KR20190070019A - Cap for deciduous tooth with internal protrusion based on zirconia - Google Patents

Abstract

The present invention relates to a deciduous tooth prosthesis having an inner protrusion based on zirconia. The deciduous tooth prosthesis of the present invention comprises: a deciduous tooth prosthesis body (110) formed by molding a deciduous tooth shape, inserting a deciduous tooth into a lower portion thereof through an opening (120), and having an inner protrusion (130) of an uneven shape formed in a horizontal direction, integrally formed therein and made of a zirconia material; and an opening (120) formed to be within a preset error range with an inner diameter equal to an outer diameter of the diameter of a lower end edge of the deciduous tooth to be covered by a deciduous tooth prosthesis (100). Accordingly, an adhesive is input between the deciduous tooth prosthesis and a tooth to widen an adhesive area during bonding by including the inner protrusion. Also, the deciduous tooth prosthesis has physical resistance to resist by vertical force, thereby being not easily separated from the tooth, and improving folding strength and rupture strength in addition to tensile strength from the attached deciduous tooth.

Description

Cap for deciduous tooth with internal protrusion based on zirconia < RTI ID = 0.0 >

More particularly, the present invention relates to an inner tube having a zirconia-based inner protrusion, and more specifically, by providing an inner protrusion, an adhesive is interposed between the inner tube and the tooth to enlarge the bonding area at the time of bonding, And a zirconia-based inner protrusion for preventing the tooth from being easily separated from the tooth by being held by upper and lower forces.

Pediatric prosthodontic tube is a procedure that restores the crown of a tooth that is severely damaged by dental caries or trauma. If the retained tube restoration is not treated in time, the surrounding teeth will be pushed to the missing position and the permanent tooth will not be able to come out later. Therefore, a device or restoration should be provided to maintain the missing position until the permanent tooth is removed.

Although the tube has been made of metal and resin to date, it does not satisfy strength and aesthetics at the same time, discoloration and fracture occur due to color stability and strength decrease, and it is disadvantageous in aesthetically not good in the upper anterior portion as an esthetically important region .

To solve these drawbacks, zirconia is used as an inlet tube, and zirconia is a bioceramic material having excellent strength and biocompatibility.

However, since the roughness is small, it is difficult to adhere to the teeth. To solve this problem, conventionally, the sandblasting is manually performed manually on the inner surface of the insert, but in this case, it takes a long time. In addition to the sandblasting, the pretreatment agent and high- There has been a problem that high cost is caused by using resin cement.

Korean Patent Application No. 10-2011-0034464 "DENTAL PROSTHESIS COATED ANTIBIOTIC" Korean Patent Laid-Open Publication No. 10-2017-0120787 entitled " DENTURE BASE AND MOLD, AND DENTAL RESIN MATERIAL " Korean Patent Application No. 10-2009-0108053 "CROWN FOR TOOTH"

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an internal protruding portion, in which an adhesive is inserted between the inlet tube and the teeth to widen the adhesive area at the time of bonding, And a zirconia-based inner protrusion for preventing the inner tube from being easily separated from the inner tube.

In addition, the present invention is to provide a tube having a zirconia-based inner protrusion for enhancing the end-effect stress and the burst strength in addition to the tensile strength from the attached die.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the above object, according to an embodiment of the present invention, a greenhouse having a zirconia-based inner protrusion is formed in a shape of a greenhouse, a greenhouse is inserted through an opening 120 to the bottom, (110) having a recessed and protruded inner protrusion (130) formed in a transverse direction and integrally formed of a zirconia material; And an opening 120 formed to have an inner diameter equal to the outer diameter of the diameter of the lower end edge of the target die to be covered with the drawing tube 100 and a predetermined error range; And a control unit.

In this case, the inner protrusion 130 of the inner tube of the zirconia-based inner protrusion 130 according to another embodiment of the present invention is provided with a streamlined shape-shaped protrusion 131 Are arranged at equal intervals or at equal intervals, and are formed as a pair on the inner upper surface and the rear surface of the inner tube main body 110.

In addition, in the inlet pipe having the zirconia-based inner protrusion according to another embodiment of the present invention, each of the protrusions 131 is formed in the inner central region And the front portion of the second side wall is directed downward.

In addition, according to another embodiment of the present invention, in the inlet pipe having the zirconia-based inner protrusion, the inner protrusion 130 formed of the respective protrusion 131 may be formed in the inner surface of the inner pipe (110), and is arranged to be downwardly shifted downward than the upward central region of the inner side of the center portion (110).

In addition, according to another embodiment of the present invention, the inlet pipe having the zirconia-based inner protrusion has a plurality of protrusions 131 formed in the inner protrusion 130 on the inner surface of the inlet pipe main body 110, Or a plurality of wafers arranged in the horizontal direction and having an embossed structure corresponding to the embossed pattern, using a three-dimensional cutter.

In addition, according to another embodiment of the present invention, a tube having a zirconia-based inner protrusion includes an adhesive-forming layer 140 formed of resin cement; And the adhesive-forming layer 140 is formed by applying the resin cement between the vertically spaced piercing tools 131.

In addition, in the inlet tube having the zirconia-based inner protrusion according to another embodiment of the present invention, the adhesive formation layer 140 may include an upper region of the protrusion 131 formed at the uppermost position, And is formed by selectively applying resin cement to the lower region of the mechanism (131).

Since the inner tube having zirconia-based inner protrusion according to the embodiment of the present invention is provided with the inner protrusion, an adhesive is put between the inner tube and the tooth to widen the adhesive area at the time of adhering, And is resistant to forces so as not to be easily separated from the teeth.

In addition, the attracting tube having the zirconia-based inner projecting portion according to another embodiment of the present invention provides an effect of enhancing the end-effect enhancement and the bursting strength in addition to the tensile strength from the attracting target.

1 shows a perspective view (FIG. 1A), a top view (FIG. 1B), and a bottom view (FIG. C) of a feed pipe 100 having a zirconia-based inner protrusion according to an embodiment of the present invention.
FIG. 2 shows a side view (FIG. 2A) and a front view (FIG. 2B) of the inlet tube 100 having a zirconia-based inner protrusion according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line A-A 'of FIG. 2B of a tube 100 having a zirconia-based inner protrusion according to an embodiment of the present invention.
FIGS. 4 to 6 are graphs for explaining differences in tensile, bending, and burst strength depending on the presence or absence of the inner protrusion in the inner tube 100 having the zirconia-based inner protrusion according to the embodiment of the present invention.
FIG. 7 is a view showing that the inlet tube 100 having the zirconia-based inner protrusion according to the embodiment of the present invention is actually manufactured.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 shows a perspective view (FIG. 1A), a top view (FIG. 1B), and a bottom view (FIG. C) of a feed pipe 100 having a zirconia-based inner protrusion according to an embodiment of the present invention. FIG. 2 shows a side view (FIG. 2A) and a front view (FIG. 2B) of the inlet tube 100 having a zirconia-based inner protrusion according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line A-A 'of FIG. 2B of a tube 100 having a zirconia-based inner protrusion according to an embodiment of the present invention. FIGS. 4 to 6 are graphs for explaining differences in tensile, bending, and burst strength depending on the presence or absence of the inner protrusion in the inner tube 100 having the zirconia-based inner protrusion according to the embodiment of the present invention. FIG. 7 is a view showing that the inlet tube 100 having the zirconia-based inner protrusion according to the embodiment of the present invention is actually manufactured.

1 to 3, a drawing pipe 100 (hereinafter referred to as a drawing pipe 100) having a zirconia-based inner protruding portion includes a drawing pipe main body 110, an opening portion 120, The inner tube 130 and the adhesive-forming layer 140 to cover and protect the inner tooth of the child, and the inner tube 110 and the inner protrusion 130 are formed using zirconia material. Here, zirconia is a bioceramic material having excellent strength and being biocompatible. In another embodiment of the present invention, 25 to 33 parts by weight of alumina having particles less than 1 micron relative to 100 parts by weight of zirconia material is subjected to a heating process, a mesh process by a needle split method, A sintered ceramic grain corresponding to 12 to 13 parts by weight of carbon fibers of 2.2 to 2.7 denier formed through stabilization by heating performed by setting the diamond lattice structure to 2.5 to 2.7 times as much as the heating temperature at the time of drawing, It is possible to reinforce the strength.

The inlet pipe main body 110 is formed integrally with a recessed and protruded inner protrusion 130 formed in the shape of a recess and inserted into the lower portion through the opening 120, desirable. More specifically, at the time of manufacturing the tube main body 110, the model of the tentacle is scanned using the scanner to obtain the outer surface coordinates of the tentative model, the coordinates of the outer surface of the tentative model are converted into the 3D design data, The inner protruding portion 130 is cut by using a three-dimensional cutting machine while the opening 120 to be described later is formed with respect to the inner tube shape, and at the same time, Can be molded.

Here, the opening 120 has an inner diameter equal to the outer diameter of the diameter of the lower edge of the target tooth covered with the inner tube 100 having the zirconia-based inner protrusion, and a predetermined error range (+/- 100 to 300 mu m) So as to maximize the fastening force between the inlet pipe main body 110 and the lower end of the inlet pipe while minimizing wear of the lower inlet end and the inlet pipe main body 110 when the inlet pipe main body 110 is inserted.

The inner protruding portion 130 is a set of stone tools whose streamlined shape is arranged at equal intervals or at equal intervals on the inner side of the inner tube main body 110, A pair of front and rear surfaces are formed.

At this time, each of the stone mechanisms 131 is formed such that the front portion thereof is directed downward in the inner central region of the front and rear regions of the inside of the inlet pipe main body 110, so that the resistance against the insertion of the inlet pipe main body 110 It is possible to provide a maximizing structure.

3, the inner protruding portion 130 formed by each of the protruding protrusions 131 may be formed to be lower than the upward central portion of the inner circumference of the protruding pipe main body 110 The present invention provides a structure that can be brought into contact with a region having a large curvature during pulling so as to maximize the resistance when inserting the tube main body 110 into the pulling furnace, It is possible to improve the fastening strength by the effect of maximizing the adhesion surface.

This is because a plurality of the stone tools 131 constituting the inner protrusion 130 on the inner surface of the inlet pipe main body 110 may be formed in the lateral direction or a plurality of wavy shapes may be arranged in the lateral direction so that the embossed structure By using a three-dimensional cutting machine.

In other words, a three-dimensional (3D) cutting process for forming the inner protrusion 130 is performed by machining a zirconia material with a three-dimensional milling machine, which is applicable to the converted 3D design data when the inlet pipe main body 110 is formed, The successive zirconia block was placed on an alumina slab and placed in an electric furnace, heated to 1800 캜 at a heating rate of 15 캜 / min and maintained for 2 hours, cooled to room temperature at a cooling rate of -4 캜 / min, to be. The density of the sintered body thus produced was measured by the Archimedes' method. As a result, the density of the sintered body was 5.2 to 5.5 g / cm ³ , which was confirmed to be a very dense sintered body having a relative density of 99.2 to 99.4%.

Tensile strength test was performed on each of the inlet pipe having the inner protrusion 130 corresponding to this structure and the sintered body and each of the inlet pipes having no inner protrusion 130.

As a test condition, a metal tube having a diameter of 6 mm and a length of 36 mm was attached to an inlet pipe having an inner protrusion 130 and an inner pipe having no inner protrusion 130, respectively, using a cemented resin cement (trade name: Mazic Cem, ] VERICOM), the metal screw ends are adhered to the inner surface of each of the inlet pipe main bodies 110 so as to be in contact with the cusps, and then stored in a shade dried for 24 hours so as to be completely cured.

Thereafter, the metal screw portion of the metal screw sample connected to the inlet pipe without the fully cured inner protrusion 130 is connected to the basket containing the weight plate of the weight of 10 kg, and then inserted into the inlet pipe without the inner protrusion 130 Take the basket of metal screws with the bite flusher and lift the basket containing the weight plate up to a height of 30 cm from the floor to measure the time of detachment (Test Example 1).

After the metal thread portion of the metal screw sample connected to the inlet pipe 100 having the fully cured inner protrusion 130 is connected to the basket containing the weight plate having the weight of 10 kg and then the inlet pipe 100 having the inner protrusion 130 ), And the basket containing the weight plate is lifted up to a height of 30 cm from the floor to measure the release time (Test Example 2).

As a result of the test, in the case of Test Example 1, the metal tube having no inner protrusion 130 was lifted from the weighing basket for 6 seconds, and the metal screw adhered to the inner tube and the inner tube was separated. At this time, the resin cement adhered to the inner surface of the injection tube was completely separated from the inner surface of the injection tube and adhered only to the metal screw.

On the other hand, in Test Example 2, the metal pipe on the inner surface of the inlet pipe 100 and the inner pipe of the inner pipe 100 was not separated from the inner pipe 130 having the inner protrusion 130 after lifting the weight plate basket. Then, the weight of the heavy plate basket was increased to 15 kg, and then the same test was carried out to measure the time. After 12 minutes, the metal screws were separated from the inner pipe 100 and the inner pipe 100.

At this time, the resin cement adhered to the concavo-convex portion on the inner surface of the inlet pipe 100 was still effectively adhered, and the adhered portions of the metal screw and the resin cement were separated.

This test shows that the inlet tube 100 with the inner protrusion 130 has an excellent tensile strength compared to the inlet tube without the inner protrusion 130. In addition, considering the direct exposure of the injection tube to saliva and moisture in the oral cavity, there is an inner protrusion 130, and the difference in tensile strength will be larger depending on the absence of the protrusion 130. [

The tensile strength becomes stronger as the height of the stone tool 131 corresponding to the concave and convex is deeper, but this causes the stone tool 131 to protrude too much to the inner surface of the inlet tube main body 110, thereby making it inconvenient for the operator. Conversely, if the height of the stone tool 131 is too shallow, a strong tensile strength can not be obtained. Therefore, it is preferable that the height of the stone tool 131 is between 0.03 mm and 0.05 mm, and the maximum height is determined within 25% of the thickness of the inlet pipe main body 110.

The adhesive-forming layer 140 is formed of resin cement. The resin cement is essentially applied between the vertically spaced stone tools 131, and further formed in the upper region of the stone mechanism 131 formed at the uppermost position, So as to maintain the adhesion between the attracting bonding surface and the inner surface of the main body 110 of the tube.

Meanwhile, in another embodiment of the present invention, the aluminum sand is collided at a high speed on the inner surface of the main pipe body 110 corresponding to the adhesive application region corresponding to the adhesive agent formation layer 140 to form a scratch, and the adhesive agent- After the application, the light is irradiated to initiate the photopolymerization, and then the injection into the infiltration path is performed. In this process, a resin paste is partially injected into the inner surface area of the inlet pipe main body 110 where the adhesive layer 140 is not applied and a part of the lower end of the inlet pipe is formed. Then, So that the strength can be reinforced.

If there is no zirconia-based inner protrusion 130 in the inlet pipe 100 designed with such a structure ('L1' when there is the inner protrusion 130 and 'L2' when there is no inner protrusion 130) The results of the measurement of the tensile strength, the bending strength, and the tear strength with the metal screws adhered to the inner surface of the borehole are shown in the graphs of FIGS. 4 to 6, and are improved when all the inner protrusions 130 are provided . The TAPPI T 404 om-87 and TAPPI T 511 om-83 were used for tensile strength and tensile strength, respectively. The tensile load was 0.4 kg. The stiffness was determined by Clark type according to TAPPI T 451 cm-84. The tear strength was measured using a Mullen low-pressure tester according to TAPPI T 403 om-85.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention , And are not intended to limit the scope of the present invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: Attachment tube with zirconia-based inner protrusion
110:
120: opening
130: inner protrusion
140: Adhesive forming layer

Claims (7)

And a protrusion-like inner protrusion 130 formed in a transverse direction inside the inserting tube main body 110 (see FIG. 1) formed integrally with the zirconia material, ); And
An opening 120 formed to have an inner diameter equal to the outer diameter of the diameter of the lower edge of the target tooth covered with the attracting tube 100 and a predetermined error range; And a zirconia-based inner protrusion. 2. The apparatus of claim 1, wherein the inner protrusion (130)
In the inside of the inlet pipe main body 110, there are provided a pair of piercing main bodies 110 having a streamlined shape of piercing mechanism 131 arranged at equal intervals or at equal intervals, Wherein the zirconia-based inner protrusion is formed on the inner surface of the inner tube. 3. The apparatus according to claim 2, wherein each of the stone mechanisms (131)
Wherein the front portion of the inside of the inlet pipe main body (110) is formed with its front portion directed downward in an inner central region of the front and rear regions, respectively. The method of claim 3,
The inner protruding portion 130 formed of each of the stone mechanisms 131 is arranged to be inclined downward than the upward central portion of the inner side of the inner tube main body 110 in addition to the formation of the respective stone mechanisms 131. [ A tube having a protrusion. The method according to claim 1,
A plurality of the stone tools 131 constituting the inner protrusion 130 on the inner surface of the main pipe body 110 may be formed in the lateral direction or in a plurality of wavy shapes in the lateral direction to form an embossed structure corresponding to the embossed pattern. Wherein the inner protrusions are formed by cutting the inner protrusions with a zirconia-based cutting tool. The method according to claim 1,
An adhesive-forming layer 140 formed of resin cement; Further comprising:
The adhesive tube (140) is formed by applying resin cement between vertically spaced stone tools (131), and the zirconia-based inner protrusion is formed. The method of claim 6, wherein the adhesive-forming layer (140)
And a resin cement is selectively applied to an upper region of the stone mechanism (131) formed at the uppermost position and a lower region of the stone mechanism (131) formed at the lowermost position. .

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