Method for surface treatment of implant using laser processing

Abstract

The present invention relates to a method for surface treatment of an implant and, more specifically, to a method for surface treatment of an implant, in which, by using laser processing, the surface of a dental implant can be repeatedly formed in the same pattern that exhibits excellent osseointegration, and thus the quality of implant surface treatment can be greatly increased and the success rate of osseointegration can be improved.

Description

Method for surface treatment of implants using laser processing

[0001] The present invention relates to a method for surface treatment of an implant, and more specifically, to a method for surface treatment of an implant that can repeatedly form the surface of a dental implant in an identical pattern with excellent osseointegration using laser processing, thereby greatly improving the quality of the implant surface treatment and enhancing the success rate of osseointegration.

[0002] Implant is one of the dental treatments, and is one of the treatments performed after tooth extraction, which is the final treatment for cavities or periodontal disease.

[0003] In general, implants are treated by inserting the implant body, which is made in the shape of a screw, into the jawbone, attaching an abutment on top of it, and then covering the abutment with a crown, which is an artificial tooth.

[0004] Unlike conventional bridge prosthesis manufacturing methods, it has the advantage of restoring the function and aesthetics of teeth without damaging adjacent healthy teeth.

[0005] In particular, if you have lost a lot of molars, you have to wear partial dentures, but if you use implants, you don't need to use partial dentures. The gums and jawbone in the area where teeth are missing gradually absorb and shrink over time, but if you get implants, you can prevent that.

[0006] Meanwhile, the most important thing in implant treatment is that the implant becomes one with the jawbone after being planted in it. If this osseointegration of the implant is not properly achieved, the implant may become loose in the jawbone, causing inflammation, making it impossible to recover masticatory power (the power to chew food), and in severe cases, the implant may fall out.

[0007] In the past, in order to improve the osseointegration of implants, the surface of the implant was treated through physical and chemical methods such as SLA (sandblasted, large-grit, acid-etched), RBM (Resorbable Blast Media), anodizing, and etching. These surface treatment methods include sandblasting, which forms an arbitrary pattern by spraying a large number of beads at a high speed, and cleaning and adjusting the average surface roughness (Ra).

[0008] Meanwhile, all of these surface treatment methods include an acid washing process, so they go through a washing process to remove residual acid on the surface. If residual acid remains on the surface due to problems such as the worker's carelessness in controlling the concentration of the washing solution, it can cause the surrounding bone to melt after implant placement or cause major problems such as an inflammatory reaction, which can lead to implant failure.

[0009] In addition, conventional physical and chemical surface treatments have limitations in improving osseointegration because the porosity and roughness of the implant surface are randomly formed, making it difficult to form the same pattern even under the same conditions.

[0010] The present invention has been devised to solve the above-described problems, and the purpose of the present invention is to provide a method for surface treatment of an implant capable of maximizing the effect of osseointegration by forming the same, repeatable pattern on the surface of the implant into a pattern with excellent osseointegration.

[0011] In addition, the purpose of the present invention is to provide a method for treating the surface of an implant that fundamentally eliminates the problem of residual acid remaining on the surface of the implant, thereby preventing the surrounding bone from dissolving or causing inflammation due to the residual acid.

[0012] In addition, another object of the present invention is to provide a method for surface treatment of an implant, which can increase the success rate of implant surgery by minimizing the generation of frictional heat during implantation and preventing the occurrence of wounds on the bone by not performing surface treatment on the portion of the surface screw thread of the implant that is directly inserted into the jawbone.

[0013] In order to achieve the above object, the present invention provides a method for surface treatment of an implant using laser processing, characterized by including the steps of: performing a physical and chemical treatment on the surfaces of a plurality of implants while varying the treatment conditions to form different porosities and roughnesses; photographing the surface patterns of surface-treated implants; performing a clinical test on the surface-treated implants to select the implant with the best osseointegration; and completing the surface treatment of the implant by laser processing the surface of the implant that has not been surface-treated with the surface pattern of the selected implant.

[0014] In a preferred embodiment, the physical and chemical treatment conditions include bead size, bead injection pressure and injection time in the sandblasting process, and the type of acid and washing time in the acid washing process.

[0015] In a preferred embodiment, the laser processing is performed only on the screw threads and screw bone of the portion of the screw threads of the implant surface that is not inserted into the bone, excluding the portion that is inserted into the bone.

[0016] In addition, the present invention further provides an implant surface-treated by the above surface treatment method.

[0017] The present invention has the following excellent effects.

[0018] First, according to the surface treatment method of the implant of the present invention, there is an advantage in that the surface pattern best for osseointegration can be repeatedly formed on the implant through laser processing, and the problem of residual acid remaining on the implant can be fundamentally prevented.

[0019] In addition, according to the surface treatment method of the implant of the present invention, the screw thread portion that is implanted by directly contacting the jawbone is not roughened, so that heat and wounds generated in the bone during implantation can be reduced, and thus there is an advantage of greatly improving the success rate of osseointegration.

[0020] Figure 1 is a flow chart showing a surface treatment method of an implant according to one embodiment of the present invention;

[0021] FIG. 2 is a drawing for explaining a portion where a pattern is formed on the outer surface of an implant and a portion where a pattern is not formed in a surface treatment method of an implant according to one embodiment of the present invention.

[0022] [Explanation of symbols]

[0023] 100: Implant

[0024] 100a: The part of the screw that is inserted into the bone

[0025] 100b: The part of the screw that is not inserted into the bone

[0026] 100c: Screw

[0027] The terms used in the present invention are selected from the most widely used general terms as much as possible, but in certain cases, there are terms arbitrarily selected by the applicant. In such cases, the meaning should be understood by considering the meaning described or used in the detailed description of the invention, rather than the simple name of the term.

[0028] Hereinafter, the technical configuration of the present invention will be described in detail with reference to preferred embodiments illustrated in the attached drawings.

[0029] However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like reference numbers designate like elements throughout the specification.

[0030] Figure 1 is a flowchart showing a method for surface treatment of an implant according to one embodiment of the present invention.

[0031] Referring to FIG. 1, a surface treatment method of an implant according to one embodiment of the present invention is a method capable of forming a pattern that promotes good osseointegration on the surface of an implant in an identical and repeated manner.

[0032] First, implants (10, 20, 30) that have not been surface treated are prepared (S1000).

[0033] In addition, the above implants are made of titanium and are implant bodies that are implanted into the jawbone and have screw threads formed on the outer surface.

[0034] However, the material of the above implants is not limited to titanium.

[0035] Next, the above implants (10, 20, 30) are each subjected to physical and chemical treatment (S2000).

[0036] Here, physical and chemical treatment means treatment such as SLA (sandblasted, large-grit, acid-etched), RBM (Resorbable Blast Media), anodizing, and etching. In particular, SLA treatment is a surface treatment method in which porosity is provided by spraying beads (41) on the surface of an implant (10) using a sandblasting machine (40), and then treating the implant (11) with the formed porosity with acid (50) to adjust the surface roughness (Ra).

[0037] In addition, the surface treatment of each of the above implants (10, 20, 30) is performed under different physical and chemical surface treatment conditions.

[0038] In addition, the above processing conditions include the bead size, bead injection pressure and injection time in the sandblasting process, and the type of acid (nitric acid, sulfuric acid, hydrochloric acid, etc.) and washing time in the acid washing process.

[0039] That is, implants that have been physically and chemically treated under different processing conditions are manufactured.

[0040] Next, the surface patterns (P1, P2, P3) of implants (10a, 20a, 30a) with different surface patterns are photographed (S3000).

[0041] Next, the above implants (10a, 20a, 30a) are implanted into the patient to perform clinical trials, and the implant (10a) with the best osseointegration is selected (S4000).

[0042] That is, the goal is to find which surface pattern is the best pattern (P1) for osseointegration.

[0043] Next, the surface of the untreated implant (100) is processed into the best pattern (P1) for osseointegration using a laser processing machine (60) to complete the surface treatment (S5000).

[0044] In the case of conventional physical and chemical surface treatment, the pattern is formed arbitrarily and only the average surface roughness (Ra) is controlled, so the pattern with the best osseointegration cannot be repeatedly formed into an implant. On the other hand, the surface treatment method of the present invention can repeatedly form the pattern with the best osseointegration (P1), so it has the advantage of greatly improving the success rate of osseointegration.

[0045] In addition, conventional physical and chemical surface treatment methods create roughness on both the screw thread and screw bone of the implant, so when implanting the implant, a lot of heat is generated in the screw thread area that directly contacts the jawbone, and wounds are created in the bone, causing inflammation, which lowers the success rate of osseointegration.

[0046] Referring to FIG. 2, which is a drawing for explaining a portion where a pattern is formed on the outer surface of an implant and a portion where no pattern is formed in a surface treatment method of an implant according to one embodiment of the present invention, a more detailed description will be given below.

[0047] As described above, when the implant (100) is implanted into the bone (1), it can be divided into a screw thread portion (100a) that directly digs into the bone and makes contact with it, a screw thread portion (100b) that is not directly inserted into the bone, and a screw bone (100c).

[0048] That is, the conventional physical and chemical surface treatment creates roughness even on the screw thread portion (100a) inserted into the bone (1), so when the implant (100) rotates and is inserted into the bone (1), a large amount of frictional heat is generated and the bone is damaged, which makes it difficult to achieve osseointegration due to inflammation.

[0049] However, the implant surface treatment method of the present invention can perform laser processing with a selected surface pattern (P1) by setting only the screw thread portion (100b) and screw bone portion (100c) that are not inserted into the bone (1) as the processing area (a) when performing laser processing, thereby reducing frictional heat and wounds generated during implant placement and significantly improving the success rate of osseointegration.

[0050] Therefore, according to the surface treatment method of the implant of the present invention, heat and wounds generated in the bone during implantation can be reduced, and the surface pattern best for osseointegration can be repeatedly formed on the surface of the implant, thereby greatly improving the success rate of implant surgery.

[0051] As described above, the present invention has been illustrated and described with reference to preferred embodiments, but is not limited to the above embodiments, and various changes and modifications may be made by a person skilled in the art to which the invention pertains within a scope that does not depart from the spirit of the present invention.

Claims

1. A step of performing a physical and chemical treatment on the surface of multiple implants, and varying the treatment conditions to form different porosities and roughnesses; A step of photographing the surface pattern of surface-treated implants; A step of performing clinical trials on surface-treated implants to select the implant with the best osseointegration; and A method for surface treatment of an implant using laser processing, characterized in that it comprises a step of completing the surface treatment of an implant by laser processing an untreated implant surface with a surface pattern of a selected implant.

2. In paragraph 1, A method for surface treatment of an implant using laser processing, characterized in that the above physical and chemical treatment conditions include bead size, bead spraying pressure and spraying time in a sandblasting process, and acid type and washing time in an acid washing process.

3. In paragraph 2, A method for surface treatment of an implant using laser processing, characterized in that the above laser processing is performed only on the screw threads and screw bone in the part of the screw threads of the implant surface that is not inserted into the bone, excluding the part that is inserted into the bone.

4. An implant surface-treated using any one of the surface treatment methods of clauses 1 to 3.

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