KR20230102485A - Dental implant assembly - Google Patents

Abstract

One embodiment of the present invention is an implant inserted into the alveolar bone to form an artificial tooth root according to a rotational motion about an axis, and an implant coupled to the implant to support a prosthesis and extending from the top to the bottom inside and inserting a fastening screw into which a fastening screw is inserted A dental implant assembly comprising an abutment in which a ball is formed, wherein the implant includes an inner groove formed on an upper surface to which an abutment for supporting a prosthesis can be coupled, and an outer screw thread formed from the upper end to the lower end. The abutment includes an upper portion protruding out of the implant and to which the prosthesis is attached, and a lower portion disposed below the upper portion and inserted into the inner groove, the outer surface comprising: It is divided into an upper region and a lower region according to a predetermined height, and the surface is treated by laser processing to form one or more first grooves, wherein at least one of the average width and average depth of the first grooves in the lower region is the upper region. It provides a dental implant assembly formed larger than the first groove of the.

Description

Dental implant assembly {DENTAL IMPLANT ASSEMBLY}

The present invention relates to dental implant assemblies.

Dental implants (hereinafter simply referred to as 'implants') inserted into the alveolar bone have been used for a long time, and the currently commonly used implants are selected from titanium, titanium alloy material, or ceramic material having excellent biocompatibility.

Implants should not only be functionally capable of acting as real teeth, but also be manufactured to properly distribute the load applied to the teeth so that they can be used for a long time as real teeth.

Implants placed in the alveolar bone are roughly divided into an external connection method and an internal connection method according to the shape of the combination with the abutment. The gap between the abutment and the abutment is wide, and there is a high probability that bacteria will inhabit, leading to bone resorption at the boundary.

Therefore, the internal connection method is mainly used recently. In the internal connection method, a regular hexagonal groove (generally called a hexa part) is formed inside the implant, and the part where the abutment meets the implant is formed in a cone shape. It has the advantage of high implantation success rate by minimizing the initial bone resorption by excluding the space for bacteria to inhabit. However, there is a disadvantage in that the possibility of fracture of the implant inserted into the bone is relatively high due to structural limitations caused by the abutment entering the implant.

Fracture is derived from a fatigue phenomenon. Fatigue refers to a phenomenon in which the strength of a material or structure is lowered and ultimately failure occurs as the number of repetitions of stress increases when repeated stress occurs in materials and structures. During mastication movement, not only the vertical masticatory force in the axial direction of the implant acts on the abutment, but also the horizontal masticatory force perpendicular to the axial direction in combination, and the lower part of the abutment touches the hexa part to apply repeated force. , there is a problem in that, due to this, tensile stress is periodically applied to the edge of the hexagonal part, which is a geometrically discontinuous point, and fatigue fracture may be caused in the form of a longitudinal fracture or a transverse fracture.

On the other hand, in the implant procedure, the bone fusion (Osteo-integration) characteristics of the implant is very important. Excellent osseointegration properties mean that a permanent bond is created between the implant and the bone within a short treatment period after achieving initial stability by fixing the implant to the bone.

In this way, in order to improve osseointegration characteristics, the implant surface may be properly treated and imparted. The surface treatment method is chemically roughened by, for example, sandblasting, anodic oxidation or etching. Alternatively, the surface may be treated by an additive method such as coating or immersing a material having excellent biocompatibility. Implants surface-treated by the aforementioned surface treatment method can shorten the healing period after surgery.

In particular, as an example of a conventional surface treatment method, a method of improving osseointegration characteristics by imparting surface roughness to the surface of an implant by sandblasting and etching treatment has been proposed. There is a problem in that osseointegration characteristics are not sufficiently implemented due to surface roughness.

Korea Utility Model Registration No. 20-0386621 (2005.06.02)

The present invention is to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a dental implant assembly having high durability against fatigue fracture and having different surface roughness for each surface position and having excellent osseointegration characteristics. .

In order to achieve the above object, one aspect of the present invention is an implant inserted into the alveolar bone to form an artificial tooth root according to a rotational motion about an axis and coupled to the implant to support a prosthesis and extend from the top to the bottom inside, A dental implant assembly including an abutment in which a fastening screw insertion hole into which a fastening screw is inserted is formed, wherein the implant includes an inner groove formed on an upper surface to which an abutment for supporting a prosthesis can be coupled, and an upper upper end and an outer surface on which a thread is formed from the bottom to the bottom, wherein the abutment includes an upper portion protruding out of the implant and attaching the prosthesis, and a lower portion disposed below the upper portion and inserted into the inner groove. The outer surface is divided into an upper region and a lower region according to a predetermined height, and the surface is treated by laser processing to form one or more first grooves, the average width and average width of the first grooves in the lower region At least one of the depths is formed larger than the first groove of the upper region, providing a dental implant assembly.

In one embodiment of the present invention, the inner groove has a circular cross section downward from the upper surface inlet at a certain depth, and an upper inclined portion having a narrow inner diameter toward the bottom, and a cross-sectional shape downward at a certain depth of the upper inclined portion. The polygon part, which is a polygon, has a diameter greater than or equal to the diameter of a circle circumscribed to the polygon of the polygon part below a certain depth of the polygon part, and a circular boring section formed ahead of the polygon part, below a certain depth of the boring section A second circular vertical portion having a smaller diameter than the boring section, and an internal thread formed with an abutment coupling thread having a smaller diameter than a circle inscribed in the polygon of the polygonal portion below a predetermined depth of the second circular vertical portion. Including, it may be a dental implant assembly.

In one embodiment of the present invention, the abutment is disposed at the lower end of the lower part and is elastically deformed when the abutment is inserted into the implant and is forcibly fitted to the inner circumferential surface of the second circular vertical part to form the abutment. It may be a dental implant assembly further comprising a holding part for temporarily fixing the ment to the inside of the fixture.

In one embodiment of the present invention, the outer surface may be a dental implant assembly, characterized in that one or more second grooves are formed by surface treatment by etching after laser processing.

In one embodiment of the present invention, the second groove may be a dental implant assembly, characterized in that formed on the surface of the first groove.

In one embodiment of the present invention, the boring section includes a first circular vertical portion and a round portion having a predetermined curvature below the first circular vertical portion, and the diameter of the first circular vertical portion is a circumscribed circle of the polygonal portion. It may be a dental implant assembly, characterized in that more than the diameter of.

In one embodiment of the present invention, the outer surface is composed of an upper thread section in which threads are formed at a single pitch and a shallow thread depth is formed up to a certain distance from the upper end, and a deep thread depth is formed below the upper thread section. It may be a dental implant assembly, characterized in that composed of a lower thread section in which the thread of the is formed.

In one embodiment of the present invention, the boring section is a dental implant work, characterized in that located above the first mountain or above the second mountain or above the third mountain from the lower boundary of the upper thread section. can

In one embodiment of the present invention, the average width of the first groove is 5 ~ 100㎛, the average depth is 5 ~ 50㎛, the average width and average depth of the second groove is 1 ~ 10㎛, dental It may be a dental implant.

In order to achieve the above object, another aspect of the present invention is an implant that is inserted into the alveolar bone to form an artificial tooth root according to a rotational motion about the axis and coupled to the implant to support the prosthesis and extends from the top to the bottom inside, A dental implant assembly including an abutment in which a fastening screw insertion hole into which a fastening screw is inserted is formed, wherein the implant includes an inner groove formed on an upper surface to which an abutment for supporting a prosthesis can be coupled, and an upper upper end and an outer surface on which a thread is formed from the bottom to the bottom, wherein the abutment includes an upper portion protruding out of the implant and attaching the prosthesis, and a lower portion disposed below the upper portion and inserted into the inner groove. The outer surface is divided into an upper region, a first lower region, and a second lower region according to a predetermined height, and is surface-treated by laser processing to form one or more first grooves, wherein the first lower region is formed. At least one of the average width and average depth of the first grooves of the upper region is greater than that of the first grooves of the upper region, and at least one of the average width and average depth of the first grooves of the second lower region is greater than that of the first grooves of the second lower region. Provided is a dental implant assembly formed larger than the first groove of the region.

According to one aspect of the present invention, the inner groove of the dental implant includes a boring section, so that the base material is driven to the bottom of the polygonal portion by a punching tool during polygonal portion processing, thereby preventing the concentration of compressive residual stress and crack nuclei. there is.

In addition, the upper region of the outer surface has a relatively low roughness to inhibit the growth of bacteria, while the lower region has a relatively high roughness to improve osseointegration performance.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is an exploded perspective view of a dental implant assembly according to an embodiment of the present invention.
Figure 2 is a combined cross-sectional view of a dental implant assembly according to an embodiment of the present invention.
3 shows an implant and a surface shape of the implant according to an embodiment of the present invention.
4 shows a perspective cross-sectional view of an implant according to an embodiment of the present invention.
5 shows a partially enlarged view of an implant according to an embodiment of the present invention.
6 shows a front view of an implant according to an embodiment of the present invention.
7 shows a cross-sectional view of an implant according to an embodiment of the present invention.
8 is a view for explaining details of a polygonal part processing method according to an embodiment of the present invention.
9 is a front view of an abutment according to an embodiment of the present invention.
Figure 10 is a perspective view of Figure 9;
11 is a partially enlarged view of FIG. 2 .
12 is a schematic diagram of a surface treatment method of an implant according to an embodiment of the present invention.
13 is a SEM image of the upper and lower regions of the exterior surface in one embodiment of the present invention.
14 shows an implant and a surface shape of the implant according to another embodiment of the present invention.
15 is a SEM image of an upper region, a first lower region, and a second lower region of an exterior surface in another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

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

1 is an exploded perspective view of a dental implant assembly according to an embodiment of the present invention, Figure 2 is a combined cross-sectional view of a dental implant assembly according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention Figure 4 shows a perspective cross-sectional view of an implant according to an embodiment of the present invention, Figure 5 shows a partially enlarged view of an implant according to an embodiment of the present invention, Figure 6 is a Shows a front view of an implant according to an embodiment of the present invention, Figure 7 shows a cross-sectional view of an implant according to an embodiment of the present invention, Figure 8 describes the details of a polygonal portion processing method according to an embodiment of the present invention It is a drawing for

Referring to FIGS. 1 and 2 , a dental implant assembly 1000 includes an implant 100 and an abutment 200 .

More specifically, the dental implant assembly 1000 is inserted into the alveolar bone according to a rotational motion about an axis to form an artificial tooth root, and the implant 100 is coupled to the implant 100 to support a prosthesis and is internally from top to bottom. It extends to and is configured to include an abutment 200 in which a fastening screw insertion hole 201 into which the fastening screw 300 is inserted is formed.

1 to 7, the implant 100 is inserted into the alveolar bone according to the rotational motion about the axis to perform the role of an artificial tooth root, and is formed on the upper surface so that an abutment for supporting the prosthesis can be combined. and an outer surface 120 threaded from top to bottom.

The inner groove 110 of the implant 100 includes an upper inclined portion 111, a polygonal portion 112, a boring section 113, and an internal threaded portion 116 from the upper end.

More specifically, the inner groove 110 has a circular cross section downward at a certain depth from the entrance of the upper surface of the implant, and the upper inclined portion 111 having a narrower inner diameter as it goes downward, and downward at a certain depth of the upper inclined portion 111. A polygonal portion 112 having a polygonal cross-sectional shape, and a threaded interior for abutment coupling having a diameter smaller than a circle inscribed in the polygon of the polygonal portion 112 below a certain depth of the polygonal portion 112 Between the threaded portion 116 and the lower end of the polygonal portion 112 and the upper end of the internal threaded portion 116, a diameter greater than or equal to the diameter of a circle circumscribed to the polygonal portion of the polygonal portion 112 is greater than the diameter of the polygonal portion 112. It is configured to include a circular boring section 113 formed earlier.

On the other hand, the inner groove 110 has a second circular vertical portion 114 having a smaller diameter than the boring section 113 below a certain depth of the boring section 113, and the second circular vertical portion 114 ) May further include an inner inclined portion 115 having a circular cross-section below a certain depth and having a narrower inner diameter toward the bottom. At this time, the internal threaded portion 116 may be located below the inner inclined portion 115 .

The upper inclined portion 111 extends downward from the upper end of the implant 100, and has a tapered shape in which the diameter decreases toward the lower side.

The polygonal portion 112 is disposed between the upper inclined portion 111 and the first boring section 113 and prevents the abutment inserted into the inner groove 110 from being rotated about the axis CL. In this embodiment, the polygonal portion 112 has a hexagonal shape, but is not limited thereto and may have various shapes.

The inner threaded portion 116 is a portion disposed below the inner inclined portion 115, and has a screw thread formed on the inner circumferential surface. A fastening screw inserted into the fastening screw insertion hole of the abutment may be screwed into the internal threaded portion 116 .

Meanwhile, referring to FIG. 8 , the boring section 113 may be formed ahead of the polygonal portion 112 by a diameter greater than or equal to the diameter of the circumscribed circle of the polygonal portion 112 .

In this boring section 113, the base material of the upper inclined portion 111 plastically deformed by the punching tool 10 when processing the polygonal portion 112 is driven to the bottom of the polygonal portion 112, and compressive residual stress and crack nuclei are concentrated. phenomenon is to be prevented. That is, as the boring section 113 is formed, the base material of the upper inclined portion 111 is mainly separated by the striking of the punching tool 10 or only partially pushed in the radially outward direction, and the base material is severely deformed It is pushed in and driven to the bottom of the polygonal portion 112, so that the problem of causing crack nuclei does not occur.

In other words, after processing the boring section 113 so that extreme plastic deformation is not caused to the base material, the polygonal portion 112 is formed through punching, the lower end of the polygonal portion 112 and the upper end of the internal threaded portion 116 In between, a circular boring section 113 having a diameter greater than or equal to the diameter of a circle circumscribed to a regular polygon of the polygonal portion is processed prior to the punching process of the polygonal portion 112.

The boring section 113 is not significantly limited in its shape as long as it can perform the above role, but more preferably, the boring section is below the first circular vertical portion 131 and the first circular vertical portion 131. It may include a round portion 132 having a certain curvature of the side.

More specifically, as shown in FIG. 8 (a), a boring section 113 is processed with a boring tool at the lower end of the upper inclined portion 111, and the boring section 113 is first circular vertical portion 131 and second. 1 may be made of a round portion 132 having a certain curvature below the circular vertical portion 131, and the radius of the boring section 113 is on the cross section of the punching tool 10 used in the polygonal portion 112 processing process It should be set more than the length from the geometric center to the corner (resultingly, this length corresponds to the radius of the circumscribed circle of the polygon part). That is, the diameter of the first circular vertical portion 131 may be greater than the diameter of the circumscribed circle of the polygonal portion 112 .

As shown in FIG. 8 (b), in the past, the workpiece of the base material is plastically deformed downward by the punching tool entering from the top and is forced into the situation, so the base metal is severely deformed and a large number of crack nuclei are distributed. However, as shown in FIG. 8 (c), according to the present invention, the punching tool cuts the workpiece area like a knife or scissors, or the side of the workpiece area cannot be driven to the lower corner (to the corner Even if it is driven, it is easily removed by a general deburring operation), so the problems of the existing technology discussed above can be eliminated.

On the other hand, referring to FIGS. 6 and 7, the outer surface 120 is formed with a single pitch (P), and the upper thread section ( 121), and below the upper thread section 210 may be composed of a lower thread section 122 in which a thread 122a having a deep bone depth D2 is formed. In addition, a line connecting the apex of the thread 121a of the upper thread section 121 and the apex of the thread 122a of the lower thread section 122 may be continuous from the upper end to the lower end of the implant 100 .

The lower surface of the round portion 132 of the boring section 113 may be located above the first mountain, above the second mountain, or above the third mountain from the lower boundary of the upper thread section 121. In this configuration, although the wall thickness portion that has been thinned due to the boring section 113 is not directly reinforced, the structural rigidity can be further increased below the boring section 113, so it functions as a better defense against fatigue fracture situations can do.

9 is a front view of an abutment according to an embodiment of the present invention, FIG. 10 is a perspective view of FIG. 9 , and FIG. 11 is a partially enlarged view of FIG. 2 .

Referring to FIGS. 2 and 9 to 11 , the abutment 200 is coupled to the implant 100 to support the prosthesis, and a fastening screw insertion hole 201 extending from the top to the bottom is formed therein.

The abutment 200 protrudes to the outside of the implant 100 and is disposed on the upper side 210 to which the prosthesis is attached and the lower side of the upper side 210, and the inner groove 110 of the implant 100 It includes a lower part 220 inserted into.

The lower part 220 includes a taper insertion part 230, an anti-rotation part 240, a cylindrical part 250, and a holding part 260.

The taper insert 230 is inserted into the upper inclined portion 111 of the implant 100 and may be formed in a shape corresponding to the upper inclined portion 111 .

The anti-rotation part 240 is inserted into the polygonal part 112 of the implant 100 to restrain the relative rotation of the abutment 200 with respect to the implant 100 . The anti-rotation part 240 may be formed in a shape corresponding to the polygonal part 112 .

The cylindrical portion 250 is disposed between the anti-rotation portion 240 and the holding portion 260 and is formed in a substantially cylindrical shape. At least a portion of the cylindrical portion 250 is inserted into the second circular vertical portion 114 of the implant 100. Specifically, at least a portion of the cylindrical portion 250 is inserted into the second circular vertical portion 114 together with the holding portion 260 .

The holding part 260 is disposed below the cylindrical part 250, and when the abutment 200 is inserted into the implant 100, it is tightly fitted to the inner circumferential surface of the second circular vertical part 114, The abutment 200 is temporarily fixed inside the implant 100. That is, the holding part 260 is temporarily fixed inside the implant 100 while having a difference in elasticity between the top and bottom (between the upper and lower ends). These holding parts 260 are spaced apart from each other and are composed of a plurality of projections having elasticity, and at least one pair is configured to be tightly fitted to the second circular vertical part 114 .

Steps 263 are formed on the inner surface of the holding portion 260 facing the fastening screw 300 so as to be spaced apart from the fastening screw 300 inserted into the fastening screw insertion hole 201 by a predetermined interval.

Meanwhile, the holding part 260 is composed of a first part 261 and a second part 262 . The first portion 261 has an outer surface extending vertically, and the second portion 262 extends downward from the first portion 261 and has an outer surface protruding outward to form the second circular vertical portion ( 114).

The step 263 includes an inclined surface 263a downwardly inclined in a direction away from the fastening screw 300 and a vertical surface 263b extending downward from the inclined surface 263a. This step 263 has a function to increase the elasticity of the holding part 260 and a function to prevent foreign substances from being caught between the abutment 200 and the fastening screw 300 in the implant 100. .

However, the shape of the step 263 is not limited to this, and in addition, the step may include a horizontal surface extending horizontally in a direction away from the fastening screw 300 and a vertical surface extending downward from the horizontal surface.

The fastening screw 300 is inserted into the fastening screw insertion hole 201 of the abutment 200, and the lower part is screwed into the internal threaded portion 116 of the implant 100 to secure the abutment 200 as above. It is for fixing to the implant 100.

12 is a schematic diagram of a surface treatment method of an implant according to an embodiment of the present invention, and FIG. 13 is a SEM image of an upper region and a lower region of an external surface according to an embodiment of the present invention.

The implant 100 may be a titanium-based material. The titanium-based material refers to a material made of pure titanium or an alloy of titanium and other metals on the periodic table. The titanium alloy is, for example, titanium (Ti), aluminum (Al), silicon (Si), vanadium (V), niobium (Nb), zirconium (Zr), molybdenum (Mo), chromium (Cr), tin ( Sn), tantalum (Ta), palladium (Pd), and may be one selected from the group consisting of at least one combination thereof, but is not limited thereto.

3, 12 and 13, the outer surface 120 of the implant 100 may be surface-treated through a laser processing step and an etching step, and one or more outer surfaces 120 are formed by laser processing. A macro surface including the first groove 123 may be formed, and a micro surface including one or more second grooves 124 may be formed on the outer surface 120 by an etching step.

That is, the external surface 120 of the processed implant 100 to which no surface roughness is applied may be processed by primarily laser processing. A macro surface having a uniform shape may be implemented by regularly forming one or more first grooves 123 by laser processing the outer surface 120 . When a micro-surface including one or more second grooves 124 is formed by etching the macro surface on which one or more first grooves 123 are formed, the surface area of the outer surface 120 increases, and as a result, the concavo-convex effect As the interfacial bonding force increases, the cell response after implant placement can be further activated.

In one embodiment, the outer surface 120 is partitioned into an upper area Ua and a lower area La according to a preset height, and the average width and average depth of the first groove 123 in the lower area La. At least one of them may be larger than the upper area Ua. In this case, the upper region Ua may refer to an area of 0.5 to 2 mm from the top to the bottom, and the lower region La may refer to the remaining area.

In one embodiment, the outer surface 120 is divided into an upper region Ua and a lower region La according to a predetermined height, and the upper region Ua is a portion in contact with cortical bone and has a depth of 1 to 15 μm, A first groove 123 having a width of 1 to 25 μm is formed, and the lower region La is a portion in contact with cancellous bone, and a first groove 123 having a depth of 20 to 75 μm and a width of 30 to 125 μm is formed. can That is, when a relatively small first groove 123 is formed in the upper region Ua and a relatively large first groove 123 is formed in the lower region La, the upper region Ua has a relatively low roughness. It is possible to inhibit the growth of bacteria, and at the same time, the lower region (La) has a relatively large roughness to improve osseointegration performance.

One or more first grooves 123 may be formed in a regular shape by laser processing the outer surface 120 of the implant 100 to impart macro surface characteristics. The laser may be a UV laser, and for example, a UV laser beam having an ultraviolet wavelength of 200 to 400 nm may be irradiated. The ultraviolet wavelength of the UV laser beam is, for example, 200 nm, 210 nm, 220 nm, 230 nm, 240 nm, 250 nm, 260 nm, 270 nm, 280 nm, 290 nm, 300 nm, 310 nm, 320 nm. , 330 nm, 340 nm, 350 nm, 360 nm, 370 nm, 380 nm, 390 nm or 400 nm, but is not limited thereto. Since the intensity of the laser beam increases as the ultraviolet wavelength of the UV laser beam decreases, considering the width and depth of the first groove 123 to be implemented on the outer surface 120 of the implant 100 of the present specification, the above range An appropriate value can be selected from

In addition, the pulse width of the laser may be 1 to 200ns (nano second), for example, 1ns, 2ns, 3ns, 4ns, 5ns, 6ns, 7ns, 8ns, 9ns, 10ns, 15ns, 20ns, 25ns, 30ns ,35ns,40ns,45ns,50ns,55ns,60ns,65ns,70ns,75ns,80ns,85ns,90ns,95ns,100ns,110ns,115ns,120ns,125ns,130ns,135ns,140ns,145ns, 150ns, 155ns, 160ns , 165ns, 170ns, 175ns, 180ns, 185ns, 190ns, 195ns, or 200ns, but is not limited thereto. The pulse width of the laser means the duration of the irradiated laser beam. If the pulse width of the laser is greater than 200 ns, the width and depth of the first groove 123 may increase excessively, and if it is less than 1 ns, the surface roughness may be reduced. The osseointegration properties may be degraded due to insufficient implementation.

Meanwhile, the average width of the first groove 123 may be 5 to 100 μm, and the average depth may be 5 to 50 μm. The average width of the first groove 123 is, for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, and 40 μm. , 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm or 100 μm, but is not limited thereto. If the average width of the first groove 123 exceeds 100 μm, durability of the implant 100 may deteriorate, and if it is less than 5 μm, osseointegration characteristics of the implant 100 may deteriorate.

In one embodiment, the difference between the maximum width and the minimum width of the first groove 123 is 50% or less, for example, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 15 %, 10%, 5% or a range between any two of these values. For example, if the difference between the maximum width and the minimum width is 50%, if the largest width of the first groove 123 is 100 μm, it means that the smallest width is 50 μm or more. If these characteristics are additionally satisfied, the osseointegration characteristics can be remarkably improved.

In addition, the average depth of the first groove 123 is, for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, It may be 40 μm, 45 μm or 50 μm, but is not limited thereto. If the average depth of the first groove 123 exceeds 50 μm, durability of the implant may deteriorate, and if it is less than 5 μm, osseointegration characteristics of the implant may deteriorate.

In one embodiment, the difference between the maximum and minimum depths of the first groove 123 is 50% or less, for example 50%, 45%, 40%, 35%, 30%, 25%, 20%, 15 %, 10%, 5% or a range between any two of these values. If these characteristics are additionally satisfied, the second grooves 124 forming the microsurface are more uniformly formed, thereby solving the problem of insufficient osseointegration in some areas.

One or more first grooves 123 are formed on the outer surface 120 by laser processing to provide surface roughness primarily, and then the outer surface 120 is etched to be larger than the first groove 123. One or more second grooves 124 having a small value may be formed to impart micro-surface characteristics.

The average width and average depth of the second groove 240 may be 1 μm to 10 μm, for example, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, It may be 9 μm or 10 μm, but is not limited thereto. If the average width and average depth of the second groove 124 are greater than 10 μm, durability of the implant 100 may deteriorate, and if they are less than 1 μm, osseointegration characteristics of the implant 100 may decrease.

In one embodiment, one or more second grooves 124 in the implant 100 may be formed inside the first groove 123 . When the microsurface is formed inside the macrosurface of the implant 100, the mutual coupling between the implant 100 and the bone is improved, and the healing period after the procedure can be shortened.

Meanwhile, the etching step may be performed by treating an etchant, and the etchant may be one selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid, hydrogen peroxide, and a mixture of two or more of them, but is not limited thereto. For example, when the etchant is a mixture of hydrochloric acid and sulfuric acid, the hydrochloric acid content may be 50 to 100 vol%, for example 50 vol%, 55 vol%, 60 vol%, 65 vol%, 70 vol%, 75 vol%, 80 vol%, 85 vol%, 90 vol%, 95 vol% or 100 vol%, but is not limited thereto.

In one embodiment, the etching may be performed for 10 seconds to 120 minutes, for example, 10 seconds, 30 seconds, 60 seconds, 3 minutes, 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, 60 minutes, 65 minutes, 70 minutes, 75 minutes, 80 minutes, 85 minutes, 90 minutes, 95 minutes, 100 minutes, 105 minutes, 110 minutes , 115 minutes, 120 minutes, or a time range between these two values. Etching time may vary depending on the type of etching solution, and may generally be performed for 10 to 40 minutes, but is not limited thereto.

14 shows an implant and a surface shape of the implant according to another embodiment of the present invention, and FIG. 15 is an SEM image of an upper region, a first lower region, and a second lower region of the external surface in another embodiment of the present invention. .

12, 14, and 15, the outer surface 120 is divided into an upper region Ua, a first lower region La1, and a second lower region La2 according to a predetermined height, At least one of the average width and average depth of the first grooves 123 in the second lower region La2 is greater than that of the first lower region La1, and the first grooves 123 in the first lower region La1 At least one of the average width and average depth of 123 may be larger than that of the upper region Ua.

In this case, the upper region Ua of the outer surface 120 may have first grooves 123 having an average depth of 1 to 15 μm and an average width of 1 to 25 μm, and the first lower region La1 may have an average depth of 1 to 25 μm. The first groove 123 having an average depth of 40 to 75 μm and an average width of 70 to 125 μm may be formed in the first groove 123 ( 123) can be formed.

In this way, the outer surface 120 is divided into three or more regions of the upper region Ua and the first and second lower regions La1 and La2, and the surface roughness increases toward the lower region, thereby suppressing the growth of bacteria and The osseointegration properties can be improved in a balanced way.

In addition, the description of the average width and average length of the first groove and the second groove, the performance conditions of the laser processing as a surface treatment method, the performance conditions of the etching treatment, and the effect thereof are as described above.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

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

1000 Dental Implant Assemblies
100 implants
110 inner groove
111 upper slope
112 polygon part
113 boring section
113a first circular vertical portion
113b round part
114 second circular vertical part
115 inner slope
116 internal thread
120 outer surface
121 upper thread section
121a thread
122 lower thread section
122a thread
123 first home
124 second home
200 abutment
201 fastening screw insertion hole
210 upper part
220 lower part
230 taper insert
240 anti-rotation
250 cylinder
260 holding part
261 first part
262 second part
263 steps
263a stepped slope
263b stepped vertical plane
300 fastening screw
10 punching tool
Ua upper area
La lower area
La1 first lower region
La2 second lower region

Claims (10)

An implant that is inserted into the alveolar bone to form an artificial tooth root according to a rotational motion about the axis, and an abutment that is coupled to the implant to support the prosthesis and extends from the top to the bottom inside and has a fastening screw insertion hole into which a fastening screw is inserted. In the dental implant assembly comprising,
The implant includes an inner groove formed on an upper surface to which an abutment for supporting the prosthesis can be coupled, and an outer surface on which a thread is formed from the upper end to the lower end,
The abutment includes an upper portion protruding out of the implant and to which the prosthesis is attached, and a lower portion disposed below the upper portion and inserted into the inner groove,
The outer surface is divided into an upper region and a lower region according to a predetermined height, and the surface is treated by laser processing to form one or more first grooves, wherein at least among the average width and average depth of the first grooves in the lower region One is formed larger than the first groove of the upper region, dental implant assembly. According to claim 1,
The inner groove,
an upper inclined portion having a circular cross-section downward at a predetermined depth from the entrance of the upper surface and having a narrower inner diameter toward the lower side;
A polygonal portion having a polygonal cross-sectional shape below a predetermined depth of the upper inclined portion;
a circular boring section having a diameter greater than or equal to a diameter of a circle circumscribed to the polygon of the polygonal portion below a predetermined depth of the polygonal portion and formed ahead of the polygonal portion;
a second circular vertical portion having a diameter smaller than that of the boring section at a predetermined depth below the boring section; and
A dental implant assembly including an internal screw portion formed with a screw thread for coupling an abutment having a smaller diameter than a circle inscribed in a polygon of the polygonal portion below a predetermined depth of the second circular vertical portion. According to claim 2,
The abutment,
It is disposed at the lower end of the lower part and is elastically deformed when the abutment is inserted into the implant, and the holding part is fitted to the inner circumferential surface of the second circular vertical part to temporarily fix the abutment to the inside of the fixture. Further comprising , dental implant assemblies. According to claim 1,
The outer surface is surface treated by etching after laser processing to form one or more second grooves, dental implant assembly. According to claim 4,
The second groove is characterized in that formed on the surface of the first groove, dental implant assembly. According to claim 2,
The boring section,
a first circular vertical portion; and
A round portion having a certain curvature below the first circular vertical portion,
The dental implant assembly, characterized in that the diameter of the first circular vertical portion is greater than or equal to the diameter of the circumscribed circle of the polygonal portion. According to claim 2,
The outer surface is formed with a single pitch thread, and consists of an upper thread section with a shallow thread depth up to a certain distance from the upper end, and a lower thread section with a deep thread depth below the upper thread section. Characterized in that, dental implant assembly. According to claim 7,
Characterized in that, the boring section is located above the first mountain, above the second mountain, or above the third mountain from the lower boundary of the upper thread section. According to claim 4,
The average width of the first groove is 5 to 100 μm, the average depth is 5 to 50 μm, and the average width and average depth of the second groove are 1 to 10 μm. An implant that is inserted into the alveolar bone to form an artificial tooth root according to a rotational motion about the axis, and an abutment that is coupled to the implant to support the prosthesis and extends from the top to the bottom inside and has a fastening screw insertion hole into which a fastening screw is inserted. In the dental implant assembly comprising,
The implant includes an inner groove formed on an upper surface to which an abutment for supporting the prosthesis can be coupled, and an outer surface on which a thread is formed from the upper end to the lower end,
The abutment includes an upper portion protruding out of the implant and to which the prosthesis is attached, and a lower portion disposed below the upper portion and inserted into the inner groove,
The outer surface is divided into an upper region, a first lower region, and a second lower region according to a predetermined height, and is surface treated by laser processing to form one or more first grooves,
At least one of the average width and average depth of the first grooves in the first lower region is greater than that of the first grooves in the upper region, and at least one of the average width and average depth of the first grooves in the second lower region is The dental implant assembly formed larger than the first groove of the second lower region.

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