WO2023022302A1 - 표면 처리된 임플란트 구조체 - Google Patents
표면 처리된 임플란트 구조체 Download PDFInfo
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- WO2023022302A1 WO2023022302A1 PCT/KR2021/017891 KR2021017891W WO2023022302A1 WO 2023022302 A1 WO2023022302 A1 WO 2023022302A1 KR 2021017891 W KR2021017891 W KR 2021017891W WO 2023022302 A1 WO2023022302 A1 WO 2023022302A1
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- WIPO (PCT)
- Prior art keywords
- implant structure
- outer circumferential
- circumferential surface
- implant
- laser
- Prior art date
Links
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Images
Classifications
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- A61C8/0013—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy with a surface layer, coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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- A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
- A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
Definitions
- the present invention relates to a surface-treated implant structure.
- An implant is used for a treatment that restores the function of a bone using a material that is harmless to the human body.
- conventional implants are used for indications related to bone tissue in dentistry, orthopedics, and the like.
- dental implants are used to restore the function of teeth by fixing artificial teeth after implanting a fixture made of a material that does not cause rejection by the human body to replace the lost tooth root in the alveolar bone where the tooth has been removed. .
- implants can prevent damage to surrounding dental tissue and can be used stably because there is no secondary caries occurrence factor.
- implants have the same structure as natural teeth, so there is no pain and foreign body sensation in the gums, and there is an advantage that they can be used semi-permanently if managed well.
- metals eg, titanium (Ti), Co-Cr, SS, Gold, etc.
- ceramics eg, zirconia, alumina, etc.
- polymers eg, PMMA
- One aspect is to provide an implant structure comprising a fixture serving as an artificial tooth root, wherein the fixture includes nano-protrusions having a certain level of height and aspect ratio on its surface.
- One aspect is an implant structure comprising a fixture that serves as an artificial tooth root, wherein the fixture is machined with a femtosecond laser and includes an outer circumferential surface having a structure that is higher or lower than the non-machined surface. To provide an implant structure will be.
- One aspect is an implant structure including a fixture that serves as an artificial tooth root, wherein the fixture is disposed above a cylindrical bone contact portion 111 including a first outer circumferential surface in which a thread is formed and the bone contact portion A gingival contact portion 112 including a second outer circumferential surface, wherein the first outer circumferential surface or the second outer circumferential surface includes a plurality of nano-protrusions having a width of 10 to 1000 nm and an aspect ratio of 1000:1 to 1:50
- an implant structure is provided.
- One aspect is an implant structure including a fixture that serves as an artificial tooth root, wherein the fixture is disposed above a cylindrical bone contact portion 111 including a first outer circumferential surface in which a thread is formed and the bone contact portion It includes a gingival contact portion 112 including a second outer circumferential surface, wherein the first outer circumferential surface or the second outer circumferential surface includes nanoprotrusions having a height of 50 to 200 nm and an aspect ratio of 50: 1 to 1:50, An implant structure is provided.
- the fixture 110 constituting the implant structure may be provided integrally with or separated from the abutment 140, and the bone contact portion 111 including an outer circumferential surface in which threads are formed and the gingiva It may be provided to include all of the contact parts 112 .
- the nano-protrusions may be arranged in a state where the surface of the implant structure in a state in which nano-protrusions are not formed is located between adjacent nano-protrusions.
- the term “width” means the distance between the centers of ends of adjacent nano-protrusions included in the surface of the implant structure.
- the width may be 1 to 2000 nm, 1 to 1000 nm, 5 to 1000 nm, 10 to 1000 nm, 100 to 1000 nm, 10 to 500 nm, or 10 to 100 nm.
- the nanoprotrusions having a width of 1 to 2000 nm may impart unique surface characteristics and functionality to the first outer circumferential surface or the second outer circumferential surface of the implant structure, wherein the functionality may be an antibacterial effect or an osseointegration promoting effect.
- the width between the adjacent nano-protrusions and the horizontal (horizontal) length or vertical (longitudinal) length of the nano-protrusions are 1:1 to 100:1, 1:1 to 50:1, or 1:1 to 1:1. It can be provided in a ratio of 10:1.
- the term "aspect ratio" refers to the ratio between the width and height of nano-protrusions included on the surface of an implant structure.
- the aspect ratio is 1000:1 to 1:50, 500:1 to 1:50, 200:1 to 1:50, 100:1 to 1:50, 50:1 to 1:50, 40: 1 to 1:40, 30:1 to 1:30, or 20:1 to 1:20 may be provided.
- the nanoprotrusions having an aspect ratio of 1000:1 to 1:50 may impart unique surface characteristics and functionality to the first outer circumferential surface or the second outer circumferential surface of the implant structure, wherein the functionality may be an antibacterial effect or an osseointegration promoting effect.
- the first outer circumferential surface or the second outer circumferential surface may be used interchangeably with the surface of the implant structure.
- the implant structure is 1:1 to 1:50, 1:1 to 1:45, 1:1 to 1:40, 1:1 to 1:35, 1:1 to 1:30; 1:1 to 1:25, 1:1 to 1:20, 1:1 to 1:15, 1:1 to 1:10, 1:10 to 1:50, 1:10 to 1:45, 1: An aspect ratio of 10 to 1:40, 1:10 to 1:35, 1:10 to 1:30, 1:10 to 1:25, 1:10 to 1:20, or 1:10 to 1:15
- the surface of the implant structure may exhibit an antibacterial effect of killing germs such as bacteria.
- the implant structure is 1000:1 to 1:1, 100:1 to 1:1, 50:1 to 1:1, 40:1 to 1:1, 30:1 to 1:1, 20:1 to 1:1, 10:1 to 1:1, 1000:1 to 10:1, 100:1 to 10:1, 50:1 to 10:1, 40:1 to 10:1, 30:
- the surface of the implant structure may exhibit an osseointegration promoting effect.
- an implant structure having a plurality of nano-protrusions having an aspect ratio of 1000:1 to 10:1 in the case of a linear shape and an aspect ratio of 1:1 to 1:50 in the case of a lattice shape according to a processing type among surface treatment conditions. can be provided.
- the nano-protrusion shape of the second outer circumferential surface promotes the death of bacteria present on the surface of the implant, and has a width of 10 to 100 nm and an aspect ratio of 1:50 to 1:1 or a width of 100 to 1000 nm. And it may be provided with an aspect ratio of 1:1 to 1:50. In addition, the nano-protrusion shape of the second outer peripheral surface may be provided with a height of 100 to 200 nm and an aspect ratio of 1:1 to 1:50.
- the nano-projection may be provided with a flat end (blunt) shape.
- the term “blunt” refers to a case in which a value obtained by multiplying the "horizontal ratio of the nanoprotrusion” and the “curvature of the end of the nanoprotrusion” is -2 to +2.
- the curvature may be -2 to +2, -1 to +1, or -0.5 to +0.5, but is not limited thereto.
- the end of the nano-protrusion when a value obtained by multiplying the "horizontal length of the nano-protrusion" and the “curvature of the end of the nano-protrusion" is +2, the end of the nano-protrusion may have a hemispherical shape.
- the end of the nano-protrusion when the end of the nano-protrusion does not form a curvature or is less than a certain curvature, it may be provided in a pointed shape.
- the arithmetic average roughness (Ra) value of the surface of the second outer circumferential surface may be in the range of 1.0 to 5.0 ⁇ m. 3.0 ⁇ m, 1.00 to 2.0 ⁇ m, 2.0 to 5.0 ⁇ m, 2.0 to 4.0 ⁇ m, 2.0 to 3.0 ⁇ m, 3.0 to 5.0 ⁇ m, or 3.0 to 4.0 ⁇ m.
- the arithmetic average roughness of the surface as described above may contribute to promoting the death of bacteria present on the implant surface.
- arithmetic mean roughness (Ra) refers to the arithmetic mean height of the roughness curve, and the parameter value may be defined according to the ISO 25178-2:2012 standard.
- the nano-protrusion shape of the first outer peripheral surface is to promote osseointegration with the implant, and may be provided with a width of 10 to 1000 nm and an aspect ratio of 1000:1 to 1:1.
- the nano-protrusions on the first outer circumferential surface may have a width of 10 to 1000 nm and an aspect ratio of 100:1 to 1:1.
- the nano-protrusions on the first outer circumferential surface may have a height of 50 to 200 nm and an aspect ratio of 1000:1 to 1:1.
- the arithmetic mean roughness (Ra) value of the surface of the first outer circumferential surface may be in the range of 0.5 to 3.0 ⁇ m. 1.0 ⁇ m, 1.0 to 3.0 ⁇ m, 1.0 to 2.5 ⁇ m, 1.0 to 2.0 ⁇ m, or 2.0 to 3.0 ⁇ m.
- the arithmetic average roughness of the surface as described above may contribute to promoting osseointegration with the implant.
- the nano-protrusions included in the first outer circumferential surface and the second outer circumferential surface may be provided with different aspect ratios.
- the bone contact portion including the first outer circumferential surface may include protrusions having a surface property for promoting osseointegration, that is, an aspect ratio range of 1000:1 to 1:1, and may include the second outer circumferential surface.
- the gingival contact portion may include nanoprotrusions having surface properties for exhibiting an antibacterial effect, that is, an aspect ratio ranging from 1:1 to 1:50.
- the implant structure may be surface-treated with a femtosecond laser.
- the surface treatment may include irradiating a femtosecond laser beam having a laser intensity of 1 to 5 W to the surface of the first outer circumferential surface or the second outer circumferential surface one or more times in a linear or grid pattern.
- an implant structure including a fixture serving as an artificial tooth root, wherein the fixture includes a cylindrical bone contact portion 111 including a threaded outer circumferential surface, and the outer circumferential surface has a thickness of 10 to 1000 nm.
- the fixture 110 constituting the implant structure may be provided integrally with or separated from the abutment 140, and consists of a bone contact portion 111 including an outer circumferential surface in which threads are formed.
- the bone contact portion 111 may include a bone formation promoting region 113 and an antibacterial activity promoting region 114, or may be composed of a bone formation promoting region 113 and an antibacterial activity promoting region 114, ,
- the antibacterial activity promoting region 113 may be located on top of the bone formation promoting region 114 or on top of the bone contact portion 111 .
- the bone formation promoting area 114 is 1:1 to 1:50, 1:1 to 1:45, 1:1 to 1:40, 1:1 to 1:35, 1:1 to 1:35, 1:1 to the surface.
- It may include a plurality of nano-protrusions having an aspect ratio of 15.
- the antibacterial activity promoting region 113 is 1000: 1 to 1: 1, 100: 1 to 1: 1, 50: 1 to 1: 1, 40: 1 to 1: 1, 30: 1 to 1: 1 on the surface. 1 to 1:1, 20:1 to 1:1, 10:1 to 1:1, 1000:1 to 10:1, 100:1 to 10:1, 50:1 to 10:1, 40:1 to It may include a plurality of nano-protrusions having an aspect ratio of 10:1, 30:1 to 10:1, or 20:1 to 10:1.
- the implant structure may be surface-treated with a femtosecond laser, and antibacterial activity having a plurality of nano-protrusions having an aspect ratio of 1000: 1 to 10: 1 in the case of a linear shape depending on the processing form among surface treatment conditions
- a promoting region may be provided, and in the case of a lattice shape, a bone formation promoting region having a plurality of nano-protrusions having an aspect ratio of 1:1 to 1:50 may be provided.
- the nano projections of the antibacterial activity promoting region 114 may have flat ends.
- the antibacterial activity promoting region 114 may be formed in a range of 0.1 to 3.0 mm in the direction of the bone formation promoting region 113 from the top of the bone contact portion 111 .
- the length of the antimicrobial activity promoting region 114 is 0.1 to 3.0 mm, for example, 0.1 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, in the direction of the bone formation promoting region 113 from the top of the bone contact portion. mm, 2.5 mm, or 3.0 mm.
- the upper end of the bone contact portion 111 may refer to an area adjacent to the end face of the fixture exposed to the outside after being inserted into the alveolar bone, and the length may be used interchangeably with the height in the longitudinal axis of the fixture.
- the antibacterial activity promoting region 114 is 1 to 50%, for example, 1 to 40%, 1 to 30%, 1 to 20%, 1 to 20%, based on the total length of the bone contact portion 111 to 10%, 1 to 5%, 10 to 50%, 10 to 40%, 10 to 30%, or 10 to 20%.
- the implant structure may be prepared using a biocompatible material.
- the biocompatible material is not limited to metal, ceramic, or resin as long as it is a biocompatible material.
- the biocompatible metal material may be made of copper, titanium, titanium alloy, cobalt chromium alloy, etc.
- the biocompatible ceramic material may be alumina (aluminum oxide), yttrium oxide, hafnium oxide, silicon oxide, magnesium oxide, oxide, etc. It may be provided with cerium or the like, and the biocompatible resin material may be provided with silicon, nylon, POM, composite material, or the like.
- titanium or titanium alloy may be included in a volume ratio of 50% or more and 100% or less of the implant.
- titanium may be included in an amount of 50% or more and 100% or less, 60% or more and 99% or less, 70% or more and 95% or less, 80% or more and 95% or less, or 90% or more and 95% or less in the volume ratio of the implant.
- the implant structure may be prepared by laser surface treatment, blasting surface treatment, or etching surface treatment.
- the implant structure is prepared by simultaneously performing a blasting process of increasing surface roughness by spraying fine sand particles on the first outer circumferential surface or the second outer circumferential surface and an etching process of increasing surface roughness by immersing in an etchant to corrode the surface It may be, or it may be provided by surface treatment with a laser.
- the laser may be a femtosecond laser.
- blasting surface treatment refers to increasing surface roughness by spraying fine particles on the surface of an implant structure.
- it may be performed by increasing the surface roughness by spraying fine sand particles on the first outer circumferential surface or the second outer circumferential surface.
- sand is used, but significantly improved macroscopic roughness can be obtained when hard materials such as boron carbide are used.
- Al 2 O 3 particles having an average diameter of 250 to 500 ⁇ m can be used.
- the etching surface treatment may be performed by immersing the bone contact portion 111 and the gingival contact portion 112 in an etchant to corrode the surface, and the surface roughness of the implant structure may be increased by the corrosion.
- the etching may be performed by reducing acid such as hydrofluoric acid (HF), or a mixture of hydrochloric acid (HCL) and sulfuric acid (H 2 SO 4 ).
- reducing acid such as hydrofluoric acid (HF), or a mixture of hydrochloric acid (HCL) and sulfuric acid (H 2 SO 4 ).
- the etching solution is not limited thereto, and may contain one or more compounds selected from the group consisting of phosphoric acid, nitric acid, ammonium fluoride, hydrogen peroxide, and hydrobromic acid.
- the etching time varies depending on the etching solution used, and may generally range from about 10 seconds to about 120 minutes. Etching may be performed by immersing at least a portion of the implant structure in the etching solution, waiting for about 1 to 60 minutes, more preferably about 20 to 40 minutes, and very preferably about 30 minutes, and then taking it out. However, it is not limited thereto, and it is also possible to immerse only the bone contact portion 111 or the gingival contact portion 112 in the etching solution.
- the implant structure 100 may be additionally washed with a predetermined cleaning solution.
- the surface of the first outer circumferential surface or the second outer circumferential surface may have a slightly higher roughness by a blasting process, and may have a slightly lower roughness than that of a blasting process by an etching process.
- the surface of the first outer circumferential surface or the second outer circumferential surface is treated only by etching.
- an implant structure including a fixture serving as an artificial tooth root, wherein the fixture has a cylindrical bone contact portion including a first outer circumferential surface in which threads are formed and a second outer circumferential surface disposed above the bone contact portion. It includes a gingival contact portion including, wherein the first outer circumferential surface or the second outer circumferential surface has a surface processed with a femtosecond laser, and (i) the height of the first outer circumferential surface or the second outer circumferential surface is higher than the non-laser processed surface 0.001 mm to 10 mm higher than the structure or (ii) having a structure in which the depth of the machined surface of the first outer circumferential surface or the second outer circumferential surface is 0.001 mm to 10 mm lower than that of the non-laser machined surface, An implant structure is provided.
- the height of the surface to be machined of the first outer circumferential surface or the second outer circumferential surface may be 0.001 mm to 10 mm, 0.01 mm to 10 mm, or 0.1 mm to 10 mm higher than the non-laser processed surface.
- the depth of the surface to be processed of the first outer circumferential surface or the second outer circumferential surface may be 0.001 mm to 10 mm, 0.01 mm to 10 mm, or 0.1 mm to 10 mm lower than the surface that is not laser processed. .
- first outer circumferential surface or the second outer circumferential surface When the height of the first outer circumferential surface or the second outer circumferential surface is higher or lower than the unprocessed surface in the above range, unique surface characteristics and functionality may be imparted to the first outer circumferential surface or the second outer circumferential surface of the implant structure, wherein, The functionality may be an antibacterial effect or an osseointegration promoting effect.
- the first outer circumferential surface has a structure that promotes osseointegration, and (i) has a structure in which the height of the surface to be processed of the first outer circumferential surface is 0.001 mm to 10 mm higher than that of the non-laser processed surface. or (ii) the depth of the processing surface of the first outer circumferential surface may be 0.001 mm to 10 mm lower than that of the non-laser processed surface.
- the height of the surface to be machined of the first outer circumferential surface may be 0.001 mm to 10 mm, 0.01 mm to 10 mm, or 0.1 mm to 10 mm higher than the non-laser processed surface.
- the depth of the surface to be processed of the first outer circumferential surface may be 0.001 mm to 10 mm, 0.01 mm to 10 mm, or 0.1 mm to 10 mm lower than that of the non-laser processed surface.
- Another aspect includes setting processing conditions of the laser beam; providing a laser beam according to set conditions; It provides a method for treating the surface of the implant structure including; processing the surface of the implant structure with the provided laser beam.
- the step of setting the processing conditions of the laser beam, the processing speed of the laser 0.1mm / s to 2500mm / s, the intensity of the laser 0.1W to 100W, the intensity (Fluence) of the laser 0.1 to 100 J It can be provided by setting /cm 2 .
- laser intensity refers to the energy per unit area, and refers to the final result value calculated by comprehensively considering average power, repetition rate, irradiation area, etc. during actual laser processing.
- the processing of the surface may include treating the surface of the implant structure by irradiating a laser beam to have a uniform surface treatment area within a focal depth region corresponding to a traveling direction of the laser beam.
- the step of treating the surface may be provided by treating the surface of the implant by setting the peak intensity at the focal point of the laser to 4 times the critical intensity of surface treatment of the implant.
- the peak intensity to have a uniform surface treatment area can be calculated through Equation 1 below.
- F peak, in-focus is the peak intensity (fluence) at the focus of the laser beam
- F LIAT is the surface treatment critical intensity of the 3D object.
- the fluence is a unit of laser intensity, J/cm 2 .
- the processing of the surface may be performed so that the surface of the implant structure is positioned within a depth of focus (DOF) corresponding to the traveling direction of the laser.
- DOF depth of focus
- a depth of focus area having a constant surface treatment area may be calculated through Equation 2 below.
- NA is the numerical aperture of the optical system
- ⁇ is the central wavelength of the laser beam
- M 2 is the quality of the laser beam.
- the laser beam it is possible to process the laser beam to have a uniform surface treatment area within the focal depth area corresponding to the traveling direction of the laser beam.
- the entire surface of the object can be uniformly treated by adjusting only the focal position of the laser beam without the need to adjust the focal length of the laser beam according to the shape of the object.
- the surface treatment area generated by a unit laser pulse is formed in a circular shape, but is not necessarily limited thereto. Accordingly, it will be apparent to those skilled in the art that the laser surface treatment area can be formed in different shapes according to the pattern of the laser beam.
- the depth of focus area (DOF) generated corresponding to the traveling direction of the laser beam is a portion to be subjected to surface treatment, that is, the surface of the object 270 (eg, the first outer circumferential surface or the second outer circumferential surface). It can be provided to be located in. This is because uniform surface treatment is possible without the need to adjust the focal length (i.e., the distance between the beam focusing part and the focal point) only when the part to be subjected to surface treatment is located within the DOF of the laser beam. .
- the laser surface treatment device 200 By implementing the laser surface treatment device 200 to be positioned within (DOF), it may be provided to process the surface of the object.
- the surface of the implant structure when the surface of the implant structure is treated by a femtosecond laser, it may be treated in a linear or grid pattern.
- a line formed by the nanoprotrusions on the surface of the implant structure for example, a row or a mountain range-shaped arrangement that can be seen in the 200 nm magnified view of FIG. 6(C)
- a valley forming the width of the nanoprotrusions Depending on the number of times, it can be clearly processed.
- the aspect ratio of the nano-protrusions on the surface of the implant structure may increase during the lattice-type treatment.
- the surface treatment is possible even if the surface treatment surface is separated from the laser focus area by a certain distance. For example, surface treatment is possible even if there is a distance of 8 to 12 mm (4 to 6 mm below or 4 to 6 mm above the unsurfaced portion). Since the surface treatment is possible as described above, it is possible to surface-treat the threads of the implant fixture having a height difference of less than 10 mm at once.
- the dental implant and its surface treatment have been described, but it is not limited thereto.
- Another aspect may provide an implant comprising nano-protrusions on the surface having a width of 10 to 1000 nm and an aspect ratio of 1000:1 to 1:50.
- Another aspect may provide an implant comprising nano-protrusions on the surface having a width of 50 to 200 nm and an aspect ratio of 1000:1 to 1:50.
- Such implants include implants for bone tissue replacement, bulk bulk fillers in granular form for inclusion in compositions for filling bone tissue defects, bone screws, implants for bone fusion, fixation pin implants or pins for implants, implants for skull reconstruction, orthopedics implants, percutaneous osseointegration implants, and dental implants.
- orthopedic implants include hip joint implants, knee joint implants, shoulder joint implants, elbow joint implants, wrist joint implants, ankle joint implants, pubic joint implants, metatarsal joint implants, Or generally, it may include joint implants, spinal implants, spinal implants and intervertebral disc implants, radial head implants, thumb implants, implants for osteotomy (high tibial osteotomy), and the like.
- joint implants spinal implants, spinal implants and intervertebral disc implants, radial head implants, thumb implants, implants for osteotomy (high tibial osteotomy), and the like.
- the orthopedic implant may be a joint implant, in particular a hip joint implant and a knee joint implant.
- Implants in the hip joint can be prostheses that are dysplastic heads and prostheses (endoosseous prosthesis or diaphysis of the femur) and cotyloid cavity prostheses.
- Knee joint implants may include tibial and femoral components of the knee joint.
- dental implants include dental implants themselves (helical, cylindrical, conical or layered), dental abutments, integrated abutments, dental crowns, dental implants in which abutments and crowns are integrated, dental beams, dental inserts, dental pins, and the like.
- the surface treatment method of the implant may be applied to artificial bone, bone preservation material, etc., and the artificial bone or bone preservation material is used to supplement a missing part of bone caused by a fracture or tumor resection or cartilage removed by lumbar surgery.
- the implant may be an artificial hip joint embedded in the femur.
- the surface treatment method of the implant can be applied to a member of an artificial joint, a bone bonding material used for fixing a fracture site, a fixing mechanism such as a spine (vertebral implant or lumbar implant), and the like.
- the implant surface treatment method of the present invention is not limited to implants embedded in a living body (in the body), but can also be applied to implants fixed to the body surface, and can be applied to pets or livestock, not limited to humans.
- implant and its surface treatment may be the same as or applied to the implant structure.
- Another aspect is an antibacterial composition
- a metal material including a plurality of protrusions having an aspect ratio of 1:1 to 1:50 on a surface, wherein the metal material is made of titanium or a titanium alloy, and is treated with a femtosecond laser.
- a surface-treated, antibacterial composition ; And it provides an antibacterial method comprising the step of contacting the antimicrobial composition containing the metal material.
- antimicrobial composition may be the same as or applied in accordance with the description of the implant structure.
- the first outer circumferential surface and the second outer circumferential surface on the surface of the structure have a specific pattern including nano-protrusions, and the characteristics of the outer circumferential surface improve adhesion between the implant structure and bone tissue, and antibacterial properties of the implant. can contribute to improving Therefore, the implant structure according to one aspect can provide excellent biocompatibility and stability by reducing side effects, such as inflammation, caused by a conventional implant having a biofilm applied to its surface.
- FIG. 1 is a perspective view of an implant structure including an abutment-integrated fixture according to an embodiment of the present invention.
- FIG. 2 is a view showing a state in which an implant structure including a fixture according to an embodiment of the present invention is inserted into an alveolar bone.
- FIG 3 is a perspective view of an implant structure including an abutment separation type fixture according to an embodiment of the present invention.
- FIG. 4 is a view showing a state in which a fixture according to an embodiment of the present invention is inserted into an alveolar bone.
- FIG. 5 is a diagram showing a system for manufacturing the implant structure of the present invention.
- FIG. 6 is a view confirming the surface of the titanium implant structure.
- 6(A) shows the surface of untreated titanium
- FIG. 6(B) shows the surface of a titanium metal implant treated with SLA (Sandblasted, Large Grit, Acid-etched)
- FIG. 6(C) shows the surface treated with a femtosecond laser.
- the surface of titanium and FIG. 6(D) is a diagram comparing the surface of untreated titanium and the surface of titanium subjected to femtosecond laser surface treatment.
- FIG. 7 is an enlarged view of the appearance of the surface of a titanium metal implant structure and a zirconia implant structure according to whether or not the surface is treated.
- Figure 7(A) shows the surface of zirconia without surface treatment
- Figure 7(B) shows the surface of zirconia treated with Laser 1
- Figure 7(C) shows the surface of titanium without surface treatment
- Figure 7(D) shows the surface of zirconia treated with Laser 1.
- FIG. 7(E) shows a titanium surface treated with Laser 2
- FIG. 7(F) shows a titanium surface treated with Laser 3.
- FIG. 8 is an enlarged view of the surface of a titanium metal implant structure processed by varying the number of processing linearly by a femtosecond laser.
- 8(A), (B), and (C) are the surface of a metal implant structure linearly machined once
- FIG. 8(D), (E), and (F) are a surface of a metal implant structure linearly machined 10 times.
- the surface, FIGS. 8(G) and (H) show the surface of the metal implant structure processed 100 times
- FIG. 8(I) shows the result of measuring the depth of the metal implant structure processed 100 times.
- FIG. 9 shows that the surface of the implant structure is treated by varying the femtosecond laser surface treatment conditions, and is a diagram showing that the surface treatment is possible even if the part to be surface treated is a certain distance away from the laser focus area during the femtosecond laser surface treatment. .
- FIG. 10 is a diagram illustrating surface treatment of a metal implant structure using a femtosecond laser.
- 10(A) shows the upper surface of the screw thread 310, the lower surface of the screw thread 320, and the side surface of the screw bone 330 among the surfaces of the first outer circumferential surface
- FIG. 10(B) shows the surface of the upper surface of the screw thread 310
- FIG. 10 (C) shows the surface treatment result of the lower surface 320
- FIG. 10 (D) shows the surface treatment result of the side surface 330 of the threaded bone.
- FIG. 11 shows the surface of the implant structure treated by controlling the type and number of processing using a femtosecond laser, and is a view of the surface of the implant structure photographed from above.
- Fig. 11(A) is 1 time linear surface treatment
- Fig. 11(B) is 10 times linear surface treatment
- Fig. 11(C) is 100 times linear surface treatment
- Fig. 11(D) is 1 time lattice surface treatment
- Fig. 11 (E) shows the result of 20 grating surface treatment
- FIG. 11 (F) shows the result of 100 grating surface treatment.
- FIG. 12 shows the surface of the implant structure treated by adjusting the type and number of processing using a femtosecond laser, and is a view taken after tilting the surface of the implant structure.
- Fig. 12(A) is 1 time linear surface treatment
- Fig. 12(B) is 10 times linear surface treatment
- Fig. 12(C) is 100 times linear surface treatment
- Fig. 12(D) is 1 time lattice surface treatment
- Fig. 12 (E) shows the result of 20 grating surface treatment
- FIG. 12 (F) shows the result of 100 grating surface treatment.
- FIG. 13 is a diagram confirming nanoprotrusions formed on the surface of an implant structure by setting different processing conditions with a femtosecond laser.
- FIG. 13(A) shows nanoprotrusions having an aspect ratio of 100:1
- FIG. 13(B) has an aspect ratio of 1:1
- FIG. 13(C) has an aspect ratio of 1:20.
- Figure 14 is a view showing the effect of killing bacteria according to the surface shape of the implant structure.
- Figure 14 (A) shows the results of confirming the bacterial killing effect in the control group
- Figure 14 (B) Example 1
- Figure 14 (C) Example 2
- Figure 14 (D) Example 3.
- Example 15 is a result of confirming the bacterial killing effect according to the surface shape of Example 2 according to the incubation time.
- 16 is a view showing a surface-treated implant structure implanted in an animal model and a CT scan result thereof.
- 16(A) is a surface-treated implant structure implanted in an animal model
- FIG. 16(B) shows an implant structure surface-treated by simple machining, an implant structure surface-treated by femtosecond laser, and an implant structure surface-treated by SLA. shows the CT scan results of
- FIG. 17 is a view confirming the osseointegration effect of the surface-treated implant structure implanted in an animal model.
- Figure 17 (A) shows the result of confirming the cortical BIC ratio
- Figure 17 (B) is the cortical bone area ratio.
- FIG. 18 is a view illustrating the expression of osteogenesis-related genes and cell differentiation according to surface treatment of an implant structure in a stem cell differentiation experiment.
- Figure 18 (A) is the expression of the Col1 gene
- Figure 18 (B) is the expression of the ALP gene
- Figure 18 (C) is the expression of the OCN gene
- Figure 18 (D) is a quantitative comparison of cell differentiation levels by ARS staining
- FIG. 18(E) shows the result of visually confirming the level of ARS staining.
- Figure 20 is a diagram quantitatively comparing the cell adhesion of surface-treated implant structures.
- Figure 20 (A) shows the cell adsorption capacity at 4 hours of culture
- Figure 20 (B) shows the result of comparing the cell adsorption capacity at 24 hours of culture.
- an 'implant fixture' is exemplified as an implant structure, but is not necessarily limited thereto, and includes all implants capable of surface treatment.
- 'beam angle adjuster' is used as a general term for the two-dimensional scan mirror unit and the single-axis scan mirror unit
- 'rotation unit' is used as a general term for the stepping rotation unit and the continuous rotation unit.
- the present invention is an implant structure including a fixture that serves as an artificial tooth root, wherein the fixture includes a bone contact portion 111 including a first outer circumferential surface in which threads are formed and a second outer circumferential surface disposed above the bone contact portion.
- the present invention is an implant structure including a fixture that serves as an artificial tooth root, wherein the fixture includes a bone contact portion 111 including a threaded outer circumferential surface, and the outer circumferential surface has a width of 10 to 1000 nm and a thickness of 1000 nm.
- An implant structure including an antibacterial activity promoting region 114 including a plurality of nano-protrusions having an aspect ratio of 50 is provided.
- FIGS. 1 to 4 are diagrams illustrating an exemplary structure and shape of an implant structure according to one embodiment, and a state in which the implant structure is inserted into an alveolar bone.
- the fixture 110 of the implant structure 100 according to the present invention is implanted in the missing alveolar bone to form a tooth root, specifically including a bone contact portion 111, a gingival contact portion 112, and an upper portion 130. It can be done.
- the fixture 110 of the implant structure 100 according to the present invention is implanted in the missing alveolar bone to form a tooth root, specifically, a bone contact portion composed of a bone formation promoting area 113 and an antibacterial activity promoting area 114 ( 111) may be included.
- the fixture 110 of the implant structure 100 is made of a material such as titanium alloy, which is a material harmless to the human body, and a predetermined surface treatment may be performed on the surface of the fixture 110.
- the implant fixture 110 is commonly referred to as an abutment (not shown), and types may be classified depending on whether an abutment to which an artificial tooth is coupled is integrally formed.
- the abutment 140 may be manufactured integrally with the fixture and provided as a fixture for an integral implant. In addition, the abutment 140 may be manufactured in a state separated from the fixture and provided in a form coupled to the implant structure when inserted.
- the fixture 110 of the implant structure 100 described in one embodiment may be a fixture for an abutment-integrated implant of FIG. 1 or a fixture for an abutment-separate implant of FIG. 3 .
- the bone contact portion 111 is a portion inserted into the alveolar bone 151 in the fixture 110 of the implant structure 100, and a screw thread wound in a spiral shape is formed on the outer circumferential surface of the body configured in a cylindrical shape as a whole It includes the first outer circumferential surface.
- the cylindrical shape may be a cylindrical shape or a truncated cone shape, and the truncated cone shape may be a cylindrical shape having an upper beam lower beam or an upper narrow lower beam shape.
- the screw thread may be a single-line screw or a double-line screw, as well as a multi-line screw. At this time, it is preferable that the pitch of each screw is the same.
- the screw thread may gradually increase in diameter from the lower end and then maintain a constant diameter after a certain section.
- a cutting blade (not shown) for self-tapping may be formed at the lower end, and the cutting blade may allow the fixture 110 to be easily inserted while cutting the surrounding bone of the alveolar bone in the initial insertion process. .
- the screw thread may be provided with a screw thread upper surface 310, a screw thread lower surface 320 and a screw bone side surface 330.
- the first outer circumferential surface of the bone contact portion 111 has nano-protrusions having a specific aspect ratio formed thereon.
- a specific pattern of nano-protrusions may be provided by laser surface treatment, and fine sand particles may be formed. It may be treated by simultaneously performing a blasting process in which surface roughness is increased by spraying and an etching process in which surface roughness is increased by immersing in an etchant to corrode the surface.
- the bone contact portion 111 may be exposed to bacteria or the like, but is highly likely to be a part that is mainly inserted into the alveolar bone 151 and requires bone fusion, and is preferably surface-treated to promote bone fusion.
- the bone contact portion 111 may include a bone formation promoting area 113 corresponding to the first outer circumferential surface and an antibacterial activity promoting area 114 corresponding to the second outer circumferential surface. In this case, bone fusion is promoted and the bone contact portion It is possible to reduce the risk of exposure to bacteria and the like that may be caused in the upper part.
- the bone contact portion 111 may have a different surface pattern of the upper surface of the screw thread 310, the lower surface of the screw thread 320, or the side surface of the screw bone 330 included in the first outer circumferential surface by laser surface treatment.
- the bone contact portion 111 may be processed to form, for example, an osseointegration promoting structure 410 on the screw thread lower surface 320 and a flat structure 420 on the screw thread upper surface 310, respectively, and the bone fusion promoting structure ( 410) and the flat structure 420 may be processed so that they are all included in the side of the screw bone 330, that is, in parallel.
- the gingival contact portion 112 is disposed above the bone contact portion 111 and includes a second outer circumferential surface on which no thread is formed, and is a portion to which the gingiva 150 can be contacted.
- the gingival contact portion 112 may be provided in a cylindrical, conical or layered shape, specifically, may be a cylindrical shape (eg, a cylindrical shape, a truncated cone shape), and the truncated cone shape may be a cylinder in the form of an upper beam or a lower beam. can be a shape.
- the second outer circumferential surface of the gingival contact portion 112 has nano-protrusions having a specific aspect ratio formed on the surface.
- a specific pattern of nano-protrusions may be provided by laser surface treatment, and fine sand particles may be formed. It may be treated by simultaneously performing a blasting process in which surface roughness is increased by spraying and an etching process in which surface roughness is increased by immersing in an etchant to corrode the surface.
- the gingival contact portion 112 is a part that requires bone fusion when inserted into the alveolar bone 151, it is likely to mainly contact the gingiva 150 and is likely to be exposed to bacteria, etc. It is preferable that the surface is treated so as to promote death.
- the upper part 130 is disposed above the gingival contact part 112 and may be a part to which an abutment or a crown can be coupled depending on the type of implant. Specifically, in the case of an integral implant fixture, a crown may be coupled to the upper portion, and in the case of an implant structure manufactured in a state in which the fixture and abutment are separated, an abutmentor may be coupled to the upper portion.
- the upper part 130 may have an approximate shape of a truncated cone.
- the surface of the upper portion 130 may be provided in a state in which the surface is placed smoothly by simply cutting without surface treatment.
- FIG. 5 is a diagram showing a system for manufacturing the implant structure of the present invention.
- the laser surface treatment apparatus 200 includes a laser generator 210, a beam expander 220, a beam angle adjuster 230, and a beam focusing unit 240. , It may include a rotation unit 250 and a control unit 260.
- the components shown in FIG. 3 are not essential to implement the implant structure manufacturing system, so the implant structure manufacturing system described herein may have more or fewer components than the components listed above.
- the laser generator 210 may generate a laser beam for surface treatment of the object 270 .
- the laser generator 210 may use a pulsed laser source.
- the laser beam generated by the laser generator 210 in units of pulses may be irradiated to the target object 270 via the beam expander 220, the beam angle adjuster 230, and the beam concentrator 240 sequentially. there is.
- the laser generator 210 may generate any one of nanosecond, picosecond, and femtosecond laser beams, and more preferably, femtosecond laser beams.
- the femtosecond laser beam is an ultrashort laser beam having a pulse duration time of 1 to 1000 femtoseconds.
- the laser generator 210 may generate a pulsed laser beam having a pulse duration within a femtosecond range.
- the pulse repetition rate may be within a range of several to hundreds of kHz or within a MHz range.
- the wavelength of the laser beam all laser wavelengths located within the range from the infrared region to the ultraviolet region may be used.
- the wavelength of the laser beam may include an infrared wavelength, a visible ray wavelength, and an ultraviolet wavelength.
- the beam expander 220 may adjust the size of the laser beam generated by the laser generator 210 in units of pulses. More specifically, the beam expander 220 may expand the size of the laser beam. In addition, the beam expander 220 may generate a laser beam as a collimated beam with less dispersion or concentration. Thus, the size of the laser beam generated by the laser generator 210 may be enlarged through the beam expander 220 and converted into a collimated beam.
- the beam expanding unit 220 may change the diameter of the laser beam generated by the laser generating unit 210 and output the changed laser beam in the direction of the beam angle adjusting unit 230 . At this time, the beam expander 220 may manually or automatically adjust the size of the laser beam.
- the beam angle adjusting unit 230 may adjust the focal position of the laser beam output from the beam expanding unit 220 .
- the beam angle control unit may be a two-dimensional scan mirror unit or a single-axis scan mirror unit.
- the 2D scan mirror unit (or XY scan mirror unit) is a beam angle adjusting unit composed of two axes, that is, the 2D scan mirror unit irradiates the laser beam to the target object 270 according to the control signal of the controller 260. It is possible to adjust the focal position of , that is, the focal position in the X-axis and Y-axis.
- the short-axis scan mirror unit is a beam angle adjusting unit composed of one axis, and can adjust the focal position of the laser beam output from the beam expansion unit 220 .
- the short-axis scan mirror unit may adjust the focal position of the laser beam irradiated to the target object 270, that is, the focal position in the X axis or the Y axis, according to a control signal from the controller 260.
- the beam angle adjusting unit 230 includes an X-axis scan mirror and a Y-axis scan mirror, and may perform a one-dimensional or two-dimensional scanning operation.
- the X-axis scan mirror and the Y-axis scan mirror are composed of a pair of scan mirrors having a galvanometer method, and the pair of scan mirrors are each in one direction of axes crossing the X-Y plane.
- the laser beam can be deflected.
- the beam angle adjuster 230 may reflect the laser beam in a direction for laser surface treatment through the X-axis scan mirror and the Y-axis scan mirror to irradiate the laser beam to a desired location of the object 270 .
- the beam angle adjusting unit 230 may finely control the laser beam in the X-axis or Y-axis direction along the upper surface of the object 270 through the X-axis scan mirror and the Y-axis scan mirror.
- the beam angle adjusting unit 230 moves the first outer circumferential surface or the second outer circumferential surface of the implant structure 100 corresponding to the object in a horizontal direction (ie, implant) according to a control signal from the control unit 260.
- the laser beam may be irradiated according to a predetermined scanning path in the length direction of the structure).
- nano-protrusion shapes may be formed on the surface of the first outer circumferential surface or the second outer circumferential surface of the implant structure 100 .
- the predetermined scanning path may be determined based on 2D focus position data provided from the control unit 260 to the beam angle adjusting unit 230 .
- the laser beam-treated surface of the first outer circumferential surface or the second outer circumferential surface of the implant structure 100 may form a structure with a higher height or a lower depth compared to the untreated portion.
- the predetermined scanning path may be determined based on 2D focus position data provided from the control unit 260 to the beam angle adjusting unit 230 .
- the beam focusing unit 240 may be disposed below the beam angle adjusting unit 230 and focus the laser beam passing through the beam angle adjusting unit 230 to the target object 270 .
- the beam focusing unit 240 may change the laser beam incident at a predetermined angle from the beam angle adjusting unit 230 in a direction perpendicular to the longitudinal direction of the object 270 .
- the beam concentrator 240 may include a telecentric F-theta lens or an F-theta lens. Thus, the beam concentrating unit 240 may perform micro- or nano-scale laser surface treatment on the surface of the object 270 (eg, the first outer circumferential surface or the second outer circumferential surface).
- the rotation unit 250 may fix the corresponding object 270 so that the object 270 is located in the direction of travel of the laser beam, that is, under the beam focusing unit 240 .
- the rotation unit 250 may rotate the object 270 by a predetermined angle (eg, 120 degrees) for each surface treatment step according to a control signal from the control unit 260 .
- the controller 260 may control overall operations of the laser surface treatment apparatus 200 .
- the controller 260 may control at least some of the above-described components 210 to 250 in order to drive an application program stored in a memory.
- the controller 260 may combine and operate at least two or more of the components included in the laser surface treatment apparatus 200 to drive the application program.
- controller 260 may control the laser generator 210 to adjust the wavelength, pulse duration, and pulse repetition rate of the laser beam generated by the laser generator 210 in units of pulses.
- the controller 260 generates a control signal including two-dimensional focus position data (ie, X-axis and Y-axis focus position data) of a laser beam for processing the surface of the object 270, and transmits the control signal to the beam. It may be provided as an angle adjusting unit (230).
- the 2D scan mirror unit 230 may emit a laser beam based on 2D focus position data included in the control signal received from the controller 260 .
- the controller 260 monitors the laser surface treatment process for one area of the object 270 in real time, and upon completion of the surface treatment for the one area, controls the rotation unit 250 to move the object 270 step by step. After rotating by a predetermined angle, it is possible to control the laser surface treatment for other areas of the target object 270 .
- the controller 260 may perform laser surface treatment on the first outer circumferential surface of the fixture 110 of the implant structure 100 by controlling the laser generator 210 and the beam angle adjuster 230 .
- the controller 260 controls the rotation unit 250 to rotate the fixture 110 of the implant structure clockwise or counterclockwise by a predetermined angle (eg, 120 degrees), and then , It is possible to perform laser surface treatment on the second outer circumferential surface of the fixture 110 of the implant structure 100 by controlling the laser generating unit 210 and the beam angle adjusting unit 230 .
- the controller 260 controls the rotation unit 250 to rotate the fixture 110 of the implant structure 100 by a predetermined angle (eg, 120 degrees) in the same direction, and then , Laser surface treatment may be performed on the surface of the adjuvant of the implant structure 100 by controlling the laser generating unit 210 and the beam angle adjusting unit 230 .
- a predetermined angle eg, 120 degrees
- Laser surface treatment may be performed on the surface of the adjuvant of the implant structure 100 by controlling the laser generating unit 210 and the beam angle adjusting unit 230 .
- the surface of the implant structure 100 can be surface treated at a very high speed.
- the object may be configured to undergo a surface treatment process of fewer or more steps than the above-described surface treatment process.
- it may be configured to rotate by different angles for each step instead of the same angle for each step.
- the controller 260 may control operations of the laser generator 210, the beam angle adjuster 230, and the rotation unit 250 to be synchronized with each other. That is, the control unit 260 may control the beam angle adjusting unit 230 based on the generation cycle of the laser beam irradiated from the laser generator 210 . In addition, the control unit 260 may control the rotating unit 250 through the laser generator 210 and the beam angle adjusting unit 230 to synchronize with the surface treatment time of the object 270 .
- the laser surface treatment device 200 includes an intake part 280 that sucks fine particles generated during surface treatment of the implant structure.
- the intake part 280 can prevent fine particles generated during processing from being attached to the base material and accumulated.
- the laser surface treatment apparatus can perform laser surface treatment of an object at a very high speed by using a beam angle adjusting unit and a rotation unit. By processing the surface at such a high speed, the entire process time for laser surface treatment can be shortened.
- the laser surface treatment device may include a laser generating unit, a beam expanding unit, a beam angle adjusting unit, a beam concentrating unit, an object moving unit, and a control unit.
- the implant structure may be processed while being fixed to the object moving unit.
- the object moving unit may be synchronized with the surface treatment time of the laser beam by the control unit, and may move the object horizontally or vertically.
- the surface of the object may be surface treated with a laser beam.
- FIG. 6 is a titanium implant structure, which is not surface-treated (FIG. 6(A)), SLA (Sandblasted, Large Grit, Acid-etched) surface-treated implant structure (FIG. 6(B)) and a femtosecond laser beam. It is a comparison of the surface-treated implant structures (FIG. 6(C)).
- the surface of the implant structure was treated with a femtosecond laser beam and the surface was checked.
- the energy of the femtosecond laser was 1.2 J/cm 2
- the pulse width was 230 fs
- the pulse repetition rate was 100 kHz.
- the surface of the implant structure was treated by adjusting the size, processing speed, and processing direction of the area to be processed by setting different processing conditions of the femtosecond laser.
- the processing speed was set to 0.1 to 1000 mm/s, and processing was performed in a point type, linear or grid type.
- FIG. 7 is an enlarged view of the appearance of the surface of a titanium metal implant structure and a zirconia implant structure according to whether or not the surface is treated.
- FIG. 7(B) in the case of the zirconia implant structure, a constant pattern was not shown during surface treatment.
- FIGS. 7 (D) to (F) it was confirmed that the titanium metal implant showed a constant pattern during surface treatment.
- femtosecond laser processing conditions are shown in Table 1 below.
- FIG. 8 is an enlarged view of the surface of a titanium metal implant structure processed by varying the number of linear processes by a femtosecond laser.
- a pattern was formed in a constant shape on the surface of the implant structure as the number of processing increased.
- surface treatment was performed linearly 100 times, it was confirmed that a depth of about 170 ⁇ m was exhibited. Accordingly, it was confirmed that a depth of about 170 nm is etched when linearly processed once by a femtosecond laser.
- FIG. 9 is a diagram illustrating the treatment of the surface of an implant structure at various heights and depths by setting surface treatment conditions of a femtosecond laser.
- the surface was 0 to 10 mm higher in height or 0 to 10 mm lower in depth than the unprocessed surface, depending on the set processing conditions.
- the surface treatment was possible even if the part to be surface treated was a certain distance away from the laser focus area.
- the surface treatment was possible even when the part to be surface-treated was 8 to 12 mm away from the laser focus area (4 to 6 mm below or 4 to 6 mm above the unsurfaced part). Since the surface treatment is possible as described above, it was found that the screw thread of the implant fixture having a height difference of less than 10 mm can be surface treated once or several times.
- FIG. 10 is a diagram illustrating surface treatment of a metal implant structure using a femtosecond laser.
- 10(A) shows the upper surface of the screw thread 310, the lower surface of the screw thread 320, and the side surface of the screw bone 330 among the surfaces of the first outer circumferential surface.
- FIG. 10 (B) enlarges the surface of the upper surface 310 of the screw thread
- FIG. 10 (C) shows the surface of the lower surface 320
- FIG. 8 it was confirmed that the femtosecond laser treatment can implement a surface that exhibits an osseointegration promoting effect even on the surface of a metal implant structure having a screw thread and screw bone structure.
- FIGS. 11 and 12 are diagrams showing the surface of the implant structure treated with a femtosecond laser and the number and type of processing controlled. Specifically, the surface of the implant structure was treated in a linear and grid pattern by a femtosecond laser.
- 11(A) and 12(A) are linear surface treatment once
- FIGS. 11(B) and 12(B) are linear surface treatment 10 times
- FIGS. 11(C) and 12(C) are linear surface treatment 100 times.
- FIGS. 11(D) and 12(D) are 1 grating surface treatment
- FIGS. 11(E) and 12(E) are 20 grating surface treatment
- FIG. 11(F) and FIG. 12(F) Shows the result of 100 grid surface treatment. As shown in FIGS.
- the surface can be processed in different shapes depending on the type and number of surface processing.
- the line formed by the nanoprotrusions on the surface of the implant structure for example, a row or a mountain range arrangement
- the valleys forming the width of the nanoprotrusions were clearly processed according to the number of times, and in the case of the lattice type treatment, the implant It was confirmed that the aspect ratio of the nanoprotrusions on the surface of the structure increased.
- FIG. 13 is a diagram confirming nanoprotrusions formed on the surface of an implant structure by setting different processing conditions with a femtosecond laser. At this time, femtosecond laser processing conditions are shown in Table 2 below.
- Example 1 Example 2
- Example 3 Laser power (W) 1.5 1.5 1.5 Machining speed (mm/s) 500 500 500 processing form Line Grid Grid Number of processing (times)
- the laser surface-treated implants could form nanoprotrusions having an aspect ratio of 1000:1 to 1:50.
- Example 1 when the surface treatment conditions were set to linear and 1 cycle (Example 1), it was confirmed that nanoprotrusions with curved ends were formed, and when the surface treatment conditions were set to lattice and 10 cycles (Example 2) , It was confirmed that nano-protrusions with flat ends were formed, and when the surface treatment conditions were set to lattice type and 100 times (Example 3), it was confirmed that nano-protrusions with pointed ends were formed.
- FIG. 14 is a view illustrating the effect of killing bacteria according to the surface shape of the implant structure
- FIG. 15 is a result of confirming the effect of killing bacteria according to the surface shape of Example 2 according to the incubation time.
- the implant structure including nano-protrusions at a specific aspect ratio exhibits an antibacterial effect on the surface.
- aspects Ratio aspect ratio
- the implant including nano-protrusions having a specific aspect ratio on the surface
- it means that it directly kills germs such as bacteria to show an antibacterial effect.
- FIG. 16(A) is a diagram showing a surface-treated implant structure implanted in an animal model
- FIG. 16(B) shows an implant structure surface-treated by simple machining, an implant structure surface-treated by femtosecond laser, and an SLA surface.
- a CT scan result of the treated implant structure is shown.
- FIG. 17 is a view confirming the osseointegration effect of the surface-treated implant structure implanted in an animal model.
- Figure 17 (A) shows the cortical BIC ratio
- Figure 17 (B) shows the cortical bone area ratio.
- the cortical BIC ratio and cortical bone area ratio were the highest in the implant structure (M+L) surface treated with femtosecond laser. This means that the femtosecond laser-treated implant structure exhibits an equal or higher level of osseointegration effect than the SLA surface-treated implant structure.
- FIG. 18 is a view illustrating the expression of osteogenesis-related genes and cell differentiation according to surface treatment of an implant structure in a stem cell differentiation experiment.
- Figure 18 (A) is the expression of the Col1 gene
- Figure 18 (B) is the expression of the ALP gene
- Figure 18 (C) is the expression of the OCN gene
- Figure 18 (D) is a quantitative comparison of cell differentiation levels by ARS staining
- FIG. 18(E) shows the result of visually confirming the ARS staining level.
- the expression of Col1, ALP, and OCN genes which are bone formation-related genes, increased by about 20 to 50% on the 14th day of stem cell differentiation in the implant structure treated with femtosecond laser, which is higher than that of other surface-treated structures.
- FIGS. 18 (A) to (C) It was confirmed (see FIGS. 18 (A) to (C)).
- the implant structure treated with femtosecond laser (Ti+FsL) was higher than other surface-treated structures (FIG. 18(D) and see (E)).
- 19 and 20 are diagrams confirming the cell adhesion of the surface-treated implant structure.
- M denotes simple machining
- P denotes precision polishing after simple machining
- L denotes femtosecond laser surface treatment.
Abstract
Description
Laser 1 | Laser 2 | Laser 3 | |
Laser power (W) | 1.5 | 1.5 | 1.5 |
가공 속도 (mm/s) | 500 | 500 | 500 |
가공 형태 | 선형(Line) | 선형(Line) | 선형(Line) |
가공 횟수 (회) | 1 | 10 | 100 |
실시예 1 | 실시예 2 | 실시예 3 | |
Laser power (W) | 1.5 | 1.5 | 1.5 |
가공 속도 (mm/s) | 500 | 500 | 500 |
가공 형태 | 선형(Line) | 격자형(Grid) | 격자형(Grid) |
가공 횟수 (회) | 1 | 10 | 100 |
Claims (18)
- 인공 치근의 역할을 수행하는 픽스처를 포함하는 임플란트 구조체로서,상기 픽스처는 나사산이 형성되어 있는 제1외주면을 포함하는 원통 형상의 골 접촉부(111)와 상기 골 접촉부의 상부에 배치되어 있는 제2외주면을 포함하는 치은 접촉부(112)를 포함하며,상기 제1외주면 또는 제2외주면은 10 내지 1000 nm의 폭 및 1000:1 내지 1:50의 종횡비를 갖는 복수 개의 나노 돌기를 포함하는 것인, 임플란트 구조체.
- 청구항 1에 있어서, 상기 제1외주면 및 상기 제2외주면에 포함된 상기 나노 돌기는 서로 다른 종횡비를 갖는 것인, 임플란트 구조체.
- 청구항 1에 있어서, 상기 제2외주면의 나노 돌기 형상은 임플란트 표면에 존재하는 박테리아의 사멸을 촉진시키는 것으로, 10 내지 1000 nm의 폭 및 1:1 내지 1:50의 종횡비를 갖는 것인, 임플란트 구조체.
- 청구항 3에 있어서, 상기 나노 돌기는 말단이 평편한(blunt) 것인, 임플란트 구조체.
- 청구항 3에 있어서, 상기 제2외주면의 표면에 대한 산술 평균 거칠기(Ra) 값은 1.0 내지 5.0㎛ 범위 중 어느 하나인 것인, 임플란트 구조체.
- 청구항 1에 있어서, 상기 제1외주면의 나노 돌기 형상은 임플란트와의 골융합을 촉진시키기 위한 것으로, 10 내지 1000 nm의 폭 및 1000:1 내지 1:1의 종횡비를 갖는 것인, 임플란트 구조체.
- 청구항 6에 있어서, 상기 제1외주면의 표면에 대한 산술 평균 거칠기(Ra) 값은 0.5 내지 3.0㎛ 범위 중 어느 하나인 것인, 임플란트 구조체.
- 청구항 1에 있어서, 상기 임플란트 구조체는 티타늄, 또는 티타늄 합금으로 이루어진 군에서 선택된 하나 이상의 재질인, 임플란트 구조체.
- 청구항 1에 있어서, 상기 임플란트 구조체는 펨토초 레이저로 표면 처리된 것인, 임플란트 구조체.
- 청구항 9에 있어서, 상기 표면 처리는 1 내지 5 W의 레이저 강도를 갖는 펨토초 레이저 빔을 제1외주면 또는 제2외주면의 표면에 선형(Line) 및 격자형(Grid)으로 1회 이상 조사하는 것인, 임플란트 구조체.
- 청구항 10에 있어서, 상기 제1외주면 또는 제2외주면은 펨토초 레이저로 표면이 가공된 것으로서,(i) 제1 외주면 또는 제2 외주면의 피가공면의 높이가 레이저 가공되지 않은 표면에 비해 0.001 mm 내지 10 mm 더 높은 구조를 갖는 것; 또는(ii) 제1 외주면 또는 제2 외주면의 피가공면의 깊이가 레이저 가공되지 않은 표면에 비해 0.001 mm 내지 10 mm 더 낮은 구조를 갖는 것;인, 임플란트 구조체.
- 1:1 내지 1:50의 종횡비를 갖는 복수 개의 나도 돌기를 표면 상에 포함하는 금속 소재를 포함하는 항균용 조성물로서,상기 금속 소재는 티타늄, 또는 티타늄 합금으로 이루어지며, 펨토초 레이저로 표면 처리한 것인, 항균용 조성물.
- 청구항 12에 있어서, 상기 나노 돌기는 말단이 평편한(blunt) 것인, 항균용 조성물.
- 인공 치근의 역할을 수행하는 픽스처를 포함하는 임플란트 구조체로서,상기 픽스처는 나사산이 형성되어 있는 외주면을 포함하는 원통 형상의 골 접촉부(111)를 포함하며,상기 외주면은 10 내지 1000 nm의 폭 및 1000:1 내지 1:1의 종횡비를 갖는 복수 개의 나노 돌기를 포함하는 골 형성 촉진 영역(113), 및상기 골 형성 촉진 영역의 상부에 위치하며, 10 내지 1000 nm의 폭 및 1:1 내지 1:50의 종횡비를 갖는 복수개의 나노 돌기를 포함하는 항균 활성 촉진 영역(114)을 포함하는, 임플란트 구조체.
- 청구항 14에 있어서, 상기 항균 활성 촉진 영역은 골 접촉부의 상단으로부터 골 형성 촉진 영역의 방향으로 0.1 내지 3.0mm 범위에서 형성되는 것인, 임플란트 구조체.
- 청구항 14에 있어서, 상기 항균 활성 촉진 영역의 나노 돌기는 말단이 평편한 것인, 임플란트 구조체.
- 청구항 14에 있어서, 상기 임플란트 구조체는 티타늄, 또는 티타늄 합금으로 이루어진 군에서 선택된 하나 이상의 재질인, 임플란트 구조체.
- 청구항 14에 있어서, 상기 임플란트 구조체는 펨토초 레이저로 표면 처리된 것인, 임플란트 구조체.
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KR20120004204A (ko) * | 2010-07-06 | 2012-01-12 | (주)덴토스 | 표면처리된 치열교정용 마이크로 임플란트 및 그 제조방법 |
KR20190052689A (ko) * | 2016-11-10 | 2019-05-16 | 가부시키가이샤 난토 | 생체 조직 활착면, 임플란트, 생체 조직 활착면의 형성 방법, 임플란트의 제조 방법 |
KR102173456B1 (ko) | 2020-02-21 | 2020-11-03 | 주식회사 제일메디칼코퍼레이션 | 항균성을 갖는 티타늄 임플란트 및 이의 제조방법 |
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JP2009045246A (ja) * | 2007-08-21 | 2009-03-05 | Puente:Kk | 骨芽細胞系細胞の増殖と分化を促進する医療用ナノ表面加工チタンおよびその製造方法 |
KR20110091257A (ko) * | 2010-02-05 | 2011-08-11 | (주) 케이제이 메디텍 | 표면마찰 계수가 증가된 치과용 임플란트 레이저표면처리방법 및 상기 방법으로 처리된 치과용 임플란트 |
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KR20190052689A (ko) * | 2016-11-10 | 2019-05-16 | 가부시키가이샤 난토 | 생체 조직 활착면, 임플란트, 생체 조직 활착면의 형성 방법, 임플란트의 제조 방법 |
KR102173456B1 (ko) | 2020-02-21 | 2020-11-03 | 주식회사 제일메디칼코퍼레이션 | 항균성을 갖는 티타늄 임플란트 및 이의 제조방법 |
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