182 results about "Titanium implant" patented technology

The invention discloses a preparation method of a biomedical porous pure-titanium implant material. The method comprises the steps of S1, constructing a three-dimensional model of the implant material through drawing software, slicing through layering software, conveying the obtained two-dimensional section information to a computer control system of an SLM former, and providing a laser scanning route; S2, paving a layer of titanium powder being 30 to 70 microns in thickness on a workbench of the SLM former through a powder paving layer; S3, performing selective laser meting for the titanium powder through a laser beam under the conditions that the power is 90 to 100W, the scanning spacing is 0.10 to 0.20mm, and the scanning speed is 275 to 540mm/s to obtain a layer of sections of the implant material, and synchronously lowering down the worktable in a distance equal to the height of a layer of powder; S4, repeating the steps 2 and 3 until the three-dimensional model of the implant material is formed; S5, automatically stopping working by the SLM former, cooling the three-dimensional model to reach room temperature, then performing sand blasting to obtain the porous pure-titanium implant material; the three-dimensional model is a porous structural mode using a tetrakaidecahedron unit as a dot matrix and formed by repeatedly accumulating the tetrakaidecahedron units.

The process of forming fluoric stepped hole structure on the surface of pure titanium dental implant includes sand blasting the pure titanium implant, etching in mixed solution of sulfuric acid and hydrochloric acid, etching in mixed solution of hydrofluoric acid and nitric acid, soaking in sodium fluoride solution and other steps. The pure titanium dental implant with stepped hole surface structure has excellent bone tissue compatibility, capacity of raising the combination strength of the implant to the bone tissue and raised long term clinical success rate of dental implant.

A 3D metal artifacts correction technique corrects the streaking artifacts generated by titanium implants or other similar objects. A cone-beam computed tomography system is utilized to provide 3D images. A priori information (such as the shape information and the CT value) of high density sub-objects is acquired and used for later artifacts correction. An optimization process with iterations is applied to minimize the error and result in accurate reconstruction images of the object.

The invention relates to a three-dimensional printing technology based method for forming a medical porous pure titanium implant, comprising the following steps of: (1) mixing pure titanium powder with water-soluble binding materials, and grinding; (2) conveying the pure titanium powder to a platform, and inputting a designed titanium implant CAD file into matching software of three-dimensional printing equipment to direct the three-dimensional printing equipment to work; spraying binders to the titanium powder to form a two-dimensional plane by a printing head, , descending a work table to process a next layer after finishing processing one layer, and piling layer by layer for forming till a processed article is sprayed and formed completely; after the processed article is formed, standing the processed article, sweeping unbounded powder to obtain an initially forming article, and then sintering so as to obtain the medical porous pure titanium implant. The method is simple, has low cost and is suitable for industrialized production; the obtained medical porous pure titanium implant has high matching degree with a natural bone and can be better combined with a bone tissue due to a formed porous structure.

The invention relates to an application of femto-second laser in the surface treatment of the pure titanium implanting material, belonging to the technical field of application of laser in the material surface treatment. The application method comprises the following steps: in the air, the femto-laser impulse is in normal incidence and focused right on the top of the lump pure titanium implanting material which is ground and dried, a light spot with a radius of 5um is formed at the surface of the pure titanium implanting material, the femto-laser processing parameters are defined as follows: the impulse repeat frequency is 1 kHz, the single impulse power is from 5 to 200 micro joule, the impulse width is 50 femtosecond, the impulse center wavelength is 800 nanometer, the line interval of the laser processing is between 10 to 100 micron, the laser scanning speed is between 0.5 to 1.2 mm/sec, the laser polarization direction is regulated to be parallel to the laser scanning direction, the femto-laser scans the whole surface of the pure titanium implanting material, a titanium based biomedical material with an oxide layer generated on the titanium surface, even roughness, and a pattern of strips, holes, grooves or the combined pattern thereof formed on the pure titanium implanting material is made.

This invention relates to the synthesis of new tooth or bone from an encapsulated biological agent such as a growth factor or stem cells contained within a hollow and porous biocompatible vehicle such as a titanium implant placed (implanted) within the body of a host animal such as a human.

The invention relates to a surface treatment process of a bioactive metallic titanium implant having a multistage micro-pit structure, and the surface treatment process comprises the following steps: pretreatment, sandblasting treatment, acid etching treatment, sputtering treatment and glow discharge treatment; according to the surface treatment process, a multistage micro-pit three-dimensional structure having a bioactive tantalum coating is formed on the surface of the metallic titanium implant, so that the binding strength between the tantalum coating and the metallic titanium implant is very good, the tantalum coating is not easy to shed, shedding of the tantalum coating during or after an implantation process is avoided, the biological activity of the metal titanium implant can be improved, bone deposition of the surface of the metal titanium implant is accelerated, the tissue healing time is shortened, and through the formation of synostosis between the metal titanium implant and a surrounding bone tissue, the effect of improvement of the stability of the metal titanium implant can be achieved.

The invention relates to a surface mount method of mineralized collagen gradient coating for medical titanium implant. Based on the effect of voltage and electrolyte composition on in-situ biomineralization self-assembly of collagen in electrolyte, permineralized calcium phosphate layer, mineralized collagen layer and unmineralized pure collagen layer are assembled from the titanium substrate upward in profile by electrochemical codeposition technology. The components and structure of the above product are similar to those of natural bones. The product of good biocompatibility and biological responsiveness can accelerate the osteointegration of implanted area and shorten the period of treatment. The strong binding force between the coating and the titanium substrate prevents the occurrence of coating shedding due to friction stress during the process of implantation. The coating provided by the invention is applicable to clinical applications.

The invention provides a preparation method of a multilevel cellular structure for a medical pure titanium implant surface. The preparation method comprises the step of pretreatment of surface: placing a pure titanium implant into the mixed liquid, and ultrasonically cleaning, then drying; the step of sand blasting, wherein the surface subjected to the sand blasting is changed from metallic luster of silver to lead, concave pits with different depth are formed, and the aperture is ranged from 10 to 40 microns; and the step of acid etching: placing the test sample subjected to the sand blasting into the mixed solution for acid etching, wherein the surface subjected to magnetic stirring has color darker than that before sand blasting, cellular pores are formed based on the concave pits formed in sand blasting, and the aperture is ranged from 0.5 to 3 microns. According to the preparation method, white emery sand higher in purity is adopted and used as the main material for sand-blasting abrasive, so that nearly no pollution is brought to the surface, and the implant surface is prevented from deep damaging; and the titanium dioxide is beneficially used for preventing the sharp from occurring on the surface to result in damage. The multilevel cellular structure is prepared on the implant surface, no particles produced in stand blasting are residual, the benefit is provided for the combination respect to the bone tissue, and the healing time is reduced.

The present invention relates to a design and preparation method for a novel calcium-magnesium-silicon multiphase bioactive ceramic, and a use thereof. According to the present invention, chemical compositions of three novel calcium-magnesium-silicon multiphase bioactive ceramics are firstly designed based on preliminary experimental results and theoretical analysis of phase diagrams; then tetraethoxysilane, water, magnesium nitrate hexahydrate and calcium nitrate tetrahydrate are adopted as raw materials, a sol-gel method is adopted for synthesis of three novel calcium-magnesium-silicon multiphase bioactive ceramic powders; the powders are subjected to dry-pressing and forming to obtain a material bisque; the bisque is subjected to sintering for 2 hours at a temperature of 1300-1350 DEG C to obtain a compact ceramic block body. According to the present invention, the multiphase ceramic MC2 is prepared by the method provided by the present invention, wherein the thermal expansion coefficient of the multiphase ceramic MC2 matches with titanium alloy TC4; because the intrinsic stress between the metal and the ceramic is reduced, the metal-ceramic bonding strength can be improved when the multiphase ceramic MC2 is adopted as the titanium-based bioactive coating; the ceramic has good mechanical property, good biological activity and good osteoblast compatibility; the novel calcium-magnesium-silicon multiphase ceramic MC2 is a potential bioactive ceramic material, and can be used in the surface modification fields of titanium implants in orthopedics, dentistry or plastic surgery, and human body hard tissue repairing and implanting materials; the method provided by the present invention has characteristics of simple process, easily-controlled components and conditions, and is easy to popularize.

The invention provides a preparation method of a titanium implant surface with a micro-nano composite structure. The preparation method comprises the following steps: (1) performing blast sanding and ultrasonic processing on a smooth implant surface, then washing with water, and drying; (2) processing the implant surface in an oxalic acid solution for 30-240 min, then washing with water, and drying, wherein the concentration of the oxalic acid solution is 30% to saturation; and (3) taking a mixed acid solution of H2SO4 with the concentration of 98% and H2O2 with the concentration of 30% for processing, and then washing with water to obtain the titanium implant surface with the micro-nano composite structure. According to the preparation method of the titanium implant surface with the micro-nano composite structure, disclosed by the invention, the implant surface with the micro-nano composite structure is obtained by performing a secondary etching on a micron-structure surface processed by sand blast and oxalic acid, and compared to the micron-structure surface, titanium implant surface is provided with a microstructure with more levels, which is capable of providing more comprehensive environment signals for cell growth and tissue regeneration; and the titanium implant surface with the micro-nano composite structure has super-hydrophilicity and the protein adsorption capability is remarkably enhanced, which are of a great significance to further improving the surface biological activity of implants.

The invention discloses a method for preparing a biomimetic titanium implant with a micro-nano composite structure on a surface and the obtained titanium implant. The method comprises the following steps: A) processing pure titanium or a titanium alloy into an implant substrate, performing surface polishing, performing ultrasonic washing by using acetone, absolute ethanol and deionized water in sequence, and drying; B) processing the surface of the substrate into a micro-nano structure by adopting a mixed acid ultrasonic treatment mode or a mechanical sandblasting treatment mode; C) oxidizing the surface of the micro-nano structure into a titanium oxide nanotube film in situ by adopting a constant-voltage direct-current anodic oxidation technology, so that the biomimetic titanium implant with the micro-nano composite structure on the surface is obtained. The biomimetic titanium implant disclosed by the invention can effectively increase the compatibility and the bonding capacity with bones, and is also favorable to the adhesion, the proliferation, the differentiation and the functional expression of cells, so that the osseointegration capacity and the operation success rate of the implant are improved.

The invention discloses a method of preparing a titanium implant having bioelectricity activity by carrying out water-vapor treatment on a tin-bearing microarc oxidation coating. A titanium sample is placed in a stainless steel tank filled with an electrolytic solution for microarc oxidation; then the titanium sample is placed in a reaction kettle for the water-vapor treatment, tin dioxide in a nano structure grows on the surface of the titanium sample, an electroactivity biological microarc oxidation coating which is in a microscope porous structure is obtained, and tin dioxide grows on the surface of the electroactivity biological microarc oxidation coating. No discontinuous interface exists between the coating and a substrate, bone-like apatite can be formed through rapid induction in a simulated body fluid environment, and the titanium implant has good bioactivity.

It is possible to satisfy all the requirements of minimal invasiveness with maximal permanent result by placing the invented implants (screw). The shape of the screw solves all mentioned technical problems that occurred thus far, i.e. it can be directed through a small gap in the skin by Kirschner's guide-wire (because the screw is hollow-canulated). The screw is larger in body, so a much greater force is needed for it to break. If it does break, it can be removed easier with less lesions to the surrounding bone tissue. At the point of the screw are trisect cuts (on the apex thread) which also make the lesion of the bone lesser as is as it is inserted in its position. Since the head of the screw is bigger and conical, without a narrow part leading to the screw-thread, the screw self-tightens into the bone, which makes the loosening rarer. The loosening is also rarer because of the shape of the screw-thread. The screw has the equal effect throughout the whole time it is implanted in the body. The osteolysis of the heel bone in which the screw stems against is also reduced. The conical shape of the head of the screw, without a narrow part (neck) between the head and the screw-thread, it does not allow ingrowing of the bone tissue, so it can be easily removed when the necessary time of correction is finished. The time necessary for the surgical procedure is significantly shorter, taking up 15 minutes, thus reducing the possibility of a infection, which is also helped by a small operative area. After the placement of the screw, the patient can walk two days after the surgery and he/she does not need any plaster immobilization or physical therapy. The screw is made out of titanium alloy, which gives it a certain toughness; the patient can undergo magnetic examinations, if there is need for such, while the screw is implanted.

A surface activation method of a dental implant comprises: putting a titanium implant in 1-3M of H2SO4 liquid, using the titanium or titanium alloy of the titanium implant as an anode and using a Pt material as a cathode to carry out anode oxidation by using an anode oxidation method, preparing an oxidation film with a three-dimensional spherical pore microstructure on a surface, and existing round pits in different sizes and with apertures of 100-200nm in local areas; and putting the titanium implant with the oxidized anode in 3-5M of NaOH alkali solution for processing and forming a titanium gel on the surface, wherein the enriched Ti-OH groups induce the generation of calcium phosphate crystal nucleuses to form a bone-like apatite layer. The invention uses the combination of the anode oxidation method and an alkali process method for preparing an active TiO2 coating layer on the surface of the titanium alloy, the implant processed by the anode oxidation method has good compatibility with bone, and bonding strength and bone sediment yield are both obviously higher than that of the unprocessed titanium, thereby greatly improving the clinic success ratio of the dental implant.

The invention provides a preparation method of a stable and high-performance titanium implant surface. The preparation method comprises three key steps of sand blasting, acid etching and temperature processing or four key steps of sand blasting, acid etching, secondary acid etching/alkali treatment and temperature processing, wherein sand blasting is carried out by virtue of titanium or titanium alloy, acid etching is carried out for a certain time by virtue of an oxalic acid system or an H2SO4/HCl system or an HF/HNO3 system at a certain temperature, and finally, a micron-scale structural surface is directly subjected to temperature processing or is subjected to acid etching or alkali treatment before temperature processing. According to the preparation method, a large-scale fluctuation structure is obtained through sand blasting, a micron-scale structure/micron-nanometer composite structure is obtained through acid etching, an implant surface with a titanium oxide crystal form and a micron-nanometer composite structure is obtained through temperature processing, and crystalline titanium oxide is obtained by the surface when an original micron-nanometer structure is maintained, so that the surface has good bone integrating capacity, is very stable under a natural storage condition and has good ageing resistance and excellent broad-spectrum antimicrobial ability in a window phase.

A composite coating and method for preparing the composite coating on titanium implants for tissue culture and tissue engineering is provided. The implants are characterized in that the titanium component to be coated is placed in a aqueous solution containing calcium cations, phosphate anions, and dispersed carbon nanoparticles (such as single layer graphene oxide or graphene oxide) in an amount of about 0.05%-1.50% by weight relative to the total weight of aqueous solution. The dimensions of the dispersed graphene oxide should be around, but not limited to, 300-800 nm (X-Y), while their thickness is about 0.7-1.2 nm. The aqueous solution with carbon nanoparticles is prepared by mixing for at least 72 h in temperature in range 20-35° C. and sonicated before electrodeposition process. In the prepared solution is further placed titanium which acts as cathode element (may be the implant), and anode which can be, for example, a platinum rod. Between the cathode and anode is set a potential from −1.3V to −1.7V which results in coating formation by electrodeposition. The titanium implant before the electrodeposition process is treated in sodium hydroxide of HF to improve coating formation and thickness.