KR101781087B1

KR101781087B1 - Zirconia implant fixture

Info

Publication number: KR101781087B1
Application number: KR1020150176222A
Authority: KR
Inventors: 엄상호
Original assignee: 엄상호
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2017-10-10
Also published as: KR20170069028A

Abstract

The present invention relates to an implant fixture made of a zirconia material having a housing made of titanium bonded to the inside thereof.
In order to solve this problem, according to the present invention, in the implant fixture inserted and fixed to the inside of the alveolar bone, a housing is inserted and fixed to the inside of the alveolar bone, Wherein the abutment and the housing are screwed together by an abutment fixing screw and the crown made of zirconia is coupled to the abutment of the abutment on the outer side of the abutment on the upper side of the abutment, The outer fixed housing is made of zirconia so that the titanium is not exposed to the outside, the outer type housing is made of titanium, and the outer type housing putting on the upper side is made of titanium, And the upper side of the implant fixture And a coupling hole extending through the center of the head portion and formed at a certain depth inwardly of the body portion, wherein the coupling hole is formed in the inner side of the insertion hole, The outer surface of the outer-type housing is made of the same titanium material so that a stable sealing can be made on the upper side of the outer-type housing, And an abutment fixing screw is screwed to the outer abutment screw through the coupling hole, and a crown made of zirconia is coupled to the outer abutment in the form of wrapping the outer abutment outer side, The upper side portion A is lower than the lower side portion B in order to securely insert and fix the periodontal bone Proposes a zirconia implant fixture, it characterized in that the interval is arranged to maintain a less than one-half.
The zirconia implant fixture according to the present invention is formed of a zirconia material for an implant fixture inserted and fixed to the inside of an alveolar bone, and a housing and an abutment for the inside of the alveolar bone are formed of titanium. The zirconia crown is further coupled to the outside of the abutment , The titanium is not exposed from the outside, so that the calculus and plaque are reduced and the esthetic feeling is improved.

Description

Zirconia implant fixture < RTI ID = 0.0 >

In the present invention, the implant fixture inserted and fixed to the inside of the alveolar bone is formed of zirconia, the housing and the abutment of the implant are formed of titanium, and the zirconia crown is bonded to the outside of the abutment, Which is capable of reducing plaque and plaque and improving aesthetics.

Dental implants have a healthy oral cavity through the placement of artificial teeth that can replace missing teeth. Common dentures or dentures commonly used have the disadvantage of bruising surrounding teeth and bones over time, but dental implants not only do not injure the surrounding dental tissue, but they also have cavities and function and shape similar to natural teeth Because it can be used semi-permanently, its use is increasing.

Thus, unlike general materials, the materials used to replace lost teeth, such as dental implants, are subject to many restrictions due to the special environment in the oral cavity. Namely, there are many problems such as a wet environment close to 100% relative humidity, high occlusal pressure generated during chewing, rapid temperature change, close contact with living tissue, frequent side effects such as hypersensitivity, The material for manufacturing an artificial tooth should be selected in consideration of the factors of the above.

In recent years, ceramics having excellent physical properties without discoloration, fracture and debris have been used in the long term. Especially, in order to improve the strength of ceramic materials having excellent aesthetic properties, glass penetration composites, CAD (computer aided design) computer-aided manufacturing (CAM) zirconia, and crystallized glass.

The CEREC system, originally designed by Mormann in the early 1990s, was the first to make copings by machining high-strength, high-purity zirconia with CAD / CAM. The zirconia Has a tenfold stronger physical property than porcelain porcelain porcelain, and has been attracting much attention because it is not easily broken even at high occlusal pressure generated during chewing.

Generally, zirconia means zirconium oxide, has high refractive index and high melting point, and is highly corrosion resistant. Among the ceramic materials used in dentistry, they have the highest strength and excellent aesthetics, and they are widely used as a substitute for teeth.

Such zirconia is excellent in biocompatibility and not only shows good biocompatibility to surrounding tissues, but also has high resistance to corrosion and is not toxic to living body, and is suitable for use as a dental prosthesis such as an implant fixture.

As shown in FIGS. 1 and 2, the dental implant prosthesis has a dental crown 6 made of zirconia and serving as a tooth, and a crown 6 embedded in the alveolar bone 1 for implantation A fixing screw 4 for joining the implant fixture 4 and the implant abutment 5 is further provided with an implant abutment 5 which is made up of the fixture 3 and which supports the dental crown 6, .

The crown 6 is made of zirconia having a white color and has a low esthetics due to its opacity but has sufficient mechanical strength. Therefore, even if the crown has a small thickness 'd', the crown 6 is less likely to be broken during use. And the implant fixture (4) were made of a titanium alloy material in order to secure a strong supporting force.

It has been found that the titanium can bind to bones and play a role of a root without harmful action in the human body, so that titanium metal is mainly used as a material of artificial teeth used worldwide.

However, since such an implant fixture 4 has a unique color of titanium, it has a problem that it is reflected on the gums after the implant surgery, or the implant fixture is directly exposed to the outside due to the gum disease, There was a high risk of gum disease by exacerbating tartar and plaque in the exposed titanium.

On the other hand, in the Utility Model Registration No. 0416306 (Dental Implant) (hereinafter referred to as Prior Art 1), a technique of constructing a single dental implant as a single zirconia ceramic by simplifying the structure was proposed. Patent Registration No. 1137013 A method of manufacturing a zirconia implant member, and a dental zirconia implant member using the same) (hereinafter referred to as Prior Art 2), injection molding is performed by mixing zirconia powder and a binder, and a series of post-treatment processes are performed to form an abutment and a fixture together An implant member is proposed.

However, since the prior art 1 and the prior art 2 are composed of one body as a whole, the implant fixture (or the implant member) can not but protrude to the upper side of the gingule at a certain height. As a result, So that it can be applied only when the alveolar bone is hard.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an implant fixture which is formed by a zirconia material and inserted into the alveolar bone, The object of the present invention is to provide a zirconia implant fixture in which crown is combined and titanium is not exposed to the outside, thereby reducing tartar and plaque and improving aesthetics.

The zirconia implant fixture according to the present invention is characterized in that the implant is fixedly inserted into the alveolar bone by inserting the housing into the implant fixture and the abutment is seated on the upper side of the housing and the abutment and the housing are screw- And a crown made of zirconia is wrapped around the periphery of the periphery of the abutment, wherein the implant fixture is made of zirconia so that the titanium is not exposed to the outside, and the external type housing and the The outer housing is made of titanium. The outer housing has a hexagonal head, a support portion that is seated on the seating groove formed on the upper side of the implant fixture, and a support portion extending downward from the support portion A body portion inserted into the insertion hole, And a coupling hole formed at a predetermined depth to the inside of the body portion while penetrating through the center of the head portion, the insertion hole being inserted into the insertion hole of the implant fixture coated with the cement- And an abutment fixing screw is screwed on the outer abutment housing and the abutment abutment on the outer abutment through the abutting hole so that the abutment fixing screw is screwed on the outer abutment abutment, In the upper part, a crown made of zirconia is bonded in the form of wrapping around the outer abutment. In order to firmly fix the implant to the periodontal bone, the upper part (A) The present invention is characterized by its technical features.

The zirconia implant fixture according to the present invention is formed of a zirconia material for an implant fixture inserted and fixed to the inside of an alveolar bone, and a housing and an abutment for the inside of the alveolar bone are formed of titanium. The zirconia crown is further coupled to the outside of the abutment , The titanium is not exposed from the outside, so that the calculus and plaque are reduced and the esthetic feeling is improved.

1 is a cross-sectional view of a conventional zirconia implant,
Fig. 2 is an exploded perspective view of Fig. 1,
Fig. 3 is a perspective view showing the outer shape of the zirconia implant fixture according to the first embodiment of the present invention,
FIG. 4 is an exploded perspective view of FIG. 3,
5 is a cross-sectional view of Fig. 3,
Fig. 6 is a plan view of Fig. 3,
FIG. 7 is an exploded view of an implant prosthesis to which the zirconia implant fixture of FIG. 3 is applied,
8 is a second embodiment of the present invention, which is a combined perspective view of an inner-type zirconia implant fixture,
Fig. 9 is an exploded perspective view of Fig. 8,
10 is a cross-sectional view of Fig. 8,
11 is an exploded view of an implant prosthesis to which a zirconia implant fixture according to the present invention is applied,
12 is a view showing a manufacturing process of an implant prosthesis to which a zirconia implant fixture according to the present invention is applied.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention proposes an implant fixture formed of zirconia for an implant fixture which was formed of titanium.

Generally, an implant fixture is divided into an external type implant fixture composed of an external type housing and an external type abutment, and an internal type implant fixture composed of an internal type housing and an internal type abutment , The present invention is commonly applied to an external type and an internal type, which will be described in detail for the first embodiment and the second embodiment.

3 to 5 and FIGS. 8 to 10, the implant fixture 120, which is inserted and fixed to the inside of the alveolar bone 1, is made of a zirconia material. The zirconia implant fixture 120, An outer type housing 110 or an inner type housing 110 made of titanium is closely inserted into the insertion hole 122 formed at the center of the upper portion of the implant fixture 120.

Particularly, the housing 110 (110a) has a polygonal cross-section so as not to flow or rotate after being inserted into the implant fixture 120, and the coupling angle between the housing 110 (110a) and the implant fixture 120 The cement-type adhesive is applied to the inner surface of the insertion hole 122, and then the housing 110 and the housing 110a are coupled.

The outer housing 110 includes a head portion 111 having a hexagonal shape and a support portion 112 which is seated in the seating groove 123 formed on the upper side of the implant fixture 120, A body portion 114 extending downward from the support portion 112 and inserted into the insertion hole 122 and a body portion 114 extending through the center of the head portion 111 and extending to the inside of the body portion 114 at a predetermined depth And a coupling hole 113 formed therein.

The support 112 may be formed to protrude from the upper surface of the implant fixture 120 without being separately formed in the implant fixture 120, It is preferable that the upper portion A of the implant fixture 120 maintains a pitch interval of 1/2 or less as compared with the lower portion B. [

On the other hand, zirconia is not easily processed compared to conventional titanium materials, and if the diameter of the insertion hole 122 is too large, there is a high possibility that the zirconia is broken during processing. Therefore, when the implant fixture 120 is made of zirconia 6, the diameter of the body part 114 inserted into the implant fixture 120 in the external type housing 110, the size 'B' of the head part 111, The diameter 'A' of the coupling hole 113 formed at the center of the coupling hole 114 should be appropriately adjusted.

That is, in the present invention, since the implant fixture 120 has a structure in which the housing is inserted therein, high toughness is required. In an embodiment of the present invention, the implant fixture 120 is made of pseudocubic zirconia (pseudo-cubic zircornia).

The toughness (toughness) means the degree of toughness against fracture of a material. It is represented by the energy per unit volume applied to the fracture, and not only the stress required for fracture is large, but also the amount of strain A composite material which is large, has a large absorption energy and is strong in toughness, and generally has a combination of two materials having different characteristics, has a high toughness.

Cubic zirconia (Zirconia), which improves the strength of zirconia, is used as a raw material for strengthening strength and ductility by using zirconium oxide as a raw material. (Cubic zirconia) with a completely cubic structure (a = c) does not exhibit low-temperature deterioration characteristics.

However, since cubic zirconia having a perfect cubic phase has poor physical properties (bending strength and fracture toughness), there is a problem that many cracks and chips are generated during machining and precise machining is impossible, so that it can not be used for the implant fixture of the present invention.

The present invention proposes, as a preferred embodiment, an implant fixture to which pseudo-cubic zirconia is applied in order to solve the above-mentioned problems in zirconia and cubic zirconia.

The pseudocubic zirconia is produced by patent registration No. 1335761 (zirconia single crystal having no low-temperature deterioration characteristic and its growing method).

At this time, the upper zirconia single crystal is characterized by being a single crystal having a t'-phase whose crystal structure is nearly cubic, and this t'-phase is often called a pseudo-cubic The reason is that the crystal structure is almost the same as cubic.

That is, the pseudocubic zirconia of the present invention is prepared by mixing 37.44 kg of ZrO 2 powder having a purity of 99.99% and 2.56 kg of Y 2 O 3 powder having a purity of 99.99% as a raw material, making a seed from the raw material uniform at the initial stage of crystal growth, crystal, and the composition ratio of the raw materials is preferably in the range of 95 to 93 wt% of ZrO 2: 5 to 7 wt% of Y 2 O 3. Hereinafter, a detailed description of the method of growing and manufacturing the same will be omitted.

The pseudocubic zirconia of the present invention produced according to the above method exhibited a very high value of 170.6 Kgf / mm ² and had a hardness of 1,200 to 1,300 Hv, physical properties of fracture toughness of 11.5 ~ 14.5 MPa, was a value withstand Applying pressure until the sample is broken bending strength is 160 ~ 180 kgf / mm ^2, specific gravity appeared to 6.10 ~ 6.15 g / cm ^3, notably as compared with the conventional product Respectively.

In particular, the fracture toughness and bending strength are about twice as good as those of the world's highest level of cubic zirconia products (fracture toughness of 6.7 MPa and bending strength of 100 Kgf / mm ^{2 in} Kyocera Japan).

7, an outer abutment 130 is seated on the upper side of the outer housing 110, and a coupling hole 113 formed on the upper side of the outer housing 110 is coupled to an outer abutment The outer abutment fixing screw 131 is threadedly coupled with the outer abutment abutment 130 and the crown 140 made of zirconia is provided on the outer abutment abutment 130, And the outer abutment 130 is coupled to the outer abutment 130 in a manner to surround the outer abutment.

At this time, the outer abutment 130 is made of titanium, and the outer abutment 130 can be stably sealed with the outer housing 110 made of the same material.

The jig 150 is inserted into the through hole 141 of the crown 140 and then filled with a resin 160. The GP cone 150 is a solid synthetic resin recharging substitute, When the upper side resin 160 is scratched after maintenance or replacement, the abutment 150 is removed and the abutment fixing screw 131 can be easily dismantled.

The upper portion of the coupling hole 141 may be sealed with a cylindrical zirconia closure member (not shown) having the same diameter as the coupling hole 141 after filling the resin 160 to form a cleaner appearance .

8 to 10, the implant fixture 120 inserted and fixed to the inside of the alveolar bone 1 is made of a zirconia material, and the implant fixture The inner housing 110a made of titanium is tightly inserted and inserted into the insertion hole 122 formed in the upper center portion of the inner housing 120a.

At this time, the length of the inner housing 110a is maintained at 50 to 80% of the depth of the insertion hole 122 formed in the implant fixture 120 so that the tip of the inner abutment 130a is inserted into the insertion hole 122 Respectively.

Particularly, the inner housing 110a has a hexagonal cross-section of the body, is inserted into the insertion hole 122 and is prevented from rotating after the insertion, and the upper side of the inner housing 110a has an engagement groove And a coupling hole 113a formed at a predetermined depth from the lower side of the coupling groove 111a to the inside of the body.

11, an inner abutment 130a is seated on the upper side of the inner housing 110a, and a coupling hole 113 formed on the upper side of the inner housing 110a is provided with an inner abutment And a crown 140 made of zirconia is provided on the upper side of the inner abutment 130a. The abutment fixing screw 131 is screwed into the inner abutment 110a and the inner abutment 130a, And is coupled in the form of wrapping the outer side of the inner abutment 130a.

The outer type zirconia implant prosthesis according to the present invention is manufactured by the following process shown in FIG. (Manufacturing process for internal type zirconia implant prosthesis is omitted)

First, the zirconia mold is processed to fabricate the zirconia implant fixture 120. In one embodiment of the present invention, the pseudocubic zirconia single crystal is cut by a separate processing tool to produce the implant fixture 120, An insertion hole 122 is formed at the center of the zirconia implant fixture 120. (S10)

A supporting portion 112 which is seated and connected to a seating groove 123 formed on the upper side of the implant fixture 120 and a supporting portion 112 which is formed on the lower side of the supporting portion 112, And a coupling hole 113 formed at a predetermined depth inward of the body part 114 while passing through the center of the head part 111. The body part 114 is inserted into the body part 114, 110 are formed. (S20)

The body portion 114 of the external type housing 110 is inserted into the insertion hole 122 of the zirconia implant fixture 120. (S30)

Next, the crown 140 is formed (S40), the outer abutment 130 is seated on the upper side of the housing 110 (S50), and the outer abutment 110 and the outer abutment After the abutment 130 is screwed (S60), the crown 140 is coupled (S70) so as to cover the outer side of the abutment 130.

Finally, the implant 150 is inserted into the through hole 141 of the crown 140 (S80), and then the resin 160 is filled (S90).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. will be.

1: alveolar bone 2: gums
3: Fixture 4: Set screw
5: Implant abutment 6: Crown
110: outer housing 111: head
112: Support portion 113, 113a: Coupling hole
114:
110a: Inner type housing 111a: Coupling groove
120: Implant fixture 121: Adhesive
122: insertion hole
130: External abutment 131: abutment fixing screw
130a: internal abutment
140: Crown 141: Through hole
150: Jiekikon 160: Resin

Claims

The implant is fixed to the inside of the alveolar bone by inserting the housing into the implant fixture, and the abutment is fixed to the upper side of the housing. The abutment and the housing are screwed together by the abutment fixing screw, and the upper part of the abutment is made of zirconia In an implant fixture in which crown is wrapped around the periphery of the abutment,
The implant fixture 120 is made of zirconia so that the titanium is not exposed to the outside, and the external type housing 110 and the external abutment 130 which is seated on the upper side thereof are made of titanium,
The outer housing 110 has a hexagonal head 111, a support 112 that is seated in the seating groove 123 formed on the upper side of the implant fixture 120, And a coupling hole 113 penetrating the center of the head part 111 and formed at a predetermined depth inward of the body part 114. The body part 114 is inserted into the insertion hole 122, And a coupling angle is perpendicularly inserted into the insertion hole 122 of the implant fixture 120 to which the cement-type adhesive is applied,
An outer abutment 130 made of the same titanium material is seated on the upper portion of the outer housing 110 so as to enable stable sealing,
The abutment fixing screw 131 is screwed to the outer abutment housing 110 and the abutment abutment 130 through the coupling hole 113. A crown 140 made of zirconia is formed on the abutment abutment 130, Is coupled to the outer abutment 130 to surround the outer abutment 130,
Wherein the implant fixture (120) is configured such that the upper portion (A) maintains a pitch interval of 1/2 or less as compared with the lower portion (B) for firm insertion and fixation on the periodontal bone.

The method according to claim 1,
The zirconia used for the implant fixture 120 may be prepared by mixing a raw material in which the composition ratio of the raw material is within a range of 95 to 93 wt% of ZrO2: 5 to 7 wt% of Y2O3, The crystal structure is composed of a pseudo-cubic zirconia having a single crystal structure close to cubic, and has a fracture toughness of 11.5 to 14.5 MPa and a bending strength of 160 to 180 kgf / mm ² Wherein the zirconia implant body is made of a zirconia material.

The implant is fixed to the inside of the alveolar bone by inserting the housing into the implant fixture, and the abutment is fixed to the upper side of the housing. The abutment and the housing are screwed together by the abutment fixing screw, and the upper part of the abutment is made of zirconia In an implant fixture in which crown is wrapped around the periphery of the abutment,
The implant fixture 120 is made of zirconia so that the titanium is not exposed to the outside and the insert hole 122 formed at the center of the upper portion of the implant fixture 120 is provided with an internal type housing 110a made of titanium, Is inserted and fitted,
The inner housing 110a has a hexagonal cross section and is inserted into the insertion hole 122 and prevented from rotating. The upper housing has an engagement groove 111a in which a hexagonal thread portion of the inner abutment 130a is seated. And a coupling hole 113a formed at a predetermined depth from the lower side of the coupling groove 111a to the inside of the body,
An inner abutment 130a made of the same titanium material is seated on the upper portion of the inner housing 110a so as to enable stable sealing,
The abutment fixing screw 131 is screwed to the inner housing 110a and the inner abutment 130a through the coupling hole 113a and a crown 140 made of zirconia is formed on the inner abutment 130a, Is coupled in a form to surround the outer side of the inner abutment 130a,
The length of the inner housing 110a is maintained at 50 to 80% of the depth of the insertion hole 122 formed in the implant fixture 120 so that the tip of the inner abutment 130a is inserted into the insertion hole 122 Is inserted into the zirconia implant body.

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