KR102421810B1 - Detachable dental implant system - Google Patents

Abstract

A removable dental implant system includes: a fixture; an abutment providing a truncated external inclined surface and an inverted truncated internal inclined surface; and a crown medium which is interposed between the abutment and the prosthesis and fixes the prosthesis to the abutment by itself, wherein the crown medium may include an accommodation space coupled to the abutment by providing a first close inclined surface in surface contact with the external inclined surface and a second close inclined surface in surface contact with the internal inclined surface. Therefore, it is possible to maximize bonding force in bonding using the surface contact.

Description

Detachable dental implant system {DETACHABLE DENTAL IMPLANT SYSTEM}

The present invention relates to a dental implant system, and more particularly, it is possible to easily mount or detach a prosthesis without forming a screw hole in a prosthesis such as an artificial tooth. It relates to a removable dental implant system that can prevent falling off from the abutment.

A conventional dental implant system may include a fixture to be placed on the alveolar bone, an abutment fixed to the fixture, and a prosthesis joined to the abutment. The prosthesis is an artificial tooth and is integrally coupled to the abutment by an adhesive such as dental cement, and a screw hole is formed in the prosthesis to fix or separate the prosthesis together with the abutment to the fixture. Korean Patent Registration No. 10-0537219, etc., discloses a method of bonding an abutment and a prosthesis with cement in a state in which the abutment is placed on a fixture, and using a screw hole formed in the prosthesis.

In the conventional dental implant system, for example, a problem of repairing or replacing an artificial tooth, an abutment, a fixture, etc. in a dental field due to fracture of a connection screw or other various reasons may occur. To solve this, 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., re-fastening the connecting screw, drilled hole It may be necessary to backfill with resin, etc.

In this regard, Korean Patent Registration No. 10-2323729 discloses a dental implant system. In the dental implant system, a screw hole is formed perpendicular to the cap, and a C-ring-shaped separation preventing 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 preventing part and the sealing part are formed along the circumference from 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 with a dimension of 5 mm or less. I can't.

Unless the separation preventing part is made without error, the surface contact between the abutment and the cap cannot be formed. For example, if the separation preventing portion is slightly large or twisted, a gap between the abutment and the cap is formed, and if the separation preventing portion is slightly small, the coupling between the abutment and the cap may be shaken.

According to the present invention, the abutment and the prosthesis can be combined only by surface contact using the external and internal inclined surfaces without forming a screw hole in the prosthesis, and the prosthesis can be easily separated from the structure of the abutment, not the fixture, and repaired Or it provides a removable dental implant system that can be replaced.

The present invention provides a removable dental implant system capable of maximally improving the bonding force in bonding using a 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 by the surface contact.

The present invention is a removable dental prosthesis that is easy to separate and mount even when the implanted state of the fixture is tilted or when two or more fixtures are connected by a bridge, even if a separate prosthesis does not move in the direction coincident with the axial direction of the abutment We provide an implant system for

According to an exemplary embodiment of the present invention, the removable dental implant system is interposed between a fixture, an abutment providing a truncated truncated external inclined surface and an inverted truncated truncated internal inclined surface and interposed between the abutment and the prosthesis itself. and a crown medium for fixing the prosthesis to the abutment, wherein the crown medium provides a first close-contact inclined surface in surface contact with the external inclined surface and a second close-contact inclined surface in surface contact with the inner inclined surface to receive coupled with the abutment space may be included.

The crown medium may be coupled by surface contact on the outside and inside of the abutment, and the external inclined surface and the inner inclined surface may prevent peeling of the crown medium at different heights.

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

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

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

The fixture and the abutment may be coupled by screw coupling, and the coupling method may be coupled in various ways by an internal method or an external method.

The external inclined surface may be formed in a truncated cone shape, where the truncated cone shape may be understood as a concept including the shape of a truncated cone or a truncated pyramid. Similarly, the inner inclined surface may also be formed in the shape of an inverted truncated cone, and may be formed in the shape of a truncated cone or a truncated pyramid. The outer inclined surface and the inner inclined surface may be formed identically, similarly, or differently.

In this embodiment, the outer inclined surface and the inner inclined surface may be formed at different heights, and the lower end of the inner inclined surface may be positioned higher than the lower end of the outer inclined surface. 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 may be resisted.

For example, the height h ₁ from the upper end of the abutment to the lower end of the inner inclined surface may be shorter than the height h ₂ from the lower end of the inner inclined surface to the lower end of the outer inclined surface.

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

In addition, the angle (θ ₁ ) and the angle (θ ₂ ) of the external slope with respect to the central axis of the abutment may be formed with a deviation within approximately 3 degrees.

In order to form the inner inclined surface, a ring-shaped protrusion may be formed on the ceiling of the receiving space of the crown medium, and the outer surface of the ring-shaped protrusion may be defined as a second close contact inclined surface to form a surface contact with the inner inclined surface.

In addition, a distance fixing part extending downward from the ceiling of the receiving space and entering the inner space of the abutment may be formed in the center of the ring-shaped protrusion. The distance fixing part may have an end fixed in the inner space of the abutment, and may prevent floating between the inclined surfaces forming the surface contact by limiting the coupling distance between the crown medium and the abutment.

The distance fixing unit may be provided in the shape of a column having a protrusion or a groove formed at an end thereof, and a groove or protrusion engaged with the protrusion or groove of the distance fixing unit may be formed in the inner space.

In addition, the distance fixing unit may be provided in a cylindrical shape having an elastic leg formed at an end thereof, a protrusion may be formed at an end of the elastic leg, and a groove engaged with the protrusion of the elastic leg may be formed in an inner wall of the inner space.

A female thread part may be formed in the lower part of the internal space under the groove engaged with the elastic leg, and when temporarily fixing an impression coping, etc. in addition to the abutment, it is possible to fix the part that fits the female thread part without forming a distance fixing part individually. can

A sealing inclined surface formed at an inclination angle smaller than the angle θ ₁ of the external inclined surface may be further formed below the external inclined surface.

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

The removable dental implant system of the present invention should be able to easily detach the prosthesis from the abutment and prevent the prosthesis from being separated by an unexpected event. For this purpose, it is possible to form the three-dimensional surface contact bonding of the present invention inside and outside the abutment, and maintain full contact without using a C-ring or the like.

In some cases, since it was not possible to completely prevent the prosthesis from falling off only by the surface contact, in the present invention, it is possible to prevent the crown medium and the prosthesis from moving easily from the abutment by adding a distance fixing part, and the abutment and the crown Configurable distance restrictions between media.

In forming the distance fixing part, it is possible to prevent the distance fixing part from being affected by external force by locating it in the inner space rather than the outer surface of the abutment, and by combining or integrally forming the distance fixing part with the crown medium, It may be possible to manufacture even a small size of about 5mm in height and width. Because the crown medium can be manufactured in a compact size, it can be applied to implants of small teeth such as incisors.

The removable dental implant system of the present invention can form a small crown medium due to the internal and external inclined surfaces and the distance fixing unit, and the coupling force using the surface contact can be maximally improved due to the distance limitation by the distance fixing unit. Relatively short crown media and abutments can withstand lateral pressure and eliminate the need for media removal.

In addition, since the distance fixing portion is rooted and fixed to the crown medium, when the crown medium and the prosthesis approach the abutment, the end of the distance fixing portion is partially deformed along the interior space or interior slope of the abutment in the axial direction Access in other inclined directions 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 by the surface contact. Even when the implanted state of the fixture is tilted using an external or internal inclined surface or when two or more inclined fixtures are connected with a bridge, the prosthesis is separated even if a separate prosthesis does not move in the direction coincident with the axial direction of the abutment. and mounting may be easy.

1 is a view for explaining a removable dental implant system according to an embodiment of the present invention.
FIG. 2 is a view for explaining a cross-section of the removable dental implant system of FIG. 1 .
FIG. 3 is a view for explaining the coupling structure of the removable dental implant system of FIG. 1 .
FIG. 4 is a view for explaining a coupling process of the removable dental implant system of FIG. 1 .
5 is a view for explaining the effect of the removable dental implant system of FIG.
6 is a view for explaining a crown medium of a removable dental implant system according to an embodiment of the present invention.
7 is a view for explaining a coupling process of the removable dental implant system using the crown medium of FIG.
8 is a view for explaining the effect of the removable dental implant system of FIG.
9 is a view for explaining a removable dental implant system according to an embodiment of the present invention.
FIG. 10 is a view for explaining a cross-section of the removable dental implant system of FIG. 9 .
11 is a view for explaining the coupling structure of the removable dental implant system of FIG.
12 is a view for explaining a coupling process of the removable dental implant system of FIG.
13 to 15 are views for explaining another use case of the removable dental implant system according to an embodiment of the present invention.
16 is a view for explaining a removable dental implant system according to an embodiment of the present invention.
17 is a view 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, the same numbers in this description refer to substantially the same elements, and may be described by citing the contents described in other drawings under these rules, and the contents determined to be obvious to those skilled in the art or repeated may be omitted.

Figure 1 is a view for explaining a removable dental implant system according to an embodiment of the present invention, Figure 2 is a view for explaining a cross section of the removable dental implant system of Figure 1, Figure 3 is the removable type of Figure 1 It is a view for explaining the coupling structure of the dental implant system, Figure 4 is a view for explaining the coupling process of the removable dental implant system of Figure 1, Figure 5 explains the effect of the removable dental implant system of Figure 1 It is a drawing for

1 to 5 , the removable dental implant system 100 according to an embodiment of the present invention may include a fixture 110 , an abutment 120 , and a crown medium 140 . The fixture 110 is a structure to be implanted in the alveolar bone, and when the fixture 110 is implanted, the crown medium 140 integrally joined with the abutment 120 and the prosthesis 20 which is an artificial tooth is fixed to the upper part of the fixture 110. can be The fixture 110 , the abutment 120 , and the crown medium 140 may be formed using a titanium material, and the prosthesis 20 may be formed using a composite resin or ceramic.

In this embodiment, the abutment 120 may be coupled to the fixture 110 in an internal manner, and the crown medium 140 may be coupled to the upper portion with the body 126 tapered downward. And, a male screw 128 may be formed at the bottom.

Since the fixture 110 is implanted in the alveolar bone, it may be affected by various variables depending on the patient's physical condition or surgical condition, and even after being implanted, the implanted position or angle may be changed during the stabilization process. For example, the condition of osseointegration of the fixture may be changed by occlusal force.

Therefore, in this embodiment, the abutment 120 may be provided separately, and after the fixture 110 is implanted, the abutment 120 may be fixed to the fixture 110 by screwing. In consideration of the patient's oral structure, the implanted conditions of the fixture, etc., the operator can determine the type or size of the abutment 120 later, and the original design may be maintained as it is, but the initial design and may be changed differently.

The upper portion of the abutment 120 provides an external inclined surface 122 in the shape of a horn to the outside, and an internal space 130 with an open upper portion to the inside and an internal inclined surface 132 formed on the upper portion of the internal space 130 . can provide Although a space corresponding to the internal space exists in the conventional abutment, the corresponding space in the conventional abutment is a space for the screw to pass through the prosthesis, whereas the internal space 130 in this embodiment is the prosthesis 20 ), and the inner inclined surface 132, the second close contact inclined surface 152, and other binding structures are 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 contact inclined surface 142 are formed in a truncated cone shape, but in another embodiment, they may be formed in a truncated pyramid shape. In addition, the external inclined surface 122 and the first close contact inclined surface 142 maintain an overall close contact, and unlike the prior art, contact on all surfaces without an element impeding the adhesion of the two inclined surfaces, such as a C-ring, sealing, or packing. state 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 in the lower portion of the external inclined surface 122 , and the sealing inclined surface 123 is also formed on the first close contact inclined surface 142 . ) corresponding to a vertical surface or an inclined surface may be formed.

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

Since the sealing inclined surface 123 is formed under 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 120, and external foreign substances may not It is possible to prevent inflow between the crown medium 140 and the abutment 120 . In addition, it is possible to reduce minute fluctuations between the crown medium 140 and the abutment 120 .

The crown medium 140 and the abutment 120 can maintain a combined state by the surface contact of the inclined surfaces facing the entirety, and close contact between the precisely machined external inclined surface 122 and the first close contact inclined surface 142 . , a very close surface contact can be formed by friction or negative pressure.

The crown medium 140 may form an accommodating space 145 that is opened downwardly like a cap, and the outer surface thereof may be joined to the prosthesis 20 . A plurality of irregularities 146 may be formed on the outer surface of the crown medium 140 in order to strengthen bonding with the prosthesis 20 .

2 and 4 , the crown medium 140 may provide an accommodation space 145 capable of accommodating the upper portion of the abutment 120 . The accommodating space 145 may form a first close contact slanted surface 142 forming an overall surface contact with the external inclined surface 122 of the abutment 120, and a ring-shaped protrusion 150 is located in the center of the ceiling of the accommodating space. is formed, and a second close contact inclined surface 152 may be provided as an outer surface thereof.

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

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

In the inner space 130 of the abutment 120 , an inverted truncated truncated inner inclined surface 132 may be formed as an inner wall. Accordingly, a more stable coupling may be formed by 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 outer inclined surface 122 and the inner inclined surface 132 may be formed at different heights. For example, the lower end of the inner inclined surface 132 may be positioned higher than the lower end of the outer 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.

Specifically, the height (h ₁ ) from the upper end of the abutment 120 to the lower end of the inner inclined surface may be shorter than the height (h ₂ ) from the lower end of the inner inclined surface to the lower end of the external inclined surface.

When the angle (θ ₁ ) and the angle (θ 2 ) of the external slope with respect to the central axis of the abutment are the angles (θ ₂ ), the two angles (θ ₁ , θ ₂ ) can be formed to be the same, but the abutment The angle (θ ₁ ) and the angle (θ ₂ ) of the internal slope with respect to the central axis of the element may be formed with a deviation within approximately 3 degrees. ( -3 ≤ (θ ₁ -θ ₂ ) ≤ 3 )

In addition, both the angle (θ ₁ ) and the angle (θ ₂ ) of the external slope with respect to the central axis of the abutment may be formed in the range of about 4 degrees to 15 degrees. Here, the angles (θ ₁ , θ ₂ ) of the inclined surfaces are opposite in direction, but may be understood as positive numbers, and if the angle is less than 4 degrees, the prosthesis 20 and the abutment 120 are coupled almost exclusively in the axial direction. Therefore, the difficulty of the system may be excessively increased, and if the angle is greater than 15 degrees, the bonding force between the prosthesis 20 and the abutment 120 due to the surface contact is weakened, so that the prosthesis 20 may be damaged even by a very small external force. It can be easily detached from the abutment 120 .

The surface contact between the outer inclined surface 122 and the first close contact inclined surface 142 as well as the surface contact between the inner inclined surface 132 and the second close contact inclined surface 152 causes the prosthesis to separate from the abutment 120 due to an unexpected event. can be prevented from becoming

As shown in FIG. 5 , an event that may occur in the implant system may occur by repeated chewing (a), and may also occur by pushing or twisting between teeth (b).

Referring to (a) of FIG. 5 , when an eccentric force F is applied from the upper portion of the prosthesis 20 , the torque is centered around the end O between the adjacent crown medium 140 and the abutment 120 . can occur Assuming that the event torque R1 caused by the eccentric force F is F*D ₁ , the resistance torque between the crown medium 140 and the abutment 120 at the opposite point A is f ₁₁ *d ₁ can be expressed as In addition, a resistance torque may also occur at a point (B) closer than that, 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 inclined surface 132 and the second close contact inclined surface 152, the peeling off is within the limit that can overcome the event torque (F*D ₁ ) generated by the resistance torque (f ₁₁ *d ₁ ). Although not occurring, 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 120 due to a sudden impact or repeated load, the prosthesis 20 may be futilely peeled off together with the crown medium 140 .

However, since the resistive force f ₁₂ at the point B occurs at different distances and in different directions, it is possible to prevent instantaneous separation between the crown medium 140 and the abutment 120 due to a sudden impact or repeated load. can

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

Referring to (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. Even in this case, the event torque R2 due to the eccentric force F may be expressed as F*D ₂ , and a relatively larger event torque F*D ₂ may be applied.

In this case, torque may be generated around the far end O between the crown medium 140 and the abutment 120 . Here too, if it is assumed that there is no resistance torque between the inner inclined surface 132 and the second close contact inclined surface 152, the resistance torque (f ₂₁ *d ₁ ) is peeled off within the limit that can overcome the event torque (F*D ₂ ). It will not occur, but since a relatively large event torque (F*D ₂ ) is applied, it may not be easy to overcome the event torque (F*D ₂ ) with the resistance torque (f ₂₁ *d ₁ ).

However, since the resistance force f ₁₂ between the inner inclined surface 132 and the second close contact inclined surface 152 is generated at different distances and in different directions, the crown medium 140 and the abutment by an impact or repeated load in a specific direction It is possible to prevent momentary lifting between the ment 120 .

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

The stable coupling between the abutment 120 and the crown medium 140 may be further strengthened by further forming the distance fixing unit 160 in the inner space 130 of the abutment 120 .

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

6 to 8 , the crown medium 140 ′ according to the present embodiment includes a distance fixing unit 160 in the center of the ring-shaped protrusion 150 , and the distance fixing unit 160 is an accommodation space 145 . ) can be formed extending 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 inner inclined surface 132 of the abutment 120 . can do.

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 unit 160 is provided with the abutment 120 . By limiting the distance between and the crown medium 140', the implant system can form a more stable bond.

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

7 shows a process before and after the end of the distance fixing unit 160 is coupled to the elastic piece 134, and the end of the distance fixing unit 160 passes through the elastic piece 134 and is temporarily fixed. The outer inclined surface 122 of the butt 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. state can be maintained.

Also in this embodiment, the angle θ1 of the external slope with respect to the central axis of the abutment and the angle θ2 of the internal slope with respect to the central axis of the abutment may both be formed in the range of about 4 degrees to 15 degrees, and The angle θ1 of the outer inclined surface and the angle θ2 of the inner inclined surface may be formed with a deviation within approximately 3 degrees. ( -3 ≤ (θ1-θ2) ≤ 3 )

In the present embodiment, the inner space 130 may be used as a space for maintaining the distance between the crown medium 140 and the abutment 120 by entering the distance fixing unit 160 . Actually, in this embodiment, since the distance fixing part 160 is formed in the center of the ceiling of the accommodation space, it may be difficult to form a screw hole in the prosthesis 20 .

Referring to FIG. 8 , as the coupling between the distance fixing part 160 and the elastic piece 134 is added in the inner space 130 , the coupling force between the crown medium 140 ′ and the abutment 120 may be further strengthened.

Referring to (a) of FIG. 8 , an eccentric force F acts on the upper portion of the prosthesis 20 , and the torque is centered around the end O between the adjacent crown medium 140 ′ and the abutment 120 . can occur

Assuming that the event torque caused by the eccentric force (F) is (F*D ₁ ), the resistance torque for the event torque (F*D ₁ ) is the resistance due to the surface contact between the external slope and the first close slope at point A. Torque (f ₁₁ *d ₁ ), resistance torque (f ₁₂ *d ₂ ) due to surface contact between the inner slope and the second close slope at point B, and resistance torque (f ₁₃ ) by the distance fixing unit 160 at point C *d ₃ ), so that peeling of the prosthesis 20 can be prevented more stably.

In particular, since the axial resistance force f ₁₃ of the abutment 120 of the distance fixing unit 160 may act larger than other resistance forces, the fixing force of the distance fixing unit 160 may have a significantly large effect. .

As shown in (b) of FIG. 8 , even if a larger event torque (F*D ₂ ) occurs, the resistance torque for the event torque (F*D ₂ ) is at the point A in the surface contact between the external inclined surface and the first close inclined surface. resistance torque (f ₂₁ *d ₁ ) by the resistance torque (f ₂₂ *d ₂ ) by the surface contact between the inner inclined surface and the second close inclined surface at point B, and the resistance torque by the distance fixing unit 160 at point C ( f ₂₃ *d ₃ ), so that peeling of the prosthesis 20 can be more stably prevented.

In addition, since the direction of the resistance force f ₁₁ at the point A and the direction of the resistance force f ₁₂ at the point B are different, it may be possible to respond to various variables occurring in the difference according to the direction of the resistance force.

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

9 to 12 , the removable dental implant system 200 according to an embodiment of the present invention may include a fixture 210 , an abutment 220 , and a crown medium 240 .

In this embodiment, the abutment 220 may be coupled to the fixture 210 in an internal manner, and the crown medium 240 may be coupled to the upper part with the tapered body 226 as the center, and to the lower part. The male thread 228 may be formed.

In this embodiment, the abutment 220 may be provided separately, and after the fixture 210 is implanted, the abutment 220 may be screwed to the fixture 210 .

An upper portion of the abutment 220 may provide an external inclined surface 222 having a conical shape and an internal space 230 having an open upper portion. The inner space 230 may be used as a space for maintaining the distance between the crown medium 240 and the abutment 220 by entering the distance fixing unit 260 .

The crown medium 240 may form an accommodating space open downward like a cap, and may be bonded to the prosthesis 20 on the outer surface. 10 and 12, the crown medium 240 provides an accommodating space capable of accommodating the upper portion of the abutment 220, and the accommodating space includes the external inclined surface 222 and the total area of the abutment 220. The first close contact inclined surface 242 is formed to form a surface contact, and in the center of the ceiling of the receiving space, the distance fixing part 260 fixed by force fitting to the ring-shaped protrusion 250 may be fixed downward.

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

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

Corresponding to the second close contact inclined surface 252 of the ring-shaped protrusion 250 , the abutment 220 has an inner inclined surface 232 on the inner wall of the inner space 230 at the same inclination angle as the second close contact inclined surface 252 , the inclined surface can be formed with

A hexa-shaped groove may be formed on the inner wall of the inner space 230 , and when the abutment 220 is fixed to the fixture 210 , the hexa-shaped tool is bound to the inner space 230 to bind the abutment. The ment 220 may be fixed.

In addition, a female threaded portion 236 may be formed below the circumferential groove 234 in the inner space 230 . When using a healing cap or an impression coping, the female screw part 236 may be used for temporarily fixing the corresponding part by using a screw-type coupling rather than a distance fixing part.

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

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

By forming the outer inclined surface 222 and the inner inclined surface 232, it is possible to enable insertion and removal of the prosthesis connected to two or more non-parallel abutments in a bridge structure. For this, reference may be made to the drawings and description 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 220 in a direction slightly inclined from the axis, The elastic leg 262 may be deformed within an allowable range while riding on the inner wall of the inner space 230 to enable stable coupling.

By the distance fixing part 260, the outer inclined surface 222 and the inner inclined surface 232 of the abutment 220 are stable on the first close contact inclined surface 242 and the second close contact inclined surface 252 of the crown medium 240. It can be kept in close contact. These inclined surfaces are kept in close contact with each other, and unlike the prior art, they can maintain contact on all surfaces without an element that prevents the adhesion of the two inclined surfaces, such as a C-ring, sealing, or packing.

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 below the external inclined surface 222 , and a vertical surface or inclined surface corresponding to the sealing inclined surface also in the first close contact inclined surface 242 . can be formed.

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

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

13 to 15 , in a state in which two or more fixtures 210 are implanted, the prosthesis 30 connecting the crown mediators 240 corresponding to each of them by a bridge may be manufactured. In the drawing, two fixtures 210 are implanted in the alveolar bone, and it is preferred that they are originally installed parallel to and perpendicular to each other, but it is assumed that the fixture 210 is spread in opposite directions due to some variable or intention. can

In FIG. 13 , the prosthesis 30 and the crown medium 240 of the bridge can be accessed through the external inclined surface 222 , and the end of the elastic leg 262 of the distance fixing unit 260 is the abutment 220 . ) can be entered from the end of the inner inclined surface 232 to the inside.

As the prosthesis 30 approaches the abutment 220 in FIG. 14 , the elastic leg 262 located inside is partially deformed like a bow, and may enter along the inner inclined surface 232 and the inner wall of the inner space.

And, as shown in FIG. 15, while the crown medium 240 is completely in close contact with the abutment 220, the protrusion of the elastic leg 262 is seated in the circumferential groove 234, and the first close contact inclined surface 242 is The outer inclined surface 222 may be in close contact, and the second contact inclined surface 252 may be in close contact with the inner inclined surface 232 . As such, the inclination of the external inclined surface and the first close contact inclined surface and the inclination of the inner inclined surface and the second close contact inclined surface 252 form a surface contact in a relatively large area, and the prosthesis is slightly deviated from the axial direction of the abutment. Even when entering at an angle, it is possible to enable the combination of the prosthesis and the abutment.

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 .

16 is a view 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 the present embodiment may be formed in a cylindrical shape, a plurality of elastic legs may be formed on its upper portion, and a protrusion may be formed inside the elastic legs.

The elastic piece 134' may be fixed in an interference fit manner inside the abutment 120, and a female screw part 136' may be further formed below the position where the elastic piece 134' is fixed. . The female screw part 136 ′ may be used for temporarily fixing a healing cap or an impression coping.

The distance fixing unit 160 may be inserted into the elastic piece 134 ′ to form a fixed distance and close contact between the crown medium 140 ′ and the abutment 120 . The first close contact inclined surface 142 and the second close contact inclined surface 152 of the crown medium 140' by the combination of the distance fixing part 160 and the elastic piece 134' are formed on the outer inclined surface of the abutment 120 ( 122) and the inner inclined surface 132 may form a stable surface contact.

17 is a view for explaining a removable dental implant system according to an embodiment of the present invention.

17, the removable dental implant system may include a fixture 210', an abutment 220', a crown medium 240, a ring-shaped protrusion 250, and a distance fixing unit 260, A surface contact between the external inclined surface 222 and the first close contact inclined surface 242 and a surface contact between the inner inclined surface 232 and the second close contact inclined surface 252 may be used.

Unlike the previous embodiment, the fixture 210 ′ and the abutment 220 ′ may be coupled by an external method using a hexa protrusion, and even if the external coupling is formed, the surface contact of the inclined surface and the distance fixing part can form a distance-limited bond of

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

As described above, although described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. You will understand that it can be done.

100: implant system 110: fixture
120: abutment 122: external slope
130: internal space 132: internal slope
140: crown medium 142: first close contact slope
150: ring-shaped protrusion 152: second contact inclined surface
160: distance fixing part

Claims (16)

In the removable dental implant system,
a fixture to be placed on the alveolar bone;
an abutment fixed to an upper portion of the fixture, the abutment providing an external truncated truncated surface and an inverted truncated truncated internal inclined surface;
a crown medium interposed between the abutment and the prosthesis to fix the prosthesis to the abutment by itself;
The crown medium includes a accommodating space coupled to the abutment 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 inner inclined surface,
The surface contact between the external 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 systems.
According to claim 1,
The detachable dental implant system, characterized in that the external inclined surface and the first close contact inclined surface are maintained in full contact without any inclusions such as a C-ring or packing.
According to claim 1,
Removable dental implant system, characterized in that the crown medium and the abutment are mutually bound without cement or adhesive.
According to claim 1,
A removable dental implant system, characterized in that the prosthesis can be detachably coupled to the abutment without forming a screw hole in the prosthesis.
According to claim 1,
The fixture and the abutment are removable dental implant system, characterized in that coupled by a screw coupling.
6. The method of claim 5,
The fixture and the abutment are removable dental implant system, characterized in that coupled by an internal method or an external method.
According to claim 1,
The external inclined surface is a removable dental implant system, characterized in that formed in the shape of a truncated cone or truncated pyramid.
According to claim 1,
The lower end of the internal inclined surface is a removable dental implant system, characterized in that located higher than the lower end of the external inclined surface.
9. The method of claim 8,
The height (h1) from the upper end of the abutment to the lower end of the inner inclined surface is a removable dental implant system, characterized in that it is shorter than the height (h2) from the lower end of the inner inclined surface to the lower end of the external inclined surface.
According to claim 1,
Removable dental implant system, characterized in that the angle (θ ₁ ) and the angle (θ ₂ ) of the inner slope of the external slope with respect to the central axis of the abutment is 4 degrees to 15 degrees.
11. The method of claim 10,
The angle (θ ₁ ) and the angle (θ ₂ ) of the internal slope with respect to the central axis of the abutment are removable dental implant system, characterized in that it satisfies the following equation.
-3 ≤ (θ ₁ -θ ₂ ) ≤ 3
According to claim 1,
In the crown medium, a ring-shaped protrusion is formed on the ceiling of the accommodating space, the second close contact inclined surface is formed outside the ring-shaped protrusion, and the center of the ring-shaped protrusion extends downward from the ceiling of the accommodating space and the abutment Detachable dental implant system, characterized in that a distance fixing portion is formed in which the end is fixed to the abutment entering the inner space of the ment.
13. The method of claim 12,
The distance fixing unit is provided in a columnar shape with a protrusion or groove formed at an end thereof, and a groove or protrusion engaged with the protrusion or groove of the distance fixing unit is formed in the inner space.
13. The method of claim 12,
The distance fixing part is provided in a cylindrical shape having an elastic leg formed at an end thereof, a protrusion is formed at an end of the elastic leg, and a groove engaged with the protrusion of the elastic leg is formed on the inner wall of the inner space. for implant systems.
15. The method of claim 14,
A removable dental implant system, characterized in that a female screw portion is formed in a lower portion of the inner space under the groove engaged with the elastic leg.
According to claim 1,
A removable 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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