KR20210026894A - Detachable abutment - Google Patents

Abstract

The present invention discloses an abutment. The abutment for supporting a crown via a fixture and the crown of an implant according to an embodiment of the present invention comprises: an upper body part which has a receiving space of a set size on the inside thereof; a lower body part which has a size smaller than that of the receiving space, and is coupled to the upper body part through a holder disposed in the receiving space; and an elastic member which is disposed on the outside of the holder and having a size that is not smaller than a space between the holder and the receiving space to press the inner surface of the receiving space to the outside when the holder is disposed in the receiving space.

Description

Detachable abutment {DETACHABLE ABUTMENT}

The present invention relates to an abutment, and more particularly, to an abutment having excellent bonding force between an upper body and a lower body and easy to separate.

In general, an implant is a biocompatible implant body (fixture: fixture: ) To restore the function of natural teeth.

The implant undergoes osseointegration, which is a morphological, physiological, and direct connection between the jawbone that maintains its normal function and the surface of the implant body, and then undergoes a process of remodeling the jawbone and bone around the implant. There are several types of such implants, but recently, screw-type intraosseous implants are mainly used.

The implant is largely composed of a fixture, an abutment, and a crown, and the fixture serves as a root of a tooth and is mainly made of titanium, and the abutment is a crown and a fixture. It is a part that connects the teeth and corresponds to the neck of the natural tooth, and the crown corresponds to the head of the tooth in the natural tooth as an upper prosthesis of the implant, and materials such as gold or ceramic are used in consideration of the position and condition of the tooth. Use.

The implant first checks the implant position and drills to create a space for the implant body in the jawbone. In other words, after drilling several times until the size is suitable for the diameter of the implant body, the fixture is carefully planted. When satisfactory bone adhesion is achieved with the planted fixture, the process of connecting the abutment and binding the crown is proceeded.

In general, the detachable abutment is manufactured by combining the upper body and the lower body, and both components are easy to shake or separate during the mastication movement. In the process of chewing food, the impact transmitted to the implanted implant when chewing hard food is not small. In addition, in the case of an implanted person, when an external impact is applied to the crown inserted in the upper body, it becomes easier to separate the upper body and the lower body due to the principle of the lever.

In addition, when the implant is replaced, the upper body and the lower body of the abutment, which are firmly coupled, can be separated as needed. However, since the two components of the strongly coupled abutment are not easy to separate, it may damage the gum tissue or teeth around the implant during the separation process.

In addition, the crown located on the top of the implanted implant may also need to be replaced due to abrasion due to the passage of time or peri-implantitis. However, in general, the integrated abutment used for an implant has a problem that the crown is strongly attached and fixed through dental cement, so that it is very difficult to replace the crown combined with the abutment.

Embodiments of the present invention are intended to provide an abutment including an upper body portion that can be strongly coupled to the lower body portion so that the upper body portion and the lower body portion of the abutment are strongly coupled so that the upper body portion is not shaken or separated despite an external impact. .

According to an aspect of the present invention, in the abutment for supporting the crown through the fixture and the crown of the implant, the upper body portion in which an accommodation space of a size set inside is formed and a size smaller than the accommodation space of the accommodation space, When the fixing base is disposed in the accommodation space by having a size that is at least not smaller than the space between the fixing base and the accommodation space and disposed on the outside of the fixing base and the lower body coupled to the upper body through a fixing base disposed in the accommodation space It may include an elastic member for pressing the inner surface of the receiving space to the outside.

In addition, the fixing base may include a seating portion that enters the inner side but is continuously formed along an outer circumferential surface and into which the elastic member can be seated.

In addition, the upper body portion includes an upper part and a lower part, and the upper part and the lower part are coupled to each other, so that the elastic member may be seated in a gap formed between the lower end of the upper part and the lower part of the lower part.

The upper body portion may include at least one separation hole on an outer circumferential surface, and the hole may be formed higher than the fixing table inserted into the accommodation space.

The fixture may include a first uneven portion formed by spaced apart a plurality of grooves along an outer circumferential surface, and the upper body portion may include a second uneven portion engaged with the first uneven portion along an inner circumferential surface located in the receiving space. have.

The fixing table may include a fastening groove on an upper surface, and the lower body may include a thread formed along an outer circumferential surface.

In the embodiments of the present invention, since the combined upper and lower body portions are excellent, they are not easily separated due to strong occlusal force or external impact, and the combination of the upper body and the lower body can be made more robust by using the restoring force of the elastic member.

In addition, by easily separating the strongly coupled upper body and lower body, damage to adjacent teeth or gums that may be caused by a strong external force in the separation process can be minimized.

1 is a perspective view showing an embodiment of the present invention.
2A to 2C are cross-sectional views showing the above embodiment and a modified example.
3 is an exploded perspective view showing the embodiment.
Figure 4 is a perspective view showing the lower body and the elastic member of the embodiment.
5A to 5B are perspective views illustrating an upper part and a lower part included in the upper body of the embodiment.
6A is a side view showing a modified example of the embodiment, and FIGS. 6B to 6C are cross-sectional views showing a modified example of the embodiment.

Hereinafter, an abutment according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an abutment according to an embodiment 1000 of the present invention, wherein the embodiment 1000 is an upper body portion 1200 and a fixture (not shown) to which a crown (not shown) can be mounted. It includes a lower body part 1100 to be inserted into. In addition, it includes an elastic member (1300) that is seated on the lower body (1100) to reinforce the bonding force between the upper body (1200) and the lower body (1100).

As shown in FIG. 2A, the lower body portion 1100 includes a fixing table 1110 extending in one direction on at least one surface and having a shape like a column.

The fixing member 1110 is a configuration that combines the upper body portion 1200 and the lower body portion 1100, and the fixing member 1110 extending from the lower body portion 1100 is inserted into the upper body portion 1200 so that the upper body portion 1200 is Fix it so that it does not shake.

The fixing table 1110 includes a seating portion 1122 dug along the outer circumferential surface to a predetermined depth. The seating portion is a configuration in which the elastic member can be seated, and fixes the elastic member so that the elastic member does not deviate from a predetermined position.

The position of the seating portion is not particularly determined, but in the above embodiment, it is covered by the elastic member 1300 in FIG. 2A, but as shown in FIG. 6A, the seating portion 1122 is formed between the upper side and the lower side of the fixing table 1110.

In addition, the upper body portion 1200 includes an accommodation space in which the fixing table 1110 is inserted as shown in FIGS. 2A to 2C. The accommodation space is formed on the lower surface of the upper body portion 1200 and is opened, and a holder 1110 for coupling the upper body portion 1200 and the lower body portion 1100 may be inserted.

The upper body 1200 includes an upper part 1210 and a lower part 1220, and is formed by combining the upper part 1210 and the lower part 1220, so that a gap in which the elastic member 1300 can be seated. Including (1230). As shown in FIG. 2A, the elastic member 1300 may be fitted in the gap 1230 having a shape that is shaped as if it is dug at a predetermined depth.

Specifically, as shown in FIG. 2A, the lower part 1220 is inserted into an accommodation space formed by opening at least both sides of the lower part 1220. The end of the upper part 1210 inserted into the accommodation space is spaced apart from the lower end of the lower part 1220 in contact with the uneven part, so that a gap 1230 is generated. An elastic member is embedded between the gap and the seating portion.

The length between the lower end of the upper part 1210 inserted in the lower part 1220 and the upper end of the lower part 1220 is shorter than the depth of the receiving space formed in the lower part 1220, so that the upper part 1210 and the lower part ( 1220), a gap is generated.

In the embodiment shown in FIG. 2A, since the lower part of the upper part 1210 is in all directions, the lower part of the upper part 1210 inserted into the lower part 1220 is substantially cylindrical. In response to this, the lower part of the lower part 1220 is also around the fixing table 1110, so it is approximately cylindrical. Therefore, the shape of the gap 1230 formed between the upper part 1210 and the lower part 1220 is also similar to a cylindrical shape, so that the annular elastic member 1300 may be embedded in the gap 1230 without a significant problem in seating.

The elastic member 1300 is a configuration capable of deforming the volume by an external force, it is possible to make the coupling of the upper body and the lower body more firmly. The elastic member 1300 includes a cutout 1310. The cutout 130 may have a gap formed between both end faces when the elastic member 1300 in the form of a band surrounds the circumference of the fixture, and may be referred to as this part. The elastic member is pressed up and down by the strong pressure of the upper body between the seating portion and the gap of the abutment, but due to the incision 1310, the elastic member ( 1300) can be freely deformed. In addition, since the elastic member simply needs to be disposed in a form surrounding the circumference of the fixture, assembling property is improved.

In addition, the elastic member may be formed in the form of a circular band, but may be formed by cutting only a certain area from the outside to the inside or from the inside to the outside.

In FIG. 2A, the cut-out part 1310 abuts due to a narrow space, but the cut-out part 1310 of the embedded elastic member may be spaced apart and include a space, since it is not limited thereto.

For a solid coupling between the upper body 1200 and the lower body 1100, the diameter of the fixing table 1110 and the diameter of the accommodation space of the upper body 1200 may be approximately the same or the diameter of the accommodation space may be slightly larger. In order for the fixing table 1110 to be inserted into the upper body 1200 without difficulty, the diameter of the receiving space may be larger than the diameter of the fixing table 1110. In preparation for such a case, the elastic member may play a role of supplementing the coupling force that may be somewhat weakened.

The elastic member 1300 fitted to the mounting portion 1122 of the fixing table 1110 may be larger than a predetermined volume for a strong resistance force so that the combined upper body portion 1200 is not separated. The elastic member 1300 having a predetermined volume or more is greatly deformed by a strong pressure of the upper body 1200 in the abutment configured by inserting the upper body 1200 into the abutment, and has a strong repulsive force on the fixing table 1110 and the upper body 1200 Can work. The elastic member 1300 having a predetermined volume or more can easily cause volume deformation through the incision, thereby minimizing the strong repulsive force that may be generated in the fixing table 1110 and the upper body 1200, and the seating portion 1122 and the gap ( 1230) can be changed fluidly according to the shape.

That is, among various cases in which the upper body part 1200 and the lower body part 1100 can be combined, the elastic member 1300 is embedded in the gap 1230 of the upper body part 1200 and the lower part in the upper body part 1200 When (1100) is inserted, the fixing member 1110 is inserted into the receiving space of the upper body portion 1220, and the seating portion 1122 presses the elastic member 1300 toward the gap 1230 to form the elastic member 1300. Is transformed. When the space between the gap 1230 and the seating part 1122 is smaller than an arbitrary standard compared to the volume of the elastic member 1300, the elastic member 1300 is combined with the upper body 1200 and the lower body 1100. Due to the pressure applied to the incision part 1310, opposite sides of the incision part 1310 are brought into contact, and furthermore, the elastic member 1300 decreases in volume due to the loss of space in the cut part 1310 and is stronger toward the fixing table 1110 and the lower part 1220. By pressing, the bonding force and fixing force between the upper body portion 1200 and the lower body portion 1100 are made even more solid.

The upper part 1210 and the lower part 1220 of the upper body part 1200 are coupled, but the elastic member 1300 is seated at the lower end of the receiving space of the lower part 1220 and the upper part 1210 is inserted. The lower end of the upper part 1210 presses and fixes the elastic member 1300. The upper part 1210 and the lower part 1220 may form the upper body part by simple coupling, but both components may be combined by a method such as welding after insertion to form the upper body part more firmly.

In addition, the upper body portion is formed by combining at least two components including an upper part and a lower part to facilitate the seating of the elastic member. That is, after the elastic member is seated in the receiving space of the lower part, the upper part is coupled to the lower part, so that the elastic member can be easily and stably seated in the gaps of both configurations. Therefore, the elastic member may not be separated during the process of later being inserted into the receiving space. However, after the elastic member is seated between the upper part and the lower part, the upper and lower parts do not have to be combined, but after the elastic member is seated in the seating part, the upper part and the lower part are combined to form the lower part. It can also be combined with.

The fixing base 1110 of the lower body 1100 may be inserted into the upper body 1200 into which the elastic member 1300 is inserted to form an abutment. For easy coupling between the upper part 1210 and the lower part 1220 by minimizing the resistance that may occur due to the elastic member 1300 in the process of inserting the fixing table 1110, the upper part of the fixing table 1110 is It can be rounded as shown in 2a. Therefore, the elastic member 1300 embedded in the upper body portion 1200 is rounded, so that it can be smoothly reached to the seating portion 1122 through the rim of the upper portion of the fixing table that is gently inclined.

The upper body 1200 may include at least one separation hole 1250 on an outer circumferential surface as shown in FIG. 2A.

The separation hole 1250 is a configuration for separating the upper body portion 1200 and the lower body portion 1100, and a configuration such as a pin (not shown) having a predetermined length or longer in the inserted abutment is inserted into the separation hole 1240 After that, the upper body part 1200 and the lower body part 1100 may be separated by various methods such as a lever principle or a direct pull method by using a mechanism capable of holding the pin as a support.

In the above embodiment, the separation hole 1250 is composed of 4 symmetrically spaced at equal intervals on the outer circumferential surface of the upper body part 1200, and even if the upper body part 1200 and the lower body part 1100 are strongly coupled, external force is applied from all directions. Can be easily removed.

The separation hole 1250 is formed higher than the fixing table 1110 inserted into the upper body 1200 so that the upper body 1200 coupled to the lower body 1100 can be separated more easily. That is, the separation hole 1250 is located sufficiently separated from the gum near the abutment, so that the pin inserted into the separation hole 1250 can be gripped, so that the upper body part 1200 and the lower body part 1100 can be separated. I can. In addition, when the mechanism for holding the pin is supported by the adjacent teeth and rotated (using the lever principle), the upper body 1200 is rotated without great resistance of the fixture 1110 and can be separated from the lower body 1100.

The separation hole 1250 may be formed in the upper part 1210 as shown in FIG. 2A, but the separation hole 1251 may be formed in the lower part 1220 as shown in FIG. 2B, whereby the separation hole is formed. Is not necessarily limited. Further, although not shown, the separation hole may be formed in both the upper part and the lower part. That is, if the separation hole is formed in the upper body at a position where the abutment is not buried in the gum, the position is not a problem.

In the upper body 1200, as shown in FIG. 2C, the lower end of the upper part 1210 is in contact with the upper end of the lower part 1220, so that the upper body 1200 may be formed without a gap in both configurations. When the elastic member 1300 is located in a space contained as a member of the gap, it receives a greater pressure inward, and due to the reaction of this pressure, the elastic member presses the upper body 1200 more strongly to the outside, and the upper body ( 1200) and the lower body portion 1100 can be firmly coupled.

In addition, it is possible to more reliably prevent the internal elastic member from being separated by forming an angular rim without rounding the upper portion of the fixing table 1110 as shown in FIG. 2C.

The fixing table 1110 may include a first uneven portion 1130 in which a plurality of grooves spaced apart along an outer circumferential surface are formed as shown in FIG. 3.

The first concave-convex portion 1130 is formed by repeating a concave groove and a configuration protruding relative to the groove along the circumference of the fixing table 1110.

In addition, the upper body portion may include a second uneven portion 1260 formed by spaced apart a plurality of grooves along an inner circumferential surface positioned in the accommodation space. The second uneven portion 1260 is formed in a similar shape to the first uneven portion 1130. The protruding configuration of the second concave-convex portion 1260 of the upper body is disposed in the groove in the first concave-convex portion 1130 of the fixture 1110, and the protruding configuration of the first concave-convex portion 1130 is the second concave-convex portion 1260 ) Is placed in the engraved groove and combined. Accordingly, the upper body portion 1200 may be coupled to the fixing table 1110 in a non-rotatable manner.

Additionally, the upper body portion 1200 and the lower body portion 1100 may include a flange capable of stably supporting the crown.

As shown in FIGS. 2A to 2C, the upper body 1200 has an outer peripheral surface inclined so as to increase in diameter from an upper side to a lower side, and includes a second flange 1240 at the lower end. Similar to the upper body portion 1200, the second flange 1240 is inclined to increase in diameter from the upper side to the lower side.

The outer circumferential surface of the upper body 1200 is inclined so that the crown can be easily inserted, and the crown is seated on the upper surface of the second flange 1240 so that insertion of a predetermined depth or more is restricted.

The lower body 1100 includes a first flange 1140 so as to face the second flange 1240. Therefore, the crown seated on the second flange 1240 may be supported more stably.

As shown in FIG. 4, the fixing table 1110 may include a fastening groove 1150 dug at a predetermined depth on the upper surface. The shape of the fastening groove 1150 is not limited, but in the above embodiment, the fastening groove 1150 is provided in a hexagonal shape so that a hexa driver may be inserted.

The lower body 1100 includes a fastening groove 1150 and includes a thread 1160 on the outer peripheral surface of the lower side as shown in FIG. 4. Accordingly, the lower body portion 1100 may be rotated and inserted into the fixture through the screw thread by rotation of the hexa driver inserted into the fastening groove 1150.

6A to 6C are modified examples, and the lower body 1102 includes an angular shape at the lower end 1132 of the fixing table formed in a round shape to facilitate preventing rotation between the upper body and the lower body 1102. The lower end of the fixing table 1102 does not have a constant number of angular surfaces, but in FIG. 6A, six angular surfaces are shown. In addition, the inner circumferential surface 1262 of the upper body in contact with the fixture can also be further prevented from rotation of the upper body and lower body 1102 including an angled inner surface in accordance with the lower end 1132 of the angular fixture as shown in FIG. 6B.

The mounting portion 1222 of the fixture is smoothly rounded up and down as shown in FIG. 6A so that the lower part can be easily and firmly mounted. In addition, the seating portion 1222 is recessed to be rounded inward, so that the elastic member can be easily separated. That is, when the crown seated and fixed on the assembled abutment is to be separated as necessary, the elastic member is formed on the round surface of the seating portion 1222 by applying an external force such as an attractive force to the crown and upper body after the crown is gripped. It is gently separated along the crown and the upper body can be separated from the lower body.

The lower part 1222 includes an angular surface at the lower end 1262 of the inner circumferential surface in order to be in contact with the angular lower end surface of the fixture without a gap, as shown in FIG. 6B, and the elastic member can be stably seated by protruding inward at the upper end thereof. And, by contacting the seating part, the combination of the upper body and the lower body can be strengthened. The upper part has an open surface as shown in FIG. 6C so that the upper part of the fixing table can be inserted.

As described above, the upper body portion is a separate type and may be formed by matching a plurality of components (upper part and lower part).

In addition, the upper part 1210 may be open in both directions as shown in FIG. 2A and may be empty, but the upper part 1212 may have a limited opening as shown in FIG. 6C. The inner wall of the lower part protrudes so that the upper part can be seated. Therefore, the inner wall is coupled to the upper body and the lower body to strongly press the fixing table and at the same time support the upper part and the elastic member.

The lower part is in close contact with the fixing table together with an elastic member, and a strong pressure is applied to the fixing table in most areas of the receiving space of the lower part, so that the upper body and the lower body are firmly coupled.

The upper body is composed of an upper part and a lower part, and the risk of damage can be reduced due to the stress generated by strong pressure. Since the upper body is configured by being combined in a plurality of configurations, it is possible to more easily withstand the resistance force caused by the combination with the lower body. That is, stresses generated in a specific part of the upper body are blocked in the vicinity of the coupling between the plurality of components, so that damage to the entire upper body due to high stress can be prevented.

In addition, even if any one of the components of the upper body is damaged by strong external force in a specific part, only the damaged component may be replaced without the need to replace the entire upper body.

As described above, one embodiment of the present invention has been described, but those of ordinary skill in the relevant technical field add, change, delete or add components within the scope not departing from the spirit of the present invention described in the claims. It will be possible to variously modify and change the present invention by the like, and it will be said that this is also included within the scope of the present invention.

In addition, the above-described terms are terms defined in consideration of functions in the present invention, which may vary according to the custom or intention of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

In addition, when referring to "including" a component in the present application, it means that other components may be further included rather than excluding other constituent elements unless specifically stated to the contrary.

Lower body: 1100, 1102
Fixture: 1110, 1112
Seating area: 1122
1st uneven part: 1130
1st flange: 1140
Fastening groove: 1150
Thread: 1160, 1162
Upper body: 1200
Upper part: 1210, 1212
Lower part: 1220, 1222
Gap: 1230
2nd flange: 1240
Separation hole: 1250, 1251, 1252
2nd uneven part: 1260
Elastic member: 1300
Incision: 1310

Claims (6)

In the abutment that supports the crown by mediating the fixture of the implant and the crown,
An upper body portion having an accommodation space of a size set inside;
A lower body having a size smaller than that of the receiving space and coupled to the upper body through a fixing table disposed in the receiving space; And
An abutt disposed on the outside of the fixing table and having a size not smaller than the space between the fixing table and the receiving space, and including an elastic member for pressing the inner surface of the receiving space outward when the fixing table is disposed in the receiving space Ment. The method of claim 1,
The fixed base is formed in a continuous manner along the outer circumferential surface of the inside and includes a seating portion on which the elastic member can be seated. The method of claim 1,
The upper body portion includes an upper part and a lower part,
The upper part and the lower part are combined to allow the elastic member to be seated in a gap formed between a lower end of the upper part and a lower end of the lower part. The method of claim 1,
The upper body portion includes at least one or more separation holes on the outer circumferential surface,
The hole is formed at a higher position than the fixing table inserted into the receiving space, abutment. The method of claim 1,
The fixing table includes a first uneven portion formed by spaced apart a plurality of grooves along an outer circumferential surface,
The upper body portion includes a second uneven portion capable of engaging with the first uneven portion along an inner circumferential surface positioned in the accommodation space. The method of claim 1,
The fixing table includes a fastening groove on the upper surface,
The lower body portion comprises a thread formed along the outer circumferential surface, abutment.

Images