening of the channel formed in the bone. For example, as replacement ligaments tolerate the stress and strain associated with normal physical activity, the ligament generally begins to fatigue when wearing against the sharp outer edges of a bone channel opening. This form of fatigue typically causes significant damage to the ligament by tearing or cutting into ligament cross-fibers, thus, weakening the connection of the replacement ligament at its reattachment site. Consequently, after a period of time, cross-fiber fatigue, commonly known as “sun-dial” or “windshield wiper” wear, may further result in dislocating the replacement ligament from its original fixation site.
- Because of the significant disadvantages associated with “sun-dial” wear or fatigue on replacement ligaments, improved surgical procedures were developed offering arthroscopic-assisted techniques typically including the formation of passages or tunnels through bone mass, wherein natural or synthetic ligaments may be inserted. After the ligament graft has been inserted into the bone tunnel, a ligament anchoring device is generally used to connect one end of a ligament to the exterior of the bone mass. The anchoring means generally requires that the replacement ligament end or ends be advanced beyond the bone tunnel, with each ligament end being bent and secured onto the exterior surface of the bone. Nevertheless, unfavorable disadvantages of ligament bending was observed by those skilled in the art as typically resulting in a force concentration at the location of the ligament bend generally causing the cross-fibers of the ligament to weaken, potentially subjecting the ligament to the possibility of further tearing or rupturing, as in the case of ligament sundial wear. Additionally, exterior devices can rub and cause pain, requiring removal about 10% of the time.
- In response to the problems associated with maintaining a replacement ligament graft at a fixation site, additional devices and techniques were developed offering means whereby a ligament may be retained within a bone tunnel by an endosteal fixation device, such as, for example, an interference screw. The threads of the interference screw are typically bored into the bone tunnel for recessed engagement with the attached bone and one end of the ligament graft, while maintaining the ligament at a fixation site within the bone tunnel. Unfortunately, puncturing, piercing and possible tearing generally results to the cross-fibers of the ligament when the ligament is in direct engagement with the sharp threads of the interference screw. In addition, the interference screw typically requires a ligament replacement graft to be attached to its original bone.
- During flexion or extension of the ligament, tension loads tend to act against the fixation site of the ligament generally causing strain on the ligament against its fixation site. Under such strain, the facing of the threads of the interference screw generally effect a pinching or piercing of the ligament which may cause tearing or dislocation of the replacement ligament under the stress associated with normal physical activities. Consequently, when a grafted ligament suffers cross-fiber damage due to puncturing, piercing or tearing, the healing period for the ligament dramatically increases, thereby in effect, increasing the rehabilitation time for the patient to recover.
- One of the preferred methods employed by a number of skilled physicians when repairing torn or dislocated ligaments involves the harvesting of an autograft patella tendon bone block for incorporation into a femoral socket. Although the use of a patella tendon bone block provides a number of advantages, especially when dealing with fixation of the replacement ligament, the harvesting of a patella bone block typically results in extensive morbidity to the knee joint, requiring a considerable amount of time for the knee joint to heal, before a patient can resume any normal physical activity.
- As illustrated by the foregoing summary, efforts are continuously being made to improve the graft types, surgical methods and devices used in replacing and reconstructing torn or dislocated ligaments so as to make the process more efficient and effective. Unfortunately, significant disadvantages remain with all the presently known devices and methods offered by the prior art. Accordingly, it would be an advancement in the art to augment or even replace current techniques with other techniques.
- The present invention relates to orthopedic surgical devices and procedures. More particularly, the present invention relates to systems and methods for replacing, reconstructing and/or securing synthetic or biological connective tissue to interior and/or exterior bone surfaces. Moreover, at least some implementations of the present invention relate to attaching and maintaining a replacement anterior cruciate ligament (ACL) or a posterior cruciate ligament (PCL) against a bone.
- At least one embodiment of the present invention embraces an anchoring apparatus that secures a tendon or ligament within an interior opening of a bone structure. The apparatus comprises a securing device, a retention device, and an anchoring device. The securing device has an elongated body with an outer surface and an inner surface wherein the tendon or ligament fits between the interior of the open bone structure and the outer surface of the securing device. The retention device has an elongated body and a retention head, wherein the retention device securely fits within the interior surface of the securing device. The anchoring or holding device connects to the retention head of the retention device and extends outside the interior opening of the bone structure to engage the outer surface of the bone structure to hold the retention device and securing device in a fixed position inside the bone structure.
- The retention head of the retention device has a generally round shape with a flat side surface. The holding device is a washer like structure that has at least one retention spike to engage the bone structure and the retention device fits through an opening of the washer and the retention head fits against the inner perimeter of the holding device. The retention head acts as a ball joint and the holding device pivotally connects in a joint configuration. In an alternative embodiment, the holding device pivotally connects to the retention head via a pivot pin. Both the securing device and the retention device have threads or ridges on their outer surface. Further, the holding device includes a plurality of apertures that retain means for securing the tendon or ligament to the anchoring apparatus.
- In yet another alternative embodiment, the holding device has a first portion that extends beyond the span of the interior opening to engage the outer surface of the bone structure and a wedge section, which friction fits within the interior opening of the bone structure. In this embodiment, the holding or anchoring device has a taper shape.
- A method is furthered disclosed for anchoring or securing a tendon or ligament to a bone structure. The method has the steps of preparing a bone tunnel through the bone structure, preparing a soft tissue graft to attach to the tendon or ligament, grafting the soft tissue graft to the tendon or ligament, inserting the soft tissue graft within the bone tunnel, inserting a securing device within the bone tunnel with the graft between the securing device and an interior surface of the bone tunnel, and inserting a retention device within the securing device such that an anchoring device connected to a head of the retention device presses against an outside cortex of the bone tunnel.
- Further, the graft insertion step further comprises extending a portion of the soft tissue graft outside the bone tunnel and the retention device insertion step further comprises pressing the extended portion of soft tissue graft between the outside cortex of the bone tunnel and the anchoring device. The method can also include a step for coupling the tendon or ligament to the anchoring device, wherein the coupling step is performed by suturing the tendon or ligament to the anchoring device. Additionally, the method can include a step for placing the anchoring device within the tunnel such that it lays substantially flush with the outside cortex of the bone tunnel. In such an arrangement, the method causes spikes to embed in the outside cortex of the bone tunnel.
- The foregoing and other objects and features of the present invention will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only typical embodiments of the invention and are, therefore, not to be considered limiting of its scope, the invention will be described with additional specificity and detail through use of accompanying drawings in which:
- FIG. 1 is a perspective view illustrating one embodiment of the endosteal anchoring device of the present invention;
- FIG. 2 is a perspective view illustrating a second implementation of the endosteal anchoring device of the present invention;
- FIG. 3 is a side view of the securing device as shown in FIG. 1 in accordance with the present invention;
- FIG. 4A is a side view of the retention device as shown in FIG. 1 in accordance with the present invention;
- FIG. 4B is a side view of the retention device as shown in FIG. 1 in accordance with the present invention;
- FIG. 5 is a cut-away side view of the anchoring device as shown in FIG. 1 in accordance with the present invention;
- FIG. 6 is a top plan view of the anchoring device as shown in FIG. 5 in accordance with the present invention;
- FIG. 7 is perspective view illustrating a second embodiment of the anchoring device in accordance with the present invention; and
- FIG. 8 illustrates a side view of a third embodiment of the anchoring device in accordance with the present invention.
- The present invention relates to orthopedic surgical devices and procedures. More particularly, the present invention relates to systems and methods for replacing, reconstructing and/or securing synthetic or biological connective tissue to interior and/or exterior bone surfaces. Moreover, at least some implementations of the present invention relate to attaching and maintaining a replacement anterior cruciate ligament (ACL) or a posterior cruciate ligament (PCL) against a bone.
- Those skilled in the art will appreciate that the components of the present invention, as generally described and illustrated herein, can be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description as represented in FIGS. 1 through 8 is not intended to limit the scope of the invention, as claimed, but it is merely representative of the presently preferred embodiments of the invention.
- The specific embodiments of the invention will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. When reconstructing or replacing a torn or dislocated ligament, care should be taken to provide a means for connecting a ligament to its predetermined connection site and maintaining it firmly thereto. Generally, surgical procedures involve either the use of natural biological tissue grafts or prosthetic ligaments, simulated to mimic the parameters of strength, flexibility and positioning of the natural ligament it replaces.
- As shown in FIG. 1, to accommodate a ligament graft to a fixation site, the present invention offers a device for urging a
ligament 14 against the peripheral surface of atunnel 12 formed within abone 10, by implementing an endoscopic technique designed primarily for use with arthroscopic assistance. When reconstructing or replacing a torn or dislocated ligament, particularly the anterior cruciate ligament (ACL) of the knee, abone tunnel 12 is generally formed in the femur and/or tibia for positioning the natural orsynthetic ligament graft 14 therein.Tunnel 12 extends from a first opening to a second opening on the opposite side ofbone 10. - One specific method provided by the present invention for replacing or reconstructing dislocated ligaments utilizes an
endosteal anchoring member 16, formed of plastic, bone, stainless steel or any other suitable material. Theendosteal anchoring member 16 consists of aretention device 18, an anchoring or holdingdevice 20, and arigid securing body 22. Securingbody 22, also shown in detail alone in FIG. 3, has ridges orscrew threads 24 about its outer circumference and anopening 26, which extends nearly to the opposite end ofbody 22. The endosteal anchoring device is manufactured from a material suitable for sterilization and human implantation, and comprised of either a permanent non-biodegradable material or a biodegradable material capable of being absorbed by the body while maintaining the essential rigid qualities required to accommodate its anchoring functions. Further, these materials can be impregnated or coated with healing enhancing substances, such as Bone Morphogenic Protein (BMP) or Calcium Phosphate (CaPo4). - In this embodiment, the
ligament graft 14 extends throughtunnel 12 to the outer surface ofbone 10. Thread or string can be used to attach to one end ofligament 14 to draw it intotunnel 12. Other methods of insertingligament 14 withintunnel 12 are readily apparent to those skilled in the art. Thegraft 14 then is pressed against the outer surface to graft withbone 10 for recovery and to anchor the graft physically for long-term support. It is intended thatligament graft 14 is held in place against the outer bone surface by anchoringmember 16. To accomplish this, anchoringmember 16 utilizesretention device 18 and anchoringdevice 20.Retention device 18, which is also shown in greater detail in FIG. 4A, fits within opening 26 of securingbody 22 afterbody 22 is placed withintunnel 12.Retention device 18 also has ridges or screws 25 on its outer surface to engage with the interior of securingbody 22 in a fixed arrangement, as shown in FIG. 4B.Retention device 18 further includes a retaining orretention head 28, which is designed to be larger than the diameter of the length of securingbody 22.Retention device 18 mates to a holding or anchoringdevice 20, which has a given width sufficient thattunnel 12 can be wide enough to acceptretention device 18 and securingbody 22 and that is narrow enough to prevent anchoringdevice 20 from passing though the tunnel. - Anchoring
device 20, which is also shown in greater detail in FIG. 5, has anopening 27 and is generally washer-shaped. Along its outer perimeter is an outer lip or plurality of generally outwardly and downwardly projectingspikes 32 that are utilized to engage the bone surface ofbone 10 during the re-attachment procedure. Eachspike 32 penetratesligament 14 as well asbone 10 to secureligament 14 to the surface ofbone 10. Anchoringdevice 20 further includes a plurality ofopenings 32 through which sutures may pass to secure the ligament within the tunnel without requiring the ligament to extend outside the tunnel, which is shown in detail in FIG. 2. -
Retention device 18 and securingbody 22 may be formed either of plastic, bone, stainless steel or any other suitable material, but not necessarily the same material, and both comprise a substantially elongated body. Theendosteal anchoring device 16 is manufactured from a material suitable for sterilization and human implantation, and comprised of either a permanent non-biodegradable material or a biodegradable material capable of being absorbed by the body while maintaining the essential rigid qualities required to accommodate its anchoring functions. - Alternatively, through
tunnel 12 withinbone 10 can be wide enough that securingbody 22 does not actually apply any pressure toligaments 14 to hold them against the interior surface of the bone. Rather, securingbody 22 holds anchoring device in thesame position ligaments 14 without being pressure fitted withintunnel 12. - FIG. 2 illustrates the same perspective cross-sectional view of a re-attachment procedure involving the anchoring device of the present invention as shown in FIG. 1. In this embodiment, several lengths of surgical thread or
sutures 34 are connected to theligament 14 and looped throughopenings 36 in anchoringdevice 30.Ligament 14 is retained withintunnel 12 because anchoringdevice 30 engages the bone surface. Since the support is on the outer bone surface, rather than against the interior bone surface, a stronger connection and graft are made due the to the stronger structure of the bone exterior over the bone interior.Spikes 32 engage the bone surface to provide fixed support of theanchoring system 14. The interior edge of each ofopenings 36 is rounded or coated so as to have a relatively smooth or dull surface to prevent the openings from cutting throughsutures 34. - The
retention head 28 ofretention device 18 is not only generally rounded, but also includes a substantiallyflat surface 38 generally parallel with the length ofdevice 18.Flat surface 38 provides for a locking fit betweenhead 28 and anchoringdevice 20. Initially, anchoringdevice 20 floats in order to provide a self-aligning attachment to the bone surface. Next, once a suitable attachment angle has been found, theflat surface 38 locks with an inner surface along a cupped portion of anchoringdevice 20. This arrangement holds anchoringdevice 20 in place untilspikes 32 penetrate the bone surface for fixed support. - FIG. 3 illustrates a side plan view of securing
body 22 with its screw ridges orscrew threads 24 andopening 26.Retention device 18 inserts within opening 26 withridges 25 engaging the inner wall ofbody 22 to provide a friction or pressure fit therein. - An
alternative anchoring device 120 is shown in FIG. 6. Anchoringdevice 120 is generally tapered or conical-shaped and has an opening 130 extending through the body of the device from the top to the base, where a plurality ofspikes 132 are formed. The taper or conical shape ofdevice 120 acts as a seat that engages the tunnel opening of the bone so thatanchor 120 lodges within the bone opening without passing therethrough.Anchor 120 further includes a plurality of ridges 134 that provide additional friction or pressure fitting to the bone surface. - FIG. 7 illustrates a top plan view of either
anchor device 20 oranchor 120 as shown in FIG. 6. The anchor includesopening 30, as well as a plurality of retention orsuture openings 32 about the perimeter ofopening 30.Suture openings 36 allow for threads or other suitable suture type material to be threaded throughopenings 36 and attached to the ligament to be grafted into the bone structure as shown in either FIG. 1 or FIG. 2. - FIG. 8 illustrates yet another alternative view of the anchoring assembly. Rather than have discrete elements of the
retention device 18 and anchoringdevice 20, they may be integrated into a single retention and anchoring device 150, wherein ananchoring device 152 is pivotally pinned 154 to ahead portion 156 of device 150. Suture openings 158 can be placed withinhead portion 156 or in anchoringdevice 152 for securing a ligament to device 150, rather than with the spikes 160 on the outer perimeter ofhead portion 156. Device 150 then inserts into securingdevice 22 withintunnel 12 like that shown in either FIGS. 1 or 2. Another embodiment can include having the anchoring device mate to the head portion in ball and socket joint, which allows pivoting of the anchoring portion for self alignment and seating into the cortex of the bone. - Thus, embodiments of the present invention embrace orthopedic surgical devices and procedures. In particular, embodiments of the present invention relate to systems and methods for replacing, reconstructing and/or securing synthetic or biological connective tissue to interior and/or exterior bone surfaces. Moreover, at least some embodiments of the present invention relate to attaching and maintaining a replacement anterior cruciate ligament (ACL) or a posterior cruciate ligament (PCL) against a bone.
- While specific embodiments of the endosteal anchoring device have been shown and described herein, the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative, and not restrictive. The scope of the invention is, therefore, indicated by the appended claims, rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (20)
1. A method for securing a connective tissue to a bone surface, the method comprising the steps for:
preparing a bone tunnel through a bone structure;
grafting a soft tissue graft to the connective tissue;
inserting the soft tissue graft within the bone tunnel;
inserting a securing device within the bone tunnel with the graft between the securing device and an interior surface of the bone tunnel; and
inserting a retention device within the securing device such that an anchoring device connected to a head of the retention device presses against an outside cortex of the bone tunnel.
2. A method for securing a connective tissue to a bone surface as recited in claim 1 , wherein the connective tissue comprises one of:
(i) a tendon; and
(ii) a ligament.
3. A method for securing a connective tissue to a bone surface as recited in claim 2 , wherein the step for inserting the soft tissue graft further comprises a step for extending a portion of the soft tissue graft outside the bone tunnel.
4. A method for securing a connective tissue to a bone surface as recited in claim 3 , wherein the step for inserting a retention device further comprises a step for pressing the extended portion of soft tissue graft between the outside cortex of the bone tunnel and the anchoring device
5. A method for securing a connective tissue to a bone surface as recited in claim 2 , further comprising a step for coupling the connective tissue to the anchoring device.
6. A method for securing a connective tissue to a bone surface as recited in claim 5 , wherein the step for coupling the connective tissue comprises a step for suturing connective tissue to the anchoring device.
7. A method for securing a connective tissue to a bone surface as recited in claim 2 , further comprising a step for placing the anchoring device within the tunnel such that the anchoring device lays substantially flush with the outside cortex of the bone tunnel.
8. A method for securing a connective tissue to a bone surface as recited in claim 7 , wherein the step for placing the anchoring device includes a step for embedding one or more spikes in the outside cortex of the bone tunnel.
9. A method for securing a connective tissue to a bone surface as recited in claim 2 , wherein the anchoring device pivotally connects to the head of the retention device.
10. A method for securing a connective tissue to a bone surface as recited in claim 2 , further comprising a step for embedding a spike of the anchoring device within the outside cortex of the bone tunnel.
11. A method for securing a connective tissue to a bone surface, the method comprising the steps for:
preparing a bone tunnel through a bone structure;
grafting a soft tissue graft to the connective tissue;
inserting the soft tissue graft within the bone tunnel;
inserting a securing device within the bone tunnel with the graft between the securing device and an interior surface of the bone tunnel, wherein the securing device includes an elongated body with an outer surface and an inner channel, and wherein the securing device is configured for placement completely within the bone tunnel; and
inserting a retention device within the securing device such that an anchoring device connected to a head of the retention device presses against an outside cortex of the bone tunnel, wherein the retention device includes an elongated body and a retention head, wherein at least a portion of the elongated body extends down the inner channel of the securing device to cause a bias on the tendon or ligament in a direction toward the bone wall, wherein the retention head includes a rounded portion and a flat portion, and wherein the flat portion is parallel to the length of the elongated body.
12. A method for securing a connective tissue to a bone surface as recited in claim 11 , wherein the connective tissue comprises one of:
(i) a tendon; and
(ii) a ligament.
13. A method for securing a connective tissue to a bone surface as recited in claim 12 , wherein the step for inserting the soft tissue graft further comprises a step for extending a portion of the soft tissue graft outside the bone tunnel.
14. A method for securing a connective tissue to a bone surface as recited in claim 13 , wherein the step for inserting a retention device further comprises a step for pressing the extended portion of soft tissue graft between the outside cortex of the bone tunnel and the anchoring device.
15. A method for securing a connective tissue to a bone surface as recited in claim 12 , further comprising a step for coupling the connective tissue to the anchoring device.
16. A method for securing a connective tissue to a bone surface as recited in claim 15 , wherein the step for coupling the connective tissue comprises a step for suturing connective tissue to the anchoring device.
17. A method for securing a connective tissue to a bone surface as recited in claim 12 , further comprising steps for:
placing the anchoring device within the tunnel such that the anchoring device lays substantially flush with the outside cortex of the bone tunnel; and
connecting the anchoring device a holding device to the retention head by locking at least a portion of the anchoring device with a flat portion of the retention head, and wherein another portion of the anchoring device provides a bias in a direction that is transverse to the bias caused by the elongated body extending down the inner channel of the securing device.
18. A method for securing a connective tissue to a bone surface as recited in claim 17 , wherein the step for placing the anchoring device includes a step for embedding one or more spikes in the outside cortex of the bone tunnel.
19. A method for securing a connective tissue to a bone surface as recited in claim 12 , wherein the anchoring device pivotally connects to the head of the retention device
20. A method for securing a connective tissue to a bone surface as recited in claim 12 , further comprising a step for embedding a spike of the anchoring device within the outside cortex of the bone tunnel.
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US09/655,703 US6517579B1 (en) | 2000-09-06 | 2000-09-06 | Method and apparatus for securing a soft tissue graft to bone during an ACL reconstruction |
US10/340,979 US20030105524A1 (en) | 2000-09-06 | 2003-01-13 | Securing connective tissue to a bone surface |
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US09/655,703 Division US6517579B1 (en) | 2000-09-06 | 2000-09-06 | Method and apparatus for securing a soft tissue graft to bone during an ACL reconstruction |
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US10/340,979 Abandoned US20030105524A1 (en) | 2000-09-06 | 2003-01-13 | Securing connective tissue to a bone surface |
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US20050273003A1 (en) * | 2003-10-15 | 2005-12-08 | Arthrotek, Inc. | Method and apparatus for graft fixation |
US20110153018A1 (en) * | 2003-10-15 | 2011-06-23 | Biomet Sports Medicine, Llc | Method and Apparatus for Graft Fixation |
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US20090030516A1 (en) * | 2005-11-29 | 2009-01-29 | Pierre Imbert | Surgical Implant With Extracortical Support for a Ligament Transplant |
US8147546B2 (en) | 2007-03-13 | 2012-04-03 | Biomet Sports Medicine, Llc | Method and apparatus for graft fixation |
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US20100016892A1 (en) * | 2008-07-21 | 2010-01-21 | William Kaiser | Method and apparatus for securing soft tissue to bone |
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US20110106252A1 (en) * | 2009-04-17 | 2011-05-05 | Shane Barwood | Tenodesis system |
US8932354B2 (en) * | 2009-04-17 | 2015-01-13 | Shane Barwood | Tenodesis fixation method |
US20110106253A1 (en) * | 2009-04-17 | 2011-05-05 | Shane Barwood | Tenodesis fixation method |
US9468518B2 (en) | 2009-04-17 | 2016-10-18 | Lumaca Orthopaedics Pty Ltd | Tenodesis system |
US8845725B2 (en) * | 2009-04-17 | 2014-09-30 | Lumaca Orthopaedics Pty Ltd | Tenodesis system |
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US9271826B2 (en) * | 2009-04-28 | 2016-03-01 | Mathys Ag Bettlach | Implantable system having a dissolution mechanism upon recovery |
US8663325B2 (en) * | 2009-07-09 | 2014-03-04 | Smith & Nephew, Inc. | Tissue graft anchor assembly and instrumentation for use therewith |
US9333020B2 (en) | 2009-07-09 | 2016-05-10 | Smith & Nephew, Inc. | Tissue graft anchor assembly and instrumentation for use therewith |
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US20130204299A1 (en) * | 2010-10-22 | 2013-08-08 | Ncs Lab S.R.L. | Fixing device for suture threads to be inserted into a bone tissue |
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