KR20230161113A - Detachable dental implant system - Google Patents

Abstract

The removable dental implant system includes an implant body that is installed in the alveolar bone and an abutment section that is located on top of the installation section and provides a cone-shaped external slope and an inverted cone-shaped internal slope, and an implant body between the abutment unit and the prosthesis. It includes a crown medium that is interposed in and itself fixes the prosthesis to the abutment portion, and the crown medium has a first close contact inclined surface that is in close contact with the external inclined surface and makes surface contact, and a second close contact inclined surface that is in close contact with the internal inclined surface and makes surface contact. Provided to include a receiving space coupled to the abutment portion, the surface contact between the external inclined surface and the first close contact inclined surface and the surface contact between the internal inclined surface and the second close contact inclined surface are resistance that prevents the rotation of the crown medium with respect to the abutment. Torque can be formed.

Description

Detachable dental implant system {DETACHABLE DENTAL IMPLANT SYSTEM}

The present invention relates to a dental implant system, and more specifically, a prosthesis can be easily mounted or removed without forming a screw hole in a prosthesis such as an artificial tooth, and the prosthesis can be damaged by various impact events applied to the prosthesis. It relates to a removable dental implant system that can prevent it from falling off from an abutment.

A conventional dental implant system may include an installation part installed in the alveolar bone, an abutment fixed to the installation part, and a prosthesis bonded to the abutment. The prosthesis is an artificial tooth that is integrally coupled to the abutment by an adhesive such as dental cement, and a screw hole is formed in the prosthesis so that the prosthesis can be fixed to or separated from the implantation portion along with the abutment. Korean Patent No. 10-0537219 discloses a method of joining an abutment and a prosthesis with cement while the abutment is positioned in the insertion portion, and using a screw hole formed in the prosthesis.

In a conventional dental implant system, for example, a problem may occur in which artificial teeth, abutments, implantation parts, etc. must be repaired or replaced at a dental site due to fracture of a connecting screw or various other reasons. To solve this problem, the work of re-drilling the screw hole to connect the connecting screw to the artificial tooth, loosening or removing the connecting screw, replacing the artificial tooth, abutment, etc., refastening the connecting screw, and removing the drilled hole. It may be necessary to refill the area with resin, etc.

In this regard, Korean Patent No. 10-2323729 discloses a dental implant system. The dental implant system has a screw hole formed perpendicular to the cap, and a C-ring-shaped separation prevention part and a ring-shaped sealing part are provided on the outer surface of the abutment to prevent complete adhesion between the cap and the abutment. can do.

In addition, since the separation prevention part and the sealing part are formed along the circumference of the outer surface of the abutment and occupy a relatively large area, sufficient surface contact is formed when the abutment is formed in a small size of 5 mm or less. I can't do it.

Unless the breakaway prevention part is made without error, it is impossible to form surface contact between the abutment and the cap. For example, if the separation prevention part is slightly enlarged or twisted, a gap is formed between the abutment and the cap, and if the separation prevention part is slightly small, the bond between the abutment and the cap may be shaken.

The present invention allows the abutment part and the prosthesis to be joined only by surface contact using external and internal inclined surfaces without forming a screw hole in the prosthesis, and the prosthesis can be easily separated and repaired from the structure of the abutment part, not the installation part. Alternatively, a removable dental implant system that can be replaced is provided.

The present invention provides a removable dental implant system that can maximize bonding strength in bonding using surface contact.

The present invention provides a removable dental implant system that can prevent momentary lifting of the prosthesis in addition to the bonding force caused by surface contact.

The present invention is a removable dental implant that allows easy separation and installation of the prosthesis even when the installed state of the installation part is tilted or two or more installation parts are connected with a bridge, even if the separate prosthesis does not move in the direction consistent with the axial direction of the abutment part. Provides a system.

According to an exemplary embodiment of the present invention, a removable dental implant system can be provided using an implant body and a crown media, and the implant body is located on an installation portion that is installed in the alveolar bone and an upper portion of the installation portion, An external inclined surface in the shape of a cone and an internal inclined surface in the shape of an inverted cone can be provided. The crown medium is interposed between the abutment portion and the prosthesis and can itself fix the prosthesis to the abutment portion. The crown medium includes a receiving space coupled to the abutment portion by providing a first close contact inclined surface in close contact with the external inclined surface and a second close contact inclined surface in close contact with the internal inclined surface, and the first close contact with the external inclined surface. The surface contact between the inclined surfaces and the surface contact between the internal inclined surface and the second contact inclined surface may form a resistance torque that prevents rotation of the crown medium relative to the abutment.

The crown medium can be joined by surface contact on the outside and inside of the abutment part, and the external and internal slopes can prevent the crown medium from peeling off at different heights.

In this embodiment, surface contact may mean a state of full contact, and as in the dental implant system of Korean Patent No. 10-2323729, a C-ring-shaped separation prevention portion and ring are formed on the outer surface of the abutment portion. It can be said that this is different from the one in which a shaped sealing part is provided to prevent complete contact between the cap and the abutment part.

Therefore, in this embodiment, the external inclined surface and the first close contact inclined surface can be maintained in full contact without inclusions such as C-rings or packing.

The crown medium and the abutment portion can be bonded to each other without cement or adhesive, and the prosthesis can be detachably coupled to the abutment portion without forming a screw hole in the prosthesis.

The insertion part and the abutment part can be formed integrally to form one implant body.

The external inclined surface may be formed in the shape of a cone, where the cone shape can be understood as a concept including the shape of a truncated cone or truncated pyramid. Likewise, the internal slope may also be formed in the shape of an inverted cone, such as a truncated cone or truncated pyramid. The external slope and the internal slope may be formed the same, similar, or different.

In this embodiment, the external slope and the internal slope may be formed at different heights, and the lower end of the internal slope may be located higher than the lower end of the external slope. Since the engaging position between the inner inclined surface and the second close contact inclined surface is different from the engaging position between the external inclined surface and the first close contact inclined surface, mutual separation can be resisted.

For example, the height (h1) from the top of the abutment portion to the bottom of the internal slope may be shorter than the height (h2) from the bottom of the internal slope to the bottom of the external slope.

The angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the abutment portion can be set to 4 degrees to 15 degrees. The angles (θ ₁ , θ ₂ ) of the inclined planes are opposite in direction, but can be understood as positive numbers. If the angle is less than 4 degrees, the difficulty of the system becomes excessive because the prosthesis and abutment must be combined almost only in the axial direction. It increases rapidly, and if the angle is greater than 15 degrees, the bonding force between the prosthesis and the abutment portion is weakened, and the prosthesis may easily be separated from the abutment portion even with a small external force. For reference, the angle of the inclined plane in this specification is based on the cross section passing through the central axis of the abutment portion, and can be understood as an acute angle with respect to the central axis regardless of the top or bottom.

Additionally, the angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the abutment portion may be formed to have a deviation of approximately 3 degrees or less.

To form an internal inclined surface, a ring-shaped protrusion can be formed on the ceiling of the space for receiving the crown medium, and the outer surface of the ring-shaped protrusion can be defined as a second close contact inclined surface to form surface contact with the internal inclined surface.

In addition, a distance fixing portion extending downward from the ceiling of the receiving space and entering the inner space of the abutment portion may be formed in the center of the ring-shaped protrusion. The end of the distance fixing part can be fixed in the internal space of the abutment part, and the coupling distance between the crown medium and the abutment part can be limited to prevent lifting between the inclined surfaces forming surface contact.

The distance fixing unit may be provided in the shape of a pillar with a protrusion or groove formed at an end, and a groove or protrusion that engages the protrusion or groove of the distance fixing unit may be formed in the internal space.

Additionally, the distance fixing unit may be provided in a cylindrical shape with an elastic leg formed at an end, a protrusion may be formed on an end of the elastic leg, and a groove that engages the protrusion of the elastic leg may be formed on the inner wall of the internal space.

A female thread may be formed at the bottom of the internal space below the groove that engages the elastic leg, and when temporarily fixing an impression coping, etc. in addition to the abutment part, the parts that fit the female thread are fixed without having to form distance fixing units one by one. You can do it.

A sealing inclined surface formed with an inclination angle (θ ₃ ) smaller than the angle (θ ₁ ) of the external inclined surface may be further formed at the lower part of the external inclined surface.

The removable dental implant system of the present invention does not permanently bond the prosthesis and the abutment portion, and does not use screws to join the prosthesis and the abutment portion, so there is no need to form a screw hole in the prosthesis.

The removable dental implant system of the present invention must be able to easily separate the prosthesis from the abutment portion and prevent the prosthesis from being separated due to an unexpected event. For this purpose, the three-dimensional surface contact of the present invention can be bonded to the inside and outside of the abutment part, and full contact can be maintained without using a C-ring or the like.

In some cases, it is not possible to completely prevent the prosthesis from falling off through surface contact alone, so in the present invention, by adding a distance fixing part, it is possible to prevent the crown medium and the prosthesis from being easily lifted from the abutment part. Distance limits between the and crown media can be configured.

Even in forming the distance fixing part, it is possible to prevent the distance fixing part from being affected by external forces by locating it in the internal space rather than the outer surface of the abutment part, and by combining the distance fixing part with the crown medium or forming it as one piece, it is possible to prevent the distance fixing part from being affected by the crown medium. It may be possible to produce small sizes such as height and width of about 5 mm. Because the crown medium can be manufactured in a small size, it can also be applied to implants for small teeth such as front teeth.

The removable dental implant system of the present invention can form a crown medium in a small size due to the internal and external slopes and the distance fixing part, and can improve the bonding force using surface contact as much as possible due to the distance limitation by the distance fixing part. Even if the crown medium and abutment part are made relatively short, it can withstand lateral pressure well, and there is no need to remove the medium.

In addition, since the distance fixing part is rooted and fixed in the crown medium, when the crown medium and prosthesis approach the abutment part, the end of the distance fixing part is partially deformed along the internal space or internal slope of the abutment part and is axial. Access from inclined directions other than that direction may also be possible.

The present invention provides a removable dental implant system that can prevent momentary lifting of the prosthesis in addition to the bonding force caused by surface contact. Even when the implanted part is tilted using an external or internal inclined surface or two or more inclined implanted parts are connected with a bridge, the prosthesis can be separated and installed even if the separate prosthesis does not move in the direction consistent with the axial direction of the abutment part. This can be easy.

1 is a diagram for explaining a removable dental implant system according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining a cross section of the detachable dental implant system of FIG. 1.
FIG. 3 is a diagram for explaining the coupling structure of the detachable dental implant system of FIG. 1.
FIG. 4 is a diagram for explaining the assembly process of the removable dental implant system of FIG. 1.
FIG. 5 is a diagram for explaining the effect of the removable dental implant system of FIG. 1.
Figure 6 is a diagram for explaining the crown medium of the removable dental implant system according to an embodiment of the present invention.
FIG. 7 is a diagram for explaining the joining process of the removable dental implant system using the crown medium of FIG. 6.
FIG. 8 is a diagram for explaining the effect of the removable dental implant system of FIG. 6.
Figure 9 is a diagram for explaining a removable dental implant system according to an embodiment of the present invention.
FIG. 10 is a diagram for explaining a cross section of the detachable dental implant system of FIG. 9.
FIG. 11 is a diagram for explaining the coupling structure of the detachable dental implant system of FIG. 9.
FIG. 12 is a diagram for explaining the assembly process of the removable dental implant system of FIG. 9.
13 to 15 are diagrams for explaining another use case of a removable dental implant system according to an embodiment of the present invention.
Figure 16 is a diagram for explaining a removable dental implant system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in this description, the same numbers refer to substantially the same elements, and under these rules, the description can be made by citing the content shown in other drawings, and content that is judged to be obvious to those skilled in the art or that is repeated can be omitted.

FIG. 1 is a diagram illustrating a removable dental implant system according to an embodiment of the present invention, FIG. 2 is a diagram illustrating a cross section of the removable dental implant system of FIG. 1, and FIG. 3 is a diagram illustrating a removable dental implant system of FIG. 1. It is a diagram for explaining the coupling structure of the dental implant system. FIG. 4 is a diagram for explaining the coupling process of the removable dental implant system of FIG. 1, and FIG. 5 illustrates the effect of the removable dental implant system of FIG. 1. This is a drawing for this purpose.

1 to 5, the removable dental implant system 100 according to an embodiment of the present invention includes an implant body 110 and a crown in which an installation portion 115 and an abutment portion 120 are integrally formed. It may include a medium 140.

The implant body 110 is a structure that is installed in the alveolar bone using the installation part 115. When the implant body 110 is installed, it is integrated with the prosthesis 20, which is an artificial tooth, through the abutment part 120 at the top. The bonded crown medium 140 may be fixed.

The implant body 110 and the crown medium 140 may be made of titanium, and the prosthesis 20 may be made of composite resin or ceramic.

In this embodiment, the abutment portion 120 may be formed on the upper portion of the implant body 110, and the insertion portion 115 may be formed on the lower portion in a screw type. Since the implant body 110 is installed in the alveolar bone, it may be affected by various variables depending on the patient's physical condition or surgical conditions, and its installed location or angle may change even during the stabilization process after installation. For example, the conditions for osseointegration of the implantation part may be changed by occlusal force.

The abutment portion 120 provides an external inclined surface 122 of a convex shape to the outside, and an internal space 130 with an open top to the inside and an internal inclined surface 132 formed at the top of the internal space 130. can be provided. There is a space corresponding to the internal space in the conventional abutment part, but in the conventional abutment part, the space is a space for the screw to pass through the prosthesis, whereas in the present embodiment, the internal space 130 is a space for the prosthesis. It can be blocked from (20), and the internal inclined surface 132, the second close contact inclined surface 152, and other binding structures can be blocked from the outside to function as a protective space that can form a stable bond.

In this embodiment, the outer inclined surface 122 and the first close inclined surface 142 are formed in the shape of a truncated cone, but in other embodiments, they may be formed in the shape of a truncated pyramid. In addition, the outer inclined surface 122 and the first close contact inclined surface 142 are maintained in close contact with each other on all sides, and unlike the prior art, they are in contact on all sides without any elements that interfere with close contact between the two inclined surfaces, such as C-rings, seals, or packing. The status quo can be maintained.

In addition, a sealing inclined surface 123 formed at an inclination angle smaller than the angle θ ₁ of the external inclined surface 122 may be further formed at the lower part of the external inclined surface 122, and the sealing inclined surface 123 is also formed on the first close contact inclined surface 142. ) A vertical surface or inclined surface corresponding to ) may be formed.

The external inclined surface 122 is inclined at an angle of about 4 to 15 degrees with respect to the central axis of the abutment portion 120, but the sealing inclined surface 123 is inclined at an angle smaller than the external inclined surface 122 or about 4 degrees or less. An inclination angle of can be formed.

Since the sealing inclined surface 123 is formed at the lower part of the external inclined surface 122, even if it is formed at an inclination angle of about 4 degrees or less, it may not interfere with the coupling between the crown medium 140 and the abutment portion 120, and external foreign substances may not be prevented. It is possible to prevent the crown medium from flowing between the crown medium 140 and the abutment portion 120. Additionally, it is possible to reduce subtle fluctuations between the crown medium 140 and the abutment portion 120.

The crown medium 140 and the abutment portion 120 can be maintained in a coupled state by the surface contact of the inclined surfaces facing the entire surface, and the contact between the precisely machined external inclined surface 122 and the first close contact inclined surface 142 is maintained. Very close surface contact can be formed through adhesion, friction, or negative pressure.

The crown medium 140 may form a receiving space 145 that is open at the bottom like a cap, and its outer surface may be bonded to the prosthesis 20. In order to strengthen the bonding with the prosthesis 20, a plurality of irregularities 146 may be formed on the outer surface of the crown medium 140.

2 and 4 , the crown medium 140 may provide a receiving space 145 capable of accommodating the upper part of the abutment portion 120. The receiving space 145 may form a first close contact inclined surface 142 that forms surface contact on the entire surface with the external inclined surface 122 of the abutment portion 120, and a ring-shaped protrusion 150 is located at the center of the ceiling of the receiving space. ) is formed, and a second close contact inclined surface 152 may be provided on its outer surface.

Referring to FIG. 4 , a state (a) before the prosthesis 20 and the crown medium 140 are coupled to the upper part of the abutment portion 120 and a state (b) after the prosthesis 20 are coupled to the upper part of the abutment portion 120 are shown.

The crown medium 140 according to this embodiment includes a ring-shaped protrusion 150 formed at the center of the ceiling of the receiving space 145, and the outer surface of the ring-shaped protrusion 150 is formed on the inner inclined surface 132 of the abutment portion 120. ) can be formed as a second close contact inclined surface 152 corresponding to.

An inverted cone-shaped internal inclined surface 132 may be formed as an inner wall of the internal space 130 of the abutment portion 120. As a result, a more stable bond can be formed through surface contact between the external inclined surface 122 and the first close contact inclined surface 142 and between the internal inclined surface 132 and the second close contact inclined surface 152.

The outer slope 122 and the inner slope 132 may be formed at different heights. For example, the lower end of the internal inclined surface 132 may be positioned higher than the lower end of the external inclined surface 122. Therefore, as shown in FIG. 5, the engaging position (B) between the inner inclined surface and the second close contact inclined surface is different from the engaging position (A) between the external inclined surface and the first close contact inclined surface, so that mutual separation can be resisted.

To express this specifically, the height (h ₁ ) from the top of the abutment portion 120 to the bottom of the internal slope can be shorter than the height (h ₂ ) from the bottom of the internal slope to the bottom of the external slope. .

When considering the angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the abutment portion, the two angles (θ ₁ and θ ₂ ) may preferably be formed to be equal, but the abutment The angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the ment portion can be formed with a deviation of approximately 3 degrees or less. ( -3 ≤ (θ ₁ -θ ₂ ) ≤ 3 )

In addition, the angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the abutment portion can both be formed in the range of about 4 degrees to 15 degrees. Here, the angles (θ ₁ , θ ₂ ) of the inclined planes have opposite directions but can be understood as positive numbers, and if the angle is less than 4 degrees, the prosthesis 20 and the abutment portion 120 are aligned almost only in the axial direction. Because it must be combined, the difficulty of the system may increase excessively, and if the angle is greater than 15 degrees, the bonding force due to surface contact between the prosthesis 20 and the abutment portion 120 is weakened, so that the prosthesis (20) is damaged even by a very small external force. ) can be easily separated from the abutment portion 120.

The surface contact between the external inclined surface 122 and the first contact inclined surface 142 as well as the surface contact between the internal inclined surface 132 and the second close contact inclined surface 152 may cause the prosthesis to be separated from the abutment portion 120 due to an unexpected event. Separation can be prevented.

As shown in Figure 5, events that may occur in the implant system may occur due to repeated chewing (a), or may also occur due to pushing or twisting between teeth (b).

Referring to (a) of FIG. 5, when an eccentric force F is applied at the top of the prosthesis 20, a torque is generated centered on the end O between the adjacent crown medium 140 and the abutment portion 120. may occur. Assuming that the event torque (R1) due to the eccentric force (F) is F*D ₁ , the resistance torque between the crown medium 140 and the abutment portion 120 at the opposite point (A) is f ₁₁ *d It can be expressed as ₁ . In addition, resistance torque may also occur at a point (B) closer to it, and this resistance torque can be expressed as f ₁₂ *d ₂

If it is assumed that there is no resistance torque between the inner slope 132 and the second close slope surface 152, peeling occurs to the extent that the resistance torque (f ₁₁ *d ₁ ) can overcome the generated event torque (F * D ₁ ). Although it will not occur, peeling may occur if the event torque (F*D ₁ ) is greater than the maximum value of the resistance torque (f ₁₁ *d ₁ ).

In addition, if momentary lifting occurs between the crown medium 140 and the abutment portion 120 due to a sudden impact or repetitive load, the prosthesis 20 may be peeled off along with the crown medium 140.

However, since the resistance force (f ₁₂ ) of point B occurs at a different distance and in a different direction, instantaneous separation between the crown medium 140 and the abutment portion 120 due to a sudden impact or repeated load is prevented. can do.

In addition, even if a continuous load is applied, the resistance torque to the event torque (F*D ₁ ) is the resistance torque due to surface contact with the inclined surface at point A (f ₁₁ *d ₁ ) and the torque due to surface contact with the inclined surface at point B. Since it is formed by the sum of resistance torques (f ₁₂ *d ₂ ), it is possible to prevent the prosthesis 20 from easily peeling off.

Looking at (b) of FIG. 5, it can be assumed that the same force F acts on the side of the prosthesis 20 rather than the top. In this case as well, the event torque (R2) caused by the eccentric force (F) can be expressed as F*D ₂ , and a relatively larger event torque (F*D ₂ ) can be applied.

In this case, torque may be generated centered on the far end (O) between the crown medium 140 and the abutment portion 120. Here again, assuming that there is no resistance torque between the internal inclined surface 132 and the second close contact inclined surface 152, peeling occurs to the extent that the resistance torque (f ₂₁ *d ₁ ) can overcome the generated event torque (F * D ₂ ). Although it will not occur, it may not be easy to overcome the event torque (F*D ₂ ) with the resistance torque (f ₂₁ *d ₁ ) because a relatively large event torque (F*D ₂ ) is applied.

However, because the resistance force (f ₁₂ ) between the internal inclined surface 132 and the second close inclined surface 152 occurs at different distances and in different directions, the crown medium 140 and the abutt may be separated by an impact or repetitive load in a specific direction. It is possible to prevent momentary lifting between the parts 120.

In addition, even if a continuous load is applied, the resistance torque for the event torque (F * D ₂ ) is the resistance torque due to surface contact with the inclined surface at point A (f ₂₁ * d ₁ ) and the torque due to surface contact with the inclined surface at point B. Since it is formed by the sum of resistance torques (f ₂₂ *d ₂ ), it is possible to prevent the prosthesis 20 from peeling off helplessly.

The stable coupling between the abutment part 120 and the crown medium 140 can be further strengthened by further forming a distance fixing part 160 in the internal space 130 of the abutment part 120.

FIG. 6 is a diagram for explaining the crown medium of the removable dental implant system according to an embodiment of the present invention, and FIG. 7 is a diagram for explaining the joining process of the removable dental implant system using the crown medium of FIG. 6. , FIG. 8 is a diagram for explaining the effect of the removable dental implant system of FIG. 7.

6 to 8, the crown medium 140' according to the present embodiment includes a distance fixing part 160 at the center of the ring-shaped protrusion 150, and the distance fixing part 160 is located in the receiving space 145. ) may extend downward from the center of the ceiling.

A ring-shaped protrusion 150 is formed around the distance fixing part 160, and the outer surface of the ring-shaped protrusion 150 is formed as a second close contact inclined surface 152 corresponding to the internal inclined surface 132 of the abutment portion 120. can be formed.

In addition to the surface contact between the outer inclined surface 122 and the first close contact inclined surface 142 and the surface contact between the inner inclined surface 132 and the second close contact inclined surface 152, the distance fixing portion 160 is connected to the abutment portion 120. ) Because the distance between the crown medium 140' is limited, the implant system can form a more stable bond.

The distance fixing part 160 may be formed integrally with or combined with the crown medium 140', and its end may have a relatively large dimension and be formed bluntly. A space in which the end of the distance fixing part 160 can be accommodated may be formed at the bottom of the internal space 130, and an elastic piece 134 capable of fixing the end of the distance fixing part 160 at the entrance of the space. This can be provided.

Figure 7 shows the process before and after the end of the distance fixing part 160 is coupled to the elastic piece 134, and the end of the distance fixing part 160 passes through the elastic piece 134 and is temporarily fixed. The outer inclined surface 122 of the butt portion 120 and the first close contact inclined surface 142 of the crown medium 140, as well as the inner inclined surface 132 and the second close contact inclined surface 152, are in close contact with each other by a fixing force other than gravity. The status quo can be maintained.

In this embodiment as well, the angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the abutment part can both be formed in a range of about 4 degrees to 15 degrees, and the central axis of the abutment part The angle of the external slope (θ ₁ ) and the angle of the internal slope (θ ₂ ) can be formed with a deviation of approximately 3 degrees or less. ( -3 ≤ (θ ₁ -θ ₂ ) ≤ 3)

In this embodiment, the internal space 130 may be used as a space for the distance fixing part 160 to enter and maintain the distance between the crown medium 140 and the abutment part 120. In fact, in this embodiment, since the distance fixing part 160 is formed in the center of the ceiling of the receiving space, it may be difficult to form a screw hole in the prosthesis 20.

8, as the coupling between the distance fixing part 160 and the elastic piece 134 is added in the internal space 130, the coupling force between the crown medium 140' and the abutment portion 120 can be further strengthened. .

Looking at (a) of FIG. 8, an eccentric force (F) acts at the top of the prosthesis 20, and a torque is generated centered on the end (O) between the adjacent crown medium (140') and the abutment portion (120). may occur.

Assuming that the event torque due to the eccentric force (F) is (F*D ₁ ), the resistance torque to the event torque (F*D ₁ ) is the resistance due to surface contact between the external inclined surface and the first close inclined surface at point A. Torque (f ₁₁ *d ₁ ), resistance torque (f ₁₂ *d ₂ ) due to surface contact between the internal inclined surface and the second close inclined surface at point B, and resistance torque (f ₁₃ Since it is formed by the sum of *d ₃ ), peeling of the prosthesis 20 can be more reliably prevented.

In particular, because the axial resistance force (f ₁₃ ) of the abutment portion 120 of the distance fixing part 160 may act greater than other resistance forces, the fixing force of the distance fixing part 160 can have a significantly large influence. there is.

As shown in (b) of FIG. 8, even if a larger event torque (F*D ₂ ) occurs, the resistance torque to the event torque (F*D ₂ ) is in surface contact with the external inclined surface and the first close inclined surface at point A. Resistance torque (f ₂₁ *d ₁ ), resistance torque (f ₂₂ *d ₂ ) due to surface contact between the internal inclined surface and the second close inclined surface at point B, and resistance torque due to the distance fixing unit 160 at point C ( Since it is formed by the sum of f ₂₃ *d ₃ ), peeling of the prosthesis 20 can be more reliably prevented.

In addition, since the direction of the resistance force (f ₁₁ ) at point A and the direction of the resistance force (f ₁₂ ) at point B are different, it may be possible to respond to various variables arising from differences in the direction of the resistance force.

FIG. 9 is a diagram illustrating a removable dental implant system according to an embodiment of the present invention, FIG. 10 is a diagram illustrating a cross section of the removable dental implant system of FIG. 9, and FIG. 11 is a diagram illustrating a removable dental implant system of FIG. 9. This is a diagram for explaining the coupling structure of the dental implant system, and FIG. 12 is a diagram for explaining the coupling process of the removable dental implant system of FIG. 9.

9 to 12, the removable dental implant system 200 according to an embodiment of the present invention includes an implant body 210 in which an installation portion 215 and an abutment portion 220 are provided integrally, and It may include a crown medium (240).

In this embodiment, the abutment portion 220 may be formed on the upper portion of the insertion portion 215, and the crown medium 240 may be coupled to the upper portion.

The abutment portion 220 may provide a cone-shaped external inclined surface 222 and an internal space 230 with an open top. The internal space 230 may be used as a space for the distance fixing unit 260 to enter and maintain the distance between the crown medium 240 and the abutment unit 220.

The crown medium 240 may form a receiving space open at the bottom like a cap, and may be bonded to the prosthesis 20 on its outer surface. 10 and 12, the crown medium 240 provides a receiving space for accommodating the upper part of the abutment portion 220, and the outer inclined surface 222 of the abutment portion 220 is provided in the receiving space. A first close contact inclined surface 242 forming surface contact is formed on the entire surface, and a distance fixing part 260 fixed to the ring-shaped protrusion 250 by interference fit can be fixed downward at the center of the ceiling of the receiving space. .

The distance fixing part 260 is formed as a whole in a cylindrical shape, and includes 2 to 6, preferably 4, branched elastic legs 262 at the bottom, so that elastic deformation is possible. A protrusion 264 may be formed on the outside at the end of the elastic leg 262, and a cylindrical groove 234 may be formed on the inner wall of the internal space 230 corresponding to the protrusion 264 of the elastic leg 262. It can be. In this embodiment, the distance fixing part 260 may be formed using Nickel Titanium (Ni-Ti), which has high elasticity.

12, the crown medium 240 according to this embodiment forms a ring-shaped protrusion 250 in the center of the ceiling, and the ring-shaped protrusion 250 fixes the distance fixing part 260 on the inside, while on the outside, A second close contact inclined surface 252 may be formed.

In response to the second close contact inclined surface 252 of the ring-shaped protrusion 250, the abutment portion 220 has an internal inclined surface 232 at an upper portion of the inner wall of the internal space 230 at an inclination angle equal to the second close contact inclined surface 252, It can be formed as an inclined plane.

A hexa-shaped groove may be formed on the inner wall of the internal space 230, and when fixing the abutment body 210, an additional hexa-shaped tool may be used.

In addition, hexa or polygonal protrusions may be further formed at the lower part of the second close contact inclined surface 252 to correspond to the hexa-shaped groove. The hex or polygonal protrusion may be bound to the hexa-shaped groove and function to accurately seat or limit rotation of the crown medium 240 and the prosthetic part.

Additionally, a female thread 236 may be formed below the circumferential groove 234 in the internal space 230. When using a healing cap or impression coping, etc., the female thread portion 236 can be used to temporarily fix the relevant part using a screw-type combination rather than a distance fixing part.

As described above, the outer inclined surface 222 and the inner inclined surface 232 of the abutment portion 220 may form surface contact with the first close contact inclined surface 242 and the second close contact inclined surface 252, respectively, The elastic legs 262 of the distance fixing unit 260 may enter along the inner wall of the internal space 230, be restored in the circumferential groove 234, and be bound to the groove 234.

The internal inclined surface 232 of the internal space 230 may be provided in an inverted cone shape and may be formed to have a predetermined inclined angle θ ₂ with respect to the central axis of the abutment portion 220 .

By forming the external inclined surface 222 and the internal inclined surface 232, it is possible to insert and remove a prosthesis connected to two or more non-parallel abutment parts in a bridge structure. For this, please refer to the drawings and descriptions of FIGS. 13 to 15.

The end of the distance fixing part 260 is formed with an elastic leg 262, so that the assembly of the prosthesis 20 and the crown medium 240 can enter the abutment part 220 in a direction slightly inclined from the axis. , the elastic leg 262 can enable stable coupling along the inner wall of the internal space 230 while being deformed within an allowable range.

The outer inclined surface 222 and the inner inclined surface 232 of the abutment part 220 are connected to the first close contact inclined surface 242 and the second close contact inclined surface 252 of the crown medium 240 by the distance fixing unit 260. A stable, close state can be maintained. These inclined surfaces are maintained in close contact on all sides, and unlike the prior art, they can be maintained in contact on all sides without elements such as C-rings, seals, or packing that interfere with the close contact between the two inclined surfaces.

In addition, a sealing inclined surface formed at an inclination angle smaller than the angle θ1 of the external inclined surface 222 may be further formed at the lower part of the external inclined surface 222, and a vertical or inclined surface corresponding to the sealing inclined surface may also be formed in the first close contact inclined surface 242. This can be formed.

The external inclined surface 222 forms an inclination of about 4 to 15 degrees with respect to the central axis of the abutment portion 220, but the sealing inclined surface has an angle smaller than the external inclined surface 222 or an inclination angle of about 4 degrees or less. can be formed.

13 to 15 are diagrams for explaining another use case of a removable dental implant system according to an embodiment of the present invention.

Referring to FIGS. 13 to 15 , a prosthesis 30 can be manufactured in which two or more implant bodies are installed and the corresponding crown mediators 240 are connected to each other by a bridge. In the drawing, two implant bodies formed with two insertion portions 215 are installed in the alveolar bone. Originally, it is preferable to be installed parallel to and perpendicular to each other, but due to some variable or intention, the insertion portions 215 are placed in opposite directions. It can be assumed that this happened.

In Figure 13, the prosthesis 30 and the crown medium 240 of the bridge are accessible through the external inclined surface 222, and the end of the elastic leg 262 of the distance fixing part 260 is an abutment part ( You can enter the interior from the end of the inner slope 232 of 220).

In Figure 14, as the prosthesis 30 approaches the abutment portion 220, the elastic leg 262 located on the inside is partially deformed like a bow and can enter along the inner inclined surface 232 and the inner wall of the inner space. .

And, as shown in Figure 15, while the crown medium 240 is in full contact with the abutment portion 220, the protrusion of the elastic leg 262 is seated in the circumferential groove 234, and the first close contact inclined surface 242 may be in close contact with the external inclined surface 222, and the second inclined surface 252 may be in close contact with the internal inclined surface 232. In this way, the inclination of the external inclined surface and the first contact inclined surface and the inclination of the internal inclined surface and the second close contact inclined surface 252 not only form surface contact over a relatively large area, but also cause the prosthesis to deviate slightly from the axial direction of the abutment portion. Even when entering at an angle, it is possible to combine the prosthesis and the abutment part.

In the present invention, the structure of the distance fixing part and the corresponding elastic piece or elastic groove can be formed in various ways. For example, the elastic structure of the distance fixing part of FIG. 11 may be applied to the elastic piece of FIG. 7.

Figure 16 is a diagram for explaining a removable dental implant system according to an embodiment of the present invention.

Referring to FIG. 16, the elastic piece 134' according to this embodiment may be formed in a cylindrical shape, a plurality of elastic legs may be formed on the top, and protrusions may be formed on the inside of the elastic legs.

The elastic piece 134' may be fixed in an interference fit manner inside the abutment portion 120, and a female thread portion 136' may be further formed below the position where the elastic piece 134' is fixed. there is. The female thread portion 136' can be used to temporarily fix a healing cap or impression coping.

The distance fixing part 160 can be inserted into the elastic piece 134' to fix the distance and form close contact between the crown medium 140' and the abutment part 120. By combining the distance fixing part 160 and the elastic piece 134', the first close contact inclined surface 142 and the second close contact inclined surface 152 of the crown medium 140' are formed on the outer inclined surface of the abutment portion 120. It is possible to form stable surface contact with (122) and the internal inclined surface (132).

For reference, in this embodiment, a protrusion is formed on the distance fixing part and a circumferential groove is formed in the inner space of the abutment part, but in some cases, a groove is formed on the distance fixing part and a protrusion is formed on the inner wall of the internal space. possible.

As described above, although the present invention has been described with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

100: implant system 110: implant body
115: Placement part 120: Abutment part
122: external slope 130: internal space
132: Internal slope 140: Crown medium
142: first close contact inclined surface 150: ring-shaped protrusion
152: second close contact slope 160: distance fixing unit

Claims (12)

In the removable dental implant system,
An implant body including an installation portion installed in the alveolar bone and an abutment portion located on an upper portion of the installation portion and providing an external inclined surface in the shape of a cone and an internal inclined surface in the shape of an inverted cone; and
It includes a crown medium that is interposed between the abutment portion and the prosthesis and itself fixes the prosthesis to the abutment portion,
The crown medium includes a receiving space coupled to the abutment portion by providing a first close contact inclined surface in close contact with the external inclined surface and a second close contact inclined surface in close contact with the internal inclined surface,
The surface contact between the outer inclined surface and the first close contact inclined surface and the surface contact between the inner inclined surface and the second close contact inclined surface form a resistance torque that prevents rotation of the crown medium with respect to the abutment. Dental implant system.
According to paragraph 1,
A removable dental implant system, characterized in that the external inclined surface and the first contact inclined surface are maintained in full contact without inclusions such as C-rings or packing.
According to paragraph 1,
A removable dental implant system, wherein the crown medium and the abutment portion are bonded to each other without cement or adhesive.
According to paragraph 1,
A removable dental implant system, characterized in that the prosthesis can be detachably coupled to the abutment portion without forming a screw hole in the prosthesis.
According to paragraph 1,
A removable dental implant system, characterized in that the installation part and the abutment part are formed integrally.
According to paragraph 1,
A removable dental implant system, wherein the external inclined surface is formed in the shape of a truncated cone or truncated pyramid.
According to paragraph 1,
A removable dental implant system, characterized in that the angle (θ ₁ ) of the external inclined surface and the angle (θ ₂ ) of the internal inclined surface with respect to the central axis of the abutment portion are 4 degrees to 15 degrees.
According to paragraph 1,
In the crown medium, a ring-shaped protrusion is formed on the ceiling of the receiving space, the second close contact inclined surface is formed on the outside of the ring-shaped protrusion, and the abutment extends downward from the ceiling of the receiving space at the center of the ring-shaped protrusion. A removable dental implant system, characterized in that it enters the inner space of the abutment part and is formed with a distance fixing part whose end is fixed to the abutment part.
According to clause 8,
The distance fixing part is provided in the shape of a pillar with a protrusion or groove formed at an end, and the inner space is formed with a groove or protrusion that engages the protrusion or groove of the distance fixing part.
According to clause 8,
The distance fixing part is provided in a cylindrical shape with an elastic leg formed at an end, a protrusion is formed on an end of the elastic leg, and a groove is formed on the inner wall of the internal space to engage with the protrusion of the elastic leg. implant system.
According to clause 10,
A removable dental implant system, characterized in that a female thread is formed in the lower part of the internal space below the groove engaging the elastic leg.
According to paragraph 1,
A detachable dental implant system, characterized in that a sealing inclined surface formed at an inclination angle smaller than the angle (θ ₁ ) of the external inclined surface is further formed at a lower portion of the external inclined surface.

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