KR20180003080A - Sustainable Overdenture system - Google Patents

Abstract

The present invention relates to a semi-permanently sustainable overdenture system. The present invention provides the semi-permanently sustainable overdenture system, which closely couples an abutment, planted on gums of a patient and a housing installed in a denture by an elastic gold ring to have excellent retention force and stability while being attachable and detachable. The present invention comprises: the abutment coupled to a fixture installed in alveolar bone of the patient; the housing fixated to the overdenture integrally to be fit-coupled to the abutment; and the elastic gold ring inserted into the housing to be coupled to the abutment and having one side cut to have an opening. The abutment includes: a body unit screw-coupled to the fixture; a coupling unit formed at an upper end of the body unit to have a convex shape and a neck unit formed integrally between the coupling unit and the body unit. The housing includes: a first housing forming an insertion hole into which the coupling unit and the neck unit of the abutment and the elastic gold ring are inserted; and a second housing fitted into the insertion hole of the first housing to prevent separation of the elastic gold ring.

Description

[0001] Sustainable Overdenture System [

The present invention relates to an overdenture system that is semi-permanently usable. The abutment implanted in the patient's gums and the housing provided in the overdenture are tightly coupled so as to be detachable by the resilient gold ring, To a semi-permanently usable overdenture system.

Due to the global trend of population aging, there is a growing interest in improving health and quality of life, and medical welfare policies are becoming a major social issue.

The global medical device market is also growing steadily due to this social trend, and the domestic medical device industry is also growing rapidly as a universal design product that improves the quality of life, such as an aging of population structure, an increase in demand for chronic diseases and beauty treatment, As the elderly population increases, the population that needs dentures is steadily increasing.

Implant procedure is a substitution technique that restores when the tissue of the human body is lost. However, in dentistry, implantation of an artificial tooth root, tooth root, is implied. It is a state-of-the-art technique that restores the tooth function by implanting an artificial root made of titanium or the like which does not have a rejection reaction in the human body to replace the root of the lost tooth. In the case of general prostheses or dentures, the surrounding teeth and bones are damaged over time, but the implants do not injure the surrounding dental tissue, and they have the same function and shape as the natural teeth and do not have cavities. have.

However, since such an implant procedure is based on the principle that the teeth are placed as many as the number of missing teeth, if a large number of teeth are lost, it takes a considerable expense and time to replace them with the implants. If the amount of remaining gum bone is insufficient There is a problem that it is difficult to perform the procedure.

In recent years, in order to overcome the disadvantages of the conventional denture procedure in which there is no structure for supporting the chewing force of the food other than the gums and the retention force and the supporting force are deteriorated, and to overcome the problem of the above- Overdenture systems are widely used.

The overdenture system, that is, the implant-supported denture, unlike a normal denture, inserts a prosthesis (implant) to fix the denture between the gums, fixes the denture to the prosthesis, strengthens the adhesive force between the denture and the gum, ). In case of edentulous patients, there is a burden of placing 24 implants in total for implantation. However, implant denture is over-denture method, which is about 2 ~ 4 upper and lower, total 4 ~ 8 The implant is fixed, and the rest is made into a denture, and the denture and the implant are fixed using a strong magnet, so that the burden of the cost is low and the patient has a very high preference.

Conventional overdenture systems used mainly in domestic and overseas are mainly used to fix dentures to the gum rests using magnets, rubber, balls, etc. In other words, a plurality of prostheses are implanted in the patient's gum, Rubber, ball, etc., and the denture is fixed so as to be removable / attachable to the prosthesis implanted in the gum, so that the user can freely remove the denture while securing the holding force between the denture and the denture .

As described above, in the conventional overdenture system, the denture and the prosthesis are mostly secured by the magnet, the rubber, the ball and the like, but the retentivity and the stability can not be secured in this manner There are various problems such as a decrease in patient's satisfaction in use.

Registration Utility Model Registration Bulletin Registration Number 20-0473225 (2014.06.11)

SUMMARY OF THE INVENTION It is an object of the present invention to provide an abutment which can be permanently attached to an abutment to be inserted into a gum of a patient and a housing provided on a denture by a resilient gold ring, System.

The present invention relates to an implant coupled to a fixture provided on an alveolar bone of a patient, A housing fixed integrally with the overdentifier and fitted to the attachment; And an elastic gold ring inserted into the housing and coupled to the attachment and having one side cut out and having an opening, the attachment comprising: a body part screwed to the pick stewer; And a neck portion integrally formed between the engaging portion and the body portion. The housing includes a first housing having an insertion hole for inserting an engaging portion of the attachment, a neck portion, and an elastic gold ring, And a second housing fitted to the insertion hole of the first housing to prevent the elastic metal ring from being separated from the second housing.

The present invention has a structure in which the attachment and the housing are joined and separated by the elastic gold ring, so that maintenance of the overdenture can be easily performed.

According to the present invention, since the attachment groove is formed in the attachment, not only the attachment to the fixture is fastened, but also the attachment can be fastened by a certain fastening force.

In the present invention, the attachment portion of the attachment has a bell shape, and the elastic gold ring is installed so as to be in close contact with the joint portion and the neck portion, thereby compensating for the attachment angle of the attachment.

In the present invention, the elastic gold ring is brought into close contact with the engaging portion and the neck portion while maintaining a proper tension, thereby preventing damage due to fracture and enabling stable attachment and detachment of the housing.

The present invention can be used semi-permanently because it has an excellent holding force and a supporting force by the combination of the abutment, the elastic gold ring and the housing.

In the present invention, the elastic gold ring is coupled to be positioned at the maximum diameter portion of the coupling portion, and the tapered inclined surface of the housing is contactably supported on the bending support surface of the body of the attachment, By dispersing the load, the overdenture is prevented from being separated by the load.

The present invention is advantageous in that the resilient gold ring is inserted and seated between the first and second housings to which the elastic gold ring is detachably coupled, so that the elastic gold ring can be easily assembled and installed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 2 is a view showing an example of a configuration according to the present invention
3 is an exemplary view showing the internal configuration of the coupled state according to the present invention.
4 is an exemplary diagram showing the configuration of an attachment according to the present invention.
5 is an exemplary view showing a configuration of a first housing according to the present invention;
6 is an exemplary view showing a configuration of a second housing according to the present invention.
7 is an exemplary view showing the configuration of an elastic gold ring according to the present invention
FIG. 8 is a graph showing the contrast of a microscope photograph according to Example 2 of the present invention

FIG. 3 is an exemplary view showing an internal structure of a combined state according to the present invention, and FIG. 4 is a sectional view showing the internal structure of the combined state according to the present invention. FIG. 5 is an exemplary view showing a configuration of a first housing according to the present invention, FIG. 6 is an exemplary view showing a configuration of a second housing according to the present invention, and FIG. 7 is a view illustrating an example of a configuration of an elastic gold ring according to the present invention,

The present invention relates to an implant (10) coupled to a fixture provided on an alveolar bone of a patient;

A housing 20 integrally fixed to the overturner 100 and fitted to the attachment 10;

A resilient gold ring 30 inserted into the housing 20 and coupled to the attachment 10 and having one side cut open to provide an opening,

The attachment 10 includes a body 11 screwed to the pick stewer, a coupling part 12 formed at the upper end of the body part in a biconvex shape, a coupling part 12 and a body part 11, And a neck portion (13) integrally formed between the outer peripheral surface

The housing 20 includes a first housing 40 in which an insertion hole 41 is formed so as to insert the coupling portion 12 of the attachment, the neck portion 13 and the elastic gold ring 30, And a second housing (50) fitted in the insertion hole (41) to prevent the elastic metal ring (30) from coming off.

The attachment 10 is formed integrally with the engaging portion 12, the neck portion 13, and the body portion 11.

A neck portion 13 and an engaging portion 12 are connected to an upper end of the body portion 11 and a thread 14 screwed to a fixture A curved support surface 17 formed of a curved surface is formed.

The bending support surface 17 is provided with a function of compensating for the angle of installation of the attachment 10 and the fixture (not shown). The bending support surface 17 has a curved surface extending downward from the lower end of the neck 13, (11).

The lower end of the housing is contacted and supported by the curved support surface 17 when a load is generated in the coupling of the overture or the overdenture and the housing is coupled at a predetermined inclination angle by a curved shape extending downward from the lower end of the neck 13 , The housing is stably supported and the load transferred from the overdenture is dispersed.

The engaging portion 12 is located at the upper end of the attachment, and the outer surface is formed so as to be convex so as to have a bell shape.

The coupling portion 12 has a coupling groove 16 formed at a predetermined depth to facilitate fastening of the attachment to the fixture (not shown) on the upper surface 15. In other words, the conventional attachment 10 is directly held and fixed to a fixture by a doctor. However, the attachment 10 of the present invention is not limited to a polygon (not shown) in which a fastening mechanism such as a dental wrench can be fitted, The fastening groove 16 on the upper surface 15 of the attachment engaging portion 12 is formed at a predetermined depth so that the attachment can be easily fastened to the fixture, .

The neck portion 13 is formed to extend from the engaging portion 12 to the bending support surface 17 of the body portion and is formed to have a concave curved surface extending from the outer surface of the engaging portion 12 having a bell- have.

It is preferable that the minimum diameter D2 of the neck portion 13 is formed to be 2/3 to 7/8 of the maximum diameter D1 of the coupling portion.

The engaging portion 12 and the neck portion 13 have a function of dispersing the transferred load in the left and right direction by the elastic gold ring when the elastic gold ring 30 is coupled and a load is generated from the overdenture. That is, the engaging portion 12 and the neck portion 13 have a function of improving the bearing capacity of the overdenture by engagement with the resilient gold ring 30.

The housing 20 is formed by combining the first housing 40 and the second housing 50. The first housing 40 is provided with the second housing 50 and the elastic gold ring 30, An insertion hole 41 into which the engaging portion 12 and the neck portion 13 of the trunk portion are inserted is formed.

The insertion hole 41 includes an upper engagement hole 42 into which the elastic gold ring 20 is inserted and the second housing 50 is fitted and an elastic gold ring 30 End insertion hole 43 having an inner diameter D6 smaller than the inner diameter D5 of the upper insertion hole so as to prevent the separation of the upper insertion hole.

That is, the insertion hole 41 is formed so that the upper insertion hole 42 and the lower insertion hole 43 having different diameters are connected to each other, and the insertion hole 41 is opened Respectively.

The lower insertion hole 43 is formed with a tapered inclined surface 44 along the lower circumference and the inclined surface 44 has a predetermined inclination corresponding to the curved support surface 17 of the trunk portion.

The inner diameter D6 of the lower insertion hole is formed to be larger than the maximum diameter D1 of the coupling portion so that the engagement portion 12 of the attachment can be inserted through the lower insertion hole 43. [

The support groove 45 is formed in the outer surface of the first housing 40 along the circumference of the first housing 40. When the support groove 45 is engaged with the overdenture, (40) are firmly integrated with each other. At least one such support groove 45 is formed.

The second housing 50 is inserted into the upper insertion hole 42 of the first housing to assemble the elastic gold ring 30 into the upper insertion hole 42 and the elastic gold ring 30 inserted into the upper insertion hole 42, Thereby preventing the ring 30 from coming off.

The second housing 50 includes a lower end portion 51 having an engaging groove 53 which is fitted into the upper end insertion hole 42 of the first housing and is opened downwardly, 1 upper end portion 52 that is in contact with the upper end 46 of the housing.

That is, the lower end portion 51 of the second housing 50 is inserted into the upper end insertion hole 42 of the first housing until the upper end portion 52 of the second housing 50 is in contact with the upper end 46 of the first housing, When the first and second housings 40 and 50 are fitted to each other, the end 54 of the lower portion of the second housing and the inner surface 47 of the insertion hole of the first housing, which are located in the upper insertion hole 42 of the first housing, A ring seating space 60 in which an elastic gold ring is located is formed.

The lower end portion 51 of the second housing has an outer diameter D7 substantially equal to the inner diameter D5 of the first housing upper insertion hole and the inner diameter D8 of the coupling groove 53 formed at the lower end portion has a maximum diameter (D1).

The elastic gold ring 30 is coupled to the abutment while maintaining a predetermined tension, and provides a tilting function so that the load transmitted to the housing is dispersed. That is, the elastic gold ring 30 is coupled between the engagement portion 12 of the attachment and the neck portion 13, preferably below the maximum diameter portion of the engagement portion.

The elastic gold ring 30 is formed in a C shape having one side cut out and having an opening 31.

The opening 31 serves to provide elastic deformation when engaged with the abutment 10. When the engaging portion 12 of the abutment 10 is inserted and engaged with the abutment 10, And a function to make the housing 20 having the elastic gold ring 30 inserted therebetween and the abutment 10 to be fitted to each other while allowing the elastic gold ring 30 to come into close contact with the engaging portion 12 while being slightly widened.

In addition, since the elastic gold ring 30 according to the present invention is limited to gold (gold), the material limitation affects the retention force of the present invention, so that it is preferable that the material is limited to gold.

The coupling part 12 and the neck part 13 of the first and second housings 40 and 50 and the elastic gold ring 20 and the attachment 10 are provided with predetermined assembly tolerances, The range of assembly tolerance is omitted in the description of the present invention.

According to the present invention configured as above, the elastic gold ring is inserted into the upper insertion hole of the first housing, the housing is assembled by inserting the second housing into the upper insertion hole into which the elastic gold ring is inserted, A plurality of housings are integrally fixed to the overdenture.

The attachment is fixedly coupled to a fixture provided on the alveolar bone of the patient by a screw thread formed at the lower end, and the same number of the housing and the attachment are installed.

When the overdenture is coupled to the insertion hole of the housing installed in the overdenture, that is, the coupling portion of the attachment into the lower insertion hole of the first housing, the coupling portion of the attachment is inserted through the lower insertion hole of the housing And is fitted to the elastic gold ring. That is, the housing and the attachment are not fitted together and separated.

At this time, the lower end of the housing, that is, the tapered inclined surface 44 of the lower insertion hole 43 comes close to or comes into contact with the bending support surface 17 of the abutment body, and the elastic gold ring is brought into close contact with the joint portion and the neck When the load is transmitted to the housing through the overdenture, the housing is slid (tilted) in the lateral direction by the tension of the elastic gold ring, and the load is dispersed by the tilting operation.

Hereinafter, the present invention will be described in detail with reference to the following examples.

Example 1

Accelerated Life (Fatigue) Test

1) Test equipment

- Fatigue tester (8871, Instron, U.S.A.)

- Torque gauge (HTG2-200Nc, IMADA, Japan)

2) Test method

The fixture and the abutment were fastened with a screw at a predetermined torque (30 N · cm), and then a housing with an elastic gold ring was attached. Using a jig for fixing the specimen, the load direction was set to be inclined at 30 ° with the specimen , The specimen was fixed to the jig so that the distance from the fixed point to the load point was about 11 mm, and then the fatigue test was performed by the universal joint method.

The fatigue test was carried out under the conditions of 20 ° C ± 5 ° C and the test cycle of 14Hz. The fatigue load was subjected to the fatigue test at 80% of the average shear compressive strength according to ISO 14801: 2007, Respectively. In this case, the load at the end of 5 × 10 ⁶ cycles was fatigued, and the results are shown in Table 1 below.

[Table 1]

As shown in [Table 1], it can be seen that the failure cycle of the present invention is 10,000 times or more for the load value (300N to 800N), and the fatigue of the over- Considering 5,000 ~ 6,000 turns, it can be seen that it has very good holding power.

Example 2

Before and after the fatigue test of the specimen 7 according to Example 1 was observed under a microscope, and the results are shown in [Figure 8] and [Table 2]. 8 (a) shows a microscope photograph before the test, and (b) shows a microscope photograph after the test.

[Table 2]

Example 3

Test pieces 7 to 9 according to Example 1 were tested for retention force before and after fatigue test, and the results are shown in Table 3 below.

[Table 3]

It can be seen from the above Examples 1 to 3 that the present invention has almost no difference in dimensional change and retentivity between before and after the fatigue test and that the present invention has excellent retentivity and stability, As shown in FIG.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): an attachment (11): a body
(12): engaging portion (13): neck
(14): Thread (15): Top surface
(16): fastening groove (17): bending support surface
(20): housing (30): elastic gold ring
(31): opening (40): first housing
(41): insertion hole (42): upper insertion hole
(43): lower insertion hole (44): tapered inclined surface
(45): Support groove (46): Upper
(47): insertion hole inner surface (50): second housing
(51): lower end portion (52): upper end portion
(53): engaging groove (54): end
(60): ring seating space (100): overturner
(200): Gums

Claims (8)

An implant portion (10) coupled to a fixture provided on the alveolar bone of the patient;
A housing 20 integrally fixed to the overturner 100 and fitted to the attachment 10;
A resilient gold ring 30 inserted into the housing 20 and coupled to the attachment 10 and having one side cut open to provide an opening,
The attachment 10 includes a body 11 screwed to the pick stewer, a coupling part 12 formed at the upper end of the body part in a biconvex shape, a coupling part 12 and a body part 11, And a neck portion (13) integrally formed between the outer peripheral surface
The housing 20 includes a first housing 40 in which an insertion hole 41 is formed so as to insert the coupling portion 12 of the attachment, the neck portion 13 and the elastic gold ring 30, And a second housing (50) fitted in the insertion hole (41) to prevent the elastic metal ring (30) from coming off.
The method of claim 1,
Wherein the trunk part (11) is formed with a curved supporting surface (17) at a portion connected to the neck part (13).
The method of claim 1,
Wherein the engaging portion (12) is formed with a coupling groove (16) at a predetermined depth on the top surface (15).
The method of claim 1,
The first housing 40 is formed with an insertion hole 41 into which the second housing 50, the elastic gold ring 30, the coupling portion 12 of the body and the neck portion 13 are inserted,
The second housing 50 includes a lower end portion 51 having an engaging groove 53 which is fitted into the upper end insertion hole 42 of the first housing and is opened downward and a lower end portion 51 formed integrally with the lower end portion 51, And a top portion (52) that is in contact with the top (46) of the housing (1).
The method of claim 4,
The insertion hole 41 includes an upper engagement hole 42 into which the resilient gold ring 20 is inserted and the second housing 50 is fitted and an elastic gold ring 30 communicated with the upper insertion hole 42, And a lower insertion hole (43) having an inner diameter (D6) smaller than an inner diameter (D5) of the upper insertion hole to prevent separation of the upper insertion hole (43).
The method of claim 5, further comprising:
Wherein the lower insertion hole (43) is formed with a tapered inclined surface (44) along the lower circumference thereof.
The method of claim 4,
When the second housing is fitted into the insertion hole of the first housing, a ring seating space 60 in which an elastic gold ring is positioned between the end 54 of the lower end of the second housing and the inner surface 47 of the insertion hole of the first housing, Is formed on the upper surface of the overdenture system.
The method of claim 4,
The lower end 51 of the second housing has an outer diameter D7 substantially equal to the inner diameter D5 of the first housing upper insertion hole and the inner diameter D8 of the coupling groove 53 formed at the lower end has a maximum diameter RTI ID = 0.0 > D1). ≪ / RTI >

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