WO2002034111A2 - In situ bioprosthetic filler and methods, particularly for the in situ formation of vertebral disc bioprosthetics - Google Patents
In situ bioprosthetic filler and methods, particularly for the in situ formation of vertebral disc bioprosthetics Download PDFInfo
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- WO2002034111A2 WO2002034111A2 PCT/US2001/032632 US0132632W WO0234111A2 WO 2002034111 A2 WO2002034111 A2 WO 2002034111A2 US 0132632 W US0132632 W US 0132632W WO 0234111 A2 WO0234111 A2 WO 0234111A2
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- Prior art keywords
- cavity
- vertebral disc
- components
- bioprosthetic
- reactable
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
- A61L27/3691—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment characterised by physical conditions of the treatment, e.g. applying a compressive force to the composition, pressure cycles, ultrasonic/sonication or microwave treatment, lyophilisation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/22—Polypeptides or derivatives thereof, e.g. degradation products
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/22—Polypeptides or derivatives thereof, e.g. degradation products
- A61L27/227—Other specific proteins or polypeptides not covered by A61L27/222, A61L27/225 or A61L27/24
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3604—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3641—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the site of application in the body
- A61L27/3645—Connective tissue
- A61L27/3654—Cartilage, e.g. meniscus
- A61L27/3658—Intervertebral discs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
- A61F2002/4445—Means for culturing intervertebral disc tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
- A61F2002/445—Intervertebral disc tissue harvest sites
Definitions
- the present invention relates generally to bioprosthetics.
- the present invention is related to bioprosthetics formed in situ.
- the vertebral disc is a collagenous spacer positioned between the vertebral bones of the spinal column.
- the disc generically consists of a tough fibrillar outer annulus (annulus fibrosus) and a highly hydrated gelatinous core (nucleus pulposus).
- the vertebral disc serves as a shock absorber to dissipate the energy of impact loading on the back, as well as a joint, allowing flexion and extension of the human torso.
- DDD Degenerative disc disease
- Degeneration of vertebral disc function in the lumbar portion of the spine is the leading cause of debilitating low back pain in adults over the age of 35.
- Degenerative disc disease is characterized by a gradual collapse of the vertebral disc due to dehydration of the nucleus pulposus, or by a bulging of the annulus fibrosus. DDD may also precipitate the formation of fissures within the annulus that allows extrusion of the disc nucleus (disc hemiatio ⁇ ) resulting in a sudden collapse in the disc height and the potential for nerve root and/or spinal cord compression. Disc herniation may also result due to trauma related over compression of the spine, such as a heavy sitting fall.
- Chronic diffuse low back pain results from irritation of pain receptors in the outer third of the disc annulus and surrounding soft tissues as the disc collapses. Radicular pain results from direct compression of the affected nerve root by extruded or bulging disc tissue. Aggressive and extensive physical therapy and drug treatments are the first line treatments for debilitating back pain. In the absence of acceptable pain resolution, surgical intervention is indicated.
- the patent literature discloses several apparati for the replacement of an entire disc (i.e., prosthetic vertebral disc), whereby the damaged disc is removed and a device is anchored to the vertebral bone below and above the damaged disc.
- the ultimate goal of such a design concept is to maintain or regain the mobility of the native vertebra-disc-vertebra motion segment. Varying degrees of mobility have been claimed for different types of mechanical disc replacements. The following is a non-exhaustive list of such U.S.
- Patent disclosures 1 USP 4,309,777 to Patil; USP 5,865,845 to Thalgott; USP 5,827,328 to Buttermann; USP 5,865,846 to Bryan et al; USP 4,759,766 to Buettner-Jantz et al.; US 5,071 ,437 to Steffe; USP 4,911 ,718 to Lee et al.; and USP 4,714,469 to Kenna.
- the utility of these prior design proposals has been principally limited by an inability to adequately anchor the flexible prosthetic disc to the bony vertebra.
- devices that may, in addition, contain openings through their walls to allow bone growth through the device, enable the motion segment to be fused with the vertebral spacing maintained.
- These open or tubular devices may be constructed of metallic alloys traditional to implantable medical devices (e.g., stainless steel, titanium and titanium alloys), carbon fiber reinforced engineering thermoplastics (e.g., polyetheretherketones), or machined human cortical bone.
- Another general technique for the preservation of vertebral body separation is to replace the removed disc nuclear tissue with non-fusing, non-rigid materials.
- One prior proposal suggests using a bladder that can be filled with liquid to restore disc height (see, USP 3,875,595 to Froning).
- One other prior proposal is disclosed in USP 5,534,028 to Bao et al, where a pre-cast pre-shaped hydrogel in placed into the void. Variations on the type of device disclosed in Bao et al '028 are likewise disclosed in
- USP 6,022,376 the device shown in USP 6,022,376 is inserted into tunnels drilled into the disc as a dehydrated hydrogel resin, and is allowed to rehydrate and swell once it is inserted. The swelling holds the device in place while preventing the collapse of the denucleated disc. However, the device is neither chemically nor mechanically fixated in place.
- the present invention relates to bioprosthetic devices comprised of an exterior biological tissue member which at least partly defines a cavity, and a proteinaceous biopolymer which fills the cavity, and intercalates is chemically bound (linked) to the surrounding biological tissue member.
- the bioprosthetic device is a bioprosthetic vertebral disc having a fibrillar outer annulus which surrounds and defines an interior cavity and is formed by removal of at least a substantial portion of the natural gelatinous core therefrom.
- the cavity defined by the fibrillar outer annulus may then be filled with a flowable biopolymeric material which is then allowed to at least partly solidify in situ (e.g., most preferably by in situ cross-linkage reaction) to form a proteinaceous biopolymer within the cavity.
- a flowable biopolymeric material which is then allowed to at least partly solidify in situ (e.g., most preferably by in situ cross-linkage reaction) to form a proteinaceous biopolymer within the cavity.
- the flowable biopolymeric material is most preferably a liquid mixture liquid mixture comprised of human or animal-derived protein material and a di- or polyaldehyde.
- the liquid mixture may then react to form a cross-linked biopolymer in situ within the cavity thereby forming a bioprosthetic device therein.
- the liquid mixture may be formed in advance of being introduced into the cavity, or may be formed simultaneously during introduction into the cavity.
- FIGURE which schematically depicts a portion of a patient's vertebral column showing a vertebral disc bioprosthetic in accordance with the present invention interposed between adjacent vertebrae.
- bioprosthetic device and like terms mean a combination comprised of a biological tissue member and a proteinaceous biopolymer which is chemically bound (linked) to the tissue of the tissue member.
- the accompanying drawing FIGURE shows a segment of a patient's vertebral column VC wherein vertebral disc bioprosthetics 10 in accordance with the present invention are interposed between adjacent ones of the individual vertebrae V.
- the vertebral disc bioprosthetics 10 essentially include the fibrillar outer annulus 10-1 of the patient's natural vertebral disc following removal of the gelatinous core.
- the fibrillar outer annulus 10-1 thus bounds and defines an inner cavity into which a proteinaceous biopolymer 10-2 is injected in situ.
- the proteinaceous biopolymer (usually referred to hereinafter more simply as the "biopolymer”) 10-2 thus fills completely the void space left following removal of the natural gelatinous core of the patient's natural vertebral disc.
- the biopolymer 10-2 thus acts as a shock-absorber of sorts similar to the natural functions attributable to the removed gelatinous core.
- any suitable proteinaceous biopolymer may be employed in the practice of the present invention.
- the term "proteinaceous biopolymer” and like terms mean a polymeric or copolymeric material which contains one or more units in the polymer chain comprised of natural, synthetic or sequence-modified proteins or polypeptides, and mixtures and blends of such polymeric and/or copolymeric materials.
- biopolymer 10-2 that may be employed in the practice of this invention is a cross-linked reaction product of a two part mixture initially comprised of:
- Part A a water-soluble proteinaceous material of about 27-53% by weight of the mixture, and
- Part B di- or polyaldehydes present in a weight ratio of one part by weight to every 20-60 parts of protein present by weight in the mixture and water, optionally containing non-essential ingredients to make up the balance of the composition.
- Part A of the mixture is most preferably substantially an aqueous solution of a proteinaceous material of human or animal origin.
- Albumins including ovalbumins are preferred proteins, and serum albumins of human or animal origin are particularly preferred.
- the proteinaceous material may be a purified protein or a mixture in which the proteins such as serum albumins are the predominant ingredients.
- the solid mixtures obtained by dehydration of blood plasma or serum, or of commercial solutions of stabilized plasma proteins can be used to prepare Part A.
- These mixtures generally referred to as plasma solids or serum solids, are known to contain albumins as their major ingredients, of the order of 50-90%.
- plasma solids or serum solids are known to contain albumins as their major ingredients, of the order of 50-90%.
- the term "plasma" refers to whole blood from which the corpuscles have been removed by centrifugation.
- serum refers to plasma which has additionally been treated to prevent agglutination by removal of its fibrinogen and/or fibrin, or by inhibiting the fibrin clot formation through addition of reagents, such as citrate or EDTA.
- reagents such as citrate or EDTA.
- the proteinaceous material may also contain an effective amount of hemoglobin.
- Part B is substantially an aqueous solution of di- or polyaldehydes.
- di- or polyaldehydes A wide range of these substances exist, and their usefulness is restricted largely by availability and by their solubility in water.
- aqueous glyoxal ethandial
- glutaraldehyde penentandial
- Water soluble mixtures of di- and polyaldehydes prepared by oxidative cleavage of appropriate carbohydrates with periodate, ozone or the like are also useful.
- Glutaraldehyde is the preferred dialdehyde ingredient of Part B.
- Parts A and B When Parts A and B are brought together, the resultant product rapidly hardens to a strong, flexible, leathery or rubbery material within a short time of mixing, generally on the order of 15-30 seconds.
- the most preferred material for use in the present invention is commercially available from CryoLife, Inc. of Kennesaw, Georgia under the registered trademark "BIOGLUE”. (See also, USP 5,385,606, the entire content of which is expressly incorporated hereinto by reference.)
- the two components A and B noted above are either premixed and then applied, or simultaneously mixed and delivered through an in-line mixing/dispensing tip during the filling of the tissue-defined cavity.
- the resulting biomaterial is a hydrogel that adheres to the surrounding tissue, intercalates into the voids of the surrounding tissues, is space filling, and is mechanically and biologically stable for some time.
- the material may be solid or sponge-like in appearance. Furthermore, it may contain organic or inorganic salts or other particulate matter to modify the physical properties of the resulting bioprosthetic device.
- the biopolymer 10-2 will exhibit compressive strengths of at least 300 kPa (preferably between about 300 to about 600 kPa) and compressive moduli of 2.5 MPa, and creep moduli of 1 .0 MPa.
- the ultimate compressive strength of the biopolymer 10-2 can be adjusted by altering the composition of the protein and cross-linker components and/or through the addition of various fillers.
- the proteinaceous biopolymer that may be employed in the practice of the present invention may be include as on reactable component a natural, synthetic or sequence-modified (i.e., so- called "engineered") polypeptides (e.g., as disclosed more fully in USP 6,018,030; USP 5,374,431 ; USP 5,606,019;or USP 5,817,303, incorporated fully by reference herein) .
- a natural, synthetic or sequence-modified polypeptides e.g., as disclosed more fully in USP 6,018,030; USP 5,374,431 ; USP 5,606,019;or USP 5,817,303, incorporated fully by reference herein
- albumin it will be understood by those in this art that other reactable components may be employed satisfactorily.
- Reactable synthetic polymeric components namely, those which contain functional groups to cause cross-linking (e.g.
- polyethylene-glycol polymers derivatized with electrophilic and nucleophilic groups such as amine, succinimidyl, anhydride, thiol
- electrophilic and nucleophilic groups such as amine, succinimidyl, anhydride, thiol
- bioprosthetic vertebral discs of the present invention exhibit flexibility comparable to the biologically natural vertebral disc. More specifically, the bioprosthetic vertebral discs of the present invention exhibit flexibility comparable to the biologically natural vertebral disc after being subjected to at least about 5 million cycles of a cyclic load of about 0.85 MPa
- the biopolymer 10-2 can be "engineered” to suit specific end uses.
- the biopolymer may include fibrous or particulate reinforcement (“filler”) material, provided it is biocompatible.
- the reinforcing fibers may be used in the form of a continuous length of single fibers (i.e., monofilaments) or a yarn, roving or rope of multiple filaments.
- the reinforcing media may be in the form of staple fibers of predetermined lengths which are spun into yarns, rovings and/or ropes of desired denier and continuous length.
- the mono- or multifilamentary reinforcing materials may also be in the form of woven or non-woven fabric structures. Suffice it to say here, that virtually any physical form of fibrous reinforcing material may be satisfactorily employed in the practice of the present invention.
- the reinforcing material may also be in the form of particulates, such as synthetic or natural organic and inorganic particulate reinforcement materials.
- particulates such as synthetic or natural organic and inorganic particulate reinforcement materials.
- Some representative examples of such particulates include calcium carbonate, calcium phosphate, hydroxyapatite bone chips, ceramic particles and the like.
- Example 1 A formulation formed of a protein solution (serum albumin) and a cross linker (gluteraldehyde) was contained in the separate chambers of a delivery device. When the device is triggered, the two components are expelled from their respective chambers into a mixing tip that combines the two solutions and mixes them as they travel over the static mixing elements present in the tip.
- a medical needle was attached to the mixing tip and the formulation injected into the distal space between the vertebra of an explanted pig spine.
- the tip can be attached to a needle, catheter, or other hollow tubular device for delivery, for example. After 30 seconds, the needle was withdrawn from the injection site. The material that was injected had polymerized in place and did not exude out of the needle hole. After 2 minutes, the disc-vertebra plate was dissected and the presence of the biomaterial seen.
- Example 2 Bovine calf spines were obtained from a commercial slaughterhouse and cleaned by blunt and sharp dissection to expose the vertebral bodies and the discs. A 4 mm hole was made into the anterior face of the disc and the drill bit allowed to enter to the center of the nucleus. The nuclear material was removed using surgical forceps and curettes. The hollow space was filled with the formulation described in Example 1. The material that was injected polymerized in place and did not exude out of the hole. After 2 minutes the disc-vertebra plate was dissected and the presence of the biomaterial seen.
- Example 3 Bovine calf spines were obtained from a commercial slaughterhouse and cleaned by blunt and sharp dissection to expose the vertebral bodies and the discs. The top and bottom of the vertebral bodies were cut parallel to each other at mid-height using a miter box to yield a bone/disc/bone motion segment. A 4 mm hole was made into the anterior face of the disc and the drill bit allowed to enter into the center of the nucleus. The nuclear material was removed using surgical forceps and curettes. The hollow space was filled with the formulation described in Example 1 . The material that was injected had polymerized in place and did not exude out of the hole.
- the construct could be compressed by hand in the front-back and left-right axes, indicating flexibility was retained after repair of this segment. Then, the construct was placed in a biomaterials testing device (Instron electromechanical test station) and compressed repeatedly to a load of 700 N to condition the construct. Thereafter, a constant load of 700 N was applied to measure compressive creep. The load was held for 10 min. During this time, the polymerized material did not exit from the distal space or the hole. A force of 700 N is the published literature value for the load a lumbar spinal disc experiences when a person of average built is standing upright. The experiment was repeated on 5 separate samples.
- a biomaterials testing device Instron electromechanical test station
- the motion segment height was measured before removal of the nucleus, after removal of the nucleus, after filling with the biomaterial, and after loading and releasing the load. It was found that (1 ) the removal of the nucleus reduced the overall height of the material, as well as the compressibility, (2) the filling with the biomaterial restored the disc height and the compressibility.
- Example 4 A disc of biomaterial formed by injecting a volume of material with the formulation described in Example 1 into a cavity mold was compressed for 100 and 1000 cycles at a compression rate of 100 mm/min between a minimum stress of 200 kPa and a maximum stress of either 470 or 800 kPa (equivalent to a normal lumbar disc, cross sectional area of 1500 mm 2 , loaded between 300 N and 700 or 1200 N).
- the disc element did not exhibit fracture, permanent deformation, or demonstrate a loss of hydration (by mass loss analysis).
- a force of 1200 N is the published literature value for the compressive load a lumbar spinal disc experiences when a person of average built flexes forward.
- Example 5 Bovine calf spines were obtained and prepared as described in Example 3.
- the nucleus pulposus was accessed either from an anterior or a postero lateral direction.
- the constructs were then placed under a cyclic load of 0.85 MPa at 5 Hz and the load applied for >5 million cycles. During this time, the constructs were kept in physiological saline solution containing a non-fixative biocidal agent.
- the constructs were removed and the disc sliced parallel to the end plates to observe the status of the implants. The implant present in the cavity created by the removal of the nucleus pulposus, was intact and flexible.
- Example 6 Samples of the biomaterial were formed as described in Example 4. The biomaterial was then placed under a cyclic load of 0.5
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU1538702A AU1538702A (en) | 2000-10-24 | 2001-10-24 | In situ bioprosthetic filler and methods, particularly for the in situ formationof vertebral disc bioprosthetics |
DE60143804T DE60143804D1 (en) | 2000-10-24 | 2001-10-24 | BIOPROTHETIC FILLER AND METHODS, ESPECIALLY FOR THE FORMATION OF BANCH BIOPROTHESIS IN SITU |
AU2002215387A AU2002215387B2 (en) | 2000-10-24 | 2001-10-24 | In situ bioprosthetic filler and methods, particularly for the in situ formation of vertebral disc bioprosthetics |
EP01984004A EP1328220B1 (en) | 2000-10-24 | 2001-10-24 | Bioprosthetic filler and methods, particularly for the in situ formation of vertebral disc bioprosthetics |
CA002422884A CA2422884C (en) | 2000-10-24 | 2001-10-24 | In situ bioprosthetic filler and methods, particularly for the in situ formation of vertebral disc bioprosthetics |
JP2002537171A JP4202749B2 (en) | 2000-10-24 | 2001-10-24 | In-situ bioartificial filler and method for in-situ formation of bioartificial intervertebral disc in particular |
AT01984004T ATE494014T1 (en) | 2000-10-24 | 2001-10-24 | BIOPROSTHETIC FILLERS AND METHODS, IN PARTICULAR FOR THE FORMATION OF INTERVERTAL DISC BIOPROStheses IN SITU |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24245700P | 2000-10-24 | 2000-10-24 | |
US60/242,457 | 2000-10-24 |
Publications (2)
Publication Number | Publication Date |
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WO2002034111A2 true WO2002034111A2 (en) | 2002-05-02 |
WO2002034111A3 WO2002034111A3 (en) | 2003-01-16 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2001/032632 WO2002034111A2 (en) | 2000-10-24 | 2001-10-24 | In situ bioprosthetic filler and methods, particularly for the in situ formation of vertebral disc bioprosthetics |
Country Status (9)
Country | Link |
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US (4) | US20020049498A1 (en) |
EP (1) | EP1328220B1 (en) |
JP (1) | JP4202749B2 (en) |
AT (1) | ATE494014T1 (en) |
AU (2) | AU1538702A (en) |
CA (1) | CA2422884C (en) |
DE (1) | DE60143804D1 (en) |
ES (1) | ES2358498T3 (en) |
WO (1) | WO2002034111A2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006528672A (en) * | 2003-05-12 | 2006-12-21 | コリオニックス | Insoluble globin injectable implants |
EP1416946A4 (en) * | 2000-11-07 | 2009-10-28 | Cryolife Inc | Expandable foam-like biomaterials and methods |
WO2011056528A3 (en) * | 2009-10-27 | 2011-07-07 | Spine Wave, Inc. | Radiopaque injectable nucleus hydrogel compositions |
WO2012148850A2 (en) * | 2011-04-26 | 2012-11-01 | Spine Wave, Inc. | Radiopaque injectable nucleus hydrogel compositions |
Families Citing this family (97)
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JP4202749B2 (en) | 2008-12-24 |
DE60143804D1 (en) | 2011-02-17 |
EP1328220A4 (en) | 2009-08-19 |
AU2002215387B2 (en) | 2005-09-29 |
CA2422884A1 (en) | 2002-05-02 |
US20050102030A1 (en) | 2005-05-12 |
US20080058942A1 (en) | 2008-03-06 |
US7621954B2 (en) | 2009-11-24 |
ATE494014T1 (en) | 2011-01-15 |
JP2004532656A (en) | 2004-10-28 |
EP1328220A2 (en) | 2003-07-23 |
AU1538702A (en) | 2002-05-06 |
US7621959B2 (en) | 2009-11-24 |
ES2358498T3 (en) | 2011-05-11 |
CA2422884C (en) | 2009-05-19 |
US20070093902A1 (en) | 2007-04-26 |
EP1328220B1 (en) | 2011-01-05 |
US7896920B2 (en) | 2011-03-01 |
US20020049498A1 (en) | 2002-04-25 |
WO2002034111A3 (en) | 2003-01-16 |
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