Dental implant abutment

Abstract

The present invention relates to an abutment for a dental implant, and the abutment for a dental implant according to the present invention is characterized by comprising: a prosthesis fastening and connecting protrusion which protrudes to the outside and in which the outer diameter of the upper end portion of the abutment on which a prosthesis is attached is formed so as to have a longer outer diameter than the directly lower portion thereof; and a cutting part for cutting the upper part of the base into a plurality of slices, the distance values from the vertical central axis (C) of the base to the outer side surface of the fastening-connecting projection are different according to positions when the prosthesis fastening-connecting projection is viewed from a horizontal cross-sectional view, and preferably, the distance values from the vertical central axis (C) of the base to the outer side surface of the fastening-connecting projection are different according to positions when the prosthesis fastening-connecting projection is viewed from the horizontal cross-sectional view. The distance value from the vertical central axis (C) of the base to the outer side surface of the fastening and connecting projection continuously decreases as the distance value approaches the cut-out part, and the distance value at the outer side surface center part (F) of the slice cut by the cut-out part is the largest.

Description

Technical Field

[0001] The invention relates to a base for a dental implant. In the dental implant, a prosthesis is firmly connected to the upper part of the base for the dental implant. Background Art

[0002] Generally, dental implants are used as replacements for lost natural teeth. They are natural tooth replacements that are implanted in the alveolar bone to fuse with the alveolar bone within a specified period of time, and then abutments and artificial teeth are fixed on them to restore the original functions of the teeth.

[0003] The implant used for artificial tooth surgery includes: a fixture, which has a thread formed on the outer peripheral surface so that it can be implanted into the alveolar bone and has an axial hole formed along the vertical central axis; an abutment, whose lower part is inserted into the fixture axial hole and a prosthesis is attached to the upper part; and a fixing screw, which makes the fixture and the abutment fastened and firmly fixed, and the abutment has a screw insertion hole formed along the vertical central axis. Depending on the situation, the abutment and the fixing screw are also formed in an integrated form.

[0004] In other words, the base is fastened and fixed to the fixed body by a separate fixing screw or a fixing screw formed in an integral form at the lower part. The previous separate fixing screw is composed of a head, a threaded part, and a main body connecting the head and the threaded part, and a polygonal groove for inserting a jig is formed on the upper end surface of the head, and a thread is formed at the lower part of the main body to form a threaded part.

[0005] In addition, a base independently formed by a fixing screw fastened to a fixing body is formed with a screw insertion shaft hole extending from the upper end to the lower end, and the outer side surface of the base is composed of a portion inserted into the fixing body shaft hole and a portion for attaching a prosthesis, and the inner side surface of the screw insertion shaft hole is formed with a step portion D for preventing the fixing screw from moving downward, which contacts the bottom surface C of the head of the fixing screw.

[0006] In the type in which the abutment and the fixing screw are separated, when the fixing screw is tightly connected, the operator places the abutment in the axial hole of the fixed body, and inserts the fixing screw in a form that allows the fixing screw to penetrate the insertion hole of the abutment until it reaches the axial hole of the fixed body. Then, the fixing screw is rotated by inserting a jig such as a screwdriver into the polygonal groove formed on the upper end surface of the fixing screw head, so that the bottom surface C of the fixing screw head is formed on the inner side surface of the screw insertion axial hole of the abutment, and contacts the anti-fixing screw downward movement step D that prevents the fixing screw from moving downward, and the head of the fixing screw presses the abutment toward the fixed body. Therefore, in a state in which the thread formed on the outer side surface of the fixing screw is tightly connected with the thread formed on the inner side surface of the axial hole of the fixed body, a strong tensile force is applied between the head of the fixing screw and the threaded portion, resulting in the abutment being firmly fixed to the fixed body by the fixing screw, and the prosthesis is bonded to the abutment firmly fixed in this way by using an adhesive.

[0007] However, as described above, in the previous implants in which the fastening connection force between the fixed body and the base is obtained by tightening the screw and the prosthesis is fixed by an adhesive, the previous fixing screw is fastened to the axial hole [i.e., a nut] of the fixed body and then tightened, so that the fixing screw obtains a tensile force along the length direction, resulting in the upper surface of the thread of the fixing screw being strongly adhered to the lower surface of the thread of the axial hole of the fixed body, thereby exerting a considerable fastening connection force, but there are the following basic problems or limitations.

[0008] For example, when a conventional fixing screw is tightened strongly so that the fixing screw can sufficiently and firmly fix the base to the fixed body, and the tension generated between the head and the threaded portion of the fixing screw is referred to as N, if the tension generated by the tightening of the fixing screw is applied to a level weaker than N, the desired sufficient tension cannot be obtained, and a strong fastening force cannot be obtained.

[0009] In other words, when a tensile force weaker than N is applied between the head and the threaded portion of the fixing screw by weak tightening, the force of the upper surface of the thread of the fixing screw and the lower surface of the thread on the inner side surface of the axial hole of the fixture is also weakened, thereby weakening the fastening connection force between the threads. In this case, the fixing screw gradually loosens even under low rotational forces caused by continuous vibration or impact caused by the bite force applied to the prosthesis, and thus the abutment coupled to the fixture often shakes.

[0010] In addition, in order to prevent the phenomenon as described above and to prevent the fixing screw from loosening, if the fixing screw material is permanently deformed by overtightening in order to apply a tensile force stronger than N, fatigue will accumulate in the fixing screw material itself, and when the fixing screw is continuously subjected to other impacts such as bite force, the fixing screw will be more likely to break.

[0011] Furthermore, a problem with conventional abutments is that when bite forces in various directions are continuously applied to the abutment, the applied stress is transmitted to the fixing screw in an unbuffered state and continues to accumulate between the head and the threaded portion of the fixing screw, eventually causing the fixing screw to loosen and break.

[0012] As an example, Figure 8 As shown, the problem is that when a lateral occlusal force is applied to the abutment, a rotational force is generated on the abutment with the portion where the abutment and the fixing body are in close contact as a reference point, and due to this rotational force, a force is generated to push the fixing screw upward, which applies a force that makes the abutment strongly press downward. This stress continues to accumulate and may cause the fixing screw to break.

[0013] Internal type (internal type) In the type, usually after the fixture and the abutment are fastened together, due to the bite force continuously applied without a buffering effect, the position of the abutment will sink downward over time compared to the vertical position in the shaft hole of the fixture when it was initially tightened with the fixing screw. In this case, a gap is generated between the bottom surface C of the head of the fixing screw and the anti-movement step D of the fixing screw formed on the inner side of the screw insertion shaft hole of the abutment, so that the head of the fixing screw can no longer perform the function of pressing the abutment downward to fix it to the fixture. Since no tension is generated between the head of the fixing screw and the threaded portion, the upper surface of the thread formed on the fixing screw will not strongly contact the lower surface of the thread formed on the inner side of the shaft hole of the fixture. In this state, the abutment moves in the shaft hole of the fixture. Furthermore, whenever the bite force is applied from various directions, the stress cannot be evenly dispersed and is concentrated in a certain place. As a result, problems such as alveolar bone destruction and abutment neck (abutment The problem with existing abutments is that, in order to prevent the problems caused by this sinking phenomenon, only the following complicated method can be used: after the initial tightening and connection of the fixing screw, the fixing screw is used for a certain period of time in a form in which a bite force is applied to the abutment, and then the fixing screw is tightened again so that the head of the fixing screw strongly contacts one side of the abutment. In addition, when the head of the fixing screw contacts one side of the abutment and strongly adheres to the fixing body side, lateral pressure is continuously applied to the prosthesis, and the tensile force and lateral force are transmitted to the fixing screw through the abutment, resulting in loosening or breaking of the fixing screw.

[0014] In addition, as described above, when the fixing screw is broken due to various reasons, it has been difficult to remove the broken pieces of the fixing screw remaining in the state where the nut portion is fastened to the inner surface of the axial hole of the fixing body. In some cases, it is even impossible to completely remove the broken pieces of the fixing screw.

[0015] As described above, conventional abutments without a bite force buffering function have caused many problems.

[0016] In addition, in the past, after the abutment was combined with the fixture, in order to combine the prosthesis with the upper part of the abutment, the prosthesis was inserted into the upper part of the abutment while applying additional adhesive inside the prosthesis and the upper part of the abutment, and the prosthesis was pressed in the direction of the abutment (i.e., the lower side) for a considerable period of time, thereby attaching the prosthesis to the upper part of the abutment. In this case, the problem is that the operator must apply additional adhesive to attach the prosthesis, and then after the adhesive is cured, the adhesive residues remaining between the prosthesis and the abutment / gingiva must be removed one by one, and the patient needs to wait while the prosthesis is continuously pressed on the gingival side during the curing of the adhesive, etc., which causes a lot of trouble and inconvenience during the operation.

[0017] In addition, there is a problem that when the prosthesis is fixed to the abutment with an adhesive, it often occurs that the adhesive is separated and the prosthesis is separated and detached from the abutment due to continuous biting force, and when it is desired to remove the prosthesis fixed to the abutment due to some problem, it takes a lot of time and pain. Summary of the invention

[0018] The object of the present invention is to provide a base for dental implants, which has a cutting portion that divides the upper part of the base into multiple slices from the upper end surface of the base combined with the prosthesis to a certain interval below, and in order to improve the elasticity of the slices that affect the occlusal force buffering function, the certain interval of the cutting portion that divides the upper part of the base into multiple slices is formed into a spiral or oblique shape, thereby extending the length of the slice and making the slice have a spiral shape, thereby maximizing the elastic restoring force. As a result, when the occlusal force is applied, the buffering function is provided with a strong elastic force to improve the problems of the previous implant caused by the lack of the occlusal force buffering function, thereby solving the inconvenience points and extending the life of the implant.

[0019] Another object of the present invention is to provide a base for a dental implant, in which, in the cutting portion that divides the upper end of the base into multiple slices, the width of the cutting portion at the lower part is formed to be significantly smaller than the width of the cutting portion at the upper part, thereby increasing the strength of the slice by increasing the volume of the slice, and the cutting portion is formed in a spiral or oblique shape to form an inclined surface. When the slice is deformed due to the occlusal force, the significantly reduced cutting portion width at the lower part and the inclined surface formed by the spiral cutting portion can quickly contact the adjacent slices even when the deformation is small, compared with the vertically formed cutting portion, so that the applied occlusal force is well dispersed to the adjacent slices.

[0020] Generally, in the present invention, after the prosthesis is fixed to the base in which the upper part of the base is separated into a plurality of slices by the cutout part, in order to exert the bite force buffering function as described above, when the bite force is applied to the slices separated into a plurality by the cutout part formed in the upper part of the base, it is necessary to buffer the bite force by elastic movement and restore it again, so even after the prosthesis is fixed to the base, any solidified substance cannot be filled in the space between the slices. Therefore, when an adhesive filled between the slices is used as a method for fixing the prosthesis to the base, the adhesive is solidified after filling between the slices, so that the slices cannot be elastically moved, resulting in a substantial loss of the buffering function. Another object of the present invention is to provide a dental implant base with a occlusal force buffering function in order to solve this problem. In order to elastically combine the prosthesis and the base, a prosthesis fastening connection protrusion with a diameter larger than the diameter of the directly below portion is provided on the upper portion of the base divided into multiple slices. When the prosthesis is inserted and coupled to the upper portion of the dental implant base, the multiple slices enter the coupling hole of the prosthesis and elastically deform inwardly and then return to their original shape. The prosthesis fastening connection protrusion on the upper portion of the base is meshed with and fastened to the corresponding fastening connection groove portion in the coupling hole of the prosthesis. Therefore, through the elastic restoring force of the multiple slices, the prosthesis fastening connection protrusion can be simply and firmly coupled to the corresponding fastening connection groove portion of the prosthesis without adding adhesive.

[0021] Another object of the present invention is to provide a dental implant abutment with an occlusal force buffering function, wherein at the lower portion of the abutment inserted into the axial hole of the fixing body, spiral, oblique or vertical slot cut portions with upper and lower ends sealed are formed at regular intervals along the circumference, so that the multiple independent surfaces formed along the circumference by the slot cut portions are deformed within the elastic range as the fixing screw is tightened, and are tightly attached to the inclined surface of the inner side surface of the axial hole of the fixing body. At this time, the elastic rebound force generated by the surface that is deformed and tightly attached within the elastic range generates a force to push the abutment upward. Based on this result, a force is generated to continuously push the fixing screw that is in contact with the anti-movement step D below the fixing screw of the abutment upward, so that the upper threaded surface 2a of the fixing screw is tightly attached to the lower threaded surface 3a formed on the inner side surface of the axial hole of the fixing body, thereby preventing the fixing screw from loosening, and can be restored after elastic deformation even when an occlusal force is applied.

[0022] Another object of the present invention is to provide a base for a dental implant separately configured with a fixing screw, by horizontally penetrating the vertical center axis of the fixing screw at the upper or lower part of the thread of the fixing screw to bisect the cross section at right angles to the vertical center axis of the main body, and by having a spiral cut portion with a certain length of spiral shape at the top and bottom, the fixing screw itself has sufficient tensile force, elastic restoring force and buffering function, so that it can not only maintain a firm fastening connection force for a long time, but also effectively buffer the bite force continuously applied from the side or all directions, thereby preventing the fixing screw from breaking due to stress accumulation or concentration in advance.

[0023] In addition, the present invention aims to easily remove the broken pieces of the fixing screw remaining in the nut portion of the inner surface of the shaft hole of the fixing body by inserting a flat-shaped screwdriver into the flat-shaped cut portion exposed to the broken cross section and rotating it.

[0024] In addition, another object of the present invention is that since the threaded upper surface 12a of the fixing screw and the threaded lower surface 3a formed on the inner side of the axial hole of the fixed body are strongly fastened together by the elastic force of the spiral cut portion between the head of the fixing screw and the threaded portion, there is no cold pressure welding phenomenon, so the fixing screw portion remaining when the fixing screw is broken can be easily removed.

[0025] In addition, another object of the present invention is that the cut portion on the upper part of the threaded portion of the fixing screw forms a spiral shape in a certain interval and has a strong elastic restoring force. When the abutment and the fixing body are tightened and connected, the spiral shape interval is deformed within the elastic range and strongly combined. Even if the internal type abutment moves downward and sinks due to the continuous bite force after the initial tightening connection, even if there is no process of retightening the fixing screw, the spiral shape interval will also be elastically deformed, so that the abutment and the fixing body are tightly attached with a force above a certain level.

[0026] In addition, another object of the present invention is that, in a part of the abutment, when inserting and combining the prosthesis, there is no need to make structural changes, such as deleting the portion where the prosthesis fastening connection protrusion of the abutment interferes with the combining hole of the prosthesis or increasing the width of the abutment cutout portion, etc., thereby ensuring the structural rigidity of the prosthesis fastening connection protrusion itself.

[0027] In addition, another object of the present invention is to form a prosthesis fastening protrusion by protruding outward with different values ​​on the outer side surface of a plurality of slices cut by a cutting portion formed on the upper part of the base, and the prosthesis fastening protrusion is inserted into the combining hole of the prosthesis, and meshes and fastens with the corresponding form of the fastening groove portion of the prosthesis, thereby preventing the prosthesis from rotating and specifying the fastening position without performing separate planar portion processing on the base.

[0028] In order to achieve the above-mentioned purpose, one embodiment of the present invention is a base for a dental implant, characterized in that it includes: a prosthesis fastening connection protrusion, which protrudes outward, and the outer diameter of the upper end portion of the base for mounting the prosthesis is formed to have a larger outer diameter than the portion directly below it; and a cutting portion, which divides the upper portion of the base into multiple slices, when the prosthesis fastening connection protrusion is viewed from a horizontal cross-sectional view, the distance value from the vertical center axis C of the base to the outer side surface of the fastening connection protrusion has a different form depending on the position.

[0029] Preferably, when viewing the prosthesis fastening protrusion from a horizontal cross-sectional view, the distance value from the vertical center axis C of the base to the outer side surface of the fastening protrusion decreases continuously as it approaches the incision portion, and the distance value is the largest in the central part F of the outer side surface of the slice separated by the incision portion.

[0030] According to the present invention, the prosthesis can be combined with the upper part of the base by simple operation without adhesive, and a strong fastening connection force can be maintained for a long time, and the bite force continuously applied from the side or all directions can be effectively buffered to prevent the loosening and breaking of the fixing screw caused by stress accumulation or concentration in advance, and prevent the cold pressure welding of the insertion part of the base in the fixed body shaft hole. When the base needs to be separated from the fixed body, it can be easily removed, and when the fixing screw is broken, a flat-head screwdriver can be inserted into the cut part exposed in the broken section and rotated, so that the broken piece of the fixing screw remaining in the nut part of the inner surface of the fixed body shaft hole can be easily removed. When combining the prosthesis, there is no need to make structural changes, such as deleting the part that interferes with the combination hole during insertion or increasing the width of the cut part, so that the structural rigidity of the protrusion of the prosthesis fastening connection can be ensured, and there is no need to process the plane part of the base separately, and the rotation of the prosthesis and the specific fastening position can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1a is a perspective view of a fixing screw according to an embodiment of the present invention.

[0032] Figure 1b It is shown Figure 1a AA section view and stereoscopic view of its broken section.

[0033] Figure 2a FIG. 1 is a perspective view of an implant abutment according to an embodiment of the present invention.

[0034] Figure 2b is a stereoscopic view of an implant abutment according to another embodiment of the present invention.

[0035] Figure 3a is a diagram showing a single arrangement according to an embodiment of the present invention. Figure 1a The fixing screw and Figure 2a A cross-sectional view of the implant combined with the abutment.

[0036] Figure 3b The fixing screw is shown in Figure 3a Conceptual diagram of the effect on the implant abutment in the combined state.

[0037] Figure 4a is a stereoscopic view of an implant abutment according to yet another embodiment of the present invention.

[0038] Figure 4b is a stereoscopic view of an implant abutment according to yet another embodiment of the present invention.

[0039] Figure 5 a is a cross-sectional view of a fixing screw according to another embodiment of the present invention, Figure 5 b is shown Figure 5A conceptual diagram of the role of the fixing screw shown in a.

[0040] Figure 6 is a perspective view of a fixing screw according to another embodiment of the present invention.

[0041] Figure 7 is a perspective view of a prosthesis X according to the present invention bonded to the upper portion of an abutment without adhesive.

[0042] Figure 8 4 is a cross-sectional view of a modified embodiment in which the inclination of the outer side surface of the base is changed according to still another embodiment of the present invention.

[0043] Fig. 9 It is a stereoscopic view of a deformed embodiment of a prosthesis fastening projection according to yet another embodiment of the present invention.

[0044] Fig.10 is a cross-sectional view of a modified embodiment of the base upper portion according to still another embodiment of the present invention.

[0045] Fig.11 is a cross-sectional view of an implant abutment according to yet another embodiment of the present invention.

[0046] Fig.12 4 is a cross-sectional view of a modified embodiment of a prosthesis fastening protrusion according to yet another embodiment of the present invention.

[0047] Fig.13 It is used to explain the Fig.12 Reference diagram of the effects that can be obtained during surgery of the abutment of the modified embodiment shown in FIG.

[0048] Fig.14 This is a cross-sectional view showing the force of pushing the fixing screw upward by the rotational force generated when the lateral bite force is applied to the abutment in the conventional technology.

[0049] Fig.15 (a) is a stereoscopic view of an implant base according to another embodiment of the present invention, Fig.15 (b) Looking down from above Fig.15 (a) Plan view.

[0050] Fig.16 (a) shows the beginning of the combination of prosthesis X Fig.15 (a) is a cross-sectional view of the upper portion of the implant abutment. Fig.16 (b) shows the Fig.16 (a) The cross section taken along the BB and CC lines.

[0051] Fig.17 (a) shows the prosthesis X being fastened to Fig.15(a) is a cross-sectional view of a hypothetical stage before the upper portion of the implant abutment is shown, Fig.17 (b) shows the Fig.17 (a) A cross section cut along line AA to show where interference occurs when the prosthesis is combined.

[0052] Fig.18 (a) is to remove Fig.17 (b) is a plan view of a modified embodiment of a prosthesis fastening projection with additional deletion processing to eliminate the interference portion shown in FIG. Fig.18 (b) shows that when Fig.18 (a) The prosthesis fastening projection is inserted into Fig.17 The corresponding position of (a) is the cross section cut along the CC line.

[0053] Fig.19 (a) shows that the prosthesis X is fully fastened to Fig.18 (a) is a cross-sectional view showing the state of the upper portion of the implant abutment, Fig.19 (b) shows the Fig.19 (a) Cross section cut along line DD.

[0054] Fig. 20 (a) is a stereoscopic view of an implant base according to another embodiment of the present invention, Fig. 20 (b) Looking down from above Fig. 20 (a) Plan view.

[0055] Fig.21 (a) shows the beginning of the combination of prosthesis X Fig. 20 (a) is a cross-sectional view of the upper portion of the implant abutment. Fig.21 (b) shows the Fig.21 (a) The cross section taken along the BB and CC lines.

[0056] Fig. 22 (a) shows the prosthesis X being fastened to Fig. 20 (a) is a cross-sectional view of a stage before the upper portion of the implant abutment is shown, Fig. 22 (b) shows the Fig. 22 (a) Cross section cut along line CC.

[0057] Fig.23 (a) shows that the prosthesis X is fully fastened to Fig. 20 (a) is a cross-sectional view showing the state of the upper portion of the implant abutment, Fig.23 (b) shows the Fig.23 (a) Cross section cut along line DD. DETAILED DESCRIPTION

[0058] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0059] Figure 1a is a stereoscopic diagram of a fixing screw according to an embodiment of the present invention, Figure 1b It is shown Figure 1a AA section view and stereoscopic view of its broken section. Figure 2a is a stereoscopic view of an implant base according to an embodiment of the present invention, Figure 2b is a stereoscopic view of an implant abutment according to another embodiment of the present invention.

[0060] Reference Figure 2a In the dental implant base 200 of the present invention, the upper outer side surface of the base for mounting the prosthesis maintains a tapered angle in which the outer diameter decreases as the prosthesis edge portion is located upward, and the portion directly below the upper end surface forms an outer diameter larger than that of the portion directly below, and a prosthesis fastening and connecting protrusion 210 protruding outward from the tapered surface is formed. In addition, as Figure 2a and Figure 2b As shown, the cutting parts 220, 220' that divide the upper part of the base into multiple slices are formed by continuously connecting a certain interval from the upper end surface of the base toward the lower side. Preferably, the cutting parts 220, 220' are formed at least two or more places on the upper part of the base, and the upper part of the base can be divided into at least two or more slices. For reference, Figure 2a The figure shows that the upper part of the base is divided into four slices by four incisions. Figure 2b The abutment upper portion is shown divided into two slices by two cuts.

[0061] As described above, the upper portion of the base is configured to be cut into a plurality of slices by the cut portion, so that when the prosthesis is inserted and coupled to the upper portion of the base for dental implants according to the present invention, the plurality of slices can be elastically deformed inward while entering the coupling hole of the prosthesis, and when the prosthesis fastening protrusion 210 is engaged and fastened with the corresponding fastening groove portion X1 in the coupling hole of the prosthesis X, the elastic restoring force of the plurality of slices can make the prosthesis fastening protrusion 210 firmly coupled to the corresponding fastening groove portion X1. According to the present invention, Figure 7 As shown, the prosthesis X can be combined to the upper part of the base 200 through a simple operation without using an adhesive.

[0062] Preferably, a portion of the circumferential surface where the prosthesis fastening protrusion 210' is formed, such as Figure 2b As shown, a plane portion 250 is formed. Such a plane portion 250 specifies the installation direction of the prosthesis when the prosthesis is fixed, and performs the function of preventing the prosthesis from rotating after installation. Preferably, the plane portion can also be formed as an inclined surface with a taper angle that is the same as or greater than the taper angle of the base.

[0063] More preferably, if Figure 2a and Figure 2b As shown, the cutouts 220 and 230 are formed by continuously connecting a certain interval from the upper end surface of the base toward the lower side, and the certain interval is formed in a spiral or oblique line shape. Such a spiral or oblique line cutout is used to further increase the elastic deformation force and elastic restoring force of the upper part of the base, and at the same time supplement the bite force buffering function of the base itself and the anti-loosening function of the fixing screw.

[0064] In other words, the cutouts 220 and 230 can buffer the bite force by forming the cutouts in a spiral or oblique shape so that the multiple independent surfaces formed along the circumference are deformed within an elastic range. In particular, the multiple independent surfaces formed along the circumference continuously deform and recover within the elastic deformation limit, thereby buffering the continuous bite force applied when chewing food.

[0065] In particular, it is preferred that the cutting direction of the spiral or oblique cut portion formed in a certain section extending from the upper part to the lower part of the cut section is formed in the same direction as the rotation direction of the fixing screw for fastening and connecting the fixing body, and the effect is that when the occlusal force is applied to the base through the prosthesis, in the process of transmitting the occlusal force through the spiral cut portion of the spiral shape formed on the upper part of the base, the function of making the force act in the direction of fastening and connecting the fixing screw of the lower part can be exerted, and the effect of preventing the loosening of the fixing screw can be obtained. In particular, in the base where the fixing screw and the part where the prosthesis is combined are formed in an integral shape, a greater effect of preventing the loosening of the fixing screw can be exhibited.

[0066] Figure 4a is a stereoscopic view of an implant base according to another embodiment of the present invention, Figure 4b is a stereoscopic view of an implant abutment according to yet another embodiment of the present invention.

[0067] Reference Figure 4a and Figure 4b According to another embodiment of the present invention, a dental implant base 300 in which a prosthesis mounting portion and a threaded portion are formed in an integrated form includes: a threaded portion 360 having a predetermined vertical length and having a thread formed on the outer peripheral surface; a prosthesis mounting portion 340 formed in an integrated form on the upper portion of the threaded portion and fixing the prosthesis; and a main body 350 connecting the threaded portion and the prosthesis mounting portion and having a spiral cut portion 352 of a certain length in a spiral shape formed along the length direction. The spiral cut portion 352 horizontally penetrates the vertical central axis of the main body and forms a certain length along the length direction of the vertical central axis of the main body, so as to be formed in the form of bisecting a cross section at right angles to the vertical central axis.

[0068] As described above, the upper outer side surface of the base for mounting the prosthesis of the prosthesis mounting portion is as follows Figure 4a As shown, the outer diameter of the prosthesis is gradually reduced upward from the portion P where the edge of the prosthesis is located, and the portion directly below the upper end surface has a larger outer diameter than the portion directly below, and protruding protrusions 310, 310' protruding outward from the tapered surface are formed to fasten the prosthesis. Figure 4a and Figure 4b As shown, the cutting parts 320, 320' that divide the upper part of the base into multiple slices are formed by continuously connecting a certain interval from the upper end surface of the base toward the lower side, and the certain interval is formed in a spiral or oblique shape. Preferably, at least one cutting part 320, 320' is formed on the upper part of the base, and the upper part of the base can be divided into at least two slices.

[0069] As described above, the slice having a protrusion with a larger diameter than the portion directly below on the upper outer side surface of the base is deformed toward the vertical center axis during the process of installing the prosthesis, and then returns to its original shape and is combined with the groove portion formed on the bottom surface of the inner axial hole of the prosthesis, so that the base and the prosthesis can be combined without adhesive. In addition, the slice has a spiral or oblique spiral shape of a certain range rotating around the vertical center axis of the base through the spiral or oblique cut portion, so that the bite force applied when chewing food can be buffered.

[0070] Preferably, a plane portion 350 having a taper angle equal to or greater than that of the abutment is formed on a portion of the circumferential surface where the prosthesis fastening protrusion 310' is formed. Such a plane portion 350 specifies the installation direction of the prosthesis and supplements the function of preventing the prosthesis from rotating.

[0071] Reference Figure 1a and Figure 1b The fixing screw 100 separately provided on the base for dental implant of the present invention comprises: a threaded portion 12 having a specified vertical length and having threads 12a and 12b formed on the outer peripheral surface; a head 20 formed on the upper side of the threaded portion and having a polygonal coupling groove 22 for inserting a screwdriver formed on its upper end surface; and a main body 10 connecting the threaded portion 12 and the head 20 and having a spiral cut portion 14 with a spiral shape of a certain length formed along the length direction.

[0072] Preferably, if Figure 1bAs shown, the spiral cut portion 14 horizontally penetrates the vertical central axis of the main body 10 and forms a certain length along the length direction of the vertical central axis of the main body 10, so as to be formed in the form of bisecting a cross section at right angles to the vertical central axis. The spiral cut portion 14 can be selectively formed in a clockwise direction or a counterclockwise direction. In addition, the spiral cut portion 14 can also be selectively formed in the threaded portion 12. In addition, the main body 10 can be extended to the lower part of the threaded portion 12, and a spiral cut portion 16 can be additionally formed in the extended portion of the main body 10.

[0073] In addition, it is preferable that the cutting direction of the spiral cut portion formed between the head and the thread portion of the fixing screw is formed in the same direction as the thread portion of the fixing screw.

[0074] Reference Figure 2a and Figure 2b In the lower part of the base of the dental implant base 200 of the present invention, which is inserted into the axial hole of the fixed body, a plurality of slot cut parts 240, 240' are formed along the circumference. Preferably, at least one end of the lower part of the base inserted into the axial hole of the fixed body in the base part is blocked, and a plurality of slot cut parts 240, 240' are formed along the circumference at a certain interval from the outer diameter to the inner diameter. Preferably, the slot cut parts 240, 240' can be formed in the shape of an oblique line, a vertical line or a horizontal line.

[0075] As the fixing screw is tightened, the slot cut portions 240, 240' cause the multiple independent surfaces formed along the circumference to deform within the elastic range through the oblique slot cut portions, and fit tightly against the inclined surface of the inner side surface of the axial hole of the fixing body. At this time, the elastic rebound force generated by the surfaces that are deformed and fit tightly within the elastic range generates a force that pushes the base upward, resulting in a force that continuously pushes upward the head of the fixing screw that contacts the anti-movement step D below the fixing screw of the base. As a result, the upper surface of the fixing screw thread is tightly attached to the lower surface of the thread formed on the inner side surface of the axial hole of the fixing body, thereby preventing the fixing screw from loosening.

[0076] In addition, the multiple independent surfaces formed along the circumference continuously deform and recover within the limit of elastic deformation, thereby buffering the continuous biting force applied when chewing food. This action prevents cold pressure welding caused by strong contact between the base and the insertion shaft hole of the fixing body, and the base can always be easily separated from the fixing body when it is desired to do so.

[0077] Figure 3a is a diagram showing a single arrangement according to an embodiment of the present invention. Figure 1a The fixing screw and Figure 2a A cross-sectional view of the implant combined with the abutment. Figure 3b The fixing screw is shown in Figure 3aConceptual diagram of the effect on the implant abutment in the combined state.

[0078] Reference Figure 3a and Figure 3b The spiral cutout 14 formed on the main body 10 of the fixing screw 100 increases the elastic deformation force and elastic restoring force of the fixing screw itself, so that the fixing screw of the present invention has the function of more firmly fastening the base to the fixed body compared with the previous fixing screw. In other words, the fixing screw 100 of the present invention has a stronger elastic restoring force after elastic deformation while increasing the absolute length of elastic deformation by means of the spiral cutout 14, so that more fastening connection energy can be accommodated, that is, a stronger fastening connection force, and as a result, a stronger fastening connection force can be obtained than the existing fixing screw, so that problems such as loosening of the fixing screw can be prevented in advance.

[0079] The spiral cut portion 14 may be formed in at least a certain section between the upper end and the lower end of the main body 10. Preferably, the spiral cut portion 14 is formed in a portion of the main body 10 connecting the threaded portion 12 and the head 10. Figure 3a and Figure 3b In the state where the threaded portion 12 of the fixing screw 100 is meshed with the thread 3 formed on the inner side of the axial hole of the fixing body 1, if the fixing screw is tightened, the fixing screw 100 will be extended to a certain length within the elastic deformation limit due to the elastic force of the spiral cut portion 14, and the elastic restoring force of the spiral cut portion 14 is as follows. Figure 3a As indicated by the arrow in the figure, the threaded portion 12 of the fixing screw is pulled upward with great force. Figure 3b As shown, the threaded upper surface 12a of the fixing screw is strongly pressed against the threaded lower surface 3a formed in a form corresponding to the inner side surface of the axial hole of the fixing body 1, thereby ensuring a stronger fastening connection force between the engaged threads, resulting in greatly reducing the loosening phenomenon of the fixing screw.

[0080] Preferably, the spiral cut portion having a spiral shape formed between the head and the threaded portion of the fixing screw is formed in the same direction as the threaded portion of the fixing screw.

[0081] Preferably, if Figure 5 As shown, the spiral cutout 16 may also be formed in a spiral shape at the lower part of the threaded portion 12 formed on the main body 10. In this case, even after the end of the fixing screw 100 contacts the bottom surface of the shaft hole of the fixed body, if the fixing screw is tightened strongly, the bottom surface of the shaft hole of the fixed body and the bottom surface of the fixing screw contact and squeeze the spiral cutout at the lower part of the threaded portion, thereby generating an elastic restoring force, and this elastic restoring force plays a role in strongly pushing the threaded portion of the fixing screw upward. Therefore, Figure 3bSimilarly, the threaded upper surface 12a of the fixing screw rod is strongly pressed against the threaded lower surface 3a formed in a manner corresponding to the inner side surface of the axial hole of the fixing body 1, thereby ensuring a more secure fastening connection force, and as a result, the loosening phenomenon of the fixing screw rod can be greatly reduced. Preferably, the fixing screw rod of the present invention is made of a metal with excellent elasticity such as Ni-Ti alloy.

[0082] More preferably, the head 20 of the fixing screw 10 is as Figure 1a As shown, a screw loosening prevention projection 26 is also provided at a certain position of the outer peripheral surface, for example, Figure 1a The fixing screw 10 will Figure 2a When the implant base 200 is fastened to the fixed body, the screw loosening prevention protrusion 26 is meshed with and inserted into the spiral or oblique cut portion 230 formed on the upper part of the base, thereby additionally preventing the loosening of the fixing screw.

[0083] As described above, if the fixing screw 100 according to the present invention is tightened only within the elastic deformation limit, the spiral cut portions 14 and 16 can ensure a greater elastic force and elastic restoring force than the existing fixing screws. Therefore, the thread upper surface 12a of the fixing screw can be kept tightly in contact with and pressurized by the force of the thread lower surface 3a formed on the inner side surface of the axial hole of the fixing body. The resulting advantage is that the tightening force for tightening the base 15 to the fixing body 1 will not decrease even after a long time.

[0084] Reference Figure 1a and Figure 5 The spiral cutouts 14 and 16 formed in the main body 10 of the fixing screw can perform a stress buffering function by their own structural characteristics and elastic restoring force. In other words, even if lateral pressure in various directions is applied to the abutment by bite force or the like, and a force is generated to push the fixing screw laterally or lift the head of the fixing screw upward, the spiral cutout structure itself can buffer such force, and as a result, the stress applied from the side or above will not accumulate on the fixing screw itself, and thus the possibility of the fixing screw breaking is significantly reduced.

[0085] In addition, the elastic recovery effect of the spiral cut portion of the present invention can solve the previous problem of the internal type in which the lower part of the base is inserted and fastened to the inside of the shaft hole of the fixing body. In other words, as mentioned above, even after the fixing screw is fastened with a strong fastening force at the beginning, the base may sink downward over time. Due to this sinking phenomenon, even if the base moves to a position lower than the initial fastening position, the elastic recovery effect of the spiral cut portion also pulls the head of the upper end of the fixing screw downward, thereby having the function of maintaining the strong fastening force unchanged.

[0086] On the other hand, when the fixing screw is broken due to various reasons, the helical cut portion is also broken at a relatively weak point (week point), and in this case, Figure 1b As shown in the figure, the spiral cut portion that passes through the vertical center axis in the cross section is exposed in a straight line. Therefore, if a flat-blade screwdriver is inserted into the straight cut portion and rotated, the broken pieces of the fixing screw remaining on the inner surface of the shaft hole of the fixing body can be easily removed.

[0087] Figure 6 is a perspective view of a fixing screw according to another embodiment of the present invention. Figure 6 A spiral cut portion in a spiral shape is formed at the lower part of the threaded portion of the fixing screw of the present invention, a straight-line, cross-shaped or polygonal protrusion is formed on the bottom surface of the lowest end of the fixing screw, and a corresponding groove is formed on the lowest end surface of the shaft hole of the fixed body, so that the tightening connection rotation position of the fixing screw can be specified, and the function of preventing the fixing screw from loosening can also be additionally performed.

[0088] In other words, when the fixing screw is tightened, the protrusion on the bottom surface of the lower end of the fixing screw contacts the upper surface before the lower end surface of the corresponding groove formed in the lower end surface of the fixed body axial hole, and when the fixing screw continues to be tightened in this state, the spiral cut portion of the spiral shape at the lower part of the threaded portion of the fixing screw is squeezed and rotated at the same time, and the protrusion on the bottom surface of the lower end of the fixing screw is at a position consistent with the corresponding groove formed at the lower end surface of the fixed body axial hole. Due to the elastic restoring force of the spiral cut portion at the lower part of the threaded portion of the fixing screw, the protrusion on the bottom surface of the lower end of the fixing screw is combined with the groove on the lower end surface of the fixed body axial hole. In order to release this combination, a horizontal rotational force of more than a certain level must be directly applied to the fixing screw, thereby performing the function of preventing loosening, so that the daily bite force cannot cause the fixing screw to loosen.

[0089] Figure 8 FIG. 4 is a cross-sectional view of a modified embodiment of a base according to another embodiment of the present invention in which the inclination of the outer side surface of the base changes. Figure 8, between the upper point A [preferably, the upper 1.5 mm point] of the maximum diameter portion of the abutment where the edge of the prosthesis is located and the position B directly below the prosthesis fastening protrusion 210', the inclination change of the outer side surface of the abutment is realized at least twice. In other words, the outer side surface of the abutment can be formed into a first inclined outer side surface L1, a first vertical outer side surface L2, a second inclined outer side surface L3 and a second vertical outer side surface L4 in sequence from the upper point A of the maximum diameter portion of the abutment in the upper direction. As described above, the outer side surface of the abutment is configured to have at least two or more inclination changes, so that the horizontal thickness of the prosthesis fastening protrusion on the upper part of the abutment can be further ensured, resulting in that when the prosthesis is fastened to the prosthesis fastening protrusion on the upper part of the abutment, the bonding strength can be reinforced or even increased. For example, when the same inclination angle is formed from the upper point A of the maximum diameter part of the abutment to the lower end of the prosthesis fastening protrusion, the horizontal thickness of the prosthesis fastening protrusion on the upper part of the abutment is too thin, and the prosthesis cannot be firmly combined or even supported when fastening the prosthesis later, which may cause problems such as shaking or damage of the prosthesis.

[0090] Fig. 9 FIG. 2 is a perspective view of a modified embodiment of a prosthesis fastening protrusion according to another embodiment of the present invention. Fig. 9 The prosthesis fastening protrusion 210' may be additionally formed with a prosthesis fastening position recess 210a' that is recessed inward to identify the fastening position of the prosthesis when the prosthesis is installed to prevent the prosthesis from rotating. In other words, the prosthesis fastening position recess 210a' not only allows the operator to identify the accurate fastening position of the prosthesis when performing a prosthesis operation, but also prevents the prosthesis from rotating due to the force applied to the prosthesis when the prosthesis operation is completed.

[0091] Fig.10 FIG. 2 is a cross-sectional view of a modified embodiment of the upper portion of a base according to another embodiment of the present invention. Fig.10 The inclination of the outer side surface of a certain interval directly below the prosthesis fastening protrusion is formed with a smaller inclination than the inclination of the outer side surface of the lower third of the interval between the maximum diameter portion of the base and the upper end of the base where the prosthesis edge is located, and depending on the circumstances, a vertical interval with a zero inclination that maintains the same diameter may also be formed in the certain interval. When the prosthesis is repeatedly assembled and disassembled to the prosthesis fastening protrusion of the base, the problem of the sharp protruding protrusion part (represented by a circle) on the inside of the prosthesis being worn or broken may arise. Therefore, an inclined interval with a small inclination or a vertical interval with a zero inclination is formed in a certain interval from the part directly below the prosthesis fastening protrusion to the lower side, thereby enhancing the durability of the prosthesis itself corresponding to and combined with the part directly below the fastening protrusion of the base.

[0092] Fig.112 is a cross-sectional view of an implant base according to another embodiment of the present invention. Fig.11 The through hole that passes through from the upper end surface to the lower end surface of the base can be configured such that the inner diameter D1 of the upper part remains the same in a certain interval, and then has a larger inner diameter D2 below it. According to the through hole structure as described above, by increasing the thickness of the fastening connection part on the upper side of the base where the prosthesis fastening protrusion 220' is located, the bonding strength when the prosthesis is fastened can be further enhanced. Preferably, the inner diameter D3 of the lower part of the through hole can be configured to be smaller than the inner diameter D1 of the upper part.

[0093] Fig.12 is a cross-sectional view of a deformed embodiment of a prosthesis fastening projection according to yet another embodiment of the present invention, Fig.13 It is used to explain the Fig.12 Reference diagram of the effect that can be obtained during surgery on the base of the modified embodiment shown in FIG. Fig.12 The prosthesis fastening projection is configured to gradually increase its outer diameter from its upper end toward the lower side, and as a result, from the vertical cross section of the prosthesis fastening projection, it is configured to be formed in an asymmetric manner up and down with the maximum ridge point of the prosthesis fastening projection as a reference, and a portion of the outer side surface 220c' of the prosthesis fastening projection has a certain angle of inclination. For example, when a portion of the outer side surface 220c' of the prosthesis fastening projection is formed into an inclined shape, the upper end of the inclined outer side surface 220c' is easier to insert and enter the corresponding prosthesis coupling hole, especially as Fig.13 As shown, the implantation angles of adjacent abutments are too large. Even in the case where the prosthesis is difficult to fasten due to interference between adjacent prostheses, the upper end of the outer side surface 220c' of the prosthesis fastening protrusion can be inserted into the prosthesis combining hole with less resistance. After insertion, when the prosthesis is pressurized toward the abutment, the resistance is reduced as the protruding fastening connection portion of the prosthesis having the incision on the inner side is deformed in the inner direction. At the same time, the prosthesis slides along the inclined outer side surface 220c' of the protruding fastening connection portion of the prosthesis, thereby allowing relatively easy entry.

[0094] In addition, preferably, when the prosthesis is fixed to the abutment of the present invention, an elastic polymer material such as medical silicone is used to fill the space between the abutment and the prosthesis, thereby preventing foreign matter from entering and further enhancing the elasticity of the abutment.

[0095] Fig.15 (a) is a stereoscopic view of an implant base according to another embodiment of the present invention, Fig.15 (b) Looking down from above Fig.15 (a) Plan view. Fig.16 (a) shows the beginning of the combination of prosthesis X Fig.15 (a) is a cross-sectional view of the upper portion of the implant abutment. Fig.16 (b) shows the Fig.16 (a) The cross section taken along the BB and CC lines. Fig.17 (a) shows the prosthesis X being fastened to Fig.15 (a) is a cross-sectional view of a hypothetical stage before the upper portion of the implant abutment is shown, Fig.17 (b) shows the Fig.17 A cross section cut along line AA in (a) is shown to show the site where interference (or obstruction) occurs when the prosthesis is combined.

[0096] According to another embodiment of the present invention, a dental implant base 400 is formed so that the outer diameter of the upper end portion of the base for mounting the prosthesis is larger than the outer diameter of the portion directly below it, and is constructed to include a prosthesis fastening connection protrusion 410 protruding outward and a cutting portion 420 that divides the upper portion of the base into multiple slices.

[0097] Reference Fig.15 (a) and Fig.16 (a) The prosthesis fastening protrusion 410 of the base 400 is inserted into the coupling hole of the prosthesis X, thereby engaging with the fastening groove portion X1 of the coupling hole and fastening and connecting. Fig.16 (b) Fig.16 (a) The diameter HD of the bonding hole in the BB line cross section B Larger than the diameter HD of the bonding hole in the CC line section C The prosthesis fastening protrusion 410 of the base 400 gradually deforms toward the incision portion while passing between the BB line and the CC line. Fig.17 As shown in (a), when the prosthesis fastening protrusion 410 of the base 400 reaches the CC line, as shown in Fig.17 As shown in (b), the outer diameters of the upper and lower end portions 412a and 412b of the prosthesis fastening protrusion 410 are larger than the diameter HD of the coupling hole in the CC line cross section. C In other words, when the prosthesis is coupled to the base, interference occurs between the upper and lower end portions 412a, 412b of the prosthesis fastening projection 410 and the coupling hole in the CC line section and cannot enter. Therefore, when actually inserted and coupled, the prosthesis fastening projection 410 of the base 400 cannot reach the CC line, resulting in that the prosthesis fastening projection 410 of the base 400 cannot be engaged with and fastened to the fastening groove portion X1 of the prosthesis.

[0098] In connection with this, Fig.18 (a) is to remove Fig.17 (b) is a plan view of a modified embodiment of a prosthesis fastening projection with additional deletion processing to eliminate the interference portion shown in FIG. Fig.18 (b) shows that when Fig.18 (a) The prosthesis fastening projection is inserted into Fig.17 The corresponding position of (a) is the cross section cut along the CC line.

[0099] In other words, only by removing Fig.17 (b) The interference portion, i.e., the upper and lower end portions 412a and 412b of the prosthesis fastening protrusion 410, is the prosthesis fastening protrusion of the base station that can pass through the CC line section. Fig.18 As shown in (a), the width of the cut section is enlarged ( Fig.18 (a) upper side view) or horizontally delete the processing of the interference part. When the structural change is applied to the prosthesis fastening protrusion 410 in this way, such as Fig.18 As shown in (b), the prosthesis fastening protrusions 410', 410" can pass through the CC line section of the coupling hole without interference.

[0100] Fig.19 (a) shows that the prosthesis X is fully fastened to Fig.18 (a) is a cross-sectional view showing the state of the upper portion of the implant abutment, Fig.19 (b) shows the Fig.19 (a) Cross section cut along line DD.

[0101] In other words, after the prosthesis fastening protrusions 410', 410" with the structural changes described above pass through the CC line section, as shown in FIG. Fig.19 (a), it is engaged with the fastening groove of the prosthesis and fastened. In this case, Fig.19 As shown in (b), the prosthesis fastening protrusions 410', 410" elastically recover to engage with the prosthesis fastening grooves.

[0102] However, in this case, the cut width W' is much larger than Fig.15 The incision width W of (a) may require the deletion of the upper and lower end portions of the prosthesis protruding fastening connection portion, which has the limitation of reducing the structural rigidity of the prosthesis fastening connection protrusion itself combined with the prosthesis.

[0103] Fig. 20 (a) is a stereoscopic view of an implant base according to another embodiment of the present invention, Fig. 20 (b) Looking down from above Fig. 20 (a) Plan view.

[0104] Reference Fig. 20(a) According to another embodiment of the present invention, a dental implant base 500 is formed so that the outer diameter of the upper end portion of the base for mounting the prosthesis is larger than the outer diameter of the portion directly below the base, and is constructed to include a prosthesis fastening connection protrusion 510 protruding outward and a cutting portion 520 that divides the upper portion of the base into a plurality of slices.

[0105] Reference Fig. 20 (b) When the prosthesis fastening projection 510 is viewed from a horizontal cross-sectional view, the distance value from the vertical center axis C of the base to the outside of the fastening projection decreases continuously as it approaches the incision 520, particularly in the central portion F of the outer side surface of the slice divided by the incision 520, where the distance value has the largest form (hereinafter referred to as the "characteristic form").

[0106] For example, Fig. 20 As shown in (b), when looking down from directly above, each prosthesis fastening protrusion 510 divided into a plurality of slices by the cut portion 520 may have a characteristic shape consisting of a crescent shape.

[0107] Fig.21 (a) shows the beginning of the combination of prosthesis X Fig. 20 (a) is a cross-sectional view of the upper portion of the implant abutment. Fig.21 (b) shows the Fig.21 (a) The cross section taken along the BB and CC lines. Fig. 22 (a) shows the prosthesis X fastened to Fig. 20 (a) is a cross-sectional view of a stage before the upper portion of the implant abutment is shown, Fig. 22 (b) shows the Fig. 22 (a) Cross section cut along line CC.

[0108] Reference Fig.21 (a) A connecting hole with a predetermined length and a circular cross section is formed in the prosthesis X, and a fastening groove portion X1 corresponding to the prosthesis fastening protrusion 510 is formed in the upper portion of the connecting hole. When the prosthesis X is inserted and connected to the upper portion of the dental implant base 500, as shown in FIG. Fig. 22 As shown in (a), when the prosthesis fastening connection protrusion 510 reaches the CC line section of the combination hole, as shown in Fig. 22As shown in (b), the prosthesis fastening connection protrusion divided into a plurality of slices is deformed toward the cutout portion 520. As a result, the entire deformed prosthesis fastening connection protrusion is formed into a shape corresponding to the prosthesis coupling hole. In this case, there is no interference between the prosthesis fastening connection protrusion and the prosthesis coupling hole, so unlike the previous embodiment, there is no need to make structural changes such as deleting the interference portion or increasing the width of the base cutout portion. As a result, the advantage is that the coupling force with the prosthesis is ensured, and the structural rigidity of the prosthesis fastening connection protrusion itself that supports the occlusal force applied to the prosthesis is increased.

[0109] Fig.23 (a) shows that the prosthesis X is fully fastened to Fig. 20 (a) is a cross-sectional view showing the state of the upper portion of the implant abutment, Fig.23 (b) shows the Fig.23 (a) Cross section cut along line DD.

[0110] Reference Fig.23 (a), after the prosthesis fastening protrusion 510 passes through the CC line section, as shown in Fig.23 (a), it is engaged with the fastening groove of the prosthesis and fastened. In this case, Fig.23 As shown in (b), the prosthesis fastening protrusion 510 elastically recovers to engage with the fastening groove of the prosthesis. In particular, the prosthesis fastening protrusion 510 formed by protruding outward at different values ​​according to the position on the outer side surface of the slices formed by the cut portion formed on the upper part of the base elastically recovers after deformation, and is inserted into the combination hole of the prosthesis, and engages with the corresponding form of the fastening groove of the prosthesis and is fastened, thereby preventing the prosthesis from rotating and specifying the fastening position.

[0111] In other words, Fig.23 As shown in (b), when the prosthesis fastening protrusion 510 elastically recovers and meshes with the prosthesis fastening groove and is fastened, the entire prosthesis fastening protrusion 510 that has elastically recovered has, for example, an elliptical shape. Compared with the existing structure composed of a circular shape, it is easier to specify the fastening position during fastening, and after fastening, it can also achieve the function of preventing the prosthesis from rotating.

[0112] Although the present invention has been described in detail above with reference to the accompanying drawings for specific embodiments, the present invention is not limited to the above specific structures. Anyone with general knowledge in the art can make various modifications or changes to the present invention without departing from the technical concept and scope of rights of the present invention as recorded in the patent claims. However, it is intended to indicate in advance that such simple design material modifications or deformation structures are obviously within the scope of rights of the present invention.

Claims

1. A dental implant base, characterized in that: include: a prosthesis fastening projection which projects outward and has an upper end portion on an upper portion of an abutment for mounting a prosthesis formed to have a longer outer diameter than a portion directly below the prosthesis; and The cutting part divides the upper part of the base into a plurality of slices. When the prosthesis fastening projection is viewed in a horizontal cross-sectional view, the distance value from the vertical center axis (C) of the abutment to the outer side surface of the fastening projection has a different form depending on the position.

2. The dental implant abutment according to claim 1, characterized in that: The cutout portion is formed by continuously connecting a certain section from the upper end surface of the base toward the lower side, and the certain section is formed in a spiral shape or an oblique line shape.

3. The dental implant abutment according to claim 1, characterized in that: The incision portion has a lower incision portion width formed smaller than the incision portion width at the upper end portion.

4. The dental implant abutment according to claim 1, characterized in that: The spiral or oblique cut portion extends from the upper portion to the lower portion of the cut section thereof in a cutting direction that is the same as the rotation direction of the fixing screw for fastening the base and the fixing body.

5. The dental implant abutment according to claim 1, characterized in that: The base is fastened to the fixed body by means of a fixing screw, and the fixing screw includes: a threaded portion, which has a specified vertical length and is formed with a thread on the outer peripheral surface; a head, which is formed on the upper side of the threaded portion and is formed with a coupling groove for inserting a screwdriver on its upper end surface; and a main body, which connects the threaded portion and the head and has a spiral cut portion with a spiral shape of a certain length formed along the length direction, the spiral cut portion horizontally penetrates the vertical central axis of the main body and forms a certain length along the length direction of the vertical central axis of the main body, thereby being formed in the form of bisecting a cross section at a right angle to the vertical central axis.

6. The dental implant abutment according to claim 1, characterized in that: In the base part, at least one end of the base lower portion inserted into the fixing body axial hole is blocked, and a plurality of slot cutout portions penetrating from the outer diameter to the inner diameter are formed at regular intervals along the circumference.

7. The dental implant abutment according to claim 6, characterized in that: The slot cutout is formed by an oblique line, a vertical line or a horizontal line.

8. The dental implant abutment according to claim 5, characterized in that: The head of the fixing screw is also provided with a screw loosening prevention protrusion at a certain position of the outer circumference. When the fixing screw is tightened, the screw loosening prevention protrusion is inserted and combined with the spiral or oblique cut portion formed on the upper part of the base, thereby preventing the fixing screw from loosening.

9. The dental implant abutment according to claim 2, characterized in that: The planar portion may be formed as an inclined surface.

10. The dental implant abutment according to claim 1, characterized in that: The inclination of the outer side surface of the abutment changes at least twice between the upper position of the maximum diameter portion (A) of the abutment where the edge of the prosthesis is located and the position directly below the protrusion of the prosthesis fastening connection.

11. The dental implant abutment according to claim 1, characterized in that: The prosthesis fastening projection is additionally provided with a prosthesis fastening position recess that is recessed inward, so that when the prosthesis is installed, the fastening position of the prosthesis is identified and rotation of the prosthesis is prevented.

12. The dental implant abutment according to claim 1, characterized in that: A certain section directly below the prosthesis fastening projection is formed with an inclination smaller than the inclination of the outer side surface of the lower third of the section between the maximum diameter portion of the abutment where the prosthesis edge is located and the upper end of the abutment, or has zero inclination.

13. The dental implant abutment according to claim 1, characterized in that: The through hole penetrating from the upper end surface to the lower end surface of the base is configured to have a uniform inner diameter on the upper side in a certain section and then have a larger inner diameter on the lower side.

14. The dental implant abutment according to claim 1, characterized in that: When viewed from a vertical section of the prosthesis fastening protrusion, the prosthesis fastening protrusion is formed in an asymmetric manner (220c') up and down based on the maximum protrusion point of the prosthesis fastening protrusion.

15. The dental implant abutment according to claim 1, characterized in that: When the prosthesis fastening protrusion is viewed from a horizontal cross-sectional view, the distance value from the vertical center axis (C) of the base to the outer side surface of the fastening protrusion decreases continuously as it approaches the incision portion, and the distance value is the largest in the central portion (F) of the outer side surface of the slice separated by the incision portion.

16. The dental implant abutment according to claim 1, characterized in that: A circular coupling hole formed in the cross-section of the prosthesis is formed with a specified length, and a fastening connection groove portion corresponding to the prosthesis fastening connection protrusion is formed at the upper part of the coupling hole. When the prosthesis is inserted and coupled to the upper part of the base for the dental implant, the prosthesis fastening connection protrusion divided into a plurality of slices is deformed toward the cut portion side, resulting in the entire deformed protrusion of the prosthesis forming a shape corresponding to the coupling hole of the prosthesis.

17. The dental implant abutment according to claim 16, wherein: The prosthesis fastening connection protrusion formed from the central part of the inner side surface of a plurality of slices cut from the incision portion formed on the upper part of the base and protruding outward at different values ​​according to the position elastically recovers after deformation, meshes with and fastens with the corresponding form of the prosthesis fastening connection groove portion, thereby preventing the prosthesis from rotating and specifying the fastening connection position.

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