WO2004096306A1 - 生体材料製骨材・セメント複合体及びセメント硬化体 - Google Patents
生体材料製骨材・セメント複合体及びセメント硬化体 Download PDFInfo
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- WO2004096306A1 WO2004096306A1 PCT/JP2004/005841 JP2004005841W WO2004096306A1 WO 2004096306 A1 WO2004096306 A1 WO 2004096306A1 JP 2004005841 W JP2004005841 W JP 2004005841W WO 2004096306 A1 WO2004096306 A1 WO 2004096306A1
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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
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/001—Use of materials characterised by their function or physical properties
- A61L24/0042—Materials resorbable by the body
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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
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/0005—Ingredients of undetermined constitution or reaction products thereof
-
- 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
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/02—Surgical adhesives or cements; Adhesives for colostomy devices containing inorganic materials
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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
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/04—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials
Definitions
- the present invention relates to a new material for artificial bone that enables further development of a new bone regeneration treatment technology currently being researched and developed on an international scale.
- a new type of cement composite that incorporates aggregate particles made of compatible materials, more specifically, self-hardening calcium phosphate cement with more than 51 vol% of calcium phosphate-based ceramic or biodegradable plastic aggregate particles Ready-mixed concrete composite (unhardened concrete) obtained by mixing water with this, a concrete-like hardened concrete obtained by hydrating and hardening the above cement part, and related technologies It is about art.
- the present invention is a bone regeneration treatment technique, which is expected to be most practically used in the art in the field of bone regeneration and bone reconstruction for the purpose of bone regeneration and formation of an implant holding bed.Fracture repair, osteoporosis. It is useful as an injection for a site, a filler for filling a gap between a metal artificial material and a bone matrix, and a complex that can be suitably used as a drug carrier or a cell culture carrier.
- the present invention comprises, in the field of artificial bone formation technology, a calcium phosphate-based ceramic or biodegradable plastic-based biocompatible material having a specific form prepared by an arbitrary method, and a self-hardening calcium phosphate cement.
- the present invention provides a new aggregate and a use form thereof, and the aggregate exerts a function of improving the pumpability of the cement paste and the mechanical strength of the hardened cement.
- the amount of calcium phosphate cement required can be reduced. Therefore, the present invention provides a low-cost treatment method. By mixing and curing the particles ′ cement composite by an appropriate method, it is useful as a concrete-like dense body and a porous body of any shape that can be easily and reliably produced.
- the bone filling material used for filling or the like is desirably a material that binds and replaces autologous bone.
- the bone filling material used for filling or the like is desirably a material that binds and replaces autologous bone.
- calcium phosphate ceramics such as hydroxyapatite and mono-TCP
- biodegradable plastics such as polylactic acid have been used as biomaterials that bind to and replace autologous bone.
- less invasive injection therapy has been attracting attention in bone regeneration treatment using the above calcium phosphate-based material.
- infusion therapy is a treatment method in which artificial bone is non-invasively injected and placed in a target region using a syringe or the like.
- the material used for the injection therapy is desirably a fluid paste.
- a self-hardening type calcium phosphate cement in which two or more kinds of calcium phosphate mixtures in which a hardening can be expected are mixed with an appropriately selected kneading liquid to form a paste-like calcium phosphate cement (for example, Patent Documents 1 to 12).
- Patent Documents 1 to 12 for example, Patent Documents 1 to 12
- Non-Patent Document 1 a self-hardening type calcium phosphate cement in which two or more kinds of calcium phosphate mixtures in which a hardening can be expected are mixed with an appropriately selected kneading liquid to form a paste-like calcium phosphate cement.
- Patent Documents 1 to 12 for example, Patent Documents 1 to 12
- Non-Patent Document 1 Today's self-hardening calcium phosphate cements have the problem that the strength after hardening is not only low, the hardening is not good in the presence of body fluids and blood, and
- Patent Document 1 US Pat. No. 4,518,430
- Patent Document 2 JP-A-64-3745
- Non-Patent Document 1 P.D.Costantino et al., ArchOtolaryngoI Head Neck Surg 117 (1991) 379-384.
- the present inventors in view of the above-described conventional technology, can drastically solve various problems found in the above-described conventional technology in the field of bone regeneration treatment technology.
- biomaterial bone with a specific particle size was obtained. It has been found that the intended purpose can be achieved by mixing 51 to 90 vol% of the material particles in the self-curing calcium phosphate cement to form a composite, thereby completing the present invention.
- the present invention contains a biomaterial aggregate particle used for bone regeneration treatment.
- the purpose is to provide self-hardening calcium phosphate cement (aggregate particles' cement composite), that is, a new artificial bone material (concrete) composed of biomaterial.
- Another object of the present invention is to provide an uncured concrete paste obtained by mixing the above aggregate particles' cement composite and a liquid component such as water.
- Another object of the present invention is to provide a hardened cement body obtained by hydrating and hardening the cement part of the above aggregate particles' cement composite.
- Another object of the present invention is to provide a method for controlling the compressive strength of a self-hardening calcium phosphate cement hydrate by mixing the biomaterial aggregate particles into a self-hardening calcium phosphate cement. Is what you do.
- the present invention provides a method for controlling the pumpability of a self-curing calcium phosphate cement paste by mixing the biomaterial aggregate particles into a self-curing calcium phosphate cement paste, and the above-mentioned aggregate particles' cement composite.
- the purpose is to provide a method for efficiently pumping the water.
- the present invention for solving the above-mentioned problems includes the following technical means.
- Aggregate particles containing aggregate particles made of a biocompatible material 'cement composite and (a) the aggregate particles are made of calcium phosphate ceramics or biodegradable boutique, (b) ) Aggregate particle size 151 zm to 5 mm, (c) the aggregate particle content in the cement is 51 to 90 vol%, and (d) the cement is a self-hardening calcium phosphate cement. Characteristic aggregate particles' cement composite.
- Biodegradable plastic power The aggregate according to the above (1), which is one or a mixture of two or more selected from polydalicholic acid, polylactic acid, a copolymer of polydalicholic acid and polylactic acid, and polydioxanone. Particle ⁇ Cement composite. (4) The aggregate particle-cement composite according to the above (1), wherein the shape of the aggregate particle is spherical, tetrapod-shaped, cone-shaped, tetrahedral, or hexahedral.
- An injectable / filler for living body comprising the aggregate particle 'cement composite according to any one of (1) to (9) or the uncured concrete paste according to (10).
- An injection filling material discharging apparatus characterized in that a discharge port is provided in a part of the tube filling according to (12).
- a method for controlling the pumpability of a self-hardening calcium phosphate cement paste comprising adding 51 to 90 vol% of biomaterial aggregate particles to a self-hardening calcium phosphate cement.
- a fiber-reinforced cured product obtained by curing the uncured concrete paste according to the above (10) together with a single wire or a stranded wire made of pure titanium, a titanium alloy, or a biodegradable plastic.
- the self-hardening calcium phosphate cement is preferably, for example, calcium monophosphate, dicalcium phosphate (DCP), dicalcium phosphate dihydrate (DCPD), ⁇ -type tricalcium phosphate ( ⁇ -TCP) And quaternary calcium phosphate (TeCP).
- DCP dicalcium phosphate
- DCPD dicalcium phosphate dihydrate
- ⁇ -TCP ⁇ -type tricalcium phosphate
- TeCP quaternary calcium phosphate
- the present invention is not limited to these, and can be used as long as they are substantially the same as or similar to these.
- one selected from these, or a combination of compositions that can be expected to be hardened by hydration of two or more has a force S used as a self-hardening calcium phosphate cement, preferably, A combination of TeCP and DCPD, or a combination of ⁇ -TCP and DCPD is desirable.
- the raw material may be a natural mineral, but is preferably synthesized by various wet methods and dry methods from the viewpoints of engraftment and substitution with autologous bone and cytotoxicity.
- a suitable amount of any pharmaceutically acceptable component can be mixed with these raw materials.
- these include, for example, Hi-TCP containing lwt% magnesium and TeCP containing 0.5wt% sodium.
- the raw material is a powder having a BET value of about 1 to 300 m 2 Zg. However, it is not limited to these.
- the component of the biomaterial aggregate particles is calcium phosphate or biodegradable plastic.
- the calcium phosphate raw material preferably, for example, hydroxyapata , Carbonate apatite, fluorapatite, chlorapatite, -TCP, ⁇ -TCP, calcium metaphosphate, tetracalcium phosphate, calcium hydrogen phosphate, calcium hydrogen phosphate dihydrate.
- the biodegradable plastic raw material preferably, for example, polydaricholic acid, polylactic acid (poly-D-lactic acid, poly-L-lactic acid, poly-D, L-lactic acid, poly-DL-lactic acid); Copolymers and polydioxanone are exemplified.
- an aggregate of calcium phosphate single crystal for example, an aggregate of hydroxyapatite, monetite, and brushite is exemplified.
- the present invention is not limited to these and can be used in the same manner as those which are substantially equivalent to or similar to them. In the present invention, one kind selected from these, or a mixture of two or more kinds is used.
- the aggregate particles are preferably a symmetrically shaped granular molded product of the above-mentioned aggregate material.
- the shape of the aggregate particles is, for example, spherical, tetrapod-shaped, cone-shaped, tetrahedral, or hexahedral, and preferably spherical.
- a method in which a desired calcium phosphate powder suspended in sodium alginate is dropped into a coagulating liquid containing a polyvalent metal ion to form a spherical shape may be used.
- the concentrations of calcium phosphate powder and sodium alginate are desirably 5-90 wt% and 1-150 wt%, respectively.
- the concentrations of the biodegradable plastic powder and sodium alginate are desirably 5-190 wt% and 1-150 wt%, respectively.
- the heating and melting temperature of the biodegradable plastic is preferably 170 to 200 ° C.
- a desired phosphoric acid component is added to the biodegradable plastic, it is preferable to granulate the desired calcium phosphate to an average particle size of 300 ⁇ m or less, and to add and mix the biodegradable plastic in a molten state.
- the specific gravity of the material particles is preferably, for example, the specific gravity of the self-hardening calcium phosphate cement.
- the ratio is adjusted from 1/10 to 10 times, but by adjusting the specific gravity of the aggregate particles as described above, the aggregate particles can be uniformly dispersed in the self-hardening calcium phosphate and the cement paste. However, those having an appropriate specific gravity can be used.
- the aggregate particles after molding may or may not be adjusted to a desired size and sphericity by cutting or the like.
- the size of the aggregate particles is preferably not more than 1/5 of the minor axis length of the target bone defect, but is not limited to this, and the aggregate particles of an appropriate size are not limited. We can use S.
- the aggregate particles-cement composite is obtained by mixing the above aggregate particles with a self-hardening calcium phosphate cement in a range of 51 to 90 vol%, controlling the mechanical properties of the self-hardening calcium phosphate cement hydrate hardening body, It is also produced by controlling the pumpability of the self-setting calcium phosphate cement paste. If the amount of the aggregate particles is less than 51 vol%, segregation of the aggregate particles may be caused, and desired mechanical properties may not be imparted to the hardened cement body. If the amount exceeds 90 vol%, the fluidity may be significantly lost.
- the aggregate particles / cement composite prepared as described above with water and forming the cement portion into a paste, an aggregate particle having a pumping property capable of being filled and injected can be obtained.
- the aggregate particles may be mixed with a powdered self-hardening calcium phosphate cement, or may be mixed with water and mixed with a self-hardening calcium phosphate cement paste that has become a paste.
- the water used when the self-curing calcium phosphate cement is formed into a paste can contain a pharmaceutically acceptable component.
- self-hardening calcium phosphate cement using a 1 to 50 wt% aqueous solution of one or a mixture of two or more selected from collagen, hyanoreonic acid, sodium chondroitin sulfate, sodium sodium succinate, and physiological saline. May be kneaded to form a paste.
- the cement hardened body is obtained.
- 1 to 60 vol% of bubbles are taken in, whereby a porous cured body can be produced.
- uncured By hardening the concrete paste together with a single wire or a stranded wire made of pure titanium, a titanium alloy, or a biodegradable plastic, a fiber-reinforced cured product can be produced.
- the hardened cement obtained by the present invention has a concrete-like structure and can have a compressive strength of up to 300 MPa by appropriately selecting the type, size, shape and content of the aggregate. Also, by appropriately selecting the size, shape, and content of the aggregate, the aggregate particles / cement composite can be smoothly discharged through a syringe needle or the like. In addition, aggregate particles having a particle size of 151 zm to 5 mm can be easily pumped with an appropriate push rod or the like. It can be pumped to the target area through a syringe needle or the like. Therefore, it becomes possible to form a hardened cement body in the target area by minimally invasive injection.
- the particle size is outside these ranges, and the aggregate particles have a particle size exceeding the upper limit of the above range, a large-diameter needle is required for injection. Invasion increases. If the aggregate particles have a particle size below the lower limit of the above range, it becomes difficult to catch the particles with a push rod or the like, and the pumpability is significantly reduced. However, even for aggregate particles having a particle size smaller than the lower limit of the above range, it can be brought into a state capable of being pumped by appropriately mixing with aggregate particles having a particle size within the above range.
- the above-mentioned aggregate particle / cement composite preferably includes, for example, a step of molding the aggregate, a step of mixing the aggregate with calcium phosphate cement, a step of mixing the same with water (when forming a paste), Aggregate particles are produced by the process of completing the hydration hardening of the cement composite (when obtaining a hardened cement).
- the invention is not limited to these methods.
- the aggregate particles and the cement composite obtained by the present invention can be used as a ready-mixed concrete (remicone, ready-mixed concrete) consisting of biomaterials. Higher than the compressive strength of hardened calcium phosphate cement.
- aggregate particles having a particle diameter of 151 xm or more can be easily pumped with an appropriate push rod or the like.Therefore, the aggregate particles' cement composite can be used regardless of the fluidity and viscosity of the cement part. Can be discharged from a syringe needle or the like. That is, the aggregate particles / cement composite can be non-invasively injected into the bone defect. Therefore, it is possible to percutaneously fill the bone defect with the aggregate particles ′ cement composite.
- the tensile strength of the cement particles of the present invention can be improved by, for example, combining a single wire, a stranded wire, and a cage made of biodegradable plastic, titanium, and a titanium alloy.
- Power S can.
- a fiber-reinforced cured product having improved strength against a load perpendicular to the orientation direction can be obtained.
- an appropriate method which is not limited to these is used.
- the aggregate particles' cement composite filled in the bone defect acquires a predetermined strength after hydration and hardening, and quickly recovers the load holding function in the bone defect. Aggregate and hydrated hardened cement are replaced by autologous bone over time.
- a calcium phosphate molded body having a desired shape By filling the aggregate particles ′ cement composite into a mold having a desired shape and hydrating and hardening, a calcium phosphate molded body having a desired shape can be obtained. By using a porous aggregate or by introducing air into the cement at the time of kneading the aggregate with the cement, a porous calcium phosphate molded article can be obtained.
- the aggregate particles' cement composite of the present invention is obtained by sterilizing and packing the aggregate particles and the cement in a ratio in which the desired effect is exhibited, or by dividing the aggregate particles and the cement into appropriate amounts respectively. Be converted to For example, a mixture of cement and aggregate particles at a concentration of 80% can be enclosed in an appropriate bag or package, sterilized, and packed to obtain a specified product. Also, the aggregate particles can be commercialized alone. In this case, the aggregate particles are used by being mixed with a commercially available self-hardening calcium phosphate cement at an appropriate ratio.
- a filling material for living body composed of the above-mentioned aggregate particles / cement composite or uncured concrete paste is filled into a tube having one or both ends closed to form a tube filler.
- the tube include a laminated tube having a screw thread and a tube having the same effect as the laminated tube.
- a liquid component for example, a cement kneading solution
- a discharge port may be provided in a part of the tube filling material to form an injection filler discharge device, and the tube filling material may be loaded into a syringe to form an injection filler discharge device (injector).
- an arbitrary drug component can be supported on the aggregate particles and the aggregate particles of the cement composite and the cement.
- the drug component for example, an anticancer agent, examples include anticancer agents, anti-inflammatory agents, BMP and the like.
- the present invention is not limited thereto, and can carry an appropriate drug component.
- the aggregate particles / cement composite of the present invention When the aggregate particles / cement composite of the present invention is hydrated and hardened, it is ideally a hardened body in which the aggregates are bonded with cement. That is, a hardened body having a concrete-like structure is constructed. Thereby, the above-mentioned hardened body exceeds the hardened body made of cement alone with respect to the maximum compressive load.
- the aggregate particles' cement composite of the present invention exhibits various characteristics depending on the mixing ratio, shape and preparation method of the aggregate particles. For example, the compressive strength of the cured product can be increased by increasing the strength of the aggregate particles or by adding a high blending ratio of kashimi.
- the small-diameter aggregate particles By using the small-diameter aggregate particles, it is possible to realize a smooth discharge property and a pumping property from an injection needle or the like.
- a porous aggregate particle When a porous aggregate particle is used, a desired drug can be carried on the aggregate particle.
- the hardened body When aggregate particles with excellent machinability are used, the hardened body also has good machinability, so the aggregate particles hardened after filling the bone defect or mother bone that needs reinforcement, Ability to form implant implant holes and implant self-tapping metal implants. Since it is possible to reduce the amount of self-hardening calcium phosphate cement that requires time until complete hardening, the maximum strength can be achieved early.
- the aggregate particles according to the present invention and the cement composite are used as an injection for a bone defect filled with blood or the like, the load holding function of the bone defect can be quickly restored as compared with an injection therapy using only cement. Can be.
- a self-hardening type calcium phosphate cement (aggregate particles′cement composite) containing aggregate particles made of a biomaterial, which enables a new bone regeneration treatment, that is, a biomaterial It is possible to provide a new material for artificial bone (concrete).
- an uncured concrete paste obtained by kneading the aggregate particle-cement composite with an appropriate aqueous solution.
- a hardened cement body having a concrete-like structure obtained as a result of hydration and hardening of the cement portion of the unhardened concrete paste.
- Self-hardening type calcium phosphate comprising biomaterial aggregate particles
- Biomaterial aggregate particles can be mixed with cement to control the compressive strength of self-hardening calcium phosphate cement hydrated hardened material.
- Self-hardening calcium phosphate cement pace (6)
- the above-mentioned hydrated hardened body can be made of porous or machinable ceramics by appropriately selecting the aggregate by mixing it into the self-hardening type calcium phosphate cement paste.
- the paste can be injected and filled into a living body using a syringe, the paste is useful as a living body injection and filler for vertebral compression fractures, etc.
- a 1% by weight aqueous sodium alginate solution was mixed with 10% by weight of hydroxyapatite (HA) adjusted to a particle size of 50 ⁇ m or less to form a uniform slurry.
- the slurry was formed into a spherical shape by dropping four portions of the slurry into a lwt% aqueous solution of calcium chloride salt.
- the spherical particles molded as described above were dried at 60 ° C for 12 hours, and then sintered at 1250 ° C for 1 hour to obtain spherical aggregate particles with a diameter of 1 ⁇ 0.2 (Fig. 1). .
- the above-mentioned aggregate particles are mixed with a commercially available self-hardening type calcium phosphate cement paste so as to have a volume of about 65vol%, molded into a cylindrical shape having a diameter of 5x5, and left in the air at room temperature for 24 hours.
- a hardened cement body (bone concrete) containing aggregate particles was prepared (Fig. 2).
- a commercially available self-curing calcium phosphate cement paste alone was molded into a cylindrical shape of ⁇ 5 ⁇ 5, and left in the air at room temperature for 24 hours to obtain a cured product of only cement.
- a compression test was performed on the hardened body of only bone concrete and cement produced by the above method. As a result, the compressive strength of the bone concrete was 3-4 times that of the hardened cement alone.
- Example 2 A 1% by weight aqueous sodium alginate solution was mixed with a hydroxyapatite (HA) prepared to a particle size of 50 ⁇ m or less so as to be 10% by weight to obtain a uniform slurry.
- the slurry was formed into a spherical shape by dropping the slurry at a rate of 3 / l into an lwt% aqueous solution of calcium chloride salt. After drying the spherical HA molded as above at 60 ° C for 12 hours, sintering it at 1250 ° C for 1 hour, and moving it inside a circular chamber coated with # 800 diamond abrasive grains on its inner wall.
- HA hydroxyapatite
- the spherical aggregate particles were mixed with the cement paste so as to be 80 vol% to obtain a syringe filling.
- the syringe filling was able to be discharged from an injection needle having an inner cylinder diameter of 5.
- the mixture of cement paste and spherical particles in the injection needle could be pumped by a polyethylene rod having a diameter of less than 5.
- a 1% by weight aqueous sodium alginate solution was mixed with 10% by weight of hydroxyapatite (HA) adjusted to a particle size of 50 ⁇ m or less to obtain a uniform slurry.
- the slurry was formed into a spherical shape by dropping two portions of the slurry into an lwt% aqueous solution of calcium chloride.
- the spheres thus formed were freeze-dried and then sintered at 1250 ° C for 1 hour to obtain spherical aggregate particles having a diameter of 1.0 ⁇ 0.2 mm.
- the spherical aggregate particles were added to the cement paste at 60 ⁇ 1.
- a mixture so that the / o, and molded into a cylindrical shape phi 5 chi 15, in the atmosphere, and left for 24 hours at room temperature and hardened cement body containing aggregate particles (bone concrete).
- the above-mentioned bone concrete could be easily processed without being damaged by an electrodeposition diamond tool or the like.
- a through-hole could be provided by a ⁇ 3 electrodeposited diamond bar.
- a self-tapping screw could be fixed to the ⁇ 3 through hole produced as described above.
- Example 4 [0027] A 1 wt% aqueous sodium alginate solution was mixed with a hydroxyapatite (HA) prepared by spray drying to a particle size of about 50 ⁇ m so as to be 10 wt% to obtain a uniform slurry. The slurry was formed into a spherical shape by dropping 31 parts each into an lwt% calcium chloride aqueous solution. The spherical particles molded as described above were dried at 60 ° C. for 12 hours, and then sintered at 1250 ° C. for 1 hour to obtain porous spherical aggregate particles having a diameter of 0.8 ⁇ 0.2.
- HA hydroxyapatite
- the above-mentioned self-setting calcium phosphate cement paste mixed with the above-mentioned aggregate particles at a volume of 80 vo 1% was kneaded so as to incorporate air bubbles into the paste, and the CT data of the bone defect was obtained based on the mixture.
- a porous calcium phosphate having a shape of a bone defect site was obtained. Macropores of about 100 / im and micropores of several microns were distributed in the porous calcium phosphate.
- the above macropores were connected by micropores in adjacent aggregate particles, forming a communication hole network.
- Example 1 The aggregate particles prepared in Example 1 were mixed with a commercially available self-hardening calcium phosphate cement powder so as to have a volume of about 55vol%, filled in a laminate tube having a screw, and sealed with the screw (Fig. 3a). .
- the cement kneading liquid was injected from the sealing portion into the above-mentioned laminate tube using a syringe, and the cement was made into a paste in the laminate tube to form a tube filling (Fig. 3b).
- a 16G injection needle was attached to the screw opening of the tube filling adjusted as described above, and used as an injector (Fig. 3c).
- the aggregate aggregate cement paste contained therein could be easily discharged by pressing the tube.
- the filled tube was loaded into a syringe and used as an injector (Fig. 3d).
- the aggregate composite cement pace containing the same is used in the same manner as a normal syringe. could be discharged.
- the present invention relates to a calcium phosphate-based ceramic or a biodegradable plastic-based biocompatible material having a specific form prepared by an arbitrary method in the field of artificial bone formation technology. And a new aggregate comprising self-hardening calcium phosphate cement and a new use form thereof.
- a self-hardening type containing biomaterial aggregate particles enabling new bone regeneration treatment
- calcium phosphate cement aggregate particles′cement composite
- aggregate particles′cement composite that is, a new material for artificial bone (concrete) composed of a biomaterial.
- an uncured concrete paste obtained by kneading the above aggregate particles ′ cement composite with an appropriate aqueous solution is possible.
- a hardened cement body having a concrete-like structure obtained as a result of hydration hardening of the cement portion of the unhardened concrete paste By mixing the biomaterial aggregate particles into the self-hardening calcium phosphate cement, the compressive strength of the self-hardening calcium phosphate cement hydrate can be controlled. By mixing the biomaterial aggregate particles into the self-hardening calcium phosphate cement paste, the self-hardening calcium phosphate cement paste can be imparted with pumpability.
- the hydrated cured body can be made into a porous body or a machinable ceramic by appropriately selecting an aggregate.
- the paste can be injected and filled into a living body using a syringe, and is therefore useful as a filling and filling agent for living bodies for vertebral compression fractures and the like.
- the paste exhibits sufficient strength for holding a metal implant after hydration and hardening, and thus can form a mother bed sufficient for implanting a metal implant. Since the amount of self-hardening calcium phosphate cement that requires time until complete hardening can be reduced, the load holding function at the bone defect can be quickly restored. The amount of expensive commercially available self-hardening calcium phosphate cement can be reduced, and the cost of bone regeneration treatment can be reduced.
- FIG. 1 shows the appearance of spherical aggregate particles having a diameter of 1 ⁇ 0.2.
- FIG.2 A tomographic image of bo-con concrete taken by micro X-ray CT.
- FIG. 3 Tube filling of self-curing calcium phosphate cement powder mixed with aggregate particles (A), a schematic diagram of the process of converting the aggregate composite cement content in the tube into a paste (b), with a 16G syringe needle attached to the screw opening of the tube filling to form an injector. It is a schematic diagram (c) and a schematic diagram (d) of a state in which a tube filling is loaded into a syringe to form an injector.
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JP2003127616A JP4535691B2 (ja) | 2003-05-02 | 2003-05-02 | 生体材料製骨材・セメント複合体及びセメント硬化体 |
JP2003-127616 | 2003-05-02 |
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FR2885512B1 (fr) * | 2005-05-10 | 2007-08-10 | Biocoral Inc | Seringue pour bio-materiau |
JP5538493B2 (ja) * | 2006-01-16 | 2014-07-02 | 株式会社アイ・ティー・オー | 生体内組織用創傷治癒用フィルム及び生体内接着用フィルム |
JP5173199B2 (ja) * | 2006-01-16 | 2013-03-27 | 株式会社アイ・ティー・オー | 創傷治癒用高分子組成物 |
FR2932687B1 (fr) | 2008-06-23 | 2010-09-17 | Centre Nat Rech Scient | Biomateriaux a base de phosphates de calcium. |
JP6145366B2 (ja) * | 2013-09-10 | 2017-06-07 | HOYA Technosurgical株式会社 | リン酸カルシウム硬化性組成物 |
DE102015209007A1 (de) | 2015-05-15 | 2016-11-17 | Aesculap Ag | Knochenersatzmaterialien, Verfahren zur Herstellung eines Knochenersatzmaterials sowie medizinische Kits zur Behandlung von Knochendefekten |
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JPH07206489A (ja) * | 1991-11-22 | 1995-08-08 | Maria G Boltong | りん酸カルシウムセメント組成物、その製造方法、及びその使用方法 |
JPH08276003A (ja) * | 1995-04-07 | 1996-10-22 | Terumo Corp | 硬組織修復材料および埋入型医療用具 |
JP2001518359A (ja) * | 1997-10-07 | 2001-10-16 | ドクトル.ハー.ツェー.ロベルト マシーズ スティフツング | 外科用水硬セメント |
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JP2576404B2 (ja) * | 1994-04-22 | 1997-01-29 | 三菱マテリアル株式会社 | 骨欠損部、骨空隙部及び骨吸収部充填材の製造法 |
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Patent Citations (3)
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JPH07206489A (ja) * | 1991-11-22 | 1995-08-08 | Maria G Boltong | りん酸カルシウムセメント組成物、その製造方法、及びその使用方法 |
JPH08276003A (ja) * | 1995-04-07 | 1996-10-22 | Terumo Corp | 硬組織修復材料および埋入型医療用具 |
JP2001518359A (ja) * | 1997-10-07 | 2001-10-16 | ドクトル.ハー.ツェー.ロベルト マシーズ スティフツング | 外科用水硬セメント |
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Title |
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MIRTCHI A.A. ET AL: "Calcium phosphate cements: action of setting regulators on the properties of the beta-tricalcium phosphate-monocalcium phosphate cements", BIOMATERIALS, vol. 10, no. 9, 1989, pages 634 - 638, XP000081742 * |
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JP2004329458A (ja) | 2004-11-25 |
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