High-strength biocompatible titanium wire rope as well as preparation device and preparation method thereof

Abstract

The invention discloses a high-strength biocompatible titanium wire rope and a preparation device and a preparation method thereof.The high-strength biocompatible titanium wire rope comprises multiple strands of twisted titanium alloy wires, the titanium alloy wires are coated with bioactive coatings through laser cladding, and the titanium alloy wires are prepared through the twisting technology of multi-layer interactive twisting combined with local weaving reinforcement. And under the combined action, the titanium alloy wire has ideal structural stability and high-strength performance. The titanium wire rope can accurately meet the diversified requirements of different medical scenes on the aspects of flexibility, strength, operation convenience and the like of instruments, the titanium wire rope can be excellently competent for both fine tissue suture and high-strength bone fixation, and richer and more efficient tool choices are provided for medical workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a high-strength biocompatible titanium wire rope and a preparation device and method thereof. BACKGROUND

[0002] In modern medical practice, devices used for bone fixation and tissue suture, etc. play a decisive role in treatment effect and patient health recovery. An ideal such device must have good biocompatibility, sufficient strength, and excellent corrosion resistance. At present, some metal wire ropes in clinical use have obvious defects in biocompatibility, which can easily trigger the rejection reaction of the human immune system, interfere with the treatment process and possibly bring additional health risks. At the same time, the strength performance of some products is insufficient, and frequent breakage and other serious problems often occur during the mechanical stress of medical operations or long-term use, which greatly affects the stability and durability of the treatment effect. SUMMARY

[0003] In view of the above defects or deficiencies, the purpose of the present application is to provide a high-strength biocompatible titanium wire rope and a preparation device and method thereof.

[0004] To achieve the above purpose, the technical scheme of the present application is as follows: A high-strength biocompatible titanium wire rope, comprising: a plurality of twisted titanium alloy wires, and a bioactive coating on the titanium alloy wires by laser cladding.

[0005] The titanium alloy wire comprises: a core, and a plurality of layers of single-strand titanium alloy wires twisted outside the core; the single-strand titanium alloy wire comprises: a single titanium alloy wire, and a strand core wrapped by the single titanium alloy wire.

[0006] The diameter of the titanium alloy wire is 0.15-0.45mm, and the breaking strength is greater than 1200MPa.

[0007] The twisting process of the titanium alloy wire is as follows: Twist a plurality of single titanium alloy wires with the strand core to obtain a single-strand titanium alloy wire; Twist the single-strand titanium alloy wire with the core by a multi-layer interactive twisting combined with local weaving enhancement to obtain a plurality of twisted titanium alloy wires.

[0008] The titanium alloy wire is a titanium-aluminum alloy, wherein the content of aluminum is 5.5-6.5%; or a titanium-vanadium alloy, wherein the content of vanadium is 3.5-4.5%.

[0009] The bioactive coating is: hydroxyapatite Layer.

[0010] The thickness of the bioactive coating is 20-25μm.

[0011] It includes symmetrically arranged synchronous servo motors, wherein the output end of one end of the synchronous servo motor is provided with a yarn releasing disc, the output end of the other end of the synchronous servo motor is provided with a yarn collecting disc, the yarn collecting disc is provided with a yarn collecting motor, and the titanium alloy wire is wound on the yarn releasing disc; one of the synchronous servo motors is provided with a servo motor reciprocating motor; one side of the titanium alloy wire is provided with a laser etching machine; and the yarn releasing disc is provided with a damper.

[0012] The servo motor reciprocating motor is further provided with a large disc wheel, and the large disc wheel is provided with a spinning wheel to twist the coated titanium alloy wire.

[0013] A preparation method of a high-strength biocompatible titanium wire rope comprises the following steps: A plurality of single titanium alloy wires are selected, and the surfaces of the titanium alloy wires are cleaned and polished; The plurality of single titanium alloy wires are twisted with a core to obtain single-strand titanium alloy wires; The single-strand titanium alloy wires are twisted with a rope core by a multi-layer interactive twisting and local weaving enhancement method to obtain multi-strand twisted titanium alloy wires; The titanium alloy wires are circumferentially laser etched, and a bioactive coating is uniformly coated on the titanium alloy wires. Compared with the prior art, the beneficial effects of the present application are: The present application provides a high-strength biocompatible titanium wire rope and a preparation device and method thereof, which are twisted by a multi-layer interactive twisting and local weaving enhancement method, and the titanium alloy wires have ideal structural stability and high-strength performance. The titanium wire rope can accurately meet the diversified needs of different medical scenarios in terms of flexibility, strength and operation convenience, and can be used for fine tissue suturing and high-strength bone fixation, and provides medical workers with more abundant and efficient tool options.

[0014] Further, the carefully designed bioactive coating effectively reduces the stimulation and damage risk to human tissues, and further optimizes the biocompatibility. At the same time, the significantly improved corrosion resistance ensures that the titanium wire rope can stably play a role in a complex human physiological environment for a long time, and provides a strong guarantee for the long-term effectiveness of medical treatment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the titanium alloy wire structure of the present application Figure 1 ; Figure 2 is a schematic diagram of the titanium alloy wire structure of the present application Figure 1 ; Figure 3This is a structural diagram of the high-strength biocompatible titanium wire rope preparation device of the present invention.

[0017] In the diagram, 1—titanium alloy wire; 11—rope core; 12—single strand titanium alloy wire; 121—single titanium alloy wire; 122—strand core; 2—feeding reel; 3—taking-up reel; 4—taking-up motor; 5—laser etching machine; 6—servo motor / reciprocating motor; 7—damper; 8—synchronous servo motor. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the protection scope of the present invention.

[0020] Example 1 like Figure 1 As shown, the present invention provides a high-strength biocompatible titanium wire rope, comprising: multi-strand twisted titanium alloy wire 1, wherein the titanium alloy wire 1 is coated with a bioactive coating by laser cladding.

[0021] Specifically, the titanium alloy wire 1 includes: a rope core 11, with multiple layers of single-strand titanium alloy wires 12 twisted around the rope core 11; the single-strand titanium alloy wire 12 includes: a single titanium alloy wire 121, which wraps around the strand core 122. The diameter of the titanium alloy wire 1 is 0.15-0.45 mm, and its breaking strength is greater than 1200 MPa.

[0022] like Figure 2 As shown, the twisting process of the titanium alloy wire 1 is as follows: Multiple single titanium alloy wires 121 are twisted together with a core strand 122 to obtain a single titanium alloy wire 12. The single-strand titanium alloy wire 12 is braided with the rope core 11 by a multi-layer interlaced twisting combined with local braiding reinforcement to obtain a multi-strand twisted titanium alloy wire 1.

[0023] The strand core 122 and the rope core 11 are both titanium wires. All materials in the titanium wire rope are titanium, except that the diameter of the titanium wires used as rope cores or strand cores at different positions is different. The diameter of the strand core 122 is 1.5 mm, and the diameter of the rope core 11 is 1.0 mm.

[0024] For example, the titanium alloy wire 1 described in this invention is a titanium-aluminum alloy, wherein the aluminum content is 5.5–6.5%; or a titanium-vanadium alloy, wherein the vanadium content is 3.5–4.5%. By reducing the content of impurity elements, the plasticity, toughness, and weldability are improved, making it suitable for medical applications.

[0025] The bioactive coating 2 is a hydroxyapatite coating, and the thickness of the bioactive coating 2 is 20-25 μm.

[0026] Hydroxyapatite Its main functions are: Promotes osseointegration: The hydroxyapatite coating enhances the corrosion resistance of the metal substrate while stimulating host tissue healing and accelerating the integration of bone tissue with the implant.

[0027] Enhancing biocompatibility: Surface modification techniques can improve the bioactivity of metallic materials and reduce immune rejection after implantation.

[0028] Enhanced mechanical properties: Some coating technologies (such as plasma spraying) can achieve high bonding strength with the substrate, ensuring the long-term stability of the implant.

[0029] Example 2 like Figure 3 As shown, a high-strength biocompatible titanium wire rope preparation device includes: symmetrically arranged synchronous servo motors 8, wherein a wire feeding reel 2 is provided at the output end of one synchronous servo motor 8, and a wire taking reel 3 is provided at the output end of the other synchronous servo motor 8, a wire taking motor 4 is provided on the wire taking reel 3, and the titanium alloy wire 1 is wound on the wire feeding reel 2; a servo motor reciprocating motor 6 is installed on one of the synchronous servo motors 8, and a laser etching machine 5 is provided on one side of the titanium alloy wire 1.

[0030] The feeding reel 2 is equipped with a damper 7, and both the feeding reel 2 and the take-up reel 3 are mounted on the output shaft of the synchronous motor via a wire frame.

[0031] In addition, this invention also provides a method for preparing a high-strength biocompatible titanium wire rope, including: Multiple single titanium alloy wires 121 were selected, and their surfaces were cleaned and polished. Multiple single titanium alloy wires 121 are twisted together with a core strand 122 to obtain a single titanium alloy wire 12. The single-strand titanium alloy wire 12 is braided with the rope core 11 by a multi-layer interlaced twisting combined with local braiding reinforcement to obtain a multi-strand twisted titanium alloy wire 1. The titanium alloy wire 1 is laser-etched circumferentially to uniformly cover the titanium alloy wire 1 with a bioactive coating 2.

[0032] Example 3: A titanium wire cord for routine bone fixation was manufactured. Titanium alloy wires with a diameter of 0.3 mm were selected and processed into titanium wire cords with a diameter of 1.5 mm using a specific twisting process, and a composite coating with a thickness of 20 μm was constructed. The tensile strength of this titanium wire cord was tested to be 1200 MPa. Example 4: A high-strength titanium wire rope for complex bone repair is produced. Titanium alloy wire with a diameter of 0.45 mm is twisted into a titanium wire rope with a diameter of 2.5 mm through an innovative twisting process, and a composite coating with a thickness of 25 μm is constructed. Test results show that the breaking strength is as high as 1250 MPa.

[0033] It is obvious for those skilled in the art that the above specific examples are only preferred solutions of the present application, and thus any improvement or change made by those skilled in the art to some parts of the present application, which still embodies the principles of the present application and achieves the purpose of the present application, shall fall within the scope of the present application.

Claims

1. A high-strength biocompatible titanium wire rope, characterized in that, The application relates to a multi-strand twisted titanium alloy wire (1) which is provided with a bioactive coating by laser cladding. The titanium alloy wire (1) comprises a core (11) which is twisted with a plurality of single-strand titanium alloy wires (12) outside; the single-strand titanium alloy wire (12) comprises a single titanium alloy wire (121) which is wrapped with a strand core (122).

2. The high-strength biocompatible titanium wire rope of claim 1, wherein, The diameter of the titanium alloy wire (1) is 0.15-0.45 mm, and the breaking strength is greater than 1200 MPa.

3. The high-strength biocompatible titanium wire rope according to claim 1 or 2, characterized in that, The twisting process of the titanium alloy wire (1) is as follows:

4. The high-strength biocompatible titanium wire rope according to claim 1 or 2, characterized in that, a plurality of single titanium alloy wires (121) are twisted with a strand core (122) to obtain a single-strand titanium alloy wire (12); the single-strand titanium alloy wire (12) is woven with the core (11) by a multi-layer interactive twisting and local weaving enhancement mode to obtain the multi-strand twisted titanium alloy wire (1). The titanium alloy wire (1) is a titanium-aluminum alloy, wherein the content of aluminum is 5.5-6.5%; or a titanium-vanadium alloy, wherein the content of vanadium is 3.5-4.5%.

5. The high-strength biocompatible titanium wire rope of claim 1, wherein, The bioactive coating has a thickness of 20-25 mu m.

6. The high-strength biocompatible titanium wire rope of claim 1, wherein, The bioactive coating is: hydroxyapatite layer.

7. The high-strength biocompatible titanium wire rope according to claim 1 or 6, characterized in that, The application also relates to a device for manufacturing the titanium alloy wire (1), which comprises:

8. A device for preparing high-strength biocompatible titanium wire ropes, characterized by symmetrically arranged synchronous servo motors (8), wherein the output end of one end of the synchronous servo motor (8) is provided with a yarn feeding disc (2), the output end of the other end of the synchronous servo motor (8) is provided with a yarn collecting disc (3), the yarn collecting disc (3) is provided with a yarn collecting motor (4), and the titanium alloy wire (1) is wound on the yarn feeding disc (2); one side of the titanium alloy wire (1) is provided with a laser etching machine (5) for coating a bioactive coating; and the yarn feeding disc (2) is provided with a damper (7). The device also comprises a servo motor reciprocating motor (6), the output shaft of the servo motor reciprocating motor (6) is provided with a large pulley (61), and the large pulley (61) is provided with a spinning wheel (62); and the coated titanium alloy wire (1) is twisted.

9. The high-strength biocompatible titanium wire rope production apparatus according to claim 6, characterized in that, The application relates to a method for manufacturing a multi-strand twisted titanium alloy wire (1) which is provided with a bioactive coating by laser cladding.

10. A method of preparing a high-strength biocompatible titanium wire rope, characterized by, The method comprises the following steps: a plurality of single titanium alloy wires (121) are selected and the surfaces of the single titanium alloy wires (121) are cleaned and polished; the plurality of single titanium alloy wires (121) are twisted with a strand core (122) to obtain a single-strand titanium alloy wire (12); the single-strand titanium alloy wire (12) is woven with a core (11) by a multi-layer interactive twisting and local weaving enhancement mode to obtain the multi-strand twisted titanium alloy wire (1); the titanium alloy wire (1) is circumferentially laser etched, and the titanium alloy wire (1) is uniformly coated with a bioactive coating.

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