阅读说明：本技术 层压成型的多孔部件的一步制造方法 (One-step method for producing a laminated porous member ) 是由 郑庚焕 金建熙 李秉洙 金炯均 梁承敏 金江玟 金源来 咸玟知 金庚勋 李昌祐 于 2018-10-12 设计创作，主要内容包括：本发明的实施例提供一种通过一步层压成型来制造具有基材层和多孔层的多孔部件的方法,由此可以减少制造产品时的制造时间,并且可以提供能够被控制多孔层的形状和尺寸的多孔部件。包括多孔部件的植入物具有增大的骨接触率,因此可以改善骨间的骨生长性,并且可以容易地设计适于个体患者的骨架的产品。(Embodiments of the present invention provide a method of manufacturing a porous member having a substrate layer and a porous layer by one-step lamination molding, whereby manufacturing time in manufacturing a product can be reduced, and a porous member capable of controlling the shape and size of the porous layer can be provided. The implant including the porous member has an increased bone contact rate, so that bone growth between bones can be improved, and a product suitable for a skeleton of an individual patient can be easily designed.)

1. A one-step method of making a laminated porous member, the method comprising the steps of:

stacking the metal particles;

repeatedly melting and cooling the metal particles of the layer stack by irradiating the metal particles with laser light, thereby forming a base material layer;

forming a first porous layer by adjusting a column distance and a dot distance while irradiating laser light to form a laser light irradiation dot having a predetermined diameter D on the base material layer;

stacking the same metal particles as the metal particles on the first porous layer; and

the second porous layer is formed by adjusting the column distance and the dot distance while irradiating laser light to form a laser light irradiation dot having a predetermined diameter D on the first porous layer.

2. The method of claim 1, wherein the metal particles are one or more selected from the group consisting of titanium (Ti), titanium (Ti) -based alloys, cobalt (Co) -based alloys, nickel (Ni) -based alloys, zirconium (Zr) -based alloys, barium (Ba) -based alloys, magnesium (Mg) -based alloys, vanadium (V) -based alloys, iron (Fe) -based alloys, and mixtures thereof.

3. The method according to claim 1, wherein, in the step of forming the base material layer and the step of forming the first porous layer, an energy of the laser is equal to or greater than a complete melting energy of the metal particles.

4. The method according to claim 1, wherein, in the step of forming the second porous layer, an energy of the laser is equal to or more than 0.2 times a full melting energy of the metal particles in a range equal to or less than the full melting energy.

5. The method according to claim 1, wherein in the step of forming the first porous layer and the step of forming the second porous layer, a column distance and a point distance are larger than a diameter D of the laser irradiation point.

6. The method according to claim 5, wherein the diameter D of the laser irradiation spot is proportional to a light source power of the laser and an exposure time, which is inversely proportional to a scanning speed of the laser.

7. A method according to claim 6, wherein the source power of the laser is 50W to 1KW and the scanning speed is 0.1m/s to 8 m/s.

8. The method of claim 5, wherein the column distance and the dot distance are 100 μm to 1000 μm, respectively.

9. The method of claim 1, wherein the first porous layer is gravure printed.

10. A one-step method of making a laminated porous member, the method comprising the steps of:

stacking the metal particles;

repeatedly melting and cooling the metal particles by irradiating laser light to the metal particles of the layer stack, thereby forming a base material layer;

stacking metal particles which are the same as the metal particles on the substrate layer;

forming a first porous layer by adjusting a column distance and a point distance while irradiating laser light to form a laser light irradiation point having a predetermined diameter D on the metal particles stacked on the base material layer;

stacking the same metal particles as the metal particles on the first porous layer; and

the second porous layer is formed by adjusting the column distance and the dot distance while irradiating laser light to form laser light irradiation dots having a predetermined diameter D on the metal particles stacked on the first porous layer.

11. The method of claim 10, the metal particles being one or more selected from the group of titanium (Ti), titanium (Ti) -based alloys, cobalt (Co) -based alloys, nickel (Ni) -based alloys, zirconium (Zr) -based alloys, barium (Ba) -based alloys, magnesium (Mg) -based alloys, vanadium (V) -based alloys, iron (Fe) -based alloys, and mixtures thereof.

12. The method of claim 10, wherein, in the step of forming the substrate layer, the energy of the laser is equal to or greater than the complete melting energy of the metal particles.

13. The method according to claim 10, wherein, in the step of forming the first porous layer and the step of forming the second porous layer, the energy of the laser is equal to or more than 0.2 times the full melting energy of the metal particles in a range equal to or less than the full melting energy.

14. The method according to claim 10, wherein in the step of forming the first porous layer and the step of forming the second porous layer, the column distance and the point distance are larger than a diameter D of the laser irradiation point.

15. The method according to claim 14, wherein the diameter D of the laser irradiation spot is proportional to a light source power of the laser and an exposure time, which is inversely proportional to a scanning speed of the laser.

16. The method of claim 15, wherein the laser has a source power of 50W to 1KW and a scanning speed of 0.1m/s to 8 m/s.

17. The method of claim 14, wherein the column distance and the dot distance are 100 μ ι η to 1000 μ ι η, respectively.

18. The method of claim 10, wherein the first porous layer is embossed.

19. The method according to claim 10, wherein the laser irradiation spot in the step of forming the second porous layer is provided so as not to overlap with the laser irradiation spot on the first porous layer.

20. A laminated porous member formed by the method of any one of claims 1 to 19.

21. An implant having increased bone contact rate and comprising the porous member of claim 20.

Technical Field

The present invention relates to a one-step manufacturing method of a laminate-molded porous member, and more particularly, to a method of manufacturing a porous member having a substrate layer and a porous layer in one step using a laminate molding technique, and to a manufacturing process of a porous member for increasing a bone contact rate of an implant.

Background

An implant refers to a material that reconstructs a shape or replaces a function by implanting an artificial material or a natural material into a lost portion to compensate for the loss of biological tissue. Generally, in dentistry or orthopaedics, an implant means a biomaterial replacing hard tissues of the human body, and research related to a dental implant has been actively conducted since the mid 1960 s.

The implant material is made of metal material with high strength, high hardness and low biological toxicity. Particularly, titanium and titanium alloys, as materials having excellent biocompatibility, not only have good biocompatibility with surrounding tissues, but also have greater corrosion resistance and less biotoxicity. Therefore, in the early stage of research on implants, titanium or titanium alloys were used as implants by simple machining.

The implant can be implanted into the missing part only when it is compatible with the existing biological tissue, and therefore most of the implant surface is coated with biological tissue adhesive. In particular, bone cement, which is a cement inducing rapid regeneration of bone tissue, has been used in the orthopedic field for complicated fracture repair and artificial joint surgery, which frequently occur due to traffic accidents and the like, and in dentistry for non-regenerative dentin repair.

However, the bioactive substance coated on the surface is dissolved too fast, and the high temperature generated during the coating process makes it difficult to expect the effect of the coating material. Furthermore, it has been reported that the material shed from the coating may interfere with the bonding of the bone or may cause side effects such as inflammation.

In order to solve this problem, a method of coating an implant having a porous structure on the surface to improve bone growth even without a binder has been proposed, and products using the method have been released.

However, this method also has a problem in the bonding between the implant and the porous structure, and requires an increase in the process of manufacturing a separate porous structure and then attaching it to the implant, which reduces productivity and increases the manufacturing cost of the implant.

3D printing, which has been actively performed recently, may be an alternative measure that can solve this problem. By using 3D printing, a metal material such as titanium which is generally used as a material for an implant can be laminated, and thus a new implant can be developed using this method.

Disclosure of Invention

In order to solve these problems, it is an object of the present invention to provide a method for manufacturing a porous member having a substrate layer and a porous layer by one-step lamination molding.

It is another object of the present invention to provide a method of reducing the processing time and controlling the shape and size of a porous layer when manufacturing a product including the porous member.

The technical objects to be achieved by the present invention are not limited to the above technical problems, and other technical objects not described herein will be clearly understood from the following description by those skilled in the art.

To achieve these objects, embodiments of the present invention provide a one-step manufacturing method of a laminated porous member, the method including the steps of: stacking the metal particles; repeatedly melting and cooling the metal particles by irradiating laser light to the metal particles of the stack, thereby forming a base material layer; forming a first porous layer by adjusting a pitch distance (pitch distance) and a dot distance while irradiating laser light to form a laser light irradiation dot having a predetermined diameter D on the base material layer; stacking the same metal particles as the metal particles on the first porous layer; and forming a second porous layer by adjusting the column distance and the dot distance while irradiating the laser light to form a laser light irradiation dot having a predetermined diameter D on the first porous layer.

In an embodiment of the present invention, the metal particles may be one or more selected from the group consisting of titanium (Ti), titanium (Ti) -based alloys, cobalt (Co) -based alloys, nickel (Ni) -based alloys, zirconium (Zr) -based alloys, barium (Ba) -based alloys, magnesium (Mg) -based alloys, vanadium (V) -based alloys, iron (Fe) -based alloys, and mixtures thereof.

In the embodiment of the present invention, in the step of forming the base material layer and the step of forming the first porous layer, the energy of the laser may be equal to or greater than the complete melting energy of the metal particles.

In the embodiment of the present invention, in the step of forming the first porous layer and the step of forming the second porous layer, the column distance and the point distance may be larger than the diameter D of the laser irradiation spot.

In an embodiment of the present invention, the diameter D of the laser irradiation spot may be proportional to a light source power (source power) of the laser and an exposure time, and the exposure time may be inversely proportional to a scanning speed of the laser.

In an embodiment of the invention, the source power of the laser may be 50W to 1KW and the scanning speed may be 0.1m/s to 8 m/s.

In an embodiment of the present invention, the column distance and the dot distance may be 100 μm to 1000 μm, respectively.

In one embodiment of the invention, the first porous layer may be gravure printed.

To achieve these objects, one embodiment of the present invention provides a one-step manufacturing method of a laminated porous member, the method including the steps of: stacking the metal particles; repeatedly melting and cooling the metal particles by irradiating laser light to the metal particles of the stack, thereby forming a base material layer; stacking metal particles same as the metal particles on the substrate layer; forming a first porous layer by adjusting a column distance and a point distance while irradiating laser light to form a laser light irradiation point having a predetermined diameter D on the metal particles stacked on the base material layer; stacking the same metal particles as the metal particles on the first porous layer; and forming a second porous layer by adjusting the column distance and the dot distance while irradiating the laser to form a laser irradiation dot having a predetermined diameter D on the metal particles stacked on the first porous layer.

In another embodiment of the present invention, the metal particles may be one or more selected from the group consisting of titanium (Ti), titanium (Ti) -based alloys, cobalt (Co) -based alloys, nickel (Ni) -based alloys, zirconium (Zr) -based alloys, barium (Ba) -based alloys, magnesium (Mg) -based alloys, vanadium (V) -based alloys, iron (Fe) -based alloys, and mixtures thereof.

In another embodiment of the present invention, in the step of forming the substrate layer, the energy of the laser may be equal to or greater than the complete melting energy of the metal particles.

In another embodiment of the present invention, in the step of forming the first porous layer and the step of forming the second porous layer, the energy of the laser may be equal to or greater than 0.2 times the full melting energy in a range equal to or less than the full melting energy of the metal particles.

In another embodiment of the present invention, in the step of forming the first porous layer and the step of forming the second porous layer, the column distance and the point distance may be larger than the diameter D of the laser irradiation spot.

In another embodiment of the present invention, the diameter D of the laser irradiation spot may be proportional to the light source power of the laser and the exposure time, and the exposure time may be inversely proportional to the scanning speed of the laser.

In another embodiment of the invention, the source power of the laser may be 50W to 1KW and the scanning speed may be 0.1m/s to 8 m/s.

In another embodiment of the present invention, the column distance and the dot distance may be 100 μm to 1000 μm, respectively.

In another embodiment of the invention, the first porous layer may be embossed (embossed).

In another embodiment of the present invention, the laser irradiation point in the step of forming the second porous layer may be disposed so as not to overlap with the laser irradiation point on the first porous layer.

In order to achieve the above object, another embodiment of the present invention provides a laminate-formed porous member formed by the method.

To achieve the above objects, another embodiment of the present invention provides an implant having an increased bone contact rate and including a porous member.

Drawings

Fig. 1 is a flowchart showing a one-step manufacturing method of a laminate-formed porous member according to an embodiment of the present invention;

fig. 2 is a view showing a laser irradiation method in forming a porous layer according to the present invention;

fig. 3 is a view showing a laser irradiation method in forming a porous layer according to the present invention;

fig. 4 is a diagram showing a column distance and a point distance of laser irradiation points according to the present invention;

FIG. 5 is a schematic view showing a one-step manufacturing method of a laminated porous member;

FIG. 6 is a flow chart showing a one-step method of manufacturing a laminate-formed porous member according to another embodiment of the present invention;

FIG. 7 is a schematic view showing a one-step manufacturing method of a laminate-formed porous member according to another embodiment of the present invention;

fig. 8 is a schematic view vertically showing a laser irradiation point according to the present invention; and

FIG. 9 is a diagram of a surface of a porous layer according to one embodiment of the invention.

Detailed Description

The invention will be described below with reference to the accompanying drawings. However, the present invention may be modified in various different ways and is not limited to the embodiments described herein. Further, in the drawings, in order to clearly describe the present invention, parts irrelevant to the description will be omitted, and like reference numerals will be used throughout the specification to describe like parts.

Throughout the specification, when an element is referred to as being "connected to" (coupled, contacted) with another element, it may be "directly connected" to the other element or "indirectly connected" to the other element with a space between the two elements. Furthermore, unless explicitly described otherwise, any element "comprising" is to be understood as meaning including, but not excluding, other elements.

The terminology used in the description is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the invention. The singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The following describes a one-step method for producing a laminated porous member.

Referring to fig. 1, an embodiment of the present invention provides a one-step manufacturing method of a laminated porous member, the method including the steps of: stacking metal particles (S100); repeatedly melting and cooling the metal particles by irradiating laser to the metal particles of the stack, thereby forming a base material layer (S200); forming a laser irradiation point having a predetermined diameter D on the base material layer by adjusting the column distance and the point distance while irradiating the laser, thereby forming a first porous layer (300); stacking metal particles identical to the metal particles on the first porous layer (S400); and forming a second porous layer (500) by adjusting the column distance and the dot distance while irradiating the laser light to form a laser light irradiation dot having a predetermined diameter D on the first porous layer.

The metal particles may be one or more selected from the group consisting of titanium (Ti), titanium (Ti) -based alloys, cobalt (Co) -based alloys, nickel (Ni) -based alloys, zirconium (Zr) -based alloys, barium (Ba) -based alloys, magnesium (Mg) -based alloys, vanadium (V) -based alloys, iron (Fe) -based alloys, and mixtures thereof.

Specifically, titanium and titanium-based alloys are materials having excellent biocompatibility, which are known to have not only good biocompatibility with surrounding tissues but also greater corrosion resistance and less biotoxicity, and thus they are preferable. However, the present invention is not limited thereto, and the above-described metal particles may be selectively used.

In the step of forming the base material layer and the step of forming the first porous layer, the energy of the laser may be equal to or greater than the complete melting energy of the metal particles.

In the step of forming the second porous layer, the energy of the laser may be equal to or greater than 0.2 times the full melting energy in a range equal to or less than the full melting energy of the metal particles.

When energy greater than the full melting energy is applied to the metal particles, the metal particles may be completely melted and densified. When a small amount of energy is applied to the metal particles, the metal particles may be formed in a porous type without densification.

That is, in forming the base material layer and the second porous layer of the present invention, the base material layer can be densified by inputting energy equal to or more than the full melting energy, and the second porous layer can be formed into a porous type by inputting energy equal to or more than 0.2 times the full melting energy in a range equal to or less than the full melting energy. The porosity is another factor of the porous structure separated from the column distance and the point distance by adjusting the laser light irradiation while forming the laser light irradiation point. When the energy of the laser is less than 0.2 times the full melting energy of the metal particles, the metal particles are not melted, and thus it is not preferable.

The porous layer is formed by forming the first porous layer, and energy equal to or greater than the complete melting energy of the metal particles is input. This is because: the first porous layer is formed by irradiating laser light to the base material layer, and the base material layer has already been densified, so to melt these layers again to form a porous structure, energy equal to or greater than full melting energy is required.

In the step of forming the first porous layer and the step of forming the second porous layer, the column distance and the point distance may be larger than the diameter D of the laser irradiation spot.

Referring to fig. 2 and 3, the manner of irradiating laser light of the present invention can be seen. Fig. 2 shows a laser irradiation pattern in the co-lamination. In the present invention, the laser is irradiated to the base material layer in the manner shown in fig. 2. The spot distance PD becomes smaller than the diameter D of the laser irradiation spot, and thus the laser irradiation spots partially overlap each other. Fig. 3 shows a laser irradiation pattern in forming the porous layer of the present invention, in which the spot distance PD becomes larger than the diameter D, and thus laser irradiation spots do not overlap each other. Therefore, the metal particles are melted only at the laser irradiation point, and a porous structure is formed.

Fig. 4 shows the column distance and the dot distance when the porous layer of the present invention is formed. By adjusting not only the dot distances but also the column distances, the laser irradiation dots can be prevented from overlapping each other.

The diameter D of the laser irradiation spot may be proportional to the light source power and the exposure time of the laser, and the exposure time may be inversely proportional to the scanning speed of the laser.

The source power of the laser may be 50W to 1KW, and the scanning speed may be 0.1m/s to 8 m/s. The conditions of the light source power and the scanning speed may depend on the kind of the metal particles and the structure of the porous layer to be formed. For example, when pure titanium is used to form a substrate layer requiring high density formation, energy of 5.5J to 6.5J or more per cubic millimeter should be provided, which can be achieved at a scanning speed of 0.25m/s at a light source power of 100W or more.

When the porous layer is formed, energy equal to or less than the full melting energy may be irradiated, so that the light source power can be reduced at the same scanning speed. Further, it is also possible to increase the scanning speed while maintaining the power of the light source, thereby increasing the spot distance of laser irradiation. However, when the scanning speed is excessively increased, the exposure time of the laser may be reduced and the diameter of the laser irradiation spot may become excessively small, so it is preferable to adjust the scanning speed within the above range.

The column distance and the dot distance may be 100 μm to 1000 μm, respectively. When the dot distance is less than 100 μm, the diameter D of the laser irradiation dot which should be less than the dot distance is too small, and thus the workability becomes poor. When the spot distance exceeds 1000 μm, the diameter D of the laser irradiation spot should be increased accordingly to enable the formation of the porous layer. For this purpose, the laser light source power should also be increased, and therefore, this is not preferable. Further, when the dot distance exceeds 1000 μm, there is another problem: the porous layer has a small specific surface area.

The first porous layer may be gravure printed. Referring to fig. 5, a base material layer 510 is formed in (a) of fig. 5, and then a first porous layer 520 can be formed by irradiating a laser 540 in (b) of fig. 5. The first porous layer 520 is formed by melting a portion of the base material layer 510, and thus is gravure-printed. When the laser 540 having a strong light source power is irradiated to the surface of the base material layer 510, the surface irradiation is reduced, and thus the first porous layer 520 is gravure-printed.

Referring to (c) of fig. 5, the second porous layer 530 is formed by layering metal particles on the first porous layer and then irradiating a laser 540.

Referring to fig. 6, one embodiment of the present invention provides a one-step manufacturing method of a laminated porous member, the method including the steps of: stacking metal particles (S110); repeatedly melting and cooling the metal particles by irradiating laser to the metal particles of the stack to form a base material layer (S220); stacking metal particles identical to the metal particles on a substrate layer (S330); forming a laser irradiation point having a predetermined diameter D on the metal particles stacked on the base material layer by adjusting the column distance and the point distance while irradiating the laser, thereby forming a first porous layer (S440); stacking metal particles identical to the metal particles on the first porous layer (S550); and forming a second porous layer by adjusting the column distance and the dot distance while irradiating the laser to form a laser irradiation dot having a predetermined diameter D on the metal particles stacked on the first porous layer (S660).

The metal particles may be one or more selected from the group consisting of titanium (Ti), titanium (Ti) -based alloys, cobalt (Co) -based alloys, nickel (Ni) -based alloys, zirconium (Zr) -based alloys, barium (Ba) -based alloys, magnesium (Mg) -based alloys, vanadium (V) -based alloys, iron (Fe) -based alloys, and mixtures thereof.

Specifically, titanium and titanium-based alloys are materials having excellent biocompatibility, which are known to have not only good biocompatibility with surrounding tissues but also greater corrosion resistance and less biotoxicity, and thus they are preferable. However, the present invention is not limited thereto, and the above-described metal particles may be selectively used.

In the step of forming the substrate layer, the laser may have an energy equal to or greater than a full melting energy of the metal particles.

In the steps of forming the first porous layer and forming the second porous layer, the energy of the laser may be equal to or greater than 0.2 times the full melting energy in a range equal to or less than the full melting energy of the metal particles.

When energy greater than the full melting energy is applied to the metal particles, the metal particles may be completely melted and densified. When a small amount of energy is applied to the metal particles, the metal particles may be formed in a porous type without densification.

That is, when the base material layer and the porous layer of the present invention are formed, the base material layer can be densified by inputting energy equal to or more than the full melting energy, and the porous layer can be formed into a porous type by inputting energy equal to or more than 0.2 times the full melting energy in a range equal to or less than the full melting energy. The porosity is another factor of the porous structure separated from the column distance and the point distance by adjusting the laser light irradiation while forming the laser light irradiation point. When the energy of the laser is less than 0.2 times the full melting energy of the metal particles, the metal particles are not melted, and thus it is not preferable.

In the step of forming the first porous layer and the step of forming the second porous layer, the column distance and the dot distance may be larger than the diameter D of the laser irradiation dot. As can be seen with reference to fig. 3 and 4, the porous layer may be formed at a column distance and a point distance greater than the diameter D of the laser irradiation spot.

The diameter D of the laser irradiation spot may be proportional to the light source power and the exposure time of the laser, and the exposure time may be inversely proportional to the scanning speed of the laser.

The source power of the laser may be 50W to 1KW, and the scanning speed may be 0.1m/s to 8 m/s. The conditions of the light source power and the scanning speed may depend on the kind of the metal particles and the structure of the porous layer to be formed. For example, when pure titanium is used to form a substrate layer requiring high density molding, 5.5J to 6.5J or more per cubic millimeter should be provided, and the light source power at a scanning speed of 0.25m/s should be 100W.

When forming the porous region, energy equal to or less than the full melting energy may be irradiated, so that the light source power can be reduced at the same scanning speed. Further, it is also possible to increase the scanning speed while maintaining the power of the light source, thereby increasing the spot distance of laser irradiation. However, when the scanning speed is excessively increased, the exposure time of the laser may be reduced and the diameter of the laser irradiation spot may become excessively small, so it is preferable to adjust the scanning speed within the above range.

The column distance and the dot distance may be 100 μm to 1000 μm, respectively. When the dot distance is less than 100 μm, the diameter D of the laser irradiation dot which should be less than the dot distance is too small, and thus the workability becomes poor. When the spot distance exceeds 1000 μm, the diameter D of the laser irradiation spot should be increased accordingly to enable the formation of the porous layer. For this purpose, the laser light source power should also be increased, and therefore, this is not preferable. Further, when the dot distance exceeds 1000 μm, there is another problem: the porous layer has a small specific surface area.

The first porous layer may be embossed. Referring to fig. 7, a base material layer 710 is formed in (a) of fig. 7, and then a first porous layer 720 may be formed by layering metal particles and irradiating laser 740 in (b) of fig. 7. Since the first porous layer 720 is formed by stacking metal particles and then irradiating the laser 740, the first porous layer 720 is embossed. In (c) of fig. 7, the second porous layer 730 may be formed by layering metal particles on the first porous layer and irradiating laser.

The laser irradiation point in the step of forming the second porous layer may be set so as not to overlap with the laser irradiation point on the first porous layer.

Referring to fig. 8, the first porous layer 720 is formed according to the laser irradiation point, and then, when the second porous layer 730 is formed on the first porous layer, the laser irradiation point of the second porous layer 730 does not overlap with the laser irradiation point of the first porous layer 720, as shown in fig. 7 (a) or fig. 7 (b). Therefore, it is possible to secure the strength of the porous structure and further increase the specific surface area of the porous layer.

The invention also provides a laminate-formed porous member produced by the method. The laminate-formed porous member according to the present invention has the integrated substrate layer-porous layer, and therefore, the manufacturing time is reduced and the manufacturing process is simple as compared with the existing product formed using the porous coating layer.

The present invention also provides an implant having increased bone contact rate and including a porous member. The porous member according to the present invention has a plurality of pores having a diameter of 50 to 200 μm, and thus improves bone contact rate and bone growth compared to an implant using a biological tissue adhesive such as a bone adhesive. Further, since the porous layer is integrally formed, an implant more excellent in strength and durability can be provided.

The present invention is described in more detail below with reference to preferred embodiments. It should be noted, however, that the present invention is not limited thereto, and the embodiments are merely examples.

< example 1>

The pure titanium particles were layered, and the base material layer was formed by irradiating laser light at a scanning speed of 0.5m/s and a light source power of 200W. Laser irradiation spots having a diameter of 70 μm were formed on the base material layer by gravure-printing the first porous layer while irradiating laser light by adjusting the column distance and the dot distance to 350 μm each. The second porous layer was formed by stacking pure titanium particles again on the first porous layer and adjusting the column distance and the point distance each to 350 μm while irradiating laser light to form a laser light irradiation point having a diameter of 70 μm.

< example 2>

The pure titanium particles were layered, and the base material layer was formed by irradiating laser light at a scanning speed of 0.5m/s and a light source power of 200W. The first porous layer was embossed by stacking pure titanium particles on the base material layer and adjusting the column distance and the point distance each to 350 μm while irradiating laser light to form a laser irradiation point having a diameter of 70 μm on the base material layer. The second porous layer was formed by stacking pure titanium particles again on the first porous layer and adjusting the column distance and the point distance each to 350 μm while irradiating laser light to form a laser irradiation point having a diameter of 70 μm.

Table 1 below shows laser irradiation conditions when the first porous layer and the second porous layer were formed in examples 1 and 2.

[ Table 1]

Fig. 9 is a view of the surface of the first porous layer formed in example 2.

When the porous layer is formed according to the manufacturing method of the porous member of the present invention, laser irradiation conditions, such as a scanning speed, a light source power, and an exposure time, are set according to the kind and structure of the metal particles, whereby an implant to be mounted to a skeleton of a patient can be easily designed.

According to an embodiment of the present invention, it is possible to reduce the manufacturing time when manufacturing a product using one-step lamination molding, and it is also possible to provide a porous member in which the shape and size of a porous layer can be controlled.

Further, the implant including the porous member has an increased bone contact rate, so that bone growth between bones can be improved, and a product suitable for a skeleton of an individual patient can be easily designed.

The effects of the present invention are not limited thereto, and it should be understood that the effects include all effects that can be inferred from the structures of the present invention described in the following specification or claims.

The above description is provided as an exemplary embodiment of the present invention, and it should be understood that those skilled in the art may easily modify the present invention in other various ways without changing the spirit or essential features of the present invention. The above embodiments are therefore examples only and should not be construed as limiting in all aspects. For example, individual components may be divided and separate components may be integrated.

The scope of the present invention is defined by the following claims, and all changes and modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention.