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US20070270823A1 - Multi-chamber expandable interspinous process brace - Google Patents

Multi-chamber expandable interspinous process brace Download PDF

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Publication number
US20070270823A1
US20070270823A1 US11413587 US41358706A US2007270823A1 US 20070270823 A1 US20070270823 A1 US 20070270823A1 US 11413587 US11413587 US 11413587 US 41358706 A US41358706 A US 41358706A US 2007270823 A1 US2007270823 A1 US 2007270823A1
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Patent type
Prior art keywords
process
chamber
spinous
interspinous
expandable
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
Application number
US11413587
Inventor
Hai Trieu
Kent Anderson
Eric Lange
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Warsaw Orthopedic Inc
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SDGI Holdings Inc
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7062Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
    • A61B17/7065Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00535Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
    • A61B2017/00557Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated inflatable

Abstract

A multi-chamber expandable interspinous process brace is disclosed and can include at least two chambers. Each of the at least two chambers can receive an injectable biocompatible material. Further, the multi-chamber expandable interspinous process brace can be moved between a deflated configuration and an inflated configuration. In the inflated configuration, the multi-chamber expandable interspinous process brace can engage and support a superior spinous process and an inferior spinous process.

Description

    FIELD OF THE DISCLOSURE
  • [0001]
    The present disclosure relates generally to orthopedics and orthopedic surgery. More specifically, the present disclosure relates to devices used to support adjacent spinous processes.
  • BACKGROUND
  • [0002]
    In human anatomy, the spine is a generally flexible column that can take tensile and compressive loads. The spine also allows bending motion and provides a place of attachment for keels, muscles and ligaments. Generally, the spine is divided into three sections: the cervical spine, the thoracic spine and the lumbar spine. The sections of the spine are made up of individual bones called vertebrae. Also, the vertebrae are separated by intervertebral discs, which are situated between adjacent vertebrae.
  • [0003]
    The intervertebral discs function as shock absorbers and as joints. Further, the intervertebral discs can absorb the compressive and tensile loads to which the spinal column may be subjected. At the same time, the intervertebral discs can allow adjacent vertebral bodies to move relative to each other a limited amount, particularly during bending, or flexure, of the spine. Thus, the intervertebral discs are under constant muscular and/or gravitational pressure and generally, the intervertebral discs are the first parts of the lumbar spine to show signs of deterioration.
  • [0004]
    Facet joint degeneration is also common because the facet joints are in almost constant motion with the spine. In fact, facet joint degeneration and disc degeneration frequently occur together. Generally, although one may be the primary problem while the other is a secondary problem resulting from the altered mechanics of the spine, by the time surgical options are considered, both facet joint degeneration and disc degeneration typically have occurred. For example, the altered mechanics of the facet joints and/or intervertebral disc may cause spinal stenosis, degenerative spondylolisthesis, and degenerative scoliosis.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0005]
    FIG. 1 is a lateral view of a portion of a vertebral column;
  • [0006]
    FIG. 2 is a lateral view of a pair of adjacent vertrebrae;
  • [0007]
    FIG. 3 is a top plan view of a vertebra;
  • [0008]
    FIG. 4 is a plan view of a first multi-chamber expandable interspinous process spacer in a deflated configuration;
  • [0009]
    FIG. 5 is a plan view of the first multi-chamber expandable interspinous process spacer in an inflated configuration;
  • [0010]
    FIG. 6 is a plan view of the first multi-chamber expandable interspinous process spacer in an inflated configuration with a tether installed there around;
  • [0011]
    FIG. 7 is a plan view of a second multi-chamber expandable interspinous process spacer in a deflated configuration;
  • [0012]
    FIG. 8 is a plan view of the second multi-chamber expandable interspinous process spacer in an inflated configuration;
  • [0013]
    FIG. 9 is a plan view of the second multi-chamber expandable interspinous process spacer in an inflated configuration with a tether installed there around;
  • [0014]
    FIG. 10 is a plan view of a third multi-chamber expandable interspinous process spacer in a deflated configuration;
  • [0015]
    FIG. 11 is a plan view of the third multi-chamber expandable interspinous process spacer in an inflated configuration;
  • [0016]
    FIG. 12 is a plan view of the third multi-chamber expandable interspinous process spacer in an inflated configuration with a tether installed there around;
  • [0017]
    FIG. 13 is a plan view of a fourth multi-chamber expandable interspinous process spacer in a deflated configuration;
  • [0018]
    FIG. 14 is a plan view of the fourth multi-chamber expandable interspinous process spacer in an inflated configuration;
  • [0019]
    FIG. 15 is a plan view of the fourth multi-chamber expandable interspinous process spacer in an inflated configuration with a tether installed there around;
  • [0020]
    FIG. 16 is a plan view of a fifth multi-chamber expandable interspinous process spacer in a deflated configuration;
  • [0021]
    FIG. 17 is a plan view of the fifth multi-chamber expandable interspinous process spacer in an inflated configuration;
  • [0022]
    FIG. 18 is a plan view of the fifth multi-chamber expandable interspinous process spacer in an inflated configuration with a tether installed there around;
  • [0023]
    FIG. 19 is a plan view of a sixth multi-chamber expandable interspinous process spacer in a deflated configuration;
  • [0024]
    FIG. 20 is a plan view of the sixth multi-chamber expandable interspinous process spacer in an inflated configuration;
  • [0025]
    FIG. 21 is a plan view of the sixth multi-chamber expandable interspinous process spacer in an inflated configuration with a tether installed there around; and
  • [0026]
    FIG. 22 is a flow chart illustrating a method of treating a spine.
  • DETAILED DESCRIPTION OF THE DRAWINGS
  • [0027]
    A multi-chamber expandable interspinous process brace is disclosed and can include at least two chambers. Each of the at least two chambers can receive an injectable biocompatible material. Further, the multi-chamber expandable interspinous process brace can be moved between a deflated configuration and an inflated configuration. In the inflated configuration, the multi-chamber expandable interspinous process brace can engage and support a superior spinous process and an inferior spinous process.
  • [0028]
    In another embodiment, a method of treating a spine is disclosed and can include installing a multi-chamber expandable interspinous process brace between a superior spinous process and an inferior spinous process. The method can also include inflating at least two chambers within the multi-chamber expandable interspinous process brace to support the superior spinous process and the inferior spinous process.
  • [0029]
    In still another embodiment, a method of treating a spine is disclosed and can include distracting a superior spinous process and an inferior spinous process. Also, the method can include installing a multi-chamber expandable interspinous process brace between a superior spinous process and an inferior spinous process. Moreover, the method can include inflating at least two chambers within the multi-chamber expandable interspinous process brace to support the superior spinous process and the inferior spinous process.
  • [0030]
    In yet another embodiment, a kit for field use is disclosed and can include a multi-chamber expandable interspinous process brace that can have at least two chambers configured to receive an injectable biocompatible material. The kit can also include an injectable biocompatible material.
  • [0031]
    In still yet another embodiment, a kit for field use is disclosed and can include a multi-chamber expandable interspinous process brace that can include at least two chambers configured to receive an injectable biocompatible material. Additionally, the kit can include an injectable biocompatible material and a tether that can circumscribe the multi-chamber expandable interspinous process brace, a superior spinous process, and an inferior spinous process.
  • [0000]
    Description of Relevant Anatomy
  • [0032]
    Referring initially to FIG. 1, a portion of a vertebral column, designated 100, is shown. As depicted, the vertebral column 100 includes a lumbar region 102, a sacral region 104, and a coccygeal region 106. As is known in the art, the vertebral column 100 also includes a cervical region and a thoracic region. For clarity and ease of discussion, the cervical region and the thoracic region are not illustrated.
  • [0033]
    As shown in FIG. 1, the lumbar region 102 includes a first lumbar vertebra 108, a second lumbar vertebra 110, a third lumbar vertebra 112, a fourth lumbar vertebra 114, and a fifth lumbar vertebra 116. The sacral region 104 includes a sacrum 118. Further, the coccygeal region 106 includes a coccyx 120.
  • [0034]
    As depicted in FIG. 1, a first intervertebral lumbar disc 122 is disposed between the first lumbar vertebra 108 and the second lumbar vertebra 110. A second intervertebral lumbar disc 124 is disposed between the second lumbar vertebra 110 and the third lumbar vertebra 112. A third intervertebral lumbar disc 126 is disposed between the third lumbar vertebra 112 and the fourth lumbar vertebra 114. Further, a fourth intervertebral lumbar disc 128 is disposed between the fourth lumbar vertebra 114 and the fifth lumbar vertebra 116. Additionally, a fifth intervertebral lumbar disc 130 is disposed between the fifth lumbar vertebra 116 and the sacrum 118.
  • [0035]
    In a particular embodiment, if one of the intervertebral lumbar discs 122, 124, 126, 128, 130 is diseased, degenerated, damaged, or otherwise in need of repair, treatment of that intervertebral lumbar disc 122, 124, 126, 128, 130 can be effected in accordance with one or more of the embodiments described herein.
  • [0036]
    FIG. 2 depicts a detailed lateral view of two adjacent vertebrae, e.g., two of the lumbar vertebra 108, 110, 112, 114, 116 shown in FIG. 1. FIG. 2 illustrates a superior vertebra 200 and an inferior vertebra 202. As shown, each vertebra 200, 202 includes a vertebral body 204, a superior articular process 206, a transverse process 208, a spinous process 210 and an inferior articular process 212. FIG. 2 further depicts an intervertebral disc 216 between the superior vertebra 200 and the inferior vertebra 202.
  • [0037]
    Referring to FIG. 3, a vertebra, e.g., the inferior vertebra 202 (FIG. 2), is illustrated. As shown, the vertebral body 204 of the inferior vertebra 202 includes a cortical rim 302 composed of cortical bone. Also, the vertebral body 204 includes cancellous bone 304 within the cortical rim 302. The cortical rim 302 is often referred to as the apophyseal rim or apophyseal ring. Further, the cancellous bone 304 is softer than the cortical bone of the cortical rim 302.
  • [0038]
    As illustrated in FIG. 3, the inferior vertebra 202 further includes a first pedicle 306, a second pedicle 308, a first lamina 310, and a second lamina 312. Further, a vertebral foramen 314 is established within the inferior vertebra 202. A spinal cord 316 passes through the vertebral foramen 314. Moreover, a first nerve root 318 and a second nerve root 320 extend from the spinal cord 316.
  • [0039]
    It is well known in the art that the vertebrae that make up the vertebral column have slightly different appearances as they range from the cervical region to the lumbar region of the vertebral column. However, all of the vertebrae, except the first and second cervical vertebrae, have the same basic structures, e.g., those structures described above in conjunction with FIG. 2 and FIG. 3. The first and second cervical vertebrae are structurally different than the rest of the vertebrae in order to support a skull.
  • Description of a First Embodiment of a Multi-Chamber Expandable Interspinous Process Brace
  • [0040]
    Referring to FIG. 4 through FIG. 6, a first embodiment of a multi-chamber expandable interspinous process brace is shown and is generally designated 400. As shown, the multi-chamber expandable interspinous process brace 400 includes an interior chamber 402 and an exterior chamber 404.
  • [0041]
    In a particular embodiment, the interior chamber 402 can be generally elliptical. Alternatively, the interior chamber 402 can be generally spherical, generally pyramidal, generally conical, generally frustal, generally cubic, generally polyhedral, or a combination thereof. The exterior chamber 404 can be provided in a shape that can generally engage and/or stabilize at least one spinous process, such as, for example, the spinous processes of two adjacent vertebrae. In a particular embodiment, the exterior chamber 404 can be generally H-shaped.
  • [0042]
    Further, in a particular embodiment, the chambers 402, 404 can be made from one or more expandable biocompatible materials. For example, the materials can be silicones, polyurethanes, polycarbonate urethanes, polyethylene terephthalate, silicone copolymers, polyolefins, or any combination thereof. Also, the chambers 402, 404 can be non-porous or micro-porous, e.g., for venting purposes.
  • [0043]
    As shown in FIG. 4, the interior chamber 402 can include a first injection tube 406. Further, the exterior chamber 404 can include a second injection tube 408. The injection tubes 406, 408 can be used to provide an injectable biocompatible material to the chambers 402, 404. In a particular embodiment, each of the interior chamber 402 and the exterior chamber 404 of the multi-chamber expandable interspinous process brace 400 can be expanded from a respective deflated configuration, shown in FIG. 4, to one of a plurality of inflated configurations, shown in FIG. 5, up to a maximum inflated configuration. Further, after the interior chamber 402 and the exterior chamber 404 are inflated, or otherwise expanded, the injection tubes 406, 408 can be removed, as depicted in FIG. 6.
  • [0044]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 400 can include a first self-sealing valve (not shown) within the interior chamber 402, e.g., adjacent to the first injection tube 406. Moreover, the multi-chamber expandable interspinous process brace 400 can include a second self-sealing valve (not shown) within the exterior chamber 404, e.g., adjacent to the second injection tube 408. The self-sealing valves can prevent the chambers 402, 404 from leaking material after the chambers 402, 404 are inflated and the injection tubes 406, 408 are removed.
  • [0045]
    As illustrated in FIG. 4 through FIG. 6, the exterior chamber 404 can include a superior spinous process pocket 410 and an inferior spinous process pocket 412. Further, a superior spinous process engagement structure 420 can extend from the exterior chamber 404 within the superior spinous process pocket 410. Also, an inferior spinous process engagement structure 422 can extend from the exterior chamber 404 within the inferior spinous process pocket 410. In a particular embodiment, each of the spinous process engagement structures 420, 422 can be one or more spikes, one or more teeth, a combination thereof, or some other structure configured to engage a spinous process.
  • [0046]
    FIG. 4 through FIG. 6 indicate that the multi-chamber expandable interspinous process brace 400 can be implanted between a superior spinous process 500 and an inferior spinous process 502. In a particular embodiment, the chambers 402, 404 can be inflated so the exterior chamber 404 engages the spinous processes 500, 502. In a particular embodiment, when the multi-chamber expandable interspinous process brace 400 is properly installed and inflated between the superior spinous process 500 and the inferior spinous process 502, the superior spinous process pocket 410 can engage and support the superior spinous process 500. Further, the inferior spinous process pocket 412 can engage and support an inferior spinous process 502.
  • [0047]
    More specifically, the superior spinous process engagement structure 420 can extend slightly into and engage the superior spinous process 500. Also, the inferior spinous process engagement structure 422 can extend slightly into and engage the inferior spinous process 502. Accordingly, the spinous process engagement structures 420, 422, the spinous process pockets 410, 412, or a combination thereof can substantially prevent the multi-chamber expandable interspinous process brace 400 from migrating with respect to the spinous processes 500, 502.
  • [0048]
    Also, in a particular embodiment, the multi-chamber expandable interspinous process brace 400 can be movable between a deflated configuration, shown in FIG. 4, and one or more inflated configurations, shown in FIG. 5 and FIG. 6. In the deflated configuration, a distance 510 between the superior spinous process pocket 410 and the inferior spinous process pocket 412 can be at a minimum. However, as one or more materials are injected into the chambers 402, 404, the distance 510 between the superior spinous process pocket 410 and the inferior spinous process pocket 412 can increase.
  • [0049]
    Accordingly, the multi-chamber expandable interspinous process brace 400 can be installed between a superior spinous process 500 and an inferior spinous process 502. Further, the multi-chamber expandable interspinous process brace 400 can be expanded, e.g., by injecting one or more materials into the chambers 402, 404, in order to increase the distance between the superior spinous process 500 and the inferior spinous process 502.
  • [0050]
    Alternatively, a distractor can be used to increase the distance between the superior spinous process 500 and the inferior spinous process 502 and the multi-chamber expandable interspinous process brace 400 can be expanded to support the superior spinous process 500 and the inferior spinous process 502. After the multi-chamber expandable interspinous process brace 400 is expanded accordingly, the distractor can be removed and the multi-chamber expandable interspinous process brace 400 can support the superior spinous process 500 and the inferior spinous process 502 to substantially prevent the distance between the superior spinous process 502 and the inferior spinous process 500 from returning to a pre-distraction value.
  • [0051]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 400 can be injected with one or more injectable biocompatible materials that remain elastic after curing. Further, the injectable biocompatible materials can include polymer materials that remain elastic after curing. Also, the injectable biocompatible materials can include ceramics.
  • [0052]
    For example, the polymer materials can include polyurethanes, polyolefins, silicones, silicone polyurethane copolymers, polymethylmethacrylate (PMMA), epoxies, cyanoacrylate, hydrogels, or a combination thereof. Further, the polyolefin materials can include polypropylenes, polyethylenes, halogenated polyolefins, or flouropolyolefins.
  • [0053]
    The hydrogels can include polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM), polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  • [0054]
    In a particular embodiment, the ceramics can include calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof. In an alternative embodiment, the injectable biocompatible materials can include one or more fluids such as sterile water, saline, or sterile air.
  • [0055]
    In a particular embodiment, the hardness of the material used to inflate the interior chamber 402 can be less than or equal to the hardness of the material used to inflate the exterior chamber 404, i.e., after the materials used to inflate the interior chamber 402 and the exterior chamber 404 are cured. Alternatively, the viscosity of the material used to inflate the interior chamber 402 can be less than or equal to the viscosity of the material used to inflate the exterior chamber 404. In a particular embodiment, certain or all of the injected materials can be cured or cross-linked in situ to form a solid interspinous process brace with non-uniform bulk properties.
  • [0056]
    FIG. 6 indicates that a tether 600 can be installed around the multi-chamber expandable interspinous process brace 400, after the multi-chamber expandable interspinous process brace 400 is expanded as described herein. As shown, the tether 600 can include a proximal end 602 and a distal end 604. In a particular embodiment, the tether 600 can circumscribe the multi-chamber expandable interspinous process brace 400 and the spinous processes 500, 502. Further, the ends 602, 604 of the tether 600 can be brought together and one or more fasteners can be installed therethrough to connect the ends 602, 604. Accordingly, the tether 600 can be installed in order to prevent the distance between the spinous processes 500, 502 from substantially increasing beyond the distance provided by the multi-chamber expandable interspinous process brace 400 after it is expanded and to maintain engagement of the interspinous processes with the spinous process pockets 410, 412, the engagement structures 420, 422, or a combination thereof.
  • [0057]
    In a particular embodiment, the tether 600 can comprise a biocompatible elastomeric material that flexes during installation and provides a resistance fit against the inferior process. Further, the tether 600 can comprise a substantially non-resorbable suture or the like.
  • Description of a Second Embodiment of a Multi-chamber Expandable Interspinous Process Brace
  • [0058]
    Referring to FIG. 7 through FIG. 9, a second embodiment of a multi-chamber expandable interspinous process brace is shown and is generally designated 700. As shown, the multi-chamber expandable interspinous process brace 700 includes an interior chamber 702 and an exterior chamber 704.
  • [0059]
    The interior chamber 702 and the exterior chamber 704 can be provided in a shape that can generally engage and/or stabilize at least one spinous process, such as, for example, the spinous processes of two adjacent vertebrae. In a particular embodiment, the interior chamber 702 can be generally H-shaped. Also, in a particular embodiment, the exterior chamber 704 can be hollow and generally H-shaped. More specifically, the exterior chamber 704 can be shaped to match the outer perimeter of the interior chamber 702.
  • [0060]
    Further, in a particular embodiment, the chambers 702, 704 can be made from one or more expandable biocompatible materials. For example, the materials can be silicones, polyurethanes, polycarbonate urethanes, polyethylene terephthalate, silicone copolymers, polyolefins, or any combination thereof. Also, the chambers 702, 704 can be non-porous or micro-porous, e.g., for venting purposes.
  • [0061]
    As shown in FIG. 7, the interior chamber 702 can include a first injection tube 706. Further, the exterior chamber 704 can include a second injection tube 708. The injection tubes 706, 708 can be used to provide an injectable biocompatible material to the chambers 702, 704. In a particular embodiment, each of the interior chamber 702 and the exterior chamber 704 of the multi-chamber expandable interspinous process brace 700 can be expanded from a respective deflated configuration, shown in FIG. 7, to one of a plurality of inflated configurations, shown in FIG. 8, up to a maximum inflated configuration. Further, after the interior chamber 702 and the exterior chamber 704 are inflated, or otherwise expanded, the injection tubes 706, 708 can be removed, as depicted in FIG. 9.
  • [0062]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 700 can include a first self-sealing valve (not shown) within the interior chamber 702, e.g., adjacent to the first injection tube 706. Moreover, the multi-chamber expandable interspinous process brace 700 can include a second self-sealing valve (not shown) within the exterior chamber 704, e.g., adjacent to the second injection tube 708. The self-sealing valves can prevent the chambers 702, 704 from leaking material after the chambers 702, 704 are inflated and the injection tubes 706, 708 are removed.
  • [0063]
    As illustrated in FIG. 7 through FIG. 9, the exterior chamber 704 can include a superior spinous process pocket 710 and an inferior spinous process pocket 712. Further, a superior spinous process engagement structure 720 can extend from the exterior chamber 704 within the superior spinous process pocket 710. Also, an inferior spinous process engagement structure 722 can extend from the exterior chamber 704 within the inferior spinous process pocket 710. In a particular embodiment, each of the spinous process engagement structures 720, 722 can be one or more spikes, one or more teeth, a combination thereof, or some other structure configured to engage a spinous process.
  • [0064]
    FIG. 7 through FIG. 9 indicate that the multi-chamber expandable interspinous process brace 700 can be implanted between a superior spinous process 800 and an inferior spinous process 802. In a particular embodiment, the chambers 702, 704 can be inflated so the exterior chamber 704 engages the spinous processes 800, 802. In a particular embodiment, when the multi-chamber expandable interspinous process brace 700 is properly installed and inflated between the superior spinous process 800 and the inferior spinous process 802, the superior spinous process pocket 710 can engage and support the superior spinous process 800. Further, the inferior spinous process pocket 712 can engage and support an inferior spinous process 802.
  • [0065]
    More specifically, the superior spinous process engagement structure 720 can extend slightly into and engage the superior spinous process 800. Also, the inferior spinous process engagement structure 722 can extend slightly into and engage the inferior spinous process 802. Accordingly, the spinous process engagement structures 720, 722, the spinous process pockets 710, 712, or a combination thereof can substantially prevent the multi-chamber expandable interspinous process brace 700 from migrating with respect to the spinous processes 800, 802.
  • [0066]
    Also, in a particular embodiment, the multi-chamber expandable interspinous process brace 700 can be movable between a deflated configuration, shown in FIG. 7, and one or more inflated configurations, shown in FIG. 8 and FIG. 9. In the deflated configuration, a distance 810 between the superior spinous process pocket 710 and the inferior spinous process pocket 712 can be at a minimum. However, as one or more materials are injected into the chambers 702, 704, the distance 810 between the superior spinous process pocket 710 and the inferior spinous process pocket 712 can increase.
  • [0067]
    Accordingly, the multi-chamber expandable interspinous process brace 700 can be installed between a superior spinous process 800 and an inferior spinous process 802. Further, the multi-chamber expandable interspinous process brace 700 can be expanded, e.g., by injecting one or more materials into the chambers 702, 704, in order to increase the distance between the superior spinous process 800 and the inferior spinous process 802.
  • [0068]
    Alternatively, a distractor can be used to increase the distance between the superior spinous process 800 and the inferior spinous process 802 and the multi-chamber expandable interspinous process brace 700 can be expanded to support the superior spinous process 800 and the inferior spinous process 802. After the multi-chamber expandable interspinous process brace 700 is expanded accordingly, the distractor can be removed and the multi-chamber expandable interspinous process brace 700 can support the superior spinous process 800 and the inferior spinous process 802 to substantially prevent the distance between the superior spinous process 802 and the inferior spinous process 800 from returning to a pre-distraction value.
  • [0069]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 700 can be injected with one or more injectable biocompatible materials that remain elastic after curing. Further, the injectable biocompatible materials can include polymer materials that remain elastic after curing. Also, the injectable biocompatible materials can include ceramics.
  • [0070]
    For example, the polymer materials can include polyurethanes, polyolefins, silicones, silicone polyurethane copolymers, polymethylmethacrylate (PMMA), epoxies, cyanoacrylates, hydrogels, or a combination thereof. Further, the polyolefin materials can include polypropylenes, polyethylenes, halogenated polyolefins, or flouropolyolefins.
  • [0071]
    The hydrogels can include polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM), polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  • [0072]
    In a particular embodiment, the ceramics can include calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof. In an alternative embodiment, the injectable biocompatible materials can include one or more fluids such as sterile water, saline, or sterile air.
  • [0073]
    In a particular embodiment, the hardness of the material used to inflate the interior chamber 702 can be greater than or equal to the hardness of the material used to inflate the exterior chamber 704, i.e., after the materials used to inflate the interior chamber 702 and the exterior chamber 704 are cured. Alternatively, the viscosity of the material used to inflate the interior chamber 702 can be greater than or equal to the viscosity of the material used to inflate the exterior chamber 704. In a particular embodiment, certain or all of the injected materials can be cured or cross-linked in situ to form a solid interspinous process brace with non-uniform bulk properties.
  • [0074]
    FIG. 9 indicates that a tether 900 can be installed around the multi-chamber expandable interspinous process brace 700, after the multi-chamber expandable interspinous process brace 700 is expanded as described herein. As shown, the tether 900 can include a proximal end 902 and a distal end 904. In a particular embodiment, the tether 900 can circumscribe the multi-chamber expandable interspinous process brace 700 and the spinous processes 800, 802. Further, the ends 902, 904 of the tether 900 can be brought together and one or more fasteners can be installed therethrough to connect the ends 902, 904. Accordingly, the tether 900 can be installed in order to prevent the distance between the spinous processes 800, 802 from substantially increasing beyond the distance provided by the multi-chamber expandable interspinous process brace 700 after it is expanded and to maintain engagement of the interspinous processes with the spinous process pockets 710, 712, the engagement structures 720, 722, or a combination thereof.
  • [0075]
    In a particular embodiment, the tether 900 can comprise a biocompatible elastomeric material that flexes during installation and provides a resistance fit against the inferior process. Further, the tether 900 can comprise a substantially non-resorbable suture or the like.
  • Description of a Third Embodiment of a Multi-Chamber Expandable Interspinous Process Brace
  • [0076]
    Referring to FIG. 10 through FIG. 12, a third embodiment of a multi-chamber expandable interspinous process brace is shown and is generally designated 1000. As shown, the multi-chamber expandable interspinous process brace 1000 includes a central chamber 1002, a superior chamber 1004, and an inferior chamber 1006.
  • [0077]
    In a particular embodiment, the central chamber 1002 can be generally horizontally elongated. Also, in a particular embodiment, the superior chamber 1004 can be shaped similar to the top half of a letter H and the inferior chamber 1006 can be shaped similar to the bottom half of a letter H. Together, the central chamber 1002, the superior chamber 1004, and the inferior chamber 1006 can be provided in a shape that can generally engage and/or stabilize at least one spinous process, such as, for example, the spinous processes of two adjacent vertebrae. In a particular embodiment, together, the chambers 1002, 1004 and 1006 can be can be generally H-shaped.
  • [0078]
    Further, in a particular embodiment, the chambers 1002, 1004, 1006 can be made from one or more expandable biocompatible materials. For example, the materials can be silicones, polyurethanes, polycarbonate urethanes, polyethylene terephthalate, silicone copolymers, polyolefins, or any combination thereof. Also, the chambers 1002, 1004, 1006 can be non-porous or micro-porous, e.g., for venting purposes.
  • [0079]
    As shown in FIG. 10, the central chamber 1002 can include a first injection tube 1008. The superior chamber 1004 can include a second injection tube 1010 and the inferior chamber 1006 can include a third injection tube 1012. The injection tubes 1008, 1010, 1012 can be used to provide one or more injectable biocompatible material to the chambers 1002, 1004, 1006. In a particular embodiment, each of the central chamber 1002, the superior chamber 1004, and the inferior chamber 1006 of the multi-chamber expandable interspinous process brace 1000 can be expanded from a respective deflated configuration, shown in FIG. 10, to one of a plurality of inflated configurations, shown in FIG. 11 and FIG. 12, up to a maximum inflated configuration. Further, after the chambers 1002, 1004, 1006 are inflated, or otherwise expanded, the injection tubes 1008, 1010, 1012 can be removed, as depicted in FIG. 12.
  • [0080]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1000 can include a first self-sealing valve (not shown) within the central chamber 1002, e.g., adjacent to the first injection tube 1008. Moreover, the multi-chamber expandable interspinous process brace 1000 can include a second self-sealing valve (not shown) within the superior chamber 1004, e.g., adjacent to the second injection tube 1010. The multi-chamber expandable interspinous process brace 1000 can also include a third self-sealing valve (not shown) within the inferior chamber 1006. The self-sealing valves can prevent the chambers 1002, 1004, 1006 from leaking material after the chambers 1002, 1004, 1006 are inflated and the injection tubes 1008, 1010, 1012 are removed.
  • [0081]
    As illustrated in FIG. 10 through FIG. 12, the superior chamber 1004 can include a superior spinous process pocket 1014 and the inferior chamber 1006 can include an inferior spinous process pocket 1016. Further, a superior spinous process engagement structure 1020 can extend from the superior chamber 1004 within the superior spinous process pocket 1010. Also, an inferior spinous process engagement structure 1022 can extend from the inferior chamber 1004 within the inferior spinous process pocket 1010. In a particular embodiment, each of the spinous process engagement structures 1020, 1022 can be one or more spikes, one or more teeth, a combination thereof, or some other structure configured to engage a spinous process.
  • [0082]
    FIG. 10 through FIG. 12 indicate that the multi-chamber expandable interspinous process brace 1000 can be implanted between a superior spinous process 1100 and an inferior spinous process 1102. In a particular embodiment, the chambers 1002, 1004, 1006 can be inflated so the superior chamber 1004 engages the superior spinous process 1100 and the inferior chamber 1006 engages the inferior spinous process 1102. In a particular embodiment, when the multi-chamber expandable interspinous process brace 1000 is properly installed and inflated between the superior spinous process 1100 and the inferior spinous process 1102, the superior spinous process pocket 1014 can engage and support the superior spinous process 1100. Further, the inferior spinous process pocket 1016 can engage and support an inferior spinous process 1102.
  • [0083]
    More specifically, the superior spinous process engagement structure 1020 can extend slightly into and engage the superior spinous process 1100. Also, the inferior spinous process engagement structure 1022 can extend slightly into and engage the inferior spinous process 1102. Accordingly, the spinous process engagement structures 1020, 1022, the spinous process pockets 1014, 1016, or a combination thereof can substantially prevent the multi-chamber expandable interspinous process brace 1000 from migrating with respect to the spinous processes 1100, 1102.
  • [0084]
    Also, in a particular embodiment, the multi-chamber expandable interspinous process brace 1000 can be movable between a deflated configuration, shown in FIG. 10, and one or more inflated configurations, shown in FIG. 11 and FIG. 12. In the deflated configuration, a distance 1110 between the superior spinous process pocket 1014 and the inferior spinous process pocket 1016 can be at a minimum. However, as one or more materials are injected into the chambers 1002, 1004, 1006 the distance 1110 between the superior spinous process pocket 1014 and the inferior spinous process pocket 1016 can increase.
  • [0085]
    Accordingly, the multi-chamber expandable interspinous process brace 1000 can be installed between a superior spinous process 1100 and an inferior spinous process 1102. Further, the multi-chamber expandable interspinous process brace 1000 can be expanded, e.g., by injecting one or more materials into the chambers 1002, 1004, 1006 in order to increase the distance between the superior spinous process 1100 and the inferior spinous process 1102.
  • [0086]
    Alternatively, a distractor can be used to increase the distance between the superior spinous process 1100 and the inferior spinous process 1102 and the multi-chamber expandable interspinous process brace 1000 can be expanded to support the superior spinous process 1100 and the inferior spinous process 1102. After the multi-chamber expandable interspinous process brace 1000 is expanded accordingly, the distractor can be removed and the multi-chamber expandable interspinous process brace 1000 can support the superior spinous process 1100 and the inferior spinous process 1102 to substantially prevent the distance between the superior spinous process 1102 and the inferior spinous process 1100 from returning to a pre-distraction value.
  • [0087]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1000 can be injected with one or more injectable biocompatible materials that remain elastic after curing. Further, the injectable biocompatible materials can include polymer materials that remain elastic after curing. Also, the injectable biocompatible materials can include ceramics.
  • [0088]
    For example, the polymer materials can include polyurethanes, polyolefins, silicones, silicone polyurethane copolymers, polymethylmethacrylate (PMMA), epoxies, cyanoacrylates, hydrogels, or a combination thereof. Further, the polyolefin materials can include polypropylenes, polyethylenes, halogenated polyolefins, or flouropolyolefins.
  • [0089]
    The hydrogels can include polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM), polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  • [0090]
    In a particular embodiment, the ceramics can include calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof. In an alternative embodiment, the injectable biocompatible materials can include one or more fluids such as sterile water, saline, or sterile air.
  • [0091]
    In a particular embodiment, the hardness of the material used to inflate the central chamber 1002 can be less than or equal to the hardness of the material used to inflate the superior chamber 1004 and the inferior chamber 1006, i.e., after the materials used to inflate the central chamber 1002, the superior chamber 1004, and the inferior chamber 1006 are cured. Alternatively, the viscosity of the material used to inflate the central chamber 1002 can be less than or equal to the viscosity of the material used to inflate the superior chamber 1004 and the inferior chamber 1006. In a particular embodiment, certain or all of the injected materials can be cured or cross-linked in situ to form a solid interspinous process brace with non-uniform bulk properties.
  • [0092]
    FIG. 12 indicates that a tether 1200 can be installed around the multi-chamber expandable interspinous process brace 1000, after the multi-chamber expandable interspinous process brace 1000 is expanded as described herein. As shown, the tether 1200 can include a proximal end 1202 and a distal end 1204. In a particular embodiment, the tether 1200 can circumscribe the multi-chamber expandable interspinous process brace 1000 and the spinous processes 1100, 1102. Further, the ends 1202, 1204 of the tether 1200 can be brought together and one or more fasteners can be installed therethrough to connect the ends 1202, 1204. Accordingly, the tether 1200 can be installed in order to prevent the distance between the spinous processes 1100, 1102 from substantially increasing beyond the distance provided by the multi-chamber expandable interspinous process brace 1000 after it is expanded and to maintain engagement of the interspinous processes with the spinous process pockets 1014, 1016, engagement structures 1020, 1022, or a combination thereof.
  • [0093]
    In a particular embodiment, the tether 1200 can comprise a biocompatible elastomeric material that flexes during installation and provides a resistance fit against the inferior process. Further, the tether 1200 can comprise a substantially non-resorbable suture or the like.
  • Description of a Fourth Embodiment of a Multi-Chamber Expandable Interspinous Process Brace
  • [0094]
    Referring to FIG. 13 through FIG. 15, a fourth embodiment of a multi-chamber expandable interspinous process brace is shown and is generally designated 1300. As shown, the multi-chamber expandable interspinous process brace 1300 includes a central chamber 1302, a first lateral chamber 1304, and a second lateral chamber 1306.
  • [0095]
    In a particular embodiment, the central chamber 1302 can be generally vertically elongated. Also, in a particular embodiment, the first lateral chamber 1304 can be vertically elongated and can extend along a first side of the central chamber 1302. The second lateral chamber 1306 can also be vertically elongated and can extend along a second side of the central chamber 1302. As shown, the lateral chambers 1304, 1306 can extend beyond a top and bottom of the central chamber 1302. Together, the central chamber 1302, the first lateral chamber 1304, and the second lateral chamber 1306 can be provided in a shape that can generally engage and/or stabilize at least one spinous process, such as, for example, the spinous processes of two adjacent vertebrae. In a particular embodiment, together, the chambers 1302, 1304 and 1306 can be generally H-shaped.
  • [0096]
    Further, in a particular embodiment, the chambers 1302, 1304, 1306 can be made from one or more expandable biocompatible materials. For example, the materials can be silicones, polyurethanes, polycarbonate urethanes, polyethylene terephthalate, silicone copolymers, polyolefins, or any combination thereof. Also, the chambers 1302, 1304, 1306 can be non-porous or micro-porous, e.g., for venting purposes.
  • [0097]
    As shown in FIG. 13, the central chamber 1302 can include a first injection tube 1308. The first lateral chamber 1304 can include a second injection tube 1310 and the second lateral chamber 1306 can include a third injection tube 1312. The injection tubes 1308, 1310, 1312 can be used to provide one or more injectable biocompatible material to the chambers 1302, 1304, 1306. In a particular embodiment, each of the central chamber 1302, the first lateral chamber 1304, and the second lateral chamber 1306 of the multi-chamber expandable interspinous process brace 1300 can be expanded from a respective deflated configuration, shown in FIG. 13, to one of a plurality of inflated configurations, shown in FIG. 14 and FIG. 15, up to a maximum inflated configuration. Further, after the chambers 1302, 1304, 1306 are inflated, or otherwise expanded, the injection tubes 1308, 1310, 1312 can be removed, as depicted in FIG. 15.
  • [0098]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1300 can include a first self-sealing valve (not shown) within the central chamber 1302, e.g., adjacent to the first injection tube 1308. Moreover, the multi-chamber expandable interspinous process brace 1300 can include a second self-sealing valve (not shown) within the first lateral chamber 1304, e.g., adjacent to the second injection tube 1310. The multi-chamber expandable interspinous process brace 1300 can also include a third self-sealing valve (not shown) within the second lateral chamber 1306. The self-sealing valves can prevent the chambers 1302, 1304, 1306 from leaking material after the chambers 1302, 1304, 1306 are inflated and the injection tubes 1308, 1310, 1312 are removed.
  • [0099]
    As illustrated in FIG. 13 through FIG. 15, the multi-chamber expandable interspinous process brace 1300 can include a superior spinous process pocket 1314 that is formed by a top portion of the central chamber 1302, a top portion of the first lateral chamber 1304, and a top portion of the second lateral chamber 1306. The multi-chamber expandable interspinous process brace 1300 can also include an inferior spinous process pocket 1316 that can be formed by a bottom portion of the central chamber 1302, a bottom portion of the first lateral chamber 1304, and a bottom portion of the second lateral chamber 1306.
  • [0100]
    Further, a superior spinous process engagement structure 1320 can extend from the central chamber 1304 within the superior spinous process pocket 1310. Also, an inferior spinous process engagement structure 1322 can extend from the central chamber 1304 within the inferior spinous process pocket 1310. In a particular embodiment, each of the spinous process engagement structures 1320, 1322 can be one or more spikes, one or more teeth, a combination thereof, or some other structure configured to engage a spinous process.
  • [0101]
    FIG. 13 through FIG. 15 indicate that the multi-chamber expandable interspinous process brace 1300 can be implanted between a superior spinous process 1400 and an inferior spinous process 1402. In a particular embodiment, the chambers 1302, 1304, 1306 can be inflated so the superior spinous process pocket 1314 can engage and support the superior spinous process 1400 and so the inferior spinous process pocket 1316 can engage and support an inferior spinous process 1402.
  • [0102]
    More specifically, the superior spinous process engagement structure 1320 can extend slightly into and engage the superior spinous process 1400. Also, the inferior spinous process engagement structure 1322 can extend slightly into and engage the inferior spinous process 1402. Accordingly, the spinous process engagement structures 1320, 1322, the spinous process pockets 1314, 1316, or a combination thereof can substantially prevent the multi-chamber expandable interspinous process brace 1300 from migrating with respect to the spinous processes 1400, 1402.
  • [0103]
    Also, in a particular embodiment, the multi-chamber expandable interspinous process brace 1300 can be movable between a deflated configuration, shown in FIG. 13, and one or more inflated configurations, shown in FIG. 14 and FIG. 15. In the deflated configuration, a distance 1410 between the superior spinous process pocket 1314 and the inferior spinous process pocket 1316 can be at a minimum. However, as one or more materials are injected into the chambers 1302, 1304, 1306 the distance 1410 between the superior spinous process pocket 1314 and the inferior spinous process pocket 1316 can increase.
  • [0104]
    Accordingly, the multi-chamber expandable interspinous process brace 1300 can be installed between a superior spinous process 1400 and an inferior spinous process 1402. Further, the multi-chamber expandable interspinous process brace 1300 can be expanded, e.g., by injecting one or more materials into the chambers 1302, 1304, 1306 in order to increase the distance between the superior spinous process 1400 and the inferior spinous process 1402.
  • [0105]
    Alternatively, a distractor can be used to increase the distance between the superior spinous process 1400 and the inferior spinous process 1402 and the multi-chamber expandable interspinous process brace 1300 can be expanded to support the superior spinous process 1400 and the inferior spinous process 1402. After the multi-chamber expandable interspinous process brace 1300 is expanded accordingly, the distractor can be removed and the multi-chamber expandable interspinous process brace 1300 can support the superior spinous process 1400 and the inferior spinous process 1402 to substantially prevent the distance between the superior spinous process 1402 and the inferior spinous process 1400 from returning to a pre-distraction value.
  • [0106]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1300 can be injected with one or more injectable biocompatible materials that remain elastic after curing. Further, the injectable biocompatible materials can include polymer materials that remain elastic after curing. Also, the injectable biocompatible materials can include ceramics.
  • [0107]
    For example, the polymer materials can include polyurethanes, polyolefins, silicones, silicone polyurethane copolymers, polymethylmethacrylate (PMMA), epoxies, cyanoacrylates, hydrogels, or a combination thereof. Further, the polyolefin materials can include polypropylenes, polyethylenes, halogenated polyolefins, or flouropolyolefins.
  • [0108]
    The hydrogels can include polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM), polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  • [0109]
    In a particular embodiment, the ceramics can include calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof. In an alternative embodiment, the injectable biocompatible materials can include one or more fluids such as sterile water, saline, or sterile air.
  • [0110]
    In a particular embodiment, the hardness of the material used to inflate the central chamber 1302 can be less than or equal to the hardness of the material used to inflate the first lateral chamber 1304 and the second lateral chamber 1306, i.e., after the materials used to inflate the central chamber 1302, the first lateral chamber 1304, and the second lateral chamber 1306 are cured. Alternatively, the viscosity of the material used to inflate the central chamber 1302 can be less than or equal to the viscosity of the material used to inflate the first lateral chamber 1304 and the second lateral chamber 1306. In a particular embodiment, certain or all of the injected materials can be cured or cross-linked in situ to form a solid interspinous process brace with non-uniform bulk properties.
  • [0111]
    FIG. 15 indicates that a tether 1500 can be installed around the multi-chamber expandable interspinous process brace 1300, after the multi-chamber expandable interspinous process brace 1300 is expanded as described herein. As shown, the tether 1500 can include a proximal end 1502 and a distal end 1504. In a particular embodiment, the tether 1500 can circumscribe the multi-chamber expandable interspinous process brace 1300 and the spinous processes 1400, 1402. Further, the ends 1502, 1504 of the tether 1500 can be brought together and one or more fasteners can be installed therethrough to connect the ends 1502, 1504. Accordingly, the tether 1500 can be installed in order to prevent the distance between the spinous processes 1400, 1402 from substantially increasing beyond the distance provided by the multi-chamber expandable interspinous process brace 1300 after it is expanded and to maintain engagement of the interspinous processes with the spinous process pockets 1314, 1316, engagement structures 1320, 1322, or a combination thereof.
  • [0112]
    In a particular embodiment, the tether 1500 can comprise a biocompatible elastomeric material that flexes during installation and provides a resistance fit against the inferior process. Further, the tether 1500 can comprise a substantially non-resorbable suture or the like.
  • Description of a Fifth Embodiment of a Multi-Chamber Expandable Interspinous Process Brace
  • [0113]
    Referring to FIG. 16 through FIG. 18, a fifth embodiment of a multi-chamber expandable interspinous process brace is shown and is generally designated 1600. As shown, the multi-chamber expandable interspinous process brace 1600 includes a central chamber 1602, a first lateral chamber 1604, and a second lateral chamber 1606.
  • [0114]
    In a particular embodiment, the central chamber 1602 can be generally vertically elongated. Also, in a particular embodiment, the first lateral chamber 1604 can be vertically elongated and can extend along a first side of the central chamber 1602. The second lateral chamber 1606 can also be vertically elongated and can extend along a second side of the central chamber 1602. Together, the central chamber 1602, the first lateral chamber 1604, and the second lateral chamber 1606 can be provided in a shape that can generally engage and/or stabilize at least one spinous process, such as, for example, the spinous processes of two adjacent vertebrae. In a particular embodiment, together, the chambers 1602, 1604 and 1606 can be generally H-shaped.
  • [0115]
    Further, in a particular embodiment, the chambers 1602, 1604, 1606 can be made from one or more expandable biocompatible materials. For example, the materials can be silicones, polyurethanes, polycarbonate urethanes, polyethylene terephthalate, silicone copolymers, polyolefins, or any combination thereof. Also, the chambers 1602, 1604, 1606 can be non-porous or micro-porous, e.g., for venting purposes.
  • [0116]
    As shown in FIG. 16, the central chamber 1602 can include a first injection tube 1608. The first lateral chamber 1604 can include a second injection tube 1610 and the second lateral chamber 1606 can include a third injection tube 1612. The injection tubes 1608, 1610, 1612 can be used to provide one or more injectable biocompatible material to the chambers 1602, 1604, 1606. In a particular embodiment, each of the central chamber 1602, the first lateral chamber 1604, and the second lateral chamber 1606 of the multi-chamber expandable interspinous process brace 1600 can be expanded from a respective deflated configuration, shown in FIG. 16, to one of a plurality of inflated configurations, shown in FIG. 17 and FIG. 18, up to a maximum inflated configuration. Further, after the chambers 1602, 1604, 1606 are inflated, or otherwise expanded, the injection tubes 1608, 1610, 1612 can be removed, as depicted in FIG. 18.
  • [0117]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1600 can include a first self-sealing valve (not shown) within the central chamber 1602, e.g., adjacent to the first injection tube 1608. Moreover, the multi-chamber expandable interspinous process brace 1600 can include a second self-sealing valve (not shown) within the first lateral chamber 1604, e.g., adjacent to the second injection tube 1610. The multi-chamber expandable interspinous process brace 1600 can also include a third self-sealing valve (not shown) within the second lateral chamber 1606. The self-sealing valves can prevent the chambers 1602, 1604, 1606 from leaking material after the chambers 1602, 1604, 1606 are inflated and the injection tubes 1608, 1610, 1612 are removed.
  • [0118]
    As illustrated in FIG. 16 through FIG. 18, central chamber 1602 of the multi-chamber expandable interspinous process brace 1600 can include a superior spinous process pocket 1614. The central chamber 1602 of the multi-chamber expandable interspinous process brace 1600 can also include an inferior spinous process pocket 1616. Further, a superior spinous process engagement structure 1620 can extend from the central chamber 1604 within the superior spinous process pocket 1610. Also, an inferior spinous process engagement structure 1622 can extend from the central chamber 1604 within the inferior spinous process pocket 1610. In a particular embodiment, each of the spinous process engagement structures 1620, 1622 can be one or more spikes, one or more teeth, a combination thereof, or some other structure configured to engage a spinous process.
  • [0119]
    FIG. 16 through FIG. 18 indicate that the multi-chamber expandable interspinous process brace 1600 can be implanted between a superior spinous process 1700 and an inferior spinous process 1702. In a particular embodiment, the chambers 1602, 1604, 1606 can be inflated so the superior spinous process pocket 1614 can engage and support the superior spinous process 1700 and so the inferior spinous process pocket 1616 can engage and support an inferior spinous process 1702.
  • [0120]
    More specifically, the superior spinous process engagement structure 1620 can extend slightly into and engage the superior spinous process 1700. Also, the inferior spinous process engagement structure 1622 can extend slightly into and engage the inferior spinous process 1702. Accordingly, the spinous process engagement structures 1620, 1622, the spinous process pockets 1614, 1616, or a combination thereof can substantially prevent the multi-chamber expandable interspinous process brace 1600 from migrating with respect to the spinous processes 1700, 1702.
  • [0121]
    Also, in a particular embodiment, the multi-chamber expandable interspinous process brace 1600 can be movable between a deflated configuration, shown in FIG. 16, and one or more inflated configurations, shown in FIG. 17 and FIG. 18. In the deflated configuration, a distance 1710 between the superior spinous process pocket 1614 and the inferior spinous process pocket 1616 can be at a minimum. However, as one or more materials are injected into the chambers 1602, 1604, 1606 the distance 1710 between the superior spinous process pocket 1614 and the inferior spinous process pocket 1616 can increase.
  • [0122]
    Accordingly, the multi-chamber expandable interspinous process brace 1600 can be installed between a superior spinous process 1700 and an inferior spinous process 1702. Further, the multi-chamber expandable interspinous process brace 1600 can be expanded, e.g., by injecting one or more materials into the chambers 1602, 1604, 1606 in order to increase the distance between the superior spinous process 1700 and the inferior spinous process 1702.
  • [0123]
    Alternatively, a distractor can be used to increase the distance between the superior spinous process 1700 and the inferior spinous process 1702 and the multi-chamber expandable interspinous process brace 1600 can be expanded to support the superior spinous process 1700 and the inferior spinous process 1702. After the multi-chamber expandable interspinous process brace 1600 is expanded accordingly, the distractor can be removed and the multi-chamber expandable interspinous process brace 1600 can support the superior spinous process 1700 and the inferior spinous process 1702 to substantially prevent the distance between the superior spinous process 1702 and the inferior spinous process 1700 from returning to a pre-distraction value.
  • [0124]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1600 can be injected with one or more injectable biocompatible materials that remain elastic after curing. Further, the injectable biocompatible materials can include polymer materials that remain elastic after curing. Also, the injectable biocompatible materials can include ceramics.
  • [0125]
    For example, the polymer materials can include polyurethanes, polyolefins, silicones, silicone polyurethane copolymers, polymethylmethacrylate (PMMA), epoxies, cyanoacrylates, hydrogels, or a combination thereof. Further, the polyolefin materials can include polypropylenes, polyethylenes, halogenated polyolefins, or flouropolyolefins.
  • [0126]
    The hydrogels can include polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM), polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  • [0127]
    In a particular embodiment, the ceramics can include calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof. In an alternative embodiment, the injectable biocompatible materials can include one or more fluids such as sterile water, saline, or sterile air.
  • [0128]
    In a particular embodiment, the hardness of the material used to inflate the central chamber 1602 can be less than or equal to the hardness of the material used to inflate the first lateral chamber 1604 and the second lateral chamber 1606, i.e., after the materials used to inflate the central chamber 1602, the first lateral chamber 1604, and the second lateral chamber 1606 are cured. Alternatively, the viscosity of the material used to inflate the central chamber 1602 can be less than or equal to the viscosity of the material used to inflate the first lateral chamber 1604 and the second lateral chamber 1606. In a particular embodiment, certain or all of the injected materials can be cured or cross-linked in situ to form a solid interspinous process brace with non-uniform bulk properties.
  • [0129]
    FIG. 18 indicates that a tether 1800 can be installed around the multi-chamber expandable interspinous process brace 1600, after the multi-chamber expandable interspinous process brace 1600 is expanded as described herein. As shown, the tether 1800 can include a proximal end 1802 and a distal end 1804. In a particular embodiment, the tether 1800 can circumscribe the multi-chamber expandable interspinous process brace 1600 and the spinous processes 1700, 1702. Further, the ends 1802, 1804 of the tether 1800 can be brought together and one or more fasteners can be installed therethrough to connect the ends 1802, 1804. Accordingly, the tether 1800 can be installed in order to prevent the distance between the spinous processes 1700, 1702 from substantially increasing beyond the distance provided by the multi-chamber expandable interspinous process brace 1600 after it is expanded and to maintain engagement of the interspinous processes with the spinous process pockets 1614, 1616, engagement structures 1620, 1622, or a combination thereof.
  • [0130]
    In a particular embodiment, the tether 1800 can comprise a biocompatible elastomeric material that flexes during installation and provides a resistance fit against the inferior process. Further, the tether 1800 can comprise a substantially non-resorbable suture or the like.
  • Description of a Sixth Embodiment of a Multi-Chamber Expandable Interspinous Process Brace
  • [0131]
    Referring to FIG. 19 through FIG. 21, a sixth embodiment of a multi-chamber expandable interspinous process brace is shown and is generally designated 1900. As shown, the multi-chamber expandable interspinous process brace 1900 includes an exterior chamber 1902, a first interior chamber 1904, and a second interior chamber 1906.
  • [0132]
    In a particular embodiment, the exterior chamber 1902 can be provided in a shape that can generally engage and/or stabilize at least one spinous process, such as, for example, the spinous processes of two adjacent vertebrae. In a particular embodiment, the exterior chamber 1902 can be generally H-shaped. Also, in a particular embodiment, the first interior chamber 1904 can be vertically elongated and can be disposed within a first side of the exterior chamber 1902. The second interior chamber 1906 can also be vertically elongated and can be disposed within a second side of the exterior chamber 1902.
  • [0133]
    Further, in a particular embodiment, the chambers 1902, 1904, 1906 can be made from one or more expandable biocompatible materials. For example, the materials can be silicones, polyurethanes, polycarbonate urethanes, polyethylene terephthalate, silicone copolymers, polyolefins, or any combination thereof. Also, the chambers 1902, 1904, 1906 can be non-porous or micro-porous, e.g., for venting purposes.
  • [0134]
    As shown in FIG. 19, the exterior chamber 1902 can include a first injection tube 1908. The first interior chamber 1904 can include a second injection tube 1910 and the second interior chamber 1906 can include a third injection tube 1912. The injection tubes 1908, 1910, 1912 can be used to provide one or more injectable biocompatible material to the chambers 1902, 1904, 1906. In a particular embodiment, each of the exterior chamber 1902, the first interior chamber 1904, and the second interior chamber 1906 of the multi-chamber expandable interspinous process brace 1900 can be expanded from a respective deflated configuration, shown in FIG. 19, to one of a plurality of inflated configurations, shown in FIG. 20 and FIG. 21, up to a maximum inflated configuration. Further, after the chambers 1902, 1904, 1906 are inflated, or otherwise expanded, the injection tubes 1908, 1910, 1912 can be removed, as depicted in FIG. 21.
  • [0135]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1900 can include a first self-sealing valve (not shown) within the exterior chamber 1902, e.g., adjacent to the first injection tube 1908. Moreover, the multi-chamber expandable interspinous process brace 1900 can include a second self-sealing valve (not shown) within the first interior chamber 1904, e.g., adjacent to the second injection tube 1910. The multi-chamber expandable interspinous process brace 1900 can also include a third self-sealing valve (not shown) within the second interior chamber 1906. The self-sealing valves can prevent the chambers 1902, 1904, 1906 from leaking material after the chambers 1902, 1904, 1906 are inflated and the injection tubes 1908, 1910, 1912 are removed.
  • [0136]
    As illustrated in FIG. 19 through FIG. 21, exterior chamber 1902 of the multi-chamber expandable interspinous process brace 1900 can include a superior spinous process pocket 1914. The exterior chamber 1902 of the multi-chamber expandable interspinous process brace 1900 can also include an inferior spinous process pocket 1916. Further, a superior spinous process engagement structure 1920 can extend from the exterior chamber 1904 within the superior spinous process pocket 1910. Also, an inferior spinous process engagement structure 1922 can extend from the exterior chamber 1904 within the inferior spinous process pocket 1910. In a particular embodiment, each of the spinous process engagement structures 1920, 1922 can be one or more spikes, one or more teeth, a combination thereof, or some other structure configured to engage a spinous process.
  • [0137]
    FIG. 19 through FIG. 21 indicate that the multi-chamber expandable interspinous process brace 1900 can be implanted between a superior spinous process 2000 and an inferior spinous process 2002. In a particular embodiment, the chambers 1902, 1904, 1906 can be inflated so the superior spinous process pocket 1914 can engage and support the superior spinous process 2000 and so the inferior spinous process pocket 1916 can engage and support an inferior spinous process 2002.
  • [0138]
    More specifically, the superior spinous process engagement structure 1920 can extend slightly into and engage the superior spinous process 2000. Also, the inferior spinous process engagement structure 1922 can extend slightly into and engage the inferior spinous process 2002. Accordingly, the spinous process engagement structures 1920, 1922, the spinous process pockets 1914, 1916, or a combination thereof can substantially prevent the multi-chamber expandable interspinous process brace 1900 from migrating with respect to the spinous processes 2000, 2002.
  • [0139]
    Also, in a particular embodiment, the multi-chamber expandable interspinous process brace 1900 can be movable between a deflated configuration, shown in FIG. 19, and one or more inflated configurations, shown in FIG. 20 and FIG. 21. In the deflated configuration, a distance 2010 between the superior spinous process pocket 1914 and the inferior spinous process pocket 1916 can be at a minimum. However, as one or more materials are injected into the chambers 1902, 1904, 1906 the distance 2010 between the superior spinous process pocket 1914 and the inferior spinous process pocket 1916 can increase.
  • [0140]
    Accordingly, the multi-chamber expandable interspinous process brace 1900 can be installed between a superior spinous process 2000 and an inferior spinous process 2002. Further, the multi-chamber expandable interspinous process brace 1900 can be expanded, e.g., by injecting one or more materials into the chambers 1902, 1904, 1906 in order to increase the distance between the superior spinous process 2000 and the inferior spinous process 2002.
  • [0141]
    Alternatively, a distractor can be used to increase the distance between the superior spinous process 2000 and the inferior spinous process 2002 and the multi-chamber expandable interspinous process brace 1900 can be expanded to support the superior spinous process 2000 and the inferior spinous process 2002. After the multi-chamber expandable interspinous process brace 1900 is expanded accordingly, the distractor can be removed and the multi-chamber expandable interspinous process brace 1900 can support the superior spinous process 2000 and the inferior spinous process 2002 to substantially prevent the distance between the superior spinous process 2002 and the inferior spinous process 2000 from returning to a pre-distraction value.
  • [0142]
    In a particular embodiment, the multi-chamber expandable interspinous process brace 1900 can be injected with one or more injectable biocompatible materials that remain elastic after curing. Further, the injectable biocompatible materials can include polymer materials that remain elastic after curing. Also, the injectable biocompatible materials can include ceramics.
  • [0143]
    For example, the polymer materials can include polyurethanes, polyolefins, silicones, silicone polyurethane copolymers, polymethylmethacrylate (PMMA), epoxies, cyanoacrylates, hydrogels, or a combination thereof. Further, the polyolefin materials can include polypropylenes, polyethylenes, halogenated polyolefins, or flouropolyolefins.
  • [0144]
    The hydrogels can include polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM), polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  • [0145]
    In a particular embodiment, the ceramics can include calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof. In an alternative embodiment, the injectable biocompatible materials can include one or more fluids such as sterile water, saline, or sterile air.
  • [0146]
    In a particular embodiment, the hardness of the material used to inflate the exterior chamber 1902 can be less than or equal to the hardness of the material used to inflate the first interior chamber 1904 and the second interior chamber 1906, i.e., after the materials used to inflate the exterior chamber 1902, the first interior chamber 1904, and the second interior chamber 1906 are cured. Alternatively, the viscosity of the material used to inflate the exterior chamber 1902 can be less than or equal to the viscosity of the material used to inflate the first interior chamber 1904 and the second interior chamber 1906. In a particular embodiment, certain or all of the injected materials can be cured or cross-linked in situ to form a solid interspinous process brace with non-uniform bulk properties.
  • [0147]
    FIG. 21 indicates that a tether 2100 can be installed around the multi-chamber expandable interspinous process brace 1900, after the multi-chamber expandable interspinous process brace 1900 is expanded as described herein. As shown, the tether 2100 can include a proximal end 2102 and a distal end 2104. In a particular embodiment, the tether 2100 can circumscribe the multi-chamber expandable interspinous process brace 1900 and the spinous processes 2000, 2002. Further, the ends 2102, 2104 of the tether 2100 can be brought together and one or more fasteners can be installed therethrough to connect the ends 2102, 2104. Accordingly, the tether 2100 can be installed in order to prevent the distance between the spinous processes 2000, 2002 from substantially increasing beyond the distance provided by the multi-chamber expandable interspinous process brace 1900 after it is expanded and to maintain engagement of the interspinous processes with the spinous process pockets 1914, 1916, engagement structures 1920, 1922, or a combination thereof.
  • [0148]
    In a particular embodiment, the tether 2100 can comprise a biocompatible elastomeric material that flexes during installation and provides a resistance fit against the inferior process. Further, the tether 2100 can comprise a substantially non-resorbable suture or the like.
  • [0000]
    Description of a Method of Treating a Spine
  • [0149]
    Referring to FIG. 22, a method of treating a spine is shown and commences at block 2200. At block 2200, a patient can be secured on an operating table. Depending on the surgical approach to be used, the patient can be secured in a prone position for a posterior approach, a supine position for an anterior approach, a lateral decubitus position for a lateral approach, or another position well known in the art. At block 2202, the spine can be exposed in order to expose adjacent spinous processes. Further, at block 2204, a surgical retractor system can be installed to keep a surgical field open.
  • [0150]
    Moving to block 2206, a superior vertebra and inferior vertebra can be distracted. In a particular embodiment, the superior vertebra and inferior vertebra can be distracted using a distractor. At block 2208, a distance between the adjacent spinous processes can be measured. Thereafter, at block 2210 it is determined whether the distraction is correct, e.g., has the superior vertebra and inferior vertebral been distracted such that a distance between the adjacent spinous processes has reached a value that a surgeon has deemed therapeutic. For example, the superior vertebra and inferior vertebra can be distracted in order to reduce impingement on a nerve root.
  • [0151]
    If the distraction is not correct, the method can return to block 2206 and the superior vertebra and inferior vertebra can be further distracted. Conversely, if the distraction is correct, the method can move to block 2212 and a multi-chamber expandable interspinous process brace can be installed between a superior spinous process and an inferior spinous process. Thereafter, at block 2214, each chamber within the multi-chamber expandable interspinous process brace can be inflated.
  • [0152]
    Moving to block 2216, each chamber within the multi-chamber expandable interspinous process brace can be sealed. In a particular embodiment, each chamber within the multi-chamber expandable interspinous process brace can be sealed by curing the material within the each chamber of the multi-chamber expandable interspinous process brace. Alternatively, a plug, a dowel, or another similar device can be used to seal each chamber within the multi-chamber expandable interspinous process brace. Further, a one-way valve can be incorporated into each chamber of the multi-chamber expandable interspinous process brace and can allow material to be injected into each chamber of the multi-chamber expandable interspinous process brace, but prevent the same material from being expelled from each chamber of the multi-chamber expandable interspinous process brace.
  • [0153]
    At block 2218, each injection tube can be removed from the multi-chamber expandable interspinous process brace. Moreover, at block 2220, the material within one or more chambers of the multi-chamber expandable interspinous process brace can be cured. In a particular embodiment, the material within the multi-chamber expandable interspinous process brace can cure naturally, i.e., under ambient conditions, in situ. Alternatively, the material within one or more of the multi-chamber expandable interspinous process brace can be cured or crosslinked in situ using an energy source. For example, the energy source can be a light source that emits visible light, infrared (IR) light, or ultra-violet (UV) light. Further, the energy source can be a heating device, a radiation device, or other mechanical device. Alternatively or in addition, the material in one or more of the chambers can be crosslinked by introducing a chemical crosslinking agent into the chamber before removing the injection tube from the chamber.
  • [0154]
    Proceeding to block 2222, a tether can be installed around the multi-chamber expandable interspinous process brace. The tether can be installed in order to prevent a distance between the superior spinous process and the inferior spinous process from increasing substantially beyond the distance provided by the multi-chamber expandable interspinous process brace. At block 2224, the surgical area can be irrigated. At block 2226, the distractor can be removed. Also, at block 2228, the retractor system can be removed. Further, at block 2230, the surgical wound can be closed. The surgical wound can be closed by simply allowing the patient's skin to close due to the elasticity of the skin. Alternatively, the surgical wound can be closed using sutures, surgical staples, or any other suitable surgical technique well known in the art. At block 2232, postoperative care can be initiated. The method can end at state 2232.
  • CONCLUSION
  • [0155]
    With the configuration of structure described above, the multi-chamber expandable interspinous process brace provides a device that can be used to treat a spine and substantially alleviate or minimize one or more symptoms associated with disc degeneration, facet joint degeneration, or a combination thereof. For example, the multi-chamber expandable interspinous process brace can be installed between adjacent spinous processes in order to support the spinous processes and maintain them at or near a predetermined distance therebetween.
  • [0156]
    As described above, the multi-chamber expandable interspinous process brace can include two or three chambers. Alternatively, the multi-chamber expandable interspinous process brace can include four chambers, five chambers, six chambers, seven chambers, eight chambers, nine chambers, ten chambers, etc. Also, the chambers can be separate chambers, as described above, or the chambers can be interconnected to allow material to flow therebetween. The chambers can be inflated sequentially or simultaneously.
  • [0157]
    The above-disclosed subject matter is to be considered illustrative, and not restrictive, and the appended claims are intended to cover all such modifications, enhancements, and other embodiments that fall within the true spirit and scope of the present invention. Thus, to the maximum extent allowed by law, the scope of the present invention is to be determined by the broadest permissible interpretation of the following claims and their equivalents, and shall not be restricted or limited by the foregoing detailed description.

Claims (29)

  1. 1. A multi-chamber expandable interspinous process brace, comprising:
    at least two chambers wherein each of the at least two chambers is configured to receive an injectable biocompatible material and wherein the multi-chamber expandable interspinous process brace is movable between a deflated configuration and an inflated configuration in which the multi-chamber expandable interspinous process brace is configured to engage and support a superior spinous process and an inferior spinous process.
  2. 2. The multi-chamber expandable interspinous process brace of claim 1, wherein the at least two chambers are inflatable to distract the superior spinous process and the inferior spinous process.
  3. 3. The multi-chamber expandable interspinous process brace of claim 2, further comprising a superior spinous process pocket established by at least one of the at least two chambers, wherein the superior spinous process pocket is configured to engage the superior spinous process.
  4. 4. The multi-chamber expandable interspinous process brace of claim 3, further comprising an inferior spinous process pocket established by at least one of the at least two chambers, wherein the inferior spinous process pocket is configured to engage the inferior spinous process.
  5. 5. The multi-chamber expandable interspinous process brace of claim 4, further comprising a superior spinous process engagement structure extending into the superior spinous process pocket.
  6. 6. The multi-chamber expandable interspinous process brace of claim 5, further comprising an inferior spinous process engagement structure extending into the inferior spinous process pocket.
  7. 7. The multi-chamber expandable interspinous process brace of claim 4, further comprising a tether configured to be installed around the multi-chamber expandable interspinous process brace, the superior spinous process and the inferior spinous process.
  8. 8. The multi-chamber expandable interspinous process brace of claim 7, wherein the tether is configured to substantially bind the superior spinous process within the superior spinous process pocket and substantially bind the inferior spinous process within the inferior spinous process bracket.
  9. 9. The multi-chamber expandable interspinous process brace of claim 1, wherein the injectable biocompatible material comprises a polymer, a ceramic, or a combination thereof.
  10. 10. The multi-chamber expandable interspinous process brace of claim 9, wherein the polymer comprises a polyurethane, a polyolefin, a silicone, a silicone polyurethane copolymer, polymethylmethacrylate, an epoxy, a cyanoacrylate, a hydrogel, or a combination thereof.
  11. 11. The multi-chamber expandable interspinous process brace of claim 10, wherein the polymer in a first chamber has a first degree of crosslinlcing and the polymer in a second chamber has a second degree of crosslinking higher than the first degree of crosslinking.
  12. 12. The multi-chamber expandable interspinous process brace of claim 10, wherein the polyolefin comprises a polypropylene, a polyethylene, a halogenated polyolefin, a flouropolyolefin, or a combination thereof.
  13. 13. The multi-chamber expandable interspinous process brace of claim 10, wherein the hydrogel comprises polyacrylamide (PAAM), poly-N-isopropylacrylamine (PNIPAM), polyvinyl methylether (PVM, polyvinyl alcohol (PVA), polyethyl hydroxyethyl cellulose, poly (2-ethyl) oxazoline, polyethyleneoxide (PEO), polyethylglycol (PEG), polyacrylacid (PAA), polyacrylonitrile (PAN), polyvinylacrylate (PVA), polyvinylpyrrolidone (PVP), or a combination thereof.
  14. 14. The multi-chamber expandable interspinous process brace of claim 9, wherein the ceramic comprises calcium phosphate, hydroxyapatite, calcium sulfate, bioactive glass, or a combination thereof.
  15. 15. The multi-chamber expandable interspinous process brace of claim 1, wherein the injectable biocompatible material comprises a fluid.
  16. 16. The multi-chamber expandable interspinous process brace of claim 15, wherein the fluid comprises sterile water, saline, or sterile air.
  17. 17. The multi-chamber expandable interspinous process brace of claim 1, wherein the at least two chambers comprises:
    an exterior chamber; and
    an interior chamber, wherein a hardness of a material within the interior chamber is greater than or equal to a hardness of a material within the exterior chamber.
  18. 18-19. (canceled)
  19. 20. The multi-chamber expandable interspinous process brace of claim 1, wherein the at least two chambers comprises:
    a central chamber,
    a superior chamber along a top of the central chamber; and
    an inferior chamber along a bottom of the central chamber, wherein a hardness of a material within the superior chamber and the inferior chamber is greater than or equal to a hardness of a material within the central chamber.
  20. 21-22. (canceled)
  21. 23. The multi-chamber expandable interspinous process brace of claim 1, wherein the at least two chambers comprises:
    a central chamber,
    a first lateral chamber along a first side of the central chamber; and
    a second lateral chamber along a second side of the central chamber, wherein a hardness of a material within the first lateral chamber and the second lateral chamber is greater than or equal to a hardness of a material within the central chamber.
  22. 24-25. (canceled)
  23. 26. The multi-chamber expandable interspinous process brace of claim 1, wherein the plurality of chambers comprises:
    an exterior chamber;
    a first interior chamber within a first side of the exterior chamber; and
    a second interior chamber within a second side of the exterior chamber, wherein a hardness of a material within the first interior chamber and the second interior chamber is greater than or equal to a hardness of a material with the exterior chamber.
  24. 27-28. (canceled)
  25. 29. A method of treating a spine, comprising:
    installing a multi-chamber expandable interspinous process brace between a superior spinous process and an inferior spinous process; and
    inflating at least two chambers within the multi-chamber expandable interspinous process brace to support the superior spinous process and the inferior spinous process.
  26. 30-35. (canceled)
  27. 36. A method of treating a spine, comprising:
    distracting a superior spinous process and an inferior spinous process;
    installing a multi-chamber expandable interspinous process brace between a superior spinous process and an inferior spinous process; and
    inflating at least two chambers within the multi-chamber expandable interspinous process brace to support the superior spinous process and the inferior spinous process.
  28. 37. A kit for field use, comprising:
    a multi-chamber expandable interspinous process brace comprising at least two chambers configured to receive an injectable biocompatible material; and
    an injectable biocompatible material.
  29. 38. A kit for field use, comprising:
    a multi-chamber expandable interspinous process brace comprising at least two chambers configured to receive an injectable biocompatible material;
    an injectable biocompatible material; and
    a tether configured to circumscribe the multi-chamber expandable interspinous process brace, a superior spinous process, and an inferior spinous process.
US11413587 2006-04-28 2006-04-28 Multi-chamber expandable interspinous process brace Abandoned US20070270823A1 (en)

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PCT/US2007/067077 WO2007127677A1 (en) 2006-04-28 2007-04-20 Multi-chamber expandable interspinous process brace
EP20070761008 EP2012693B1 (en) 2006-04-28 2007-04-20 Multi-chamber expandable interspinous process brace
US12795883 US8221465B2 (en) 2006-04-28 2010-06-08 Multi-chamber expandable interspinous process spacer
US13105792 US20110213418A1 (en) 2006-04-28 2011-05-11 Multi-chamber expandable interspinous process spacer

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US12795883 Expired - Fee Related US8221465B2 (en) 2006-04-28 2010-06-08 Multi-chamber expandable interspinous process spacer
US13105792 Abandoned US20110213418A1 (en) 2006-04-28 2011-05-11 Multi-chamber expandable interspinous process spacer

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US20110213418A1 (en) 2011-09-01 application
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WO2007127677A1 (en) 2007-11-08 application

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