Implant surface coating manufacturing method and implant surface coating manufacturing device

Abstract

The invention relates to the technical field of implant processing, and provides an implant surface coating manufacturing method and device, and the method comprises the following steps: S1, preparing an implant, and placing the implant in a placement position; s2, processing a concave space on the surface of the implant; and S3, predetermined fusible powder is sprayed into the concave space, and a first laser beam is emitted into the concave space to melt the predetermined fusible powder.

Description

Technical Field

[0001] The present invention belongs to the technical field of implant processing, and more specifically, relates to a manufacturing method and a manufacturing device for an implant surface coating. Background Art

[0002] Implant coatings are mainly used to improve the biocompatibility, bone integration performance, and functional characteristics of implants. Hydroxyapatite (HA) coatings are widely used in implant surface modification due to their good bioactivity and osteoconductivity. The main preparation method of HA coatings is plasma spraying (e.g., Chinese Patent Publication Nos.: CN117919505A, CN108785750A). HA powder is heated and melted by the high temperature generated by a plasma arc and sprayed onto the substrate surface. After cooling, the HA powder adheres to the implant surface to form a coating. Based on this principle, researchers in this field have developed a laser spraying method for HA (such as patents, CN102851664A, CN105018924A). By irradiating a specified titanium surface with a laser to generate high temperature, the HA powder and the titanium surface are melted, and after cooling, the HA powder and the titanium surface are fused and adhered to each other to achieve precise coating on the implant surface and improve the bonding strength between the coating and the titanium alloy substrate.

[0003] After the HA coating is implanted into the human body, it is hoped that the coating surface has a porous structure and contains a certain amount of amorphous metastable phase, which can dissolve rapidly after implantation to induce the growth of osteoblasts. However, the porous structure coating will scrape and fall off at the interface with bone tissue during the implant implantation process, and the coating is also prone to dissolution and peeling after long-term service. The peeling of the coating will directly expose the titanium surface to the bone tissue, which is not conducive to the bone bonding and long-term stability of the implant. At present, there is a problem of mutual contradiction between the mechanical properties and biological properties requirements in the actual application of HA coatings. Please refer to Figure 1 , a coating part 2` is formed on the surface of the implant 1`, the bone tissue B` contacts the coating part 2`, and under external scraping or corrosion, a part of the coating part 2` peels off to form a scraping or dissolution area 21`.

[0004] Preparing a coating with a dense structure can improve the mechanical properties of the coating to a certain extent, but the HA particles need to be fully melted, which cannot form a porous structure with good bioactivity and will inevitably generate too many decomposition phases and amorphous phases in the coating, reducing the long-term service stability of the coating. Summary of the Invention

[0005] The purpose of the present invention is to provide a manufacturing method for an implant surface coating to solve the technical problem of easy peeling of the coating on the implant in the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for manufacturing a surface coating of an implant, including:

[0007] S1: Prepare the implant and place the implant at the placement position;

[0008] S2: Process a recessed space on the surface of the implant;

[0009] S3: Spray a predetermined fusible powder into the recessed space and emit a first laser beam into the recessed space to melt the predetermined fusible powder.

[0010] Further, before the step S2, a surface treatment layer is formed on the surface of the implant.

[0011] Further, the step S3 further includes: collecting the predetermined fusible powder floating outside the recessed space through a collecting air flow.

[0012] Further, the predetermined fusible powder is any one of hydroxyapatite powder, titanium and titanium alloy materials, bioceramic materials, drugs, and silver ion antibacterial materials.

[0013] Further, in the step S2, a second laser beam is emitted onto the surface of the implant to process a recessed space on the surface of the implant; and / or

[0014] In the step S2, a plurality of recessed spaces are processed on the surface of the implant along a predetermined trajectory; in the step S3, the predetermined fusible powder is sequentially sprayed into each of the recessed spaces along the predetermined trajectory, and a first laser beam is emitted into each of the recessed spaces to melt the predetermined fusible powder.

[0015] The present invention also provides an apparatus for manufacturing a surface coating of an implant, including:

[0016] A workbench; a placement position for placing the implant is provided on the workbench;

[0017] A powder spraying device; the powder spraying device sprays a predetermined fusible powder towards the placement position;

[0018] A processing device; the processing device is used for processing a recessed space on the surface of the implant and emitting a first laser beam into the recessed space to melt the predetermined fusible powder;

[0019] Further, the processing device includes: a first laser; the first laser can emit a second laser beam onto the surface of the implant to process a recessed space on the surface of the implant, and the first laser can emit a first laser beam into the recessed space to melt the predetermined fusible powder; or

[0020] The processing equipment includes: a second laser and a third laser; the second laser can emit a second laser beam to process a concave space on the surface of the implant, and the third laser can emit a first laser beam into the concave space to melt the predetermined fusible powder.

[0021] Further, the power of the first laser beam is less than the power of the second laser beam.

[0022] Further, it further includes: a powder collection device; the powder collection device can generate a collection air flow to collect the predetermined fusible powder floating outside the concave space.

[0023] Further, it further includes: a rotating table and / or a moving lifting table; the workbench is located on the rotating table; the processing equipment is arranged on the moving lifting table.

[0024] The beneficial effects of the implant surface coating manufacturing method provided by the present invention are as follows: compared with the prior art, the implant surface coating manufacturing method and device provided by the present invention prepare the implant and place the implant on the placement position; process a concave space on the surface of the implant; spray the predetermined fusible powder into the concave space, emit a first laser beam into the concave space, the first laser beam can melt the fusible powder in the concave space, and the predetermined fusible powder can adhere to the inner wall of the concave space or accumulate in the concave space after melting, and the melted predetermined fusible powder fills the concave space and forms a coating part after cooling; since the coating part is located inside the concave space, it is not easily scratched off under the action of external force; the coating part is in closer contact with the inner wall of the concave space and is not easily peeled off under erosion or dissolution. When the coating part induces bone tissue growth, the bone tissue can be embedded into the concave space, making the connection between the bone tissue and the implant more firm. In addition, the coating part and the bone tissue can cooperate with each other to provide an anchoring effect on the bone tissue. Description of the Drawings

[0025] Figure 1 Schematic diagram of the generation of the scratching or dissolution area in the prior art;

[0026] Figure 2 Schematic diagram of the cooperation between the surface treatment layer and the bone tissue provided by the embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the cooperation between the spraying air flow and the collection air flow provided by the embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the over-cladding area provided by the embodiment of the present invention;

[0029] Figure 5 Schematic diagram of the surface treatment of the implant surface provided by the embodiment of the present invention;

[0030] Figure 6 Schematic diagram for forming a concave space and a coating part on the basis of Figure 5 ;

[0031] Figure 7 Stereo schematic of the implant surface coating manufacturing device provided by an embodiment of the present invention Figure 1 ;

[0032] Figure 8 Stereo schematic of the implant surface coating manufacturing device provided by an embodiment of the present invention Figure 2 ;

[0033] Figure 9 Flow chart of the implant surface coating manufacturing method provided by an embodiment of the present invention.

[0034] Among them, each reference numeral in the figure:

[0035] 1, 1` - implant; 11 - surface treatment layer; 12 - concave space; 2, 2` - coating part; 21` - scraping or dissolving area; 31 - spraying air flow; 32 - collecting air flow; 331 - predetermined fusible powder; 332 - outer powder; 41 - workbench; 42 - powder spraying device; 43 - processing equipment; 431 - first laser; 432 - second laser; 433 - third laser; 44 - rotating table; 45 - moving lifting table; 46 - frame; 47 - powder collection device; B, B` - bone tissue; H - groove depth; G - over - clad area; F - first laser beam; D, D` - contact interface. Detailed implementation manners

[0036] It should be noted that the specific embodiments are only used to explain the present invention and are not used to limit the present invention.

[0037] It should be noted that in the description of the embodiments of the present application, unless otherwise specified, " / " means "or", for example, A / B may mean A or B; herein, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B can be singular or plural respectively.

[0038] It should be noted that when an element is referred to as "fixed on" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" or "connected at" another element, it can be directly connected to the other element or indirectly connected to the other element. When an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element.

[0039] It should be noted that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0041] It should be noted that the meaning of the term "plurality" is two or more, unless otherwise specifically defined.

[0042] Please refer to Figure 9 together, and now a method for manufacturing a surface coating of an implant provided by the present invention will be described. The method for manufacturing a surface coating of an implant includes:

[0043] S1: Prepare the implant 1 and place the implant 1 at the placement position;

[0044] S2: Machine a recessed space 12 on the surface of the implant 1;

[0045] S3: Spray a predetermined fusible powder 331 into the recessed space 12 and emit a first laser beam F into the recessed space 12 to melt the predetermined fusible powder 331.

[0046] In this way, prepare the implant 1 and place the implant 1 at the placement position; machine a recessed space 12 on the surface of the implant 1; spray a predetermined fusible powder 331 into the recessed space 12 and emit a first laser beam F into the recessed space 12. The first laser beam F can melt the fusible powder in the recessed space 12. After the predetermined fusible powder 331 is melted, it can adhere to the inner wall of the recessed space 12 or accumulate in the recessed space 12. After the melted predetermined fusible powder 331 fills the recessed space 12 and cools, a coating portion 2 is formed; since the coating portion 2 is located inside the recessed space 12, it is not easily scratched off under the action of external forces; the coating portion 2 is in closer contact with the inner wall of the recessed space 12 and is not easily peeled off under erosion or dissolution. When the coating portion 2 induces the growth of bone tissue B, the bone tissue B can be embedded into the recessed space 12, making the connection between the bone tissue B and the implant 1 more firm. In addition, the coating portion 2 and the bone tissue B can cooperate with each other to provide an anchoring effect on the bone tissue B.

[0047] In one embodiment, the recessed space 12 is: a recess, a groove or a hole.

[0048] In one embodiment, the number of grooves is multiple. In one embodiment, the grooves extend vertically.

[0049] In one embodiment, the surface of the coating part 2 is flush with the surface of the implant 1.

[0050] In one embodiment, the groove depths H at different positions within the recessed space 12 are the same.

[0051] In one embodiment, the recessed space 12 is a cuboid recess.

[0052] In one embodiment, the size and structure of the recessed space 12 are designed according to the specific condition of the bone mass.

[0053] Further, please refer to Figures 5 to 6 , as a specific implementation manner of the implant surface coating manufacturing method provided by the present invention, before step S2, a surface treatment layer 11 is formed on the surface of the implant 1. In this way, the surface treatment layer 11 is first formed on the surface of the implant 1, which is convenient for cooperation with the bone tissue B; after the surface treatment layer 11 is formed, the recessed space 12 is processed, which is convenient for the surface treatment of the implant 1 outside the recessed space 12.

[0054] In one embodiment, the surface treatment layer 11 is formed by treating the surface of the implant 1 by any one of sandblasting and acid etching, laser etching, and anodic oxidation.

[0055] In one embodiment, the contact interface D where the implant 1 contacts the bone tissue B is: the surface of the surface treatment layer 11 or the surface of the implant 1.

[0056] Further, please refer to Figures 2 to 4 , as a specific implementation manner of the implant surface coating manufacturing method provided by the present invention, step S3 further includes: collecting the predetermined fusible powder 331 floating outside the recessed space 12 through the collecting air flow 32. In this way, the predetermined fusible powder 331 (i.e., the outer powder 332) floating outside the recessed space 12 is collected through the collecting air flow 32.

[0057] Further, please refer to Figures 2 to 4 , as a specific implementation manner of the implant surface coating manufacturing method provided by the present invention, the predetermined fusible powder 331 is any one of hydroxyapatite powder, titanium and titanium alloy materials, bioceramic materials, drugs, and silver ion antibacterial materials. In this way, the hydroxyapatite layer, titanium and titanium alloy material layer, bioceramic material layer, drug layer, and silver ion antibacterial layer formed in the recessed space 12 can have good induction for the growth of the bone tissue B.

[0058] In one embodiment, an antibacterial substance or antibacterial element is doped into the predetermined fusible powder 331.

[0059] Further, please refer to Figures 1 to 5 , as a specific implementation manner of the method for manufacturing the implant surface coating provided by the present invention, in step S2, a second laser beam is emitted onto the surface of the implant 1 to machine a recessed space 12 on the surface of the implant 1. In this way, by irradiating the surface of the implant 1 with the second laser beam and machining the recessed space 12, the efficiency is high.

[0060] In one embodiment, when the second laser beam irradiates the surface of the implant 1, it can vaporize the surface of the implant 1 to machine the recessed space 12.

[0061] In one embodiment, in step S2, a plurality of recessed spaces 12 are machined on the surface of the implant 1 along a predetermined trajectory; in step S3, the predetermined fusible powder 331 is sequentially sprayed into each recessed space 12 along the predetermined trajectory, and a first laser beam F is emitted into each recessed space 12 to melt the predetermined fusible powder 331. In this way, the powder spraying process and the process of machining the recessed space 12 (i.e., the second laser beam drilling) are separated, because the sprayed powder may also be vaporized and melted by the drilling laser, affecting the subsequent spraying quality; therefore, the most efficient processing method is to first machine all the holes (i.e., a plurality of recessed spaces 12) on the surface of the implant 1, and then perform the cladding process (i.e., the powder spraying and laser cladding processes) according to the drilling trajectory and position (i.e., the predetermined trajectory), so that each cladding laser is aligned with the corresponding drilling position.

[0062] Please refer to Figures 7 to 8 , the present invention also provides an implant surface coating manufacturing device, including: a workbench 41, a powder spraying device 42, and a processing device 43; the workbench 41 has a placement position for placing the implant 1; the powder spraying device 42 sprays the predetermined fusible powder 331 onto the placement position; the processing device 43 is used to machine a recessed space 12 on the surface of the implant 1 and emit a first laser beam F into the recessed space 12 to melt the predetermined fusible powder 331.

[0063] Thus, prepare the implant 1 and place the implant 1 in the placement position; the processing device 43 can process a concave space 12 on the surface of the implant 1; the powder spraying device 42 sprays a predetermined fusible powder 331 into the concave space 12, and the processing device 43 can emit a first laser beam F into the concave space 12. The first laser beam F can melt the fusible powder in the concave space 12. After the predetermined fusible powder 331 melts, it can adhere to the inner wall of the concave space 12 or accumulate in the concave space 12. After the melted predetermined fusible powder 331 fills the concave space 12 and cools, a coating part 2 is formed. Since the coating part 2 is located inside the concave space 12, it is not easily scratched under the action of external forces; after the melted and solidified coating part 2 comes into closer contact with the inner wall of the concave space 12, it is not easily detached under erosion or dissolution. When the coating part 2 induces the growth of bone tissue B, the bone tissue B can be embedded in the concave space 12, making the connection between the bone tissue B and the implant 1 more firm.

[0064] In one embodiment, the powder spraying device 42 sprays evenly.

[0065] In one embodiment, the cladding time of the first laser 431 corresponds to the depth of the concave space 12, facilitating the surface of the coating part 2 in the concave space 12 to be flush with the surface of the implant 1 and reducing the over-cladding area G outside the concave space 12.

[0066] In one embodiment, the placement position is a space, a recess or a groove above the workbench 41.

[0067] Further, please refer to Figures 7 to 8 , as a specific implementation manner of the implant surface coating manufacturing device provided by the present invention, the processing device 43 includes: a first laser 431; the first laser 431 can emit a second laser beam to the surface of the implant 1 to process a concave space 12 on the surface of the implant 1, and the first laser 431 can emit a first laser beam F into the concave space 12 to melt the predetermined fusible powder 331. Thus, the same first laser 431 can emit the first laser beam F and the second laser beam respectively. The second laser beam can process a concave space 12 on the surface of the implant 1, and the first laser beam F can melt the predetermined fusible powder 331 in the concave space 12.

[0068] In one embodiment, the processing device 43 includes: a second laser 432 and a third laser; the second laser 432 can emit a second laser beam to process a concave space 12 on the surface of the implant 1, and the third laser can emit a first laser beam F into the concave space 12 to melt the predetermined fusible powder 331. Thus, the second laser beam can process a concave space 12 on the surface of the implant 1, and the first laser beam F can melt the predetermined fusible powder 331 in the concave space 12.

[0069] Further, please refer to Figures 7 to 8 As a specific embodiment of the implant surface coating manufacturing device provided by the present invention, the power of the first laser beam F is less than that of the second laser beam. In this way, the first laser beam F is prevented from damaging the recessed space 12.

[0070] Further, please refer to Figures 7 to 8 As a specific embodiment of the implant surface coating manufacturing device provided by the present invention, it further includes: a powder collection device 47; the powder collection device 47 can generate a collection air flow 32 to collect the predetermined fusible powder 331 floating outside the recessed space 12. In this way, the outer powder 332 floating outside the recessed space 12 is collected through the collection air flow 32.

[0071] In one embodiment, the placement position is located between the processing device 43 and the powder collection device 47, and the recessed space 12 is formed on the surface of the implant 1 facing away from the powder collection device 47, reducing the interference of the collection air flow 32 on the spraying air flow 31 of the powder spraying device 42.

[0072] In one embodiment, the powder collection device 47 is provided with a deflector for guiding the air flow. In one embodiment, the number of deflectors is multiple, and the multiple deflectors are arranged in parallel at intervals. In one embodiment, the intervals between any adjacent deflectors are the same. In one embodiment, each deflector is rotatably arranged around a pivot on the outer shell of the powder collection device 47. In this way, the powder collection device 47 can change the direction of the collection air flow 32 through the deflector.

[0073] In one embodiment, the spraying air flow 31 flows along the first air duct; in the flowing direction of the spraying air flow 31, the cross-section of the first air duct gradually expands. In one embodiment, the spraying air flow 31 at the edge of the first air duct forms a smaller angle with the implant 1 as it gets closer to the implant 1. In this way, the air flow at the edge of the first air duct is easily blown along the surface of the implant 1 towards the edge of the implant 1 when approaching the implant 1, facilitating the spraying air flow 31 to carry away the excess predetermined fusible powder 331 outside the recessed space 12 from the implant 1. In one embodiment, in the direction of the spraying air flow 31 blowing towards the implant 1, the expansion rate of the cross-section of the first air duct becomes faster and faster. In this way, when the spraying air flow 31 flows along the first air duct, the spraying air flow 31 can expand more rapidly towards the outer side of the cross-section of the first air duct, preventing the accumulation of the predetermined fusible powder 331 in the first air duct. In one embodiment, the edge of the first air duct is smooth.

[0074] In one embodiment, the collecting air flow 32 flows along the second air duct; after the spraying air flow 31 passes over the implant 1, the predetermined fusible powder 331 in the spraying air flow 31 is carried away by the collecting air flow 32 on the other side of the implant 1. In one embodiment, in the flowing direction of the collecting air flow 32, the cross-section of the second air duct gradually decreases. In this way, it is convenient for the predetermined fusible powder 331 passing over the implant 1 to be converged by the collecting air flow 32. In one embodiment, in the direction of the collecting air flow 32 away from the implant 1, the decreasing rate of the cross-section of the second air duct becomes slower and slower. In this way, when the collecting air flow 32 flows along the second air duct, the spraying air flow 31 can gradually gather more slowly towards the inner side of the cross-section of the second air duct, avoiding a sharp disorder of the air flow. In one embodiment, the edge of the second air duct is smooth.

[0075] Further, please refer to Figures 7 to 8 , as a specific implementation manner of the implant surface coating manufacturing device provided by the present invention, further includes: a rotating table 44 and / or a moving lifting table 45; the workbench 41 is located on the rotating table 44; the processing device 43 is arranged on the moving lifting table 45. In this way, the orientation of the implant 1 can be adjusted through the rotating table 44, and the height or the front-back position of the processing device 43 can be adjusted by the moving lifting table 45, so that the processing device 43 can process the surface areas at different positions and orientations on the implant 1.

[0076] In one embodiment, the processing device 43 further includes: a frame 46; the processing device 43 is arranged on the frame 46; the moving lifting table 45 is slidably arranged on the frame 46 in a lifting manner.

[0077] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can still be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A method for manufacturing an implant surface coating, characterized in that: include: S1: preparing an implant and placing the implant in a placement position; S2: machining a recessed space on the surface of the implant; S3: spraying predetermined fusible powder into the recessed space, and emitting a first laser beam into the recessed space to melt the predetermined fusible powder.

2. The method for manufacturing an implant surface coating according to claim 1, characterized in that: Before step S2, a surface treatment layer is formed on the surface of the implant.

3. The method for manufacturing an implant surface coating according to claim 1, characterized in that: The step S3 further includes: collecting the predetermined meltable powder floating outside the recessed space by collecting airflow.

4. The method for manufacturing an implant surface coating according to claim 1, characterized in that: The predetermined fusible powder is any one of hydroxyapatite powder, titanium and titanium alloy materials, bioceramic materials, drugs, and silver ion antibacterial materials.

5. The method for manufacturing an implant surface coating according to claim 1, characterized in that: In the step S2, a second laser beam is emitted to the surface of the implant to machine a recessed space on the surface of the implant; and / or In the step S2, a plurality of recessed spaces are machined on the surface of the implant along a predetermined trajectory; In the step S3, predetermined fusible powder is sprayed into each of the recessed spaces in sequence along the predetermined trajectory, and a first laser beam is emitted into each of the recessed spaces to melt the predetermined fusible powder.

6. An implant surface coating manufacturing device, characterized in that: include: A workbench; the workbench has a placement position for placing an implant; A powder spraying device; the powder spraying device sprays a predetermined fusible powder toward the placement position; Processing equipment; the processing equipment is used to process a recessed space on the surface of the implant and emit a first laser beam into the recessed space to melt the predetermined fusible powder.

7. The implant surface coating manufacturing device according to claim 6, characterized in that: The processing equipment comprises: a first laser; the first laser can emit a second laser beam to the surface of the implant to process the recessed space on the surface of the implant, and the first laser can emit the first laser beam into the recessed space to melt the predetermined fusible powder; or The processing equipment includes: a second laser and a third laser; the second laser can emit a second laser beam to process the recessed space on the surface of the implant, and the third laser can emit the first laser beam into the recessed space to melt the predetermined fusible powder.

8. The implant surface coating manufacturing device according to claim 7, characterized in that: The power of the first laser beam is smaller than the power of the second laser beam.

9. The implant surface coating manufacturing device according to claim 6, characterized in that: Also includes: Powder collection device; The powder collecting device can generate a collecting airflow to collect the predetermined meltable powder floating outside the recessed space.

10. The implant surface coating manufacturing device according to claim 6, characterized in that: Also includes: A rotating platform and / or a mobile lifting platform; the workbench is located on the rotating platform; The processing equipment is arranged on the mobile lifting platform.

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