KR101566795B1 - Ball-type attachment device for overdenture - Google Patents

Abstract

The present invention relates to a ball type attachment device for an overdenture and, more specifically, to a ball type attachment device for an implant supported overdenture comprising: an abutment forming a ball type coupling protrusion at an exposed end; and a retainer coupled to the coupling protrusion to be detachable in a fitting manner, wherein the retainer includes: a detachment unit forming a concave hemisphere shaped coupling groove corresponding to a ball shape of the coupling protrusion to insert-couple half and more of the ball of the coupling protrusion to the inside to be detachable, making an external appearance have a shape corresponding to a shape of a housing groove of a fixating unit, and being composed of a deformable material; and the fixating unit fixedly coupled to the overdenture and forming the housing groove with the shape corresponding to the shape of the external appearance of the detachment unit to insert-couple the detachment unit.

Description

[0001] Ball-type attachment device for overdenture [0002]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ball type attachment device for an overdeturn having excellent durability and detachability.

Implantation is the implantation of an artificial root, or tooth root. It is a procedure to implant an artificial tooth made of titanium or the like which does not have a rejection reaction to the human body so as to replace the tooth root of the lost tooth, and to fix the artificial tooth after implanting the teeth into the alveolar bone. In the case of general prostheses or dentures, the surrounding teeth, bones, and gums are damaged after a while, but the implants do not injure the surrounding tissues, and they can be used semi-permanently even though they have the same function and shape as natural teeth.

However, such an implant procedure is costly and time consuming when a large number of teeth are missing due to the number of missing teeth, and it is difficult to perform the procedure when the amount of remaining gum bone is insufficient.

Recently, an implant supported overdenture technique (hereinafter, referred to as an 'implant overdenture technique') utilizing both the advantages of conventional dentures and implants has been spotlighted.

Implant overdenture is a procedure where two or four implants are placed on the gum and then the overdenture is detachably fixed in various combinations. According to this, it is possible to replace the high-cost implant treatment method while compensating for the disadvantage of the conventional denture treatment method in which there is no supporting structure for supporting the chewing force of the food other than the gums, and it can be applied even when it is difficult to apply the implant treatment method It is becoming a new alternative. FIG. 1A shows a model photograph showing the results of the implant overdenture procedure.

In the implant overdenture, an implant in a special form is called an abutment, and an overdentifier-side coupling device is called a retainer so that the exposed end for detachment is detachably coupled to the retainer. A method of attaching and detaching an overdenture to a gum, that is, a method of attaching and detaching an abutment (an exposed end of an abutment) and a retainer by a bar, a magnet, a detachable ball joint- (ball attachment) are known, and various types of attachment types are generalized from the viewpoints of convenience of maintenance, complement of snap feeling and masticating force (chewing force) at the time of desorption.

The inventor of the present invention has developed a ball type attachment device using an overdetacher retainer made of an elastically deformable material, and has been registered with the registration practice model No. 20-0470574 (see FIG. 1B). This makes it easy to combine and separate the overdentures while still having a simple structure.

On the other hand, the outer surface of the retainer is bonded to the overdenture by the resin. According to the prior art, since the retainer is made of an elastic plastic material, the outer surface of the retainer is finely pushed and returned to its original position due to the attachment / detachment of the overdentifier. When this is repeated, the retainer and the resin are slightly widened, The retainer may fall from the overdenture. Also, there is a problem that the sense of chewing of the user is reduced due to the excessive elasticity of the retainer inevitably.

Registration Utility Model 20-0470574

An object of the present invention is to provide a ball type attachment device for an overdeceler, which can prevent the retainer and resin from spreading even when used repeatedly.

Another object of the present invention is to provide a ball type attachment device which is superior in physical properties of the retainer (elasticity of the material itself) but also in the detachability of the overdenture while preventing elasticity from being reduced due to excessive elasticity .

In order to accomplish the above object, the present invention provides an attachment device of an implant-supported overdenture having an abutment having a ball-shaped coupling protrusion formed at the exposed end thereof and a retainer detachably coupled to the coupling protrusion in a fitting manner Wherein the retainer has a concave hemispherical coupling groove corresponding to a ball shape of the engaging projection so that the ball of the engaging projection is removably inserted into the retainer so that half of the ball can be detachably inserted into the retainer, a shape corresponding to the shape of elastic deformation and the removable portion of the plastics material, is secured in combination with the over dencheo, and the removable portion inserted bonds receiving groove of a shape corresponding to the removable portion outer shape formed to be over-den consisting of government And is an applied ball type attachment device.

As described above, according to the present invention, the retainer is made of the double material and structure of the elastic material portion and the non-elastic material portion, thereby enabling the ball type attachment device to easily detach and fix the overdentifier without deteriorating the sense of chewing.

In addition, unlike a complicated prior art in which the retainer itself needs to be replaced in an overdenture when the elasticity of the retainer is reduced due to repeated use by making the retainer a double material and structure of elastic material and inelastic material, The maintenance of the overhauler can be easily performed.

FIG. 1A is a model photograph showing the results of an implant overdenture procedure. FIG.
1B is an exemplary view of a ball type attachment device according to the prior art;
2A is a perspective perspective view and a side view of an example of a retainer detachment portion according to the present invention;
FIG. 2B is a partially cutaway side view and a partial cutaway bottom perspective view of an example of a retainer fastener according to the present invention. FIG.
2C is a cross-sectional view showing an example of the engagement relationship and structure of the detachment portion of the retainer and the engagement protrusion of the abutment according to the present invention.
FIG. 2 (d) is a partial cutaway side view showing a state where the detachment portion of the retainer according to the present invention is inserted and fixed in the fixing portion. FIG.
FIG. 2E is a cross-sectional view of a retainer according to the present invention in which engaging elements are formed on an outer surface of a detachable portion and an inner surface of a corresponding fixed-portion receiving groove corresponding to the outer surface of the retainer.
Fig. 3 is a partial cutaway side view of the retainer according to the present invention in a state where an abutment is engaged. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples. It is also to be understood that when an element of a claim is referred to by reference to an element, it is for the purpose of illustration only and is not intended to limit the element.

As described above, according to the present invention, there is provided an abutment 20 having an abutment 20 formed with a ball-shaped engaging projection 21 at an exposed end thereof, and a retainer 10 detachably engaged with the engaging projection 21 in a fit- In the attachment type overtension attachment device of the support type, the retainer 10 is formed of a double material and a structure of a detachable portion 11 (elastic material portion) and a fixing portion 12 (inelastic material portion).

The ball type attachment device for an overdenture according to the present invention is applied to an implant supported type overdenture and includes an abutment 20 inserted into a patient's gums and an abutment 20 fixed in an overtension 20 which are detachably coupled to each other.

The present invention is not limited to any form or structure of the abutment 20 in the attachment apparatus of the overtension type of the implant-supported type as long as the "ball-shaped engaging projection 21 is formed at the exposed end".

2A is a perspective view and a side view of an example of a retainer 10 detachment part 11 according to the present invention, FIG. 2B is a partially cutaway side view and a partially cutaway lower perspective view of an example of a fixing part 12, 11 is a sectional view showing an example of the engagement relationship and structure of the engaging protrusion 21 of the abutment 20 and the partial cut side view in the state in which the detachable portion 11 is fixedly inserted into the fixing portion 12 in Fig. Respectively.

The retainer 10 is engaged with the abutment 20 in a fitting manner when the overdentator is worn in a state where the retainer 10 is fixed in the overdentifier with an adhesive resin or the like.

In the retainer 10 according to the present invention, the detachable portion 11 corresponds to the shape of the ball of the engaging projection 21 so that the ball of the ball-shaped engaging projection 21 can be inserted and removed in a detachable manner And has an outer shape that is inserted into the receiving groove 12a of the fixing portion 12. The engaging groove 11a has a substantially semi- Since the engaging projection 21 of the abutment 20 is fitted to and detached from the engaging groove 11a in a fitting manner, it is preferable that the engaging projection 21 is made of a material which can be elastically deformed to some degree, It does not rule out anything.

Since the balls of the ball-shaped coupling protrusions 21 are inserted into the coupling grooves 11a such that the balls of the ball-shaped coupling protrusions 21 are detachably inserted into the coupling grooves 11a, It is a concave hemispherical shape. 2C, when the ball of the coupling protrusion 21 is inserted, the coupling groove 11a is formed so that the plane having the maximum diameter of the ball is located inside the inlet of the coupling groove 11a . At this time, it is preferable that the entrance diameter d 'of the coupling groove 11a is smaller than the maximum diameter d (maximum diameter of the coupling projection ball) as shown in FIG. 2C. As a result, the engaging projection 21 does not slip out of the engaging groove 11a (unless the user intentionally pulls it to pull out the overdenture), and a stable engaging force is maintained. Since the maximum diameter of the coupling protrusion 21 is substantially equal to the maximum diameter d of the coupling groove 11a, the entrance diameter d 'of the coupling groove 11a is smaller than the maximum diameter of the coupling protrusion 21, Since the detachable portion 11 of the retainer 10 is elastically deformed, the mouth of the coupling groove 11a is slightly opened and closed during the insertion of the coupling protrusion 21 into the coupling groove 11a, 21 are snap-fitted and detached in a fitting manner in the coupling groove 11a.

The outer side of the detachable portion 11 is a complementary shape corresponding to the shape of the receiving groove 12a of the fixed portion 12 so as to be inserted into the receiving groove 12a of the fixed portion 12. [ It is sufficient that the outer shape of the detachable portion 11 and the shape of the receiving groove 12a of the corresponding fixing portion 12 are complementary to each other. However, when the detachable portion 11 is inserted in the fixed portion 12 in an arbitrary direction It is preferable that the shape of the convex hemispheres and the shape of the concave hemispheres corresponding thereto be fixed (see Figs. 2A and 2B).

In the retainer 10 according to the present invention, the fixing portion 12 has a receiving groove 12a having a shape corresponding to the outer shape of the detachable portion 11 so that the detachable portion 11 is inserted therein, And the outer surface is fixedly coupled to the overdenture by an adhesive resin or the like. As described above, the receiving groove 12a is in a shape complementary to the outer shape of the attaching / detaching portion 11.

The outer surface of the retainer 10 securement portion 12 allows the retainer 10 to engage with the overdenture in various directions or angles while minimally affecting the thickness of the overdenture, (See Fig. 2B), which is convex hemispherical and partially formed so as to increase the adhesive force of the adhesive layer.

Since the fixing portion 12 is free of elasticity or at least free of wear and does not cause any problems during the life of the overdenture, it can be made of a plastic or metal material having high hardness.

1A, in the ball type attachment device for an overdenture according to the present invention, the abutment 20 is implanted into the gum such that the ball-shaped engaging projection 21 is exposed to the outside, and the retainer 10 Is fixed to the lower surface of the overdentifier so that the coupling groove 11a of the detachable portion 11 is exposed in a state where the detachable portion 11 is coupled to the fixed portion 12. [ Of course, the position and direction of the abutment 20 and the retainer 10 are adjusted to be complementary.

Fig. 3 is a partial cutaway side view of the retainer 10 according to the present invention in which the abutment 20 is engaged. 3, the outer surface of the retainer 10 is fixedly coupled to an overdenture (hatched line display portion), and the lower outer surface of the abutment 20 is fixedly coupled to the gum (hatched portion).

As described above, by applying the abutment 20 having the ball-shaped engaging projection 21 and the overdentifier having the retainer 10 according to the present invention, it is possible to (1) maintain easy maintenance, (2) ③ Not only has excellent elasticity, but also excellent masticatory force. ④ It is possible to use a ball type attachment device for overdenture which minimizes the foreign body sensation even when the overdenture is not used.

In the retainer 10 according to the present invention, since the detachable portion 11 is made of an elastic material, the engaging projection 21 of the abutment 20 can be detachably engaged, So that excessive force may be applied to detachment, which may be inconvenient for use.

In order to prevent this, when the engaging protrusion 21 is inserted into the engaging groove 11a of the detachable portion 11, the engaging groove 11a may be resiliently pushed out of the engaging groove 11a, It is preferable that a predetermined clearance is provided on the facing surface in the vicinity of the exposed end (entrance) In the example shown in FIGS. 2A to 2D (a portion indicated by a red circle), the vicinity of the entrance of the fixing portion 12 is slightly widened to provide clearance, but it is also possible to provide a clearance by thinning the exposed end of the detachable portion 11 .

As another method for supplementing the elasticity of the desorption section 11, the convex end of the outer convex hemispherical portion of the desorption section 11 is partially horizontally sectioned to have more flexibility at that section ~ 2d). In this case, when the engaging projection 21 is inserted into the engaging groove 11a of the detachable portion 11, the engaging portion of the engaging groove 11a is resiliently pushed downward in the thinned upward direction, Can be easily detached, and a sufficient bonding force can be maintained when they are coupled.

In the present invention, the detachable part 11 is for imparting elasticity to the retainer 10 and is inevitably made of a material different from that of the fixing part 12, but when it is inserted into the fixing part 12 (Except when replacing with certain equipment for maintenance). To prevent the detachment of the inserted detachable portion 11 from the fixed portion 12, the detachable portion 12 is inserted into the outer surface of the detachable portion 11 and the inner surface of the receiving groove 12a corresponding thereto, It is preferable to form a predetermined engaging element for preventing the engaging portion 11 from falling off.

2E, one or a plurality of engaging groove-engaging jaws (engaging elements) are provided on the outer surface of the attaching / detaching portion 11 and on the inner surface of the corresponding engaging groove 12a of the securing portion 12 corresponding thereto will be.

Alternatively, a fixing protrusion 12b is formed on a part or all of the exposed end inner peripheral surface of the receiving groove 12a of the fixing portion 12 to prevent the exposed end portion of the insertion / detachable portion 11 from coming off will be. 2B, 2D, and so on, the inner circumferential surface of the exposed end 12a of the fixing portion 12 is divided by approximately 1/4, the fixing portion 12b is provided on the inner circumferential surface of the opposing portion, And can be inserted and fixed through a portion without the fixing jaw 12b.

10. Retainer
11. Desorption section 11a. Coupling groove 12. Fixing
12a. Receiving groove 12b. Fixed chin 12c. Step
20. Abortion
21. Coupling projection

Claims (7)

An attachment device of an implant-supported overdenture having an abutment formed with a ball-shaped engaging projection at an exposed end and a retainer detachably engaged with the engaging projection in a fitting manner,
The retainer
Wherein a concave hemispherical coupling groove corresponding to a ball shape of the coupling protrusion is formed so that the ball of the coupling protrusion is detachably inserted into the coupling protrusion so as to be detachably inserted into the convex hemisphere, A detachable portion of an elastically deformable material,
The over-dencheo and it is fixedly connected, and the removable portion inserted coupled to the receiving groove of the concave hemispherical shape is formed corresponding to the removable portion external shape government; it been made by, a portion of the removable part of the external entrance to the other side end is cut And a space is formed between the distal end and the receiving groove of the stationary section.

The method according to claim 1,
And the inlet diameter of the detachable portion coupling groove is smaller than the maximum diameter of the coupling protrusion ball.
3. The method according to claim 1 or 2,
And a predetermined clearance is formed on a surface of the detachable portion facing the vicinity of the exposed end of the fixing portion.
delete The method according to claim 1,
Wherein the fixing portion is made of a metal material.
The method according to claim 1,
Wherein a predetermined engaging element is formed on an outer surface of the detachable portion and an inner surface of the fixed portion receiving groove corresponding to the outer surface of the detachable portion so as to prevent detachment of the detachable portion.
The method according to claim 1,
Wherein a fixing jaw is formed on a part or the whole of the inner circumferential surface of the exposed end portion of the fixing portion to prevent the insertion / removal of the detachable portion from falling off.

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