US20210015601A1 - Soft tissue fixation device - Google Patents
Soft tissue fixation device Download PDFInfo
- Publication number
- US20210015601A1 US20210015601A1 US17/063,620 US202017063620A US2021015601A1 US 20210015601 A1 US20210015601 A1 US 20210015601A1 US 202017063620 A US202017063620 A US 202017063620A US 2021015601 A1 US2021015601 A1 US 2021015601A1
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- US
- United States
- Prior art keywords
- plate
- cable
- soft tissue
- attachment
- lateral
- 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
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Images
Classifications
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- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
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Definitions
- the present disclosure provides a time-saving soft tissue fixation device that enables a large, secure mechanical attachment, and allows the healing factors to reach the entire portion of the tendon that is in contact with the prosthesis, thereby maximizing the likelihood of achieving biological fixation of the tendon to the prosthesis.
- FIG. 7 is a side elevation view of the soft tissue attachment device in of FIG. 6 in combination with a proximal tibial component in accordance with another exemplary embodiment of the present invention
- FIG. 13 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention.
- FIG. 16 is a front perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention.
- Body 101 of device 100 includes anterior surface 150 , posterior surface 151 , and a depth between anterior surface 150 and posterior surface 151 .
- Anterior surface 150 and posterior surface 151 are in communication through porous section 110 .
- Posterior surface 151 is configured to contact and retain the patellar tendon against tibial component 200 . Retention is accomplished by a clamping force applied to the tendon between device 100 and tibial component 200 . However, applying excessive force to ensure retention can prevent blood flow to the tendon causing necrosis of the tendon, and therefore, preventing the desired biological fixation.
- posterior surface 151 may include a friction enhancing surface to increase mechanical retention under less clamping force.
- the friction enhancing surface may include a roughened surface, barbs, teeth, or any other structure suitable to aid retention.
- Porous section 210 can be created from standard geometric shapes such as dodecahedrons or octahedrons that are stacked to create a pore size between 500-700 microns and a porosity of 60-80%. This configuration can be ordered or randomized. The preferred pore size mentioned is optimized for allowing soft tissue to grow into the construct to provide viable long term biologic fixation. Additionally, the porosity and structure can be optimized for bone or hard tissue ingrowth for the tibia or other replacement joints. Porous section 210 may be manufactured separately from body 201 and then mechanically attached to body 201 using mechanical fasteners or by any other means known to those skilled in the art (not shown).
- body 201 and porous section 210 are a unitary structure, they may be made of titanium, stainless steel, tantalum, cobalt chrome, tungsten or any other biocompatible material or combination thereof suitable for human implantation having the structural strength to carry the loads required of a prosthetic knee.
- the cable retention device may be constructed of a rigid material and include a thru-hole.
- the thru-hole includes back-angled teeth that permit the cable retention device to travel along cable 500 from the leading end toward the trailing end, but prohibit movement from the trailing end toward the leading end.
- the retention device may have a set screw hole in communication with the thru-hole, thereby permitting the introduction of a set screw for the retention of the cable with respect to the cable retention device.
- a crimped component can be used to secure to cable 500 and prevent movement with the soft tissue attachment device by mating with opening 370 or 371 .
- Medial attachment opening 371 may be countersunk so that a trailing end of the cable retention device is flush with anterior surface 350 when installed.
- Screw threads 610 D are configured to cooperate with the threads of threaded opening 164 D such that clockwise rotation of screw 600 D causes screw 600 D to linearly advance through threaded opening 164 D, thereby causing screw head 622 D to contact tab 163 D. Continued rotation of screw 610 D will apply force to tab 163 which causes posterior surface 151 D to clamp down on the soft tissue.
- screw 600 D includes drive opening 620 D.
- Drive opening 620 D may be any suitable shape for receiving a rotational tool therein, for example, a Philips head, flat head, star key, alien key, etc.
- Device 100 G also includes medial attachment post 161 G extending from posterior surface 151 G, proximate medial end 141 G.
- Medial attachment post 161 G includes a rotatable shaft 280 G disposed inside.
- the distal end of rotatable shaft 280 G includes a rectangular protrusion 281 G.
- Rotation of rotatable shaft 280 G causes rectangular protrusion 281 G to engage one of corresponding slots 287 G located with the prosthesis.
- both medial attachment post 161 G and lateral attachment post 160 G may include the structure shown and described for either of the posts 160 G, 161 G.
- Cable 501 may be first inserted through one of the lateral attachment openings, wrapped around the posterior of proximal tibial component 200 , inserted posteriorly through medial attachment opening 871 , inserted anteriorly through medial attachment opening 873 , wrapped around the posterior surface of proximal tibial component 200 , and inserted posteriorly through the other lateral attachment opening.
- leading end and trailing end of cable 501 are located adjacent one another.
- the leading and trailing ends of cable 501 may be secured by tying them together using any type of knot sufficient for creating a permanent connection.
- the ends of cable 501 may be secured by a cable retention device (not shown) affixed to cable 501 adjacent to the lateral attachment openings.
- any disclosed embodiment may come preinstalled on a prosthesis and merely has enough space between the posterior surface of the device and the anterior surface of the prosthesis in order to pull the soft tissue between the two surfaces.
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Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 16/295,650, published as U.S. Patent Application Publication No. 2019/0201184, filed Mar. 7, 2019, which is a continuation of U.S. patent application Ser. No. 15/417,714, now U.S. Pat. No. 10,251,744, filed Jan. 27, 2017.
- The present disclosure relates to a device for the retention of soft tissue. More specifically, the present disclosure relates to a device for attaching soft tissue to a bone replacement device, such as to a proximal tibial implant.
- When replacing a joint in a patient, it is preferable to maintain connection of as much of the soft tissue as possible while replacing the articulation surfaces of the bones, thereby preserving the flexor and extensor mechanisms of the joint. However, preservation of the soft tissue connections is not always possible. This may occur, for example, in the case of oncological bone disease, revision surgery with significant bone loss, or a traumatic injury that requires resection and prosthetic reconstruction of the attachment points.
- Resection of the portion of the bone that includes the soft tissue attachment points leaves the surgeon with the dilemma of attaching the soft tissue to the prosthesis. Mechanical attachment of soft tissue to the prosthesis is often accomplished via sutures or a clamp. However, in order to achieve long term success, the ultimate goal is for there to be biological fixation of the soft tissue to the prosthesis.
- A technique currently utilized to achieve biological fixation of a patellar tendon to a proximal tibial implant is to first mechanically attach the tendon to the prosthesis with either sutures or a mechanical device such as a clamp, and then cover the reconstruction with a medial or lateral gastrocnemius flap over the top of the remnant of the patellar tendon and prosthesis. The gastrocnemius flap provides a soft tissue closure under the skin and also provides additional blood supply to the tendon. This additional blood supply can thereby promote tissue growth of the patellar tendon and biological fixation of the patellar tendon to a surface of the proximal tibial implant. Similar techniques are currently utilized to achieve biological fixation of tendons, or muscles, or other soft tissues to prostheses in other joints, such as the proximal femur and the shoulder. When performing these surgical techniques, the use of sutures to attach the tendon to the prosthesis has several downfalls. First, the sutures have minimal purchase in the tendon and can cause the tendon to tear at the points of contact, allowing the tendon to pull away from the prosthesis, making biological fixation difficult. Second, the process of attaching sutures is time consuming, and therefore, inefficient for the surgeon. Third, the construct is initially only as strong as the rupture strength of the suture. The use of a mechanical device such as a clamp to attach the tendon to the prosthesis alleviates these issues. However, presently available clamps, while providing a larger purchase area, also prevent the healing factors provided by the gastrocnemius flap from reaching the portions of the tendon under the clamps, thereby reducing the likelihood of biological fixation. The present disclosure provides a time-saving soft tissue fixation device that enables a large, secure mechanical attachment, and allows the healing factors to reach the entire portion of the tendon that is in contact with the prosthesis, thereby maximizing the likelihood of achieving biological fixation of the tendon to the prosthesis.
- The present disclosure provides devices and methods for fixation of soft tissue to prosthetic implants. The soft tissues may include, but are not limited to, ligaments, tendons, and/or muscles. The prosthetic implants may include prostheses for replacing all or a portion of any bone adjacent to a joint.
- According to one exemplary embodiment, the soft tissue fixation device includes a body with an anterior surface, a posterior surface, and a depth extending from the anterior surface to the posterior surface. The body also includes a distal end, a proximal end, and a height extending from the distal end to the proximal end, as well as a lateral end, a medial end, and a width extending from the lateral end to the medial end. The posterior surface of the soft tissue fixation device has a concave portion that generally matches a convex portion of an anterior surface of a prosthetic implant. The body of the soft tissue fixation device also includes a frame with a solid perimeter and a porous section disposed within the solid perimeter of the frame. The porous section extends through the depth of the body so the anterior surface is in communication with the posterior surface through the porous section. The porous section extends across a majority of the height and width of the body of the soft tissue fixation device.
- The soft tissue fixation device may be secured to the prosthetic implant using one of several securing structures. The securing structures may include medial and lateral attachment openings extending from the anterior surface to the posterior surface and a cable configured to first pass through one of the openings and a corresponding lateral or medial channel in the prosthetic implant extending from an anterior surface to a posterior surface of the prosthetic implant. The cable is configured to then be passed through the other channel and attachment opening. The trailing end of the cable includes a protrusion that is larger than the openings. The device also includes a crimp configured to be attached to the cable adjacent to the lateral or medial opening the cable exits, wherein the crimp is larger than the opening.
- The securing structures may also include medial and lateral attachment posts with flat surfaces for engagement with medial and lateral set screws. The attachment posts extend from the posterior surface proximate the medial and lateral ends. The medial and lateral attachment posts are configured to fit within medial and lateral attachment openings in the prosthetic implant. It should be noted that the device may be symmetrical, enabling the posts to be interchangeably utilized in either opening, or the device may be asymmetrical.
- Another exemplary embodiment discloses a tibial orthopedic implant including a proximal tibial component and a soft tissue attachment device. The proximal tibial component is configured to attach to and extend from a resected proximal tibia. The proximal tibial component includes a body having an anterior surface, a posterior surface, a medial side, a lateral side, a distal end, and a proximal end. The anterior surface includes a porous section configured to allow tissue ingrowth. The porous section has a convex curvature extending from proximate the medial side to proximate the lateral side. The body also includes a plurality of openings adjacent the porous section. The proximal tibial component also includes an articulation component configured to attach to the proximal end of the body and includes a bearing surface configured to bear against a distal femoral implant. The implant also includes a soft tissue attachment device that has an anterior surface, a posterior surface, and a depth extending from the anterior surface to the posterior surface. The soft tissue attachment device also has a distal end, a proximal end, and a height extending from the distal end to the proximal end, and a lateral end, a medial end, and a width extending from the lateral end to the medial end. The posterior surface of the soft tissue attachment device has a concave portion that generally matches the convex curvature of the porous section of the body of the proximal tibial component. The soft tissue attachment device further includes a frame with a solid perimeter and a porous section disposed within the solid perimeter. The porous section extends through the depth of the soft tissue attachment device so the anterior surface is in communication with the posterior surface through the porous section. Also, the porous section extends across a majority of the height and width of the soft tissue attachment device.
- These and other objects of the present invention will be apparent from review of the following specification and the accompanying drawings.
- The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to explain the objects, advantages, and principles of the invention.
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FIG. 1A is a perspective view of a soft tissue attachment device in accordance with an exemplary embodiment of the present invention; -
FIG. 1B is a perspective view of a soft tissue device in accordance with another exemplary embodiment of the present invention; -
FIG. 2 is a perspective view of the soft tissue attachment device inFIG. 1A in combination with a proximal tibial component in accordance with an exemplary embodiment of the present invention; -
FIG. 3 is an exploded perspective view of the embodiment ofFIG. 2 ; -
FIG. 4 is a front elevation view of the embodiment ofFIG. 2 ; -
FIG. 5 is a side elevation view of the embodiment ofFIG. 2 ; -
FIG. 6 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 7 is a side elevation view of the soft tissue attachment device in ofFIG. 6 in combination with a proximal tibial component in accordance with another exemplary embodiment of the present invention; -
FIG. 8 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 9 is a top plan view of the soft tissue attachment device ofFIG. 8 ; -
FIG. 10 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 11 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 12 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 13 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 14 is a top plan view of the soft tissue attachment device inFIG. 13 ; -
FIG. 15 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 16 is a front perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention; -
FIG. 17 is a rear perspective view of the soft tissue attachment device inFIG. 16 ; and -
FIG. 18 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention. -
FIG. 19 is a perspective view of a soft tissue attachment device in accordance with another exemplary embodiment of the present invention. - The detailed description of the invention, below, is described, and shown in the figures, for use with a proximal tibial component. However, it should be understood that the invention could be used for securing any soft tissue to any implant or joint replacement device in a patient.
- Referring to
FIGS. 1-5 , softtissue attachment device 100 is used to mechanically attach a patellar tendon of a patient toproximal tibial component 200 while allowing blood and other joint fluids to reach the mechanically attached tendon after the soft tissue attachment device is secured to encourage biological fixation of the tendon totibial component 200. Further, the clamp will allow for soft tissue fixation or ingrowth in a similar fashion to that of thetibial component 200.Device 100 includesbody 101 which includes two parts,frame 120 andporous section 110.Frame 120 andporous section 110 may be made of a single material, such as titanium, stainless steel, tantalum, cobalt-chrome, tungsten or any other biocompatible material, or compound material, such as for example titanium coated PEEK, suitable for human implantation. Ifporous section 110 andframe 120 are made of the same type of material, then it is preferred, although not necessary, that they are unitary for enhanced structural purposes. Alternatively,porous section 110 andframe 120 may be made of different materials.Porous section 110 may be made of any porous material that will readily permit the passage of bodily fluids or soft tissue therethrough, including ceramics, metals, polymers, and combinations thereof. Furthermore,porous section 110 may be formed oflattice 111 made of horizontally and vertically aligned strips, or strips in any other orientation, having wide or narrow spacing. Alternatively,lattice 111 may serve as a support structure for another porous material that covers and is attached tolattice 111. In this configuration, the horizontal and vertical strips are used more for structural support, as the porous section is optimized for soft tissue ingrowth. The porous structure can be created from standard geometric shapes such as dodecahedrons or octahedrons that are stacked to create a pore size between 500-700 microns and a porosity of 60-80%. This configuration can be ordered or randomized. The preferred pore size mentioned can be optimized for allowing soft tissue to grow into the construct to provide viable long term biologic fixation. Further, by having the porous structure on the clamp, the tissue can also infiltrate the clamp and the underlying prosthetic tibia. Additionally, the porosity and structure can be optimized for bone or hard tissue ingrowth for the tibia or other replacement joints. -
Body 101 ofdevice 100 includesanterior surface 150,posterior surface 151, and a depth betweenanterior surface 150 andposterior surface 151.Anterior surface 150 andposterior surface 151 are in communication throughporous section 110.Posterior surface 151 is configured to contact and retain the patellar tendon againsttibial component 200. Retention is accomplished by a clamping force applied to the tendon betweendevice 100 andtibial component 200. However, applying excessive force to ensure retention can prevent blood flow to the tendon causing necrosis of the tendon, and therefore, preventing the desired biological fixation. Accordingly,posterior surface 151 may include a friction enhancing surface to increase mechanical retention under less clamping force. The friction enhancing surface may include a roughened surface, barbs, teeth, or any other structure suitable to aid retention. -
Body 101 ofdevice 100 further includesdistal end 131,proximal end 130, and a height extending betweendistal end 131 andproximal end 130.Body 101 also includeslateral end 140,medial end 141, and a width extending betweenlateral end 140 andmedial end 141.Posterior surface 151 ofbody 101 may be, at least in part, concave along the width ofbody 101, andanterior surface 150 may be convex along the width ofbody 101. As will be appreciated, the use of the terms medial and lateral to describe the embodiments show in the figures describes an implant for the left knee of a patient. The use of these terms, as well as any other directional terms used throughout the specification and claims, which are well known to those skilled in the art, is merely for convenience, and the terms should be considered interchangeable in the context of relative special relationships and other parts of a human body. -
Device 100 may includelateral attachment post 160 extending fromposterior surface 151, proximatelateral end 140.Lateral attachment post 160 includesflat surface 170 along at least a portion of a length thereof for engagement withlateral set screw 270.Device 100 may further includemedial attachment post 161 extending fromposterior surface 151, proximatemedial end 141.Medial attachment post 161 includesflat surface 171 along at least a portion of a length thereof for engagement withlateral set screw 271. While affixingdevice 100 totibial component 200 using setscrews screws - Referring to
FIGS. 2-5 ,proximal tibial component 200 is configured to be attached to, and extend proximally from, a resected proximal tibia of a patient.Tibial component 200 includes abody 201 withanterior surface 250,posterior surface 251,lateral side 240,medial side 241,proximal end 230, anddistal end 231.Anterior surface 250 includes aporous section 210.Porous section 210 is generally in the desired location for the patellar tendon to achieve biological fixation.Porous section 210 is made of material that permits ingrowth of soft tissue.Porous section 210 can be created from standard geometric shapes such as dodecahedrons or octahedrons that are stacked to create a pore size between 500-700 microns and a porosity of 60-80%. This configuration can be ordered or randomized. The preferred pore size mentioned is optimized for allowing soft tissue to grow into the construct to provide viable long term biologic fixation. Additionally, the porosity and structure can be optimized for bone or hard tissue ingrowth for the tibia or other replacement joints.Porous section 210 may be manufactured separately frombody 201 and then mechanically attached tobody 201 using mechanical fasteners or by any other means known to those skilled in the art (not shown). Ifporous section 210 is manufactured separately frombody 201,porous section 210 may be made of a different material thanbody 201. When manufactured separately,porous section 210 may be made of any ceramics, metals, polymers, or combinations thereof having suitable porosity to permit tissue ingrowth and structural integrity to serve as the anchor point of the extensor mechanism of the leg. However, preferably, thesolid body 201 andporous section 210 are manufactured as a unitary structure utilizing three-dimensional printing technology, which is well known in the art. Ifbody 201 andporous section 210 are a unitary structure, they may be made of titanium, stainless steel, tantalum, cobalt chrome, tungsten or any other biocompatible material or combination thereof suitable for human implantation having the structural strength to carry the loads required of a prosthetic knee. -
Body 201 oftibial component 200 further includes lateral attachment opening 260 configured to receivelateral attachment post 160 therein. Lateral attachment opening 260 is in communication with threaded lateral set screw opening 272 to facilitate the engagement of lateral setscrew 270 withflat surface 170 onlateral attachment post 160.Body 201 also includes medial attachment opening 261 configured to receivemedial attachment post 161 therein.Medial attachment opening 261 is in communication with threaded medial set screw opening 273 to facilitate the engagement ofmedial set screw 271 withflat surface 171 onmedial attachment post 161.Body 201 may also include a second pair of lateral andmedial attachment openings set screw openings tissue attachment device 100. -
Body 201 may further include a plurality oflateral openings 280 and a plurality ofmedial openings 281 to facilitate attachment of soft tissue, such as either the patellar tendon or the gastrocnemius flap, via sutures totibial component 200. Alternatively,body 201 may include additional structure to permit the use of addition soft tissue attachment devices to retain the desired soft tissues, such as the gastrocnemius flap. -
Proximal tibial component 200 further includes an articulation component (not shown) configured to attach toproximal end 230. The articulation component includes a bearing surface configured to bear against a distal femur or a distal femoral implant (not shown). -
FIGS. 6-7 show softtissue attachment device 300.Device 300 is similar todevice 100 except for the apparatus used to attachdevice 300 toproximal tibial component 400. Similar todevice 100,device 300 includesbody 301 which has two parts,frame 320 andporous section 310.Body 301 ofdevice 300 includesanterior surface 350,posterior surface 351,distal end 331,proximal end 330,lateral end 340, andmedial end 341.Body 301 includes lateral attachment opening 370 which extends fromanterior surface 350 toposterior surface 351 and is located proximatelateral end 340.Body 301 also includes medial attachment opening 371 which extends fromanterior surface 350 toposterior surface 351 and is located proximatemedial end 341. It should be noted thatdevice 300 may include medial and lateral posts (not shown) similar to 170 and 171 ofdevice 100. The medial and lateral posts ofdevice 300 are utilized to properly align and stabilizedevice 300 relative to the prosthesis. In the embodiment including medial and lateral posts, the lateral andmedial openings - Attachment of
device 300 is facilitated bycable 500.Cable 500 may be made of a woven polymeric material or a monofilament wire.Cable 500 includesprotrusion 510 attached to a trailing end ofcable 500.Protrusion 510 may be spherical, cylindrical, or conical.Protrusion 510 has a larger maximum dimension than lateral attachment opening 370 so as to preventprotrusion 510 from passing throughopening 370. Lateral attachment opening 370 may be countersunk so that a trailing end ofprotrusion 510 is flush withanterior surface 350 when installed. A leading end ofcable 500 is secured by a cable retention device (not shown) affixed tocable 500 adjacent tomedial attachment opening 371. The cable retention device may be spherical, cylindrical, or conical shape. The cable retention device has a maximum dimension larger than medial attachment opening 371 so as to prevent the cable retention device from passing throughopening 371. The cable retention device may be a crimp which is constructed of a plastically deformable material, wherein the crimp is affixed tocable 500 by the application of sufficient pressure to permanently deform the crimp aroundcable 500. The deformable crimp may have a slot on a side to permit the crimp to slide laterally ontocable 500, or the crimp may have a central thru-hole permitting the crimp to be axially introduced on tocable 500 prior to deformation. Alternatively, the cable retention device may be constructed of a rigid material and include a thru-hole. The thru-hole includes back-angled teeth that permit the cable retention device to travel alongcable 500 from the leading end toward the trailing end, but prohibit movement from the trailing end toward the leading end. In yet a further alternative, the retention device may have a set screw hole in communication with the thru-hole, thereby permitting the introduction of a set screw for the retention of the cable with respect to the cable retention device. In yet a further alternative, a crimped component can be used to secure tocable 500 and prevent movement with the soft tissue attachment device by mating withopening Medial attachment opening 371 may be countersunk so that a trailing end of the cable retention device is flush withanterior surface 350 when installed. -
FIG. 7 showsproximal tibial component 400 withdevice 300 attached thereto.Proximal tibial component 400 is similar toproximal tibial component 200. However,tibial component 400 need not include set screw holes.Tibial component 400 includes a body 401 withanterior surface 450,posterior surface 451,lateral side 440, and a medial side (not shown).Anterior surface 450 includes aporous section 410. Body 401 oftibial component 400 further includeslateral attachment channel 460 which extends fromanterior surface 450 toposterior surface 451 proximatelateral side 440 and is configured to receivecable 500 therethrough. Body 401 oftibial component 400 also includes a medial attachment channel (not shown) which extends fromanterior surface 450 toposterior surface 451 proximate the medial side and is configured to receivecable 500 therethrough.Cable 500 is configured to be inserted first through lateral attachment opening 370 then through correspondinglateral attachment channel 460. After exitinglateral attachment channel 460,cable 500 is wrapped aroundposterior surface 451 and is passed through the medial attachment channel andmedial attachment opening 371. After the leading end ofcable 500 exits medial attachment opening 371, sufficient tension is applied tocable 500 to generate enough force betweendevice 300 andtibial component 400 to retain the patellar tendon. The correct cable tension is then maintained by affixing the cable retention device tocable 500. Alternatively, body 401 may include a groove (not shown) extending fromlateral attachment channel 460 to the medial attachment channel alongposterior surface 451. The groove should have a width and depth roughly equal to the diameter ofcable 500 so that when installed,cable 500 is flush withposterior surface 451. In another alternative,lateral attachment channel 460 does not exitposterior surface 451, and instead, curves around inside body 401 and connects to the medial attachment channel, thereby forming one continuous channel beginning and ending onanterior surface 450. In a further alternative,proximal tibial component 400 anddevice 300 may be configured to acceptmultiple cables 500 therethrough, including having the cables inserted from opposite directions. -
FIGS. 8-18 show various different structures that may be utilized to affix a soft tissue attachment device to a prosthesis. For clarity purposes, the prostheses are omitted from the figures. However, one of ordinary skill in the art would understand the corresponding structure required in the prostheses to accommodate the depicted structures. While not shown in the figures, it should be understood that the embodiments shown inFIGS. 8-18 may include a porous section. Also not shown in the figures is the tibial component. -
FIGS. 8 and 9 show softtissue attachment device 100A which includesbody 101A.Body 101A includesanterior surface 150A,posterior surface 151A,lateral end 140A, andmedial end 141A. Similar todevice 100,device 100A includeslateral attachment post 160A extending fromposterior surface 151A, proximatelateral end 140A. However, instead of including a flat surface for engagement with a lateral set screw, lateral attachment post 160A includesgear teeth 180 disposed on the medial side thereof.Device 100A also includesmedial attachment post 161A which includesgear teeth 181 disposed on the lateral side thereof.Gear teeth threads 610 ofworm screw 600.Worm screw 600 is preinstalled within a cylindrical chamber inside a prosthesis wherein the cylindrical chamber is in communication with attachment openings configured to receive medial and lateral attachment posts 160A and 161A.Worm screw 600 is rotated via torque applied by a tool (not shown) inserted indrive opening 620. Drive opening 620 may be any suitable shape for receiving a rotational tool therein, for example, a Philips head, flat head, star key, alien key, etc. Drive opening 620 is accessed through access opening 190 which extends fromanterior surface 150A toposterior surface 151A. The prosthesis includes a corresponding access opening configured to be coaxially aligned with access opening 190 when attachment posts 160A and 161A are inserted into the attachment openings in the prosthesis. -
FIG. 10 shows softtissue attachment device 100B which includesbody 101B.Body 101B includesanterior surface 150B,posterior surface 151B,lateral end 140B, andmedial end 141B. These surfaces can represent any of the same surfaces on the soft tissue attachment devices mentioned in this application.Projections 192 are designed to be located on the posterior surface of the soft tissue attachment device to facilitate holding the soft tissue in place while relying on other means to affix the device to the prosthesis. Eachprojection 192 includesbarb 193 angled back towardposterior surface 151B.Projections 192 are shorter than the thickness of the soft tissue. It should also be understood thatbarbs 193 should face away from the direction of pull of the soft tissue being attached. In an alternative embodiment, some or all ofprojections 192 could be made long enough to serve as the means of connectingdevice 100B to the prosthesis. In such a configuration, thelonger projections 192 are longer than the thickness of the soft tissue and are configured to pass through the soft tissue and into corresponding openings on the prosthesis.Barbs 193 are configured to deflect whileprojections 192 pass into the corresponding openings on the prosthesis. Afterbarbs 193 pass through the corresponding openings,barbs 193 assume their original configuration, preventing withdrawal of softtissue attachment device 100B from the prosthesis.Soft tissue device 100B and the prosthesis may include alignment markings on theanterior surfaces 150B thereof to facilitate alignment of the projections with the corresponding openings on the prosthesis. It may be advantageous to producedevices 100B including different lengths of projections to accommodate varying soft tissue thicknesses. -
FIG. 11 shows softtissue attachment device 100C which includesbody 101C.Body 101C includesanterior surface 150C,posterior surface 151C,lateral end 140C, andmedial end 141C.Device 100C includeslateral attachment strap 160C extending fromlateral end 140C andmedial attachment strap 161C extending frommedial end 141C.Medial attachment strap 160C includesgear teeth 180C disposed on an interior surface thereof.Gear teeth 180C are configured to engagethreads 610C ofworm screw 600C.Lateral attachment strap 141C includesgear teeth 181C disposed on an exterior surface thereof.Gear teeth 181C are configured to engagegear threads 610C ofworm screw 600C.Worm screw 600 is preinstalled within a chamber inside a prosthesis wherein the chamber is in communication with attachment openings configured to receive medial and lateral attachment straps 160C and 161C or it may be externally contained in a housing, the entire construct wraps around the prosthesis. -
FIG. 12 shows softtissue attachment device 100D which includesbody 101D.Body 101D includesanterior surface 150D,posterior surface 151D, lateral end 140D, andmedial end 141D.Device 100D includeslateral attachment strap 160D extending from lateral end 140D andmedial attachment strap 161D extending frommedial end 141D.Medial attachment strap 160D includestab 162D extending orthogonally therefrom.Tab 162D includes threadedopening 164D.Lateral attachment strap 141D includestab 163D extending orthogonally therefrom.Tab 163D includesnon-threaded opening 165D.Screw 600D is configured to be inserted through opening 165D into threadedopening 164D.Screw threads 610D are configured to cooperate with the threads of threadedopening 164D such that clockwise rotation ofscrew 600D causes screw 600D to linearly advance through threadedopening 164D, thereby causingscrew head 622D to contacttab 163D. Continued rotation ofscrew 610D will apply force to tab 163 which causesposterior surface 151D to clamp down on the soft tissue. Similar to theworm screw 600,screw 600D includesdrive opening 620D. Drive opening 620D may be any suitable shape for receiving a rotational tool therein, for example, a Philips head, flat head, star key, alien key, etc. Softtissue attachment device 100D may be preinstalled in a prosthesis such that attachment straps 140D, 141D and screw are contained within the prosthesis and drive opening is accessible through an opening in the prosthesis. Alternatively, the prosthesis may have a recess surrounding the prosthesis that permits the medial andlateral straps -
FIGS. 13 and 14 show softtissue attachment device 100E which includes body 101E. Body 101E includesanterior surface 150E,posterior surface 151E,lateral end 140E, andmedial end 141E. Similar todevice 100,device 100E includeslateral attachment post 160E extending fromposterior surface 151E. However, instead of including a flat surface for engagement with a lateral set screw, lateral attachment post 160E includes a plurality ofangled slots 180E extending therethrough.Device 100E also includesmedial attachment post 161E which includesangled slots 181E extending therethrough.Angled slots posts 273E therein.Post 273E is pushed into angledslot 181E by advancingscrew 271E. -
FIG. 15 shows softtissue attachment device 100F.Device 100F includesanterior surface 150F,posterior surface 151F,lateral end 140F,medial end 141F, lateral attachment opening 160F, and medial attachment opening 161F.Openings screws openings device 100F may include multiple threaded holes at varying angles to accommodate the introduction ofscrews -
FIGS. 16 and 17 show softtissue attachment device 100G which includesbody 101G.Body 101G includesanterior surface 150G,posterior surface 151G,lateral end 140G, andmedial end 141G. Similar todevice 100,device 100G includeslateral attachment post 160G extending fromposterior surface 151G, proximatelateral end 140G. However, instead of including a flat surface for engagement with a lateral set screw,lateral attachment post 160G is a partially threaded cylinder. Within the cylinder is ascrew 271G configured to engage a trailingedge 274G of awedge 273G. Advancement ofwedge 273G intobox 275G (also located withinlateral attachment post 160G) causes stops 276G to protrude from openings on the top and bottom oflateral attachment post 160G (not shown) and into correspondingslots 277G in the prosthesis, thereby securing thedevice 100G to the prosthesis.Device 100G also includesmedial attachment post 161G extending fromposterior surface 151G, proximatemedial end 141G.Medial attachment post 161G includes arotatable shaft 280G disposed inside. The distal end ofrotatable shaft 280G includes arectangular protrusion 281G. Rotation ofrotatable shaft 280G causesrectangular protrusion 281G to engage one of corresponding slots 287G located with the prosthesis. It should be noted that bothmedial attachment post 161G andlateral attachment post 160G may include the structure shown and described for either of theposts -
FIG. 18 shows softtissue attachment device 700.Device 700 is similar todevice 100 save for the apparatus used to attachdevice 700 to a prosthesis. Similar todevice 100,device 700 includesbody 701 which has two parts,frame 720 andporous section 710.Body 701 ofdevice 700 includesanterior surface 750,posterior surface 751,lateral end 740, andmedial end 741.Body 701 includeslateral attachment post 770 which extends fromposterior surface 751 and is located proximatelateral end 740.Lateral attachment post 760 includes a plurality ofteeth 770 extending therefrom.Body 701 also includesmedial attachment post 761 which extends fromposterior surface 751 and is located proximatemedial end 741.Medial attachment post 761 includes a plurality ofteeth 771 extending therefrom.Teeth teeth teeth -
FIG. 19 show softtissue attachment device 800.Device 800 is similar todevice 100 except for the apparatus used to attachdevice 800 toproximal tibial component 200. Similar todevice 100,device 800 includesmedial attachment post 861. However,device 800 includesmedial attachment openings medial attachment post 861.Device 800 also includes a lateral attachment post with lateral attachment openings extending therethrough. Attachment ofdevice 800 is facilitated bycable 501.Cable 501 may be made of a woven polymeric material or a monofilament wire.Cable 501 may be first inserted through one of the lateral attachment openings, wrapped around the posterior ofproximal tibial component 200, inserted posteriorly through medial attachment opening 871, inserted anteriorly through medial attachment opening 873, wrapped around the posterior surface ofproximal tibial component 200, and inserted posteriorly through the other lateral attachment opening. In such a configuration, leading end and trailing end ofcable 501 are located adjacent one another. The leading and trailing ends ofcable 501 may be secured by tying them together using any type of knot sufficient for creating a permanent connection. Alternatively, the ends ofcable 501 may be secured by a cable retention device (not shown) affixed tocable 501 adjacent to the lateral attachment openings. - Installation of the soft tissue attachment devices disclosed herein may be aided by a set of specialized tools (not shown) for accurately applying an appropriate amount of tension to the soft tissue attachment device to maximize grip of the tissue without causing necrosis. For example, with regard to
device 100 inFIGS. 1A and 1B , a prosthesis may have anchor points where the tool temporarily anchors to the prosthesis and applies uniform pressure acrossanterior surface 150. The tool may include a gauge showing the amount of pressure being applied to the soft tissue. The tool may further include a dial to slowly increase the amount of force applied. Once the desired pressure is achieved, set screws are tightened againstflat surfaces device 100 to the prosthesis. Such an installation tool enables the surgeon to precisely apply the correct amount of pressure to the soft tissue without fear of creating too much pressure and preventing blood flow in the soft tissue. A similar tool would be useful for installingdevices FIGS. 6, 13, 16, 17, 18, 19 , respectively. An installation tool useful fordevices - It should be noted that any disclosed embodiment may come preinstalled on a prosthesis and merely has enough space between the posterior surface of the device and the anterior surface of the prosthesis in order to pull the soft tissue between the two surfaces.
- Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the embodiments described below be considered as exemplary only, with a true scope and spirit of the invention being indicated by the appended claims. Moreover, none of the features disclosed in this specification should be construed as essential elements, and therefore, no disclosed features should be construed as being part of the claimed invention unless the features are specifically recited in the claims. In addition, it should be understood that any of the features disclosed on any particular embodiment may be incorporated in whole or in part on any of the other disclosed embodiments.
Claims (20)
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US10813769B2 (en) * | 2018-07-24 | 2020-10-27 | DePuy Synthes Products, Inc. | Baseplate of a modular shoulder joint prosthesis and related methods for implanting the same |
AU2019208197A1 (en) | 2018-07-31 | 2020-02-20 | Howmedica Osteonics Corp. | Fixation devices and prostheses for soft tissue connection to the same |
US11000360B2 (en) * | 2018-09-14 | 2021-05-11 | Onkos Surgical, Inc. | Systems and methods for attaching soft tissue to an implant |
US10945850B2 (en) * | 2018-10-25 | 2021-03-16 | Revision Technologies Llc | Interconnected implants and methods |
US11896476B2 (en) | 2020-01-02 | 2024-02-13 | Zkr Orthopedics, Inc. | Patella tendon realignment implant with changeable shape |
US20210205067A1 (en) * | 2020-01-02 | 2021-07-08 | Zkr Orthopedics, Inc. | Patella tendon realignment implant with fixation |
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US20190201184A1 (en) | 2019-07-04 |
AU2018213862A1 (en) | 2019-08-08 |
AU2018213862B2 (en) | 2021-04-15 |
US10799335B2 (en) | 2020-10-13 |
US10251744B2 (en) | 2019-04-09 |
WO2018140224A2 (en) | 2018-08-02 |
US20180214261A1 (en) | 2018-08-02 |
EP3573582A2 (en) | 2019-12-04 |
EP3573582A4 (en) | 2020-07-22 |
WO2018140224A3 (en) | 2018-09-07 |
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