WO2005074841A1 - Anatomic implants designed to minimize instruments and surgical techniques - Google Patents
Anatomic implants designed to minimize instruments and surgical techniques Download PDFInfo
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- WO2005074841A1 WO2005074841A1 PCT/US2005/001645 US2005001645W WO2005074841A1 WO 2005074841 A1 WO2005074841 A1 WO 2005074841A1 US 2005001645 W US2005001645 W US 2005001645W WO 2005074841 A1 WO2005074841 A1 WO 2005074841A1
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- Prior art keywords
- implant
- vertebral
- motion
- endplates
- alternating motion
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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
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
-
- 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
- A61F2/30—Joints
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
-
- 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
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
-
- 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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4625—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
- A61F2002/4627—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
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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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4625—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
- A61F2002/4628—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
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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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4629—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof connected to the endoprosthesis or implant via a threaded connection
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4681—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4681—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
- A61F2002/4683—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering by applying ultrasonic vibrations
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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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4688—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means
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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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4688—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means
- A61F2002/4692—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means fluid
- A61F2002/4694—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means fluid pneumatic
Definitions
- This disclosure relates to a new apparatus and method for implanting an intervertebral implant in a void between a pair of vertebral endplates.
- One embodiment comprises a power source, a drive mechanism coupled to the power source, and an implant adapter driven by the drive mechanism.
- the intervertebral implant is removably coupled to the implant adapter to create a seat in at least one of the vertebral endplates as the intervertebral implant is moved relative to the at least one vertebral endplate.
- Another embodiment comprises positioning the vertebral implant between the vertebral endplates and coupling an implantation tool to the vertebral implant.
- the implantation tool is actuated to generate alternating motion relative to the vertebral endplates.
- the alternating motion has a speed and creates a displacement of the vertebral implant
- the vertebral implant is seated into a profile formed in at least one of the vertebral endplates, and the implantation tool is decoupled from the vertebral implant.
- FIG. 1 is a side view of vertebral column having a destroyed disc.
- FIG. 2 is a exploded schematic view of an apparatus for installing an intervertebral device.
- FIGS. 3a-3f are exemplary implant adapters configured for a variety of intervertebral implants.
- FIGS 4-10 are perspective views of a vertebral implant between a pair of vertebral bodies according to embodiments of the current disclosure.
- the present disclosure relates generally to the field of orthopedic surgery, and more particularly to the instrumentation and techniques for inserting intervertebral devices.
- instrumentation and techniques for inserting intervertebral devices For the purposes of promoting an understanding of the principles of the - invention, reference will now be made to embodiments or examples illustrated in the drawings, and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended. Any alteration and further modifications in the described embodiments, and any further applications of the principles of the invention as described herein are contemplated as would normally occur to one skilled in the art to which the invention relates.
- the numeral 10 refers to vertebral column with a damaged intervertebral disc 12 extending between vertebrae 14 and 16.
- the disc 12 is removed, creating a void between the two intact vertebrae 14 and 16.
- This procedure may be performed using an anterior, anterolateral, lateral, or other approach known to one skilled in the art.
- An implant according to an embodiment of the present invention may then be provided to fill the void between the two intact vertebrae 14 and 16.
- the embodiments of this disclosure may be generally directed toward articulating intervertebral prostheses which restore at least some range of motion at the site of the removed disc 12. It is understood, however, that in alternate embodiments, the methods and apparatus of this disclosure may be used to implant non-articulating devices which may promote fusion of the vertebrae 14 and 16.
- an implantation tool 20 for inserting an implant 22 between two vertebrae 14, 16 may include a handpiece 24, a coupling mechanism 26, and an implant adapter 28.
- the handpiece 24 may include a handpiece body 30 for housing a power device 32, such as an electric motor, coupled to an electrical power connector 36 for driving a drive shaft 38.
- the coupling mechanism 26 may be provided to convert and control, if needed, the motion from the power device 32 into a vibratory, reciprocating, oscillatory, or other type of direction alternating movement.
- the coupling mechanism 26 may include a body 40 for housing a drive mechanism 42 for transferring output motion to the implant adapter 28.
- the drive mechanism 42 may be connected to a conversion mechanism 44, such as one or more cams, for creating reciprocating motion.
- the coupling mechanism 26 may further include a reduction mechanism 46, such as a gearbox connected to the conversion mechanism 44 and/or the drive mechanism 42, for selectively altering the speed and/or force transmitted by the drive mechanism 42.
- the coupling mechanism 26 may also include a drive mechanism 48 for transmitting motion from the handpiece 24.
- the coupling mechanism 26 may include additional or alternative mechanisms as may be necessary to convert and control the motion from the power device 32into a desired output motion.
- U.S. Patent No. 6,610,066, which is incorporated by reference herein, discloses a reciprocating surgical tool having components for converting rotary motion of a powered handpiece into reciprocating motion.
- the implant adapter 28 may include a housing 50 and a drive adapter 52 for removably connecting the implant adapter 28 to the coupling mechanism 26.
- the implant adapter 28 may further include an implant engagement mechanism 54 for engaging the implant 22.
- the implant engagement mechanism 54 may be configured to engage a particular implant 22 or may be adjustable to permit engagement with a variety of implants.
- FIGS. 3a-3f illustrate exemplary embodiments of the implant adapter 28 configured to mate with a variety of implant devices 22.
- the engagement mechanisms 54 can be hooks (FIG. 3a, 3d), pins (FIG. 3b), clamps (FIG. 3c), gripping arms (FIG. 3e), or a threaded projection (FIG. 3f).
- the components of the implantation tool 20 may be made of durable, medically acceptable materials, such as stainless steel, hard coated anodized aluminum, or titanium, for example, capable of being sterilized to medical standards, such as by steam or flash autoclaving, gas sterilization, and/or soaking in a disinfectant solution. Accordingly, the implantation tool 20 may be designed for repeated use.
- the shape, size, and configuration of the components 24-54 are merely exemplary and any of a variety of alternative configurations may be desirable.
- the implant 22 may be a prosthesis such as is disclosed in U.S. Patent No. 6,540,785; U.S. Patent Application No. 10/303,569; or U.S. Patent Application No.
- implant 22 may have a surfaces 60 and 62 having a rough coating 64, features 66 and/or other surface textures for abrading the endplates of the adjacent vertebrae in preparation for seating the implant.
- a coating 64 of biocompatible and osteoconductive material such as nonspherical sintered beads or hydroxyapatite may cover all or a portion of the surfaces 60 and 62.
- Suitable coatings 64 or treatments may include a porous bead coating, a porous mesh coating, osteogenic peptide coating, growth factor coating, rh-BMP coating, and/or grit blasting.
- Suitable features 66 may include spikes (as shown in FIG. 2), serrations, ridges, fins, pyramidal projections, and/or other surface textures.
- the implantation tool 20 may be assembled by attaching the handpiece 24 to the coupling mechanism 26, specifically, the drive shaft 38 may engage the drive mechanism 48.
- the implant adapter 28 may be attached to the coupling mechanism 26, specifically, the drive mechanism 42 may engage the drive adapter 52.
- the electrical power connector 36 may be connected to a power source (not shown) such as an electrical outlet.
- the implant 22 may be attached to the engagement mechanism 54.
- the components 24, 26, 28 of the implantation tool 20 may be modular, pe ⁇ nitting an implantation tool 20 to be assembled and tailored for a particular application.
- a coupling mechanism 26 may be selected having a conversion mechanism 40 designed to generate the desired motion.
- an implant adapter 28 may be selected having an engagement mechanism 54 suitable for engaging the implant 22.
- the design of the handpiece 24, the coupling mechanism 26, and/or the implant adapter 28 may combine or eliminate components.
- drive shaft 38 may directly engage the conversion mechanism 44 or the reduction mechanism 46 without requiring a drive mechanism 48.
- a decompression procedure may be performed by removing the diseased or damaged disc 12.
- the space vacated by the disc 12 may be distracted to receive the implant 22.
- the implant 22 may be placed into the space between the vertebrae 14 and 16.
- Power may be supplied to the power device 32 by the power connector 36 to rotably drive the drive shaft 38.
- the drive shaft 38 may drive the drive mechanism 48 of the coupling mechanism 26.
- the rotary output of the handpiece 24 may pass through the reduction mechanism 46 of the coupling mechanism 26 to reduce the speed, increase force, or change direction of the rotary motion.
- the rotary motion may be converted to a selected vibratory, reciprocating, oscillatory, pulsating or other alternating movement by the conversion mechanism 44 of the coupling mechanism 26.
- the selected alternating movement may be transmitted by the conversion mechanism 44, tlirough the coupled drive mechanism 42 and drive adapter 52, to vibrate the implant adapter 28.
- the vibration of the implant adapter 28 may, in turn, cause the implant 22 to vibrate or otherwise generate an alternating movement relative to the adjacent bone of the vertebral endplates.
- the vibration may cause the rough or featured surfaces 60, 62 of the implant 22 to abrade the adjacent bone, creating an impression of the contour and features of the surfaces 60 and 62 in the vertebral endplates.
- the implant 22 may be the master pattern for its own implantation seat, allowing the general geometry of the host bone to be duplicated and the normal anatomy generally matched, and thereby potentially creating a better fit between the implant 22 and the vertebrae 14, 16.
- the implant 22 may be decoupled from the implant adapter 28 by releasing the engagement mechanism 54 from the implant 22. After the decoupling, the implant 22 may be securely installed between the vertebral bodies 14, 16.
- This technique may also reduce the need for complex fixtures, milling instrumentation, and measurement devices such as trials.
- the surgical access area may be smaller than is required with more complex rigging.
- the surgical preparation needed may also be reduced. Given that most vertebral endplates are typically not flat, but instead have a convex superior endplate and a concave inferior endplate, the self seating action described above may permit an implantation that is uniquely suited to the particular patient's spine, thus promoting long term stability.
- a relative alternating movement 70 provided by the implant adapter 28 (not shown) for seating the implant 22, may be a vibration which moves the implant 22 generally back and forth along a longitudinal axis 72 which extends through the vertebral bodies 14, 16.
- a relative movement 74 may reciprocally rotate the implant 22 about the longitudinal axis 72.
- a relative movement 76 may also or alternatively vibrate the implant 22 along an axis 78 which extends from the anterior side of the implant through the disc space to the posterior side of the implant.
- a relative motion 80 may also or alternatively vibrate the implant 22 along an axis 82 which extends transversely tlirough the disc space.
- the transverse motion 80 in this embodiment, may be particularly suited to an implant 22 having a projection 66, such as the fin of FIG. 5, which extends in the anterior-posterior direction 78. Vibrating the implant 22 in a direction opposite of the anterior direction of implantation may help to prevent the implant from ejecting after implantation. Referring now to FIG.
- the relative motions 70, 76 may also abrade a side portion of the adjacent vertebrae 14, 16 as the implant is seated.
- the relative motion 70 in the direction of the longitudinal axis 72 may be appropriate to drive the spikes into the adjacent vertebrae 14, 16.
- the relative movement 76 may also or alternatively vibrate the implant 22 along the anterior-posterior axis 78.
- the relative motion 80 may also or alternatively vibrate the implant 22 along the transverse axis 82.
- the transverse motion 80 may also be particularly suited to an implant 22 having a transverse projection 66, such as the fin of FIG. 8. Vibrating the implant 22 in a direction opposite of the anterior direction of implantation may help to prevent the implant from ejecting after implantation.
- a relative motion 84 may reciprocally rotate the implant 22 about the axis 78.
- a force 90 may be applied to draw the vertebrae 14, 16 together while the vibration motion 70 is delivered in the longitudinal direction 72.
- the force 90 may push the endplates together (as shown) or may, alternatively, pull the endplates together.
- the combination of force 90 and vibration motion 70 may enhance the seat of the implant 22.
- the relative movements 70, 74, 76, 80, 84 are merely exemplary and other relative motions, such as arc shaped motions, multi-directional, or random motions, may be selected based upon the spinal location, implant configuration, surgical approach or surgical application.
- the speed, force, and other characteristics of the movement of the implant 22 may be adjusted, for example, by varying the speed of the power device 34 or components of the reduction mechanism 46.
- a cam may be designed to provide a stroke of 2-3 millimeters in the implant 22.
- the displacement of implant 22 may also be managed by controlling the magnitude of the vibration, oscillation, or other alternating movement.
- the displacement of the implant caused by the alternating movement 70, 74, 76, 80, 84 may be, for example 2 to 3 millimeters, however larger or smaller displacements may be appropriate for certain applications.
- 90 and the displacement of the implant 22 may be varied as the implant 22 is embedded in the vertebral endplates. For example, greater speed, force, and displacement may be required to embed an elongated projection of the implant 22, however as that projection becomes embedded and the profile of the implant 22 becomes less pronounced, the speed, force, and displacement may be reduced to seat the remainder of the implant 22.
- software and circuitry may be provided to the implantation tool 20 to control the movement implant 22 according to the profile of the implant 22, the hardness of the bone, the material of the coating 64, or other characteristics of the surgical application or components.
- a dampener (not shown) may be included in the implantation tool 20 for dampening the vibration of the implant 22.
- the speed/ frequency of the movements 70, 74, 76, 80, 84 may also be selected to confine motion to the area of the implantation without creating micro motion of the whole spine.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CA002555010A CA2555010A1 (en) | 2004-01-30 | 2005-01-19 | Anatomic implants designed to minimize instruments and surgical techniques |
AU2005211323A AU2005211323B2 (en) | 2004-01-30 | 2005-01-19 | Anatomic implants designed to minimize instruments and surgical techniques |
EP05711637A EP1715822A1 (en) | 2004-01-30 | 2005-01-19 | Anatomic implants designed to minimize instruments and surgical techniques |
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US10/768,420 US20050171550A1 (en) | 2004-01-30 | 2004-01-30 | Anatomic implants designed to minimize instruments and surgical techniques |
US10/768,420 | 2004-01-30 |
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EP (1) | EP1715822A1 (en) |
JP (1) | JP2007519479A (en) |
KR (1) | KR20070004661A (en) |
CN (1) | CN1937972A (en) |
AU (1) | AU2005211323B2 (en) |
CA (1) | CA2555010A1 (en) |
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US9480511B2 (en) | 2009-12-17 | 2016-11-01 | Engage Medical Holdings, Llc | Blade fixation for ankle fusion and arthroplasty |
US10238426B2 (en) | 2009-12-17 | 2019-03-26 | Engage Medical Holdings, Llc | Blade fixation for ankle fusion and arthroplasty |
US9925051B2 (en) | 2010-12-16 | 2018-03-27 | Engage Medical Holdings, Llc | Arthroplasty systems and methods |
US10342667B2 (en) | 2010-12-16 | 2019-07-09 | Engage Medical Holdings, Llc | Arthroplasty systems and methods |
US9254130B2 (en) | 2011-11-01 | 2016-02-09 | Hyun Bae | Blade anchor systems for bone fusion |
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US10390955B2 (en) | 2016-09-22 | 2019-08-27 | Engage Medical Holdings, Llc | Bone implants |
US10456272B2 (en) | 2017-03-03 | 2019-10-29 | Engage Uni Llc | Unicompartmental knee arthroplasty |
Also Published As
Publication number | Publication date |
---|---|
KR20070004661A (en) | 2007-01-09 |
US20050171550A1 (en) | 2005-08-04 |
AU2005211323A1 (en) | 2005-08-18 |
JP2007519479A (en) | 2007-07-19 |
CA2555010A1 (en) | 2005-08-18 |
CN1937972A (en) | 2007-03-28 |
AU2005211323B2 (en) | 2009-01-08 |
EP1715822A1 (en) | 2006-11-02 |
US20080051907A1 (en) | 2008-02-28 |
US7645281B2 (en) | 2010-01-12 |
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