US20090112329A1 - Humeral Head Preserving Implant - Google Patents
Humeral Head Preserving Implant Download PDFInfo
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- US20090112329A1 US20090112329A1 US12/349,550 US34955009A US2009112329A1 US 20090112329 A1 US20090112329 A1 US 20090112329A1 US 34955009 A US34955009 A US 34955009A US 2009112329 A1 US2009112329 A1 US 2009112329A1
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- humeral
- natural
- implant
- stem
- head
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/7258—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
- A61B17/7266—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with fingers moving radially outwardly
Definitions
- a humeral prosthesis for total shoulder joint replacement generally includes a prosthetic humeral stem and a prosthetic humeral head which replaces the natural humeral head and is disposed within the shoulder socket.
- a hemiarthroplasty can be performed, also replacing the humeral head with a prosthetic head.
- blood supply to the head fragment may be adequate, such as, for example, when the head is still attached to one of the tuberosities.
- repairing and salvaging the natural head is preferable to replacing it. Accordingly, prostheses that allow retention and/or repair of the natural humeral head are still desirable.
- a modular humeral implant and associated kit and method for implantation into a humerus that includes a natural humeral shaft and a natural humeral head.
- the modular implant includes a humeral stem for implantation into the natural humeral shaft, and an adapter.
- the adapter includes an anchoring projection and is operable for coupling to the humeral stem.
- the anchoring projection is adapted for insertion into an underside of the natural humeral head.
- the present teachings also provide a method for implanting a modular humeral prosthesis to repair a humeral fracture in which the natural humeral head is still attached to a portion of the natural humeral shaft.
- the method includes rotating the natural humeral head to expose the proximal surface of the natural humeral shaft without severing the attachment.
- a longitudinal bore is prepared into the humeral shaft.
- An adapter is coupled to one of the natural humeral head and a humeral stem, and the humeral stem is implanted into the longitudinal bore.
- the natural humeral head is rotated onto the natural humeral shaft such that the adapter is inserted into the other of the natural humeral head and the humeral stem, and the natural humeral head substantially contacts the natural humeral shaft.
- the present teachings also provide a modular humeral implant for implantation into a humerus that includes a natural humeral shaft and a natural humeral head.
- the implant includes a humeral stem for implantation into the natural humeral shaft, and a plurality of fasteners fastening the natural humeral shaft through the humeral stem to the natural humeral head.
- the present teachings also provide a method for implanting a modular humeral prosthesis to repair a humeral fracture in which the natural humeral head is still attached to a portion of the natural humeral shaft.
- the method includes rotating the natural humeral head to expose a proximal surface of the natural humeral shaft without severing the attachment, preparing a longitudinal bore into the natural humeral shaft; inserting the humeral stem into the bore, rotating the natural humeral head onto the proximal surface of the natural humeral shaft, drilling a plurality of angled bores extending from natural humeral shaft though the humeral stem to the natural humeral head, and inserting fasteners through the angled bores to attach the natural humeral shaft to the natural humeral head.
- the present teachings provide a modular humeral implant for implantation into a humerus that includes a natural humeral shaft and a natural humeral head.
- the implant includes a humeral stem implantable into the natural humeral shaft, and an adapter couplable to the humeral stem, the adapter including an anchoring projection forming a disk directly insertable into an underside of the natural humeral head.
- the implant in another aspect includes a humeral stem for implantation into the natural humeral shaft, and an anchoring portion in the form of a substantially planar plate including a plurality of suturing holes, the planar plate coupled to the humeral stem with a taper lock connection and adapted for insertion into an underside of the natural humeral head.
- the implant in yet another aspect, includes a humeral stem for implantation into the natural humeral shaft, and an anchoring portion in the form of a substantially planar circular disk including a plurality of suturing holes.
- the anchoring portion includes a tapered projection received in a tapered recess of the humeral stem, and the disk is adapted for insertion into a recess formed in an underside of the natural humeral head.
- FIG. 1 is an exploded view of a humeral implant according to the present teachings
- FIG. 1A is an exploded view of a humeral implant according to the present teachings
- FIG. 1B is an exploded view of a humeral implant according to the present teachings
- FIG. 1C is a partially assembled environmental view of a humeral implant according to the present teachings.
- FIG. 1D is a partially assembled environmental view of a humeral implant according to the present teachings.
- FIG. 1E is an isometric environmental view of the adapter of FIG. 1D ;
- FIG. 1F is an environmental isometric view of a humeral implant according to the present teachings.
- FIG. 1G is isometric view of a humeral implant according to the present teachings.
- FIG. 2 is an exploded view of a humeral implant according to the present teachings
- FIG. 2A is a partially assembled environmental view of a humeral implant according to the present teachings
- FIG. 2B is a side view of a humeral implant according to the present teachings.
- FIG. 2C is an environmental sectional view of a humeral implant according to the present teachings.
- FIG. 3 is an environmental view of the humeral implant of FIG. 1 ;
- FIG. 3A is an environmental view of a humeral implant according to the present teachings.
- FIG. 4 is an environmental view of the humeral implant of FIG. 2 ;
- FIG. 5 is kit of modular humeral components according to the present teachings.
- FIGS. 6A-6C illustrate a sequence of implantation procedures according to the present teachings.
- FIG. 6D illustrates an alternative to the procedure of FIG. 6B .
- a modular humeral implant 100 includes a humeral stem 102 and an adapter 104 .
- the humeral stem 102 is adapted to be inserted into a natural humeral shaft 80 , which can be prepared to receive the humeral stem 102 using methods known in the art, such as reaming, drilling, etc.
- the humeral stem 102 can be integral or modular, including two or more separate components, and can be provided in variable lengths and shapes.
- the adapter 104 functions to connect the implanted humeral stem 102 and the natural humeral head 84 .
- the natural humeral head 84 can be intact or reconstructed from fracture fragments by methods known in the art.
- the natural humeral head 84 can be still attached to a portion of the natural humeral shaft 80 , such as, for example, one of the tuberosities 82 . Because the natural humeral head 84 remains attached to the tuberosity 82 , blood supply to the natural humeral head 84 can be preserved, thus improving the therapeutic outcome relative to the risk of localized necrosis.
- the humeral implant 100 can be implanted without severing the attachment of the natural humeral head 84 to the tuberosity 82 , as is discussed below.
- the humeral stem 102 can include a proximal tapered recess 106 that is adapted to taper lock with a tapered projection 108 of the adapter 104 .
- the humeral stem 102 can include a tapered projection 306 that interlocks with a mating tapered recess 308 of the adaptor 104 .
- the angle ⁇ between a longitudinal axis A of the adapter 104 and a proximal end surface 101 of the humeral stem 102 can be 90° or any other angle as desired under particular circumstances.
- the adapter 104 includes an anchoring projection 113 which is adapted for insertion into an underside surface 120 of the natural humeral head 84 .
- the anchoring projection 113 can be a ribbed projection or threaded screw 112 , as illustrated in FIGS. 2 and 4 , or a bulbous projection 110 that defines a convex surface 118 , as illustrated in FIGS. 1 and 3 .
- the bulbous projection 110 can be a ball or a portion of a sphere or ellipsoid or a polyhedral three-dimensional shape, or any other suitable three-dimensional shape.
- the bulbous projection 110 can be bioabsorbable or metallic with an attachment device 111 that includes a porous-coating to promote bone ongrowth and ingrowth.
- the attachment device 111 of the bulbous projection 110 can also define barbs, spikes, threads, grooves or other devices.
- the bulbous projection 110 can also be coupled to the humeral stem 102 using any other means, such as a threaded screw 109 that is threaded from the humeral stem 102 into the bulbous projection 110 , as shown in FIG. 1B , or vice-versa.
- the threaded screw 112 can be directly threaded into cancellous bone through the underside surface 120 of the natural humeral head 84 .
- the natural humeral head 84 can be prepared by removing, if necessary, cancellous bone from the underside surface 120 of the natural humeral head 84 to create a snugly-fitting recess 122 .
- a cancellous bone impactor (not shown) can be used to define a recess 122 that snugly matches the bulbous projection 110 .
- one or more fasteners 132 inserted into corresponding angled bores 130 can be used to re-attach the natural humeral head 84 either exclusively or in conjunction with the projection 110 .
- the fasteners 132 could be placed through the natural humeral shaft 80 and the humeral stem 102 after the humeral head 84 is impacted onto the projection 110 to provide initial stability to the natural humeral head 84 .
- the angled bores 130 can be drilled through the natural humeral shaft 80 and/or tuberority 82 after the humeral stem 102 is inserted into the humeral canal.
- the fasteners 132 could be made of resorbable polylactide, polyglycolide, or combination thereof, or calcium phosphate, bone morphogenetic protein, allograft, etc., or any other biocompatible material.
- the bulbous projection 110 of the adaptor 104 can include guiding bores 152 through which anchoring wires 154 pass to be embedded in the natural humeral head 84 .
- the anchoring wires 154 can be attached to a base plate 161 at the base of the bulbous projection 110 , and are pushed into the natural humeral head 84 by a set screw or other fastener 160 , which is inserted through the tapered projection 108 and pushes against the base plate 161 .
- the anchoring wires 154 can be made of nitinol or other biocompatible material and can have barbs 156 .
- the adapter 104 can include a disk-shaped projection 170 , which can be integrally or modularly attached to the tapered projection 108 .
- the disk-shaped projection 170 has peripheral suturing holes 172 to allow suturing to the natural humeral head 84 .
- the disk-shaped projection 170 can be circular or polygonal or have any other flat shape and can be recessed into the natural humeral head 84 , such that the disk-shaped projection 170 is flush with the underside surface 120 of the natural humeral head 84 .
- the adapter 104 can be replaced with an adapter-stem combination 104 ′, such that the disk-shaped projection 170 is directly coupled to a humeral stem 108 ′.
- the humeral stem 108 ′ can be selected from any suitable stems including a Copeland-style stem 108 ′ illustrated in FIG. 1F , a short hip-style stem 108 ′ illustrated in FIG. 1G , etc.
- the stem 108 ′ can be porous coated and can include suturing holes 105 .
- the adapter 104 can be modular and include a tapered projection 108 and an expandable tubular sleeve 164 that is received in the natural humeral head 84 .
- a plug 162 extends from the tapered projection 108 .
- the plug 162 is inserted into the sleeve 164 causing to expand and lock into the natural humeral head 84 .
- the adapter 104 is replaced with an adapter-stem combination 104 ′, such that the plug 162 is directly coupled to a humeral stem 108 ′, such as a short hip stem.
- the anchoring projection 113 is also directly coupled to a humeral stem 108 ′, such as a short hip stem.
- kits 200 can be assembled together as a kit 200 and made available to the operating surgeon for optimal intraoperative selection depending on the particular patient and condition encountered during reconstructive surgery.
- Various size fasteners 132 can also be included in the kit.
- the kit 200 can also include adapter/stem combinations 108 ′ using a variety of anchoring portions and humeral stems portions, including any of those described above.
- the natural humeral head 84 In operation and with reference to FIGS. 6A-6C , the natural humeral head 84 , while still attached to the tuberosity 82 , is rotated relative to the tuberosity 82 to be examined, exposing the proximal surface 103 of the natural humeral shaft 80 at the proximal end 86 .
- a humeral stem 102 can be selected depending on the condition and size of the natural humeral shaft 80 .
- a longitudinal bore 88 is prepared in the natural humeral shaft 80 to receive the humeral stem 102 , as shown in FIG. 6A .
- Other existing natural shaft fractures can also be repaired, using, if necessary, fixation screws, pins and the like.
- one of the adapters 104 can be selected from the kit 200 for anchoring into the natural humeral head 84 .
- the adapter 104 can be first taper-locked with the humeral stem 102 , which is then inserted into the longitudinal bore 88 , as shown in FIG. 6B , with the bulbous projection 110 exposed above the proximal surface 103 of the natural humeral shaft 80 .
- the natural humeral head 84 can be prepared for receiving the bulbous projection 110 by optionally creating a recess 122 using, for example, an impactor or reamer.
- the natural humeral head 84 can then be rotated back toward the natural humeral shaft 80 and pressed against the bulbous projection 110 until a snug fit is obtained and the underside surface 120 of the natural humeral head substantially contacts the proximal surface 103 of the natural humeral shaft 82 .
- the natural humeral head is sutured to the humeral shaft 80 and to the tuberosities 82 .
- the adapter 104 can be first anchored into the natural humeral head 84 , and then taper-locked into the humeral stem 102 .
- the adapter 104 can be first threaded into the underside surface 120 of the natural humeral head 84 , which is then taper-locked with the humeral stem 102 , after the humeral stem 102 has been inserted into the longitudinal bore 88 , as shown in FIG. 6D .
- the natural humeral head 84 can be sutured to the humeral shaft 80 and to the tuberosities 82 .
- Other fractures proximal humerus can be repaired and rebuilt, as necessary, using methods known in the art for three-part and four-part fractures of the proximal humerus.
- the humeral stem 102 and the adapter 104 can be manufactured from a variety of biocompatible materials such as, for example, Ti6Al4V or CoCrMo.
- the adapter 104 can also be a hybrid combination of titanium or cobalt chromium with bioabsorbable materials, such as polylactides, plyglycolides, calcium phosphate, hydroxyapatite, etc.
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Abstract
Description
- This application is a divisional of U.S. patent application Ser. No. 10/916,102 filed on Aug. 11, 2004. The entire disclosure of the above application is incorporated herein by reference.
- A humeral prosthesis for total shoulder joint replacement generally includes a prosthetic humeral stem and a prosthetic humeral head which replaces the natural humeral head and is disposed within the shoulder socket. For three and four-part humeral head split fractures in which the blood supply to the fragments is compromised, a hemiarthroplasty can be performed, also replacing the humeral head with a prosthetic head.
- In some humeral fractures, however, blood supply to the head fragment may be adequate, such as, for example, when the head is still attached to one of the tuberosities. In such cases, repairing and salvaging the natural head is preferable to replacing it. Accordingly, prostheses that allow retention and/or repair of the natural humeral head are still desirable.
- Various aspects of the invention teach a modular humeral implant and associated kit and method for implantation into a humerus that includes a natural humeral shaft and a natural humeral head. The modular implant includes a humeral stem for implantation into the natural humeral shaft, and an adapter. The adapter includes an anchoring projection and is operable for coupling to the humeral stem. The anchoring projection is adapted for insertion into an underside of the natural humeral head.
- The present teachings also provide a method for implanting a modular humeral prosthesis to repair a humeral fracture in which the natural humeral head is still attached to a portion of the natural humeral shaft. The method includes rotating the natural humeral head to expose the proximal surface of the natural humeral shaft without severing the attachment. A longitudinal bore is prepared into the humeral shaft. An adapter is coupled to one of the natural humeral head and a humeral stem, and the humeral stem is implanted into the longitudinal bore. The natural humeral head is rotated onto the natural humeral shaft such that the adapter is inserted into the other of the natural humeral head and the humeral stem, and the natural humeral head substantially contacts the natural humeral shaft.
- The present teachings also provide a modular humeral implant for implantation into a humerus that includes a natural humeral shaft and a natural humeral head. The implant includes a humeral stem for implantation into the natural humeral shaft, and a plurality of fasteners fastening the natural humeral shaft through the humeral stem to the natural humeral head.
- The present teachings also provide a method for implanting a modular humeral prosthesis to repair a humeral fracture in which the natural humeral head is still attached to a portion of the natural humeral shaft. The method includes rotating the natural humeral head to expose a proximal surface of the natural humeral shaft without severing the attachment, preparing a longitudinal bore into the natural humeral shaft; inserting the humeral stem into the bore, rotating the natural humeral head onto the proximal surface of the natural humeral shaft, drilling a plurality of angled bores extending from natural humeral shaft though the humeral stem to the natural humeral head, and inserting fasteners through the angled bores to attach the natural humeral shaft to the natural humeral head.
- In another aspect, the present teachings provide a modular humeral implant for implantation into a humerus that includes a natural humeral shaft and a natural humeral head. The implant includes a humeral stem implantable into the natural humeral shaft, and an adapter couplable to the humeral stem, the adapter including an anchoring projection forming a disk directly insertable into an underside of the natural humeral head.
- In another aspect the implant includes a humeral stem for implantation into the natural humeral shaft, and an anchoring portion in the form of a substantially planar plate including a plurality of suturing holes, the planar plate coupled to the humeral stem with a taper lock connection and adapted for insertion into an underside of the natural humeral head.
- In yet another aspect, the implant includes a humeral stem for implantation into the natural humeral shaft, and an anchoring portion in the form of a substantially planar circular disk including a plurality of suturing holes. The anchoring portion includes a tapered projection received in a tapered recess of the humeral stem, and the disk is adapted for insertion into a recess formed in an underside of the natural humeral head.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
-
FIG. 1 is an exploded view of a humeral implant according to the present teachings; -
FIG. 1A is an exploded view of a humeral implant according to the present teachings; -
FIG. 1B is an exploded view of a humeral implant according to the present teachings; -
FIG. 1C is a partially assembled environmental view of a humeral implant according to the present teachings; -
FIG. 1D is a partially assembled environmental view of a humeral implant according to the present teachings; -
FIG. 1E is an isometric environmental view of the adapter ofFIG. 1D ; -
FIG. 1F is an environmental isometric view of a humeral implant according to the present teachings; -
FIG. 1G is isometric view of a humeral implant according to the present teachings; -
FIG. 2 is an exploded view of a humeral implant according to the present teachings; -
FIG. 2A is a partially assembled environmental view of a humeral implant according to the present teachings; -
FIG. 2B is a side view of a humeral implant according to the present teachings; -
FIG. 2C is an environmental sectional view of a humeral implant according to the present teachings; -
FIG. 3 is an environmental view of the humeral implant ofFIG. 1 ; -
FIG. 3A is an environmental view of a humeral implant according to the present teachings; -
FIG. 4 is an environmental view of the humeral implant ofFIG. 2 ; -
FIG. 5 is kit of modular humeral components according to the present teachings. -
FIGS. 6A-6C illustrate a sequence of implantation procedures according to the present teachings; and -
FIG. 6D illustrates an alternative to the procedure ofFIG. 6B . - The following description of various embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
- Referring to
FIGS. 1-4 , a modularhumeral implant 100 includes ahumeral stem 102 and anadapter 104. Thehumeral stem 102 is adapted to be inserted into a naturalhumeral shaft 80, which can be prepared to receive thehumeral stem 102 using methods known in the art, such as reaming, drilling, etc. Thehumeral stem 102 can be integral or modular, including two or more separate components, and can be provided in variable lengths and shapes. Theadapter 104 functions to connect the implantedhumeral stem 102 and the naturalhumeral head 84. The naturalhumeral head 84 can be intact or reconstructed from fracture fragments by methods known in the art. The naturalhumeral head 84 can be still attached to a portion of the naturalhumeral shaft 80, such as, for example, one of thetuberosities 82. Because the naturalhumeral head 84 remains attached to thetuberosity 82, blood supply to the naturalhumeral head 84 can be preserved, thus improving the therapeutic outcome relative to the risk of localized necrosis. Thehumeral implant 100 can be implanted without severing the attachment of the naturalhumeral head 84 to thetuberosity 82, as is discussed below. - Referring to
FIG. 1 , thehumeral stem 102 can include a proximaltapered recess 106 that is adapted to taper lock with atapered projection 108 of theadapter 104. Alternatively, as shown inFIG. 1A , thehumeral stem 102 can include atapered projection 306 that interlocks with a mating taperedrecess 308 of theadaptor 104. The angle α between a longitudinal axis A of theadapter 104 and aproximal end surface 101 of thehumeral stem 102 can be 90° or any other angle as desired under particular circumstances. Theadapter 104 includes an anchoringprojection 113 which is adapted for insertion into anunderside surface 120 of the naturalhumeral head 84. The anchoringprojection 113 can be a ribbed projection or threadedscrew 112, as illustrated inFIGS. 2 and 4 , or abulbous projection 110 that defines aconvex surface 118, as illustrated inFIGS. 1 and 3 . Thebulbous projection 110 can be a ball or a portion of a sphere or ellipsoid or a polyhedral three-dimensional shape, or any other suitable three-dimensional shape. Thebulbous projection 110 can be bioabsorbable or metallic with anattachment device 111 that includes a porous-coating to promote bone ongrowth and ingrowth. Theattachment device 111 of thebulbous projection 110 can also define barbs, spikes, threads, grooves or other devices. Instead of a taper-lock, thebulbous projection 110 can also be coupled to thehumeral stem 102 using any other means, such as a threadedscrew 109 that is threaded from thehumeral stem 102 into thebulbous projection 110, as shown inFIG. 1B , or vice-versa. - The threaded
screw 112 can be directly threaded into cancellous bone through theunderside surface 120 of the naturalhumeral head 84. To receive thebulbous projection 110, the naturalhumeral head 84 can be prepared by removing, if necessary, cancellous bone from theunderside surface 120 of the naturalhumeral head 84 to create a snugly-fittingrecess 122. Alternatively, a cancellous bone impactor (not shown) can be used to define arecess 122 that snugly matches thebulbous projection 110. - Referring to
FIG. 3A , one ormore fasteners 132 inserted into correspondingangled bores 130 can be used to re-attach the naturalhumeral head 84 either exclusively or in conjunction with theprojection 110. Thefasteners 132 could be placed through the naturalhumeral shaft 80 and thehumeral stem 102 after thehumeral head 84 is impacted onto theprojection 110 to provide initial stability to the naturalhumeral head 84. For proper placement, theangled bores 130 can be drilled through the naturalhumeral shaft 80 and/ortuberority 82 after thehumeral stem 102 is inserted into the humeral canal. Thefasteners 132 could be made of resorbable polylactide, polyglycolide, or combination thereof, or calcium phosphate, bone morphogenetic protein, allograft, etc., or any other biocompatible material. - Referring to
FIG. 1C , thebulbous projection 110 of theadaptor 104 can include guidingbores 152 through which anchoringwires 154 pass to be embedded in the naturalhumeral head 84. The anchoringwires 154 can be attached to abase plate 161 at the base of thebulbous projection 110, and are pushed into the naturalhumeral head 84 by a set screw orother fastener 160, which is inserted through the taperedprojection 108 and pushes against thebase plate 161. The anchoringwires 154 can be made of nitinol or other biocompatible material and can havebarbs 156. - Referring to
FIGS. 1D and 1E , theadapter 104 can include a disk-shapedprojection 170, which can be integrally or modularly attached to the taperedprojection 108. The disk-shapedprojection 170 has peripheral suturing holes 172 to allow suturing to the naturalhumeral head 84. The disk-shapedprojection 170 can be circular or polygonal or have any other flat shape and can be recessed into the naturalhumeral head 84, such that the disk-shapedprojection 170 is flush with theunderside surface 120 of the naturalhumeral head 84. In another aspect, illustrated inFIG. 1F , theadapter 104 can be replaced with an adapter-stem combination 104′, such that the disk-shapedprojection 170 is directly coupled to ahumeral stem 108′. It will be appreciated that thehumeral stem 108′ can be selected from any suitable stems including a Copeland-style stem 108′ illustrated inFIG. 1F , a short hip-style stem 108′ illustrated inFIG. 1G , etc. Thestem 108′ can be porous coated and can include suturing holes 105. - Referring to
FIG. 2A , theadapter 104 can be modular and include atapered projection 108 and an expandabletubular sleeve 164 that is received in the naturalhumeral head 84. Aplug 162 extends from the taperedprojection 108. Theplug 162 is inserted into thesleeve 164 causing to expand and lock into the naturalhumeral head 84. In another aspect, illustrated inFIG. 2C , theadapter 104 is replaced with an adapter-stem combination 104′, such that theplug 162 is directly coupled to ahumeral stem 108′, such as a short hip stem. In yet another aspect illustrated inFIG. 2B , the anchoringprojection 113 is also directly coupled to ahumeral stem 108′, such as a short hip stem. - Referring to
FIG. 5 ,separate adapters 104 having differently shaped andsized anchoring projections 113, and humeral stems 102 of different shapes and sizes can be assembled together as akit 200 and made available to the operating surgeon for optimal intraoperative selection depending on the particular patient and condition encountered during reconstructive surgery. Various size fasteners 132 (shown inFIG. 3A ) can also be included in the kit. Although not specifically shown inFIG. 5 , thekit 200 can also include adapter/stem combinations 108′ using a variety of anchoring portions and humeral stems portions, including any of those described above. - In operation and with reference to
FIGS. 6A-6C , the naturalhumeral head 84, while still attached to thetuberosity 82, is rotated relative to thetuberosity 82 to be examined, exposing theproximal surface 103 of the naturalhumeral shaft 80 at theproximal end 86. Ahumeral stem 102 can be selected depending on the condition and size of the naturalhumeral shaft 80. Alongitudinal bore 88 is prepared in the naturalhumeral shaft 80 to receive thehumeral stem 102, as shown inFIG. 6A . Other existing natural shaft fractures can also be repaired, using, if necessary, fixation screws, pins and the like. Depending on the condition of the fracture, the size and robustness of the naturalhumeral shaft 80 and naturalhumeral head 84, one of theadapters 104 can be selected from thekit 200 for anchoring into the naturalhumeral head 84. - When the selected
adapter 104 has abulbous projection 110, theadapter 104 can be first taper-locked with thehumeral stem 102, which is then inserted into thelongitudinal bore 88, as shown inFIG. 6B , with thebulbous projection 110 exposed above theproximal surface 103 of the naturalhumeral shaft 80. The naturalhumeral head 84 can be prepared for receiving thebulbous projection 110 by optionally creating arecess 122 using, for example, an impactor or reamer. The naturalhumeral head 84 can then be rotated back toward the naturalhumeral shaft 80 and pressed against thebulbous projection 110 until a snug fit is obtained and theunderside surface 120 of the natural humeral head substantially contacts theproximal surface 103 of the naturalhumeral shaft 82. The natural humeral head is sutured to thehumeral shaft 80 and to thetuberosities 82. Alternatively, theadapter 104 can be first anchored into the naturalhumeral head 84, and then taper-locked into thehumeral stem 102. - When the selected
adapter 104 has an anchoringprojection 113 of the threadedscrew 112 type, theadapter 104 can be first threaded into theunderside surface 120 of the naturalhumeral head 84, which is then taper-locked with thehumeral stem 102, after thehumeral stem 102 has been inserted into thelongitudinal bore 88, as shown inFIG. 6D . The naturalhumeral head 84 can be sutured to thehumeral shaft 80 and to thetuberosities 82. Other fractures proximal humerus can be repaired and rebuilt, as necessary, using methods known in the art for three-part and four-part fractures of the proximal humerus. - The
humeral stem 102 and theadapter 104 can be manufactured from a variety of biocompatible materials such as, for example, Ti6Al4V or CoCrMo. Theadapter 104 can also be a hybrid combination of titanium or cobalt chromium with bioabsorbable materials, such as polylactides, plyglycolides, calcium phosphate, hydroxyapatite, etc. - The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (20)
Priority Applications (1)
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US12/349,550 US20090112329A1 (en) | 2004-08-11 | 2009-01-07 | Humeral Head Preserving Implant |
Applications Claiming Priority (2)
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US10/916,102 US7476253B1 (en) | 2004-08-11 | 2004-08-11 | Humeral head preserving implant |
US12/349,550 US20090112329A1 (en) | 2004-08-11 | 2009-01-07 | Humeral Head Preserving Implant |
Related Parent Applications (1)
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US10/916,102 Division US7476253B1 (en) | 2004-08-11 | 2004-08-11 | Humeral head preserving implant |
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US20090112329A1 true US20090112329A1 (en) | 2009-04-30 |
Family
ID=40223852
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US10/916,102 Expired - Fee Related US7476253B1 (en) | 2004-08-11 | 2004-08-11 | Humeral head preserving implant |
US12/349,550 Abandoned US20090112329A1 (en) | 2004-08-11 | 2009-01-07 | Humeral Head Preserving Implant |
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US10/916,102 Expired - Fee Related US7476253B1 (en) | 2004-08-11 | 2004-08-11 | Humeral head preserving implant |
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CN104083198A (en) * | 2014-07-17 | 2014-10-08 | 唐佩福 | Proximal humerus fixing device |
US20150182340A1 (en) * | 2012-08-06 | 2015-07-02 | Universite de Bordeaux | Condylar prosthesis for a temporo-mandibular joint |
JP2017520350A (en) * | 2014-07-17 | 2017-07-27 | 佩福 唐 | Fixation device for proximal humerus |
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US20090287309A1 (en) | 2007-01-30 | 2009-11-19 | Tornier Sas | Intra-articular joint replacement |
GB2471290A (en) * | 2009-06-23 | 2010-12-29 | Keith Borowsky | Joint repair apparatus |
USD685474S1 (en) | 2010-07-06 | 2013-07-02 | Tornier, Inc. | Prosthesis anchor |
FR2978912A1 (en) | 2011-08-10 | 2013-02-15 | Tornier Inc | ANCILLARY EXTRACTION OF A PROSTHESIS |
US10456264B2 (en) | 2014-01-24 | 2019-10-29 | Tornier, Inc. | Humeral implant anchor system |
EP4140423A1 (en) | 2016-02-28 | 2023-03-01 | Integrated Shoulder Collaboration, Inc. | Shoulder arthroplasty implant system |
US11833055B2 (en) | 2016-02-28 | 2023-12-05 | Integrated Shoulder Collaboration, Inc. | Shoulder arthroplasty implant system |
US10463499B2 (en) | 2016-03-25 | 2019-11-05 | Tornier, Inc. | Stemless shoulder implant with fixation components |
US11129724B2 (en) | 2016-07-28 | 2021-09-28 | Howmedica Osteonics Corp. | Stemless prosthesis anchor component |
EP3687454A2 (en) | 2017-09-25 | 2020-08-05 | Tornier, Inc. | Patient specific stemless prosthesis anchor components |
US11399948B2 (en) | 2017-12-11 | 2022-08-02 | Howmedica Osteonics Corp. | Stemless prosthesis anchor components and kits |
CN108210058A (en) * | 2018-02-27 | 2018-06-29 | 上海交通大学医学院附属新华医院 | A kind of anatomical form artificial bone that proximal humeral fracture is assisted to reset |
CA3114808A1 (en) | 2018-10-02 | 2020-04-09 | Tornier, Inc. | Shoulder prosthesis components and assemblies |
US20220354658A1 (en) | 2019-10-01 | 2022-11-10 | Howmedica Osteonics Corp. | Shoulder prosthesis components and assemblies |
USD951449S1 (en) | 2019-10-01 | 2022-05-10 | Howmedica Osteonics Corp. | Humeral implant |
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