JPH06319751A - Universal pier screw having periodontal function - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of occlusion with mating teeth and dental adjustment in the final mounting. CONSTITUTION:A universal pier screw 5 is provided with a spherical head part 6 for building a crown. A mounting hole 5 is provided so as to fit a crown 8 into the spherical head part 6 free to tilt. An adhesive 12 which is adapted to become elastic after adhesion is filled in a gap between the spherical head part 6 and the mounting hole 9. While the adhesive 12 is solidified, contact state in the occlusion between the crown 8 and a mating tooth and a dental arch are checked to allow adjustment at a cusp fitting position harmonized. A dental function depending on the adhesive 12 allows better buffering with respect to external stimulation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal abutment screw and, more particularly, to a universal abutment screw having a periodontal ligament function capable of adjusting the occlusal and dentition of a mating tooth during final mounting.

[0002]

2. Description of the Related Art As a conventional dental implant, Japanese Examined Patent Publication (Kokoku) No. 52-9955 discloses a cylindrical body in which the lower surface is formed in a hemispherical or eggplant shape, and a substantially prismatic head is erected on the upper surface. Proposed. This is because the head for crown building is integrally projected on the cylindrical body, so after this head interferes with mastication and inserts the implant into the tooth extraction socket, it impacts the implant while the tissue and implant are not stable. There is a risk of bacterial infection due to external invasion such as pressure and pressure, delay in stabilization of the implant, and invasion of bacteria from the gap created by wobbling of the implant. Therefore, as a solution to such a problem, a main body in which a temporary screw is detachably embedded is embedded in an extraction cavity or an incision cavity, and after a certain period of time has been stabilized, the temporary screw and the crown are fixed. Dental stable implants have been proposed that replace the abutment screw with the building ridge.

[0003]

In the latter dental stable implant of the prior art described above, since the protrusion does not appear outside until the main body is stabilized in the alveolar bone, the possibility of bacterial infection is eliminated and the main body is adhered. During stabilization, no impact or pressure is applied via the protrusions, so that the tissue is quickly and satisfactorily stabilized. By the way, the root portion of the tooth before extraction is covered with the periodontal ligament, and this periodontal ligament has a cushioning effect against occlusal impact, whereas in the conventional implant, it receives a part of the function of the tooth main body, that is, from the outside. It had a drawback that the impact relaxation function due to occlusal pressure was lost. Further, in the former dental implant of Japanese Patent Publication No. 52-9955 and the latter dental implant of the prior art, a dental crown is fitted and fixed to the head or the protrusion. The mounting position of the crown is determined by the mounting position of the head or protrusion, and it is easy to adjust the position of the crown in the tooth axis direction with respect to the root, adjust the occlusal contact state with the opposing teeth, and adjust the dental arch. In addition, there is also an adjusting method in which an inner crown made of resin or the like is externally fitted to the head or the protrusion to give a shock absorbing function, and the tooth crown is externally fitted to the inner crown. However, there is a problem that the adjustment work becomes complicated and takes time.

Therefore, an object of the present invention is to provide a universal abutment screw which is capable of occlusal adjustment and tooth row adjustment with the opposing teeth at the time of final mounting and has a periodontal ligament function.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a main body in which a temporary screw is removably embedded in the inside thereof, and the main body is stabilized by the alveolar bone and then replaced with the temporary screw to be disposed in the head. Universal abutment screw having a spherical head for crown building, a crown having a mounting hole for tiltably freely fitting into the spherical head, and a periodontal ligament function filled in a gap between the spherical head and the mounting hole And an adhesive having elasticity.

[0006]

With the above structure, the mounting hole is filled with the adhesive and loosely fitted into the spherical head, and the occlusal contact state with the abutment tooth and the dental arch are confirmed until the adhesive is hardened to confirm the crown. The attachment position can be adjusted, and after the attachment, the periodontal ligament function of the adhesive filled in the gap between the spherical head and the attachment hole provides excellent cushioning against external stimuli.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of the present invention,
In the figure, a screw part 2 and a plurality of fixing grooves 2A are formed on the outer peripheral surface of a cylindrical main body 1, and a temporary screw 4 having a tool groove 3 is embedded in the head of the main body 1. It is screwed in the state. The universal abutment screw 5 is replaced with the temporary screw 4 in a stable state of the main body 1 and is screwed to the main body 1, and a projection 7 having a spherical head 6 for crown construction on its head. The main body 1, temporary screw 4 and universal abutment screw 5 are made of titanium or titanium alloy. Reference numeral 8 designates a crown, and the crown 8 is loosely fitted into the spherical head portion 6 so that the crown 8 can be tilted.
The mounting hole 9 has a hemispherical portion 10 having a larger diameter than the spherical head portion 6 and an insertion hole portion 11 having a larger diameter than the spherical head portion 6 in the upper portion. An adhesive 12 is filled in the gap between the protrusion 7 and the mounting hole 9 and the gap between the upper surface 1A of the main body 1 and the lower surface 8A of the crown 8 and is made of resin cement or the like having elasticity after adhesion. Various materials are used depending on the materials of the universal abutment screw 5 and the crown 8. For example, the adhesive 12 is 4-META which is a reaction product of thiophosphoric acid type methacrylate or trimeric acid and methacrylate.
Represented by methacrylic, polycarboxylic acid containing ionomer, polyurethane, epoxy, silicon, polyvinyl, fluorine, cyanoacrylate, Alternatively, a composite of these or a triazinedithione derivative is used. In the figure, 13 is an engaging groove for removing the implant formed in the head of the main body 1, 14 is an alveolar bone, and 15 is a tooth extraction fossa.

Next, the method of using the dental stable implant having the above construction will be described. As shown in FIG.
The main body 1 is inserted into the extraction fossa 15 or the incision fossa of the alveolar bone 14 in a state in which the body 1 is impacted without a separate member. In this state, the main body 1 adheres to the surface of the main body 1 through the screw portion 2 and the fixing groove 2A due to the proliferation of natural bone, nerve fibers in the jaw bone, blood coming out of the connection site of blood vessels, lymph, etc. Stabilize. After that, an appropriate tool 10 is engaged with the tool groove 3 and the temporary screw 4
Is rotated to separate from the main body 1, and instead, as shown in FIG. 4, the universal abutment screw 5 is screwed on without a separate member. In this case, the screw is rotated during replacement, but the main body 1 and the alveolar bone 14 are adhered to each other in the fixing groove 2A, so that the main body 1 is prevented from rotating. Then, a protrusion 7 having a spherical head 6 is fixedly protruded from the main body 1.
After that, the mounting hole 9 of the crown 8 is filled with a predetermined amount of the adhesive 12,
The crown 8 filled with the adhesive 12 is externally fitted on the protrusion 7. In this state, the crown 8 can be freely tilted by 360 degrees for about 3 to 5 minutes when the adhesive 12 hardens, and the height position can be adjusted by adjusting the film thickness of the adhesive 12, and Adjust the direction and height while checking the occlusal contact state and dental arch with the mating teeth (not shown) that mesh with this crown 12
Align until 12 sets. When the alignment is completed and the adhesive 12 hardens, a film of the adhesive 12 having elasticity, for example, about 10 to 30 microns is formed on the crown 8.
The film of the adhesive 12 is formed in the gap between the protrusion 7 and the protrusion 7, and has a cushioning function at the time of occlusion and imparts a periodontal ligament function.

As described above, in this embodiment, the temporary screw 4 is internally provided.
A universal abutment screw having a main body 1 in which the main body 1 is detachably embedded, and the main body 1 is replaced with a temporary screw 4 after being stabilized in the alveolar bone 14 and has a spherical head 6 for crown construction on the head. 5
And a crown 8 provided with a mounting hole 9 which is freely tiltably fitted into the spherical head portion 6, and an adhesive agent which is filled in a gap between the spherical head portion 6 and the mounting hole 9 and has a periodontal ligament function. Since it is provided with 12, the crown 8 is provided until the adhesive 12 hardens.
Can be tilted, whereby the occlusal contact state between the crown 8 and the opposing tooth and the dental arch can be confirmed and adjusted to a harmonious cusp fitting position, and the spherical head 6 and the mounting hole 9 can be adjusted. With the simple configuration consisting of, the direction of the tooth axis can be freely adjusted by 360 degrees, and the position of the crown 8 with excellent adaptability can be easily adjusted in a short time. After the adhesive 12 hardens, a film having elasticity of the adhesive 12 is formed in the gap between the spherical head 6 and the mounting hole 9, and the film of the adhesive 12 causes the periodontal ligament to externally act. Good cushioning against stimuli.

Further, as an effect of the embodiment, in addition to the buffering action of the adhesive 12 in the gap between the spherical head 6 and the mounting hole 9,
Adhesive in the gap between the upper surface 1A of the main body 1 and the lower surface 8A of the crown 8
By filling with 12, a higher buffering effect can be obtained. Further, even when the implant is removed due to aging of tissue or lesion, the alveolar bone 14 and gingiva are significantly damaged by engaging an appropriate tool with the engaging groove 13 of the head of the main body 1 and rotating the same. It can be easily detached and removed by the screw action of the screw portion 2 without performing. Also, the adhesive 12 filled in the gap between the upper surface 1A of the main body 1 and the lower surface 8A of the crown 8
As a result, a firm fixing structure to the main body 1 can be obtained without loosening the screwing of the universal abutment screw 5.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the gist of the present invention. For example, in the embodiment, the main body 1 is provided with the screw portion 2 on the outer circumference, but the screw portion 2 is not always necessary, and the lower surface of the cylindrical body shown in the former prior art described above is formed in a hemisphere or eggplant shape. It is possible to use various shapes, such as the ones described above. As the adhesive, various adhesives can be used as long as they have elasticity after adhesion. Further, the mounting hole is not limited to the shape shown in the embodiment as long as it is loosely fitted to the spherical head and the crown is tilted, and various shapes such as a cylindrical shape, a prismatic shape or a semi-elliptical cross section are used. be able to.

[0012]

Industrial Applicability The present invention has a main body in which a temporary screw is detachably embedded, and a main body for stabilizing the alveolar bone. A universal abutment screw having a spherical head, a crown provided with a mounting hole in which the spherical head is tiltably freely fitted, and a gap between the spherical head and the mounting hole are filled to impart a periodontal ligament function. To provide a universal abutment screw having an adhesive having elasticity, capable of adjusting occlusal and dentition with an opposing tooth at the time of final mounting and having a periodontal ligament function after adhesive curing. You can

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a perspective view illustrating a mounting order of implants showing an embodiment of the present invention.

FIG. 4 is a perspective view illustrating a mounting order of implants according to an embodiment of the present invention.

[Explanation of symbols]

 1 Main body 4 Temporary screw 5 Universal abutment screw 6 Spherical head 8 Crown 9 Mounting hole 12 Adhesive

Claims (1)

[Claims] 1. A main body having a temporary screw detachably embedded therein, and a spherical head for crown crown construction which is provided by replacing the temporary screw with the temporary screw after the main body is stabilized in the alveolar bone. It has a universal abutment screw, a crown provided with a mounting hole that tiltably fits into the spherical head, and elasticity that is filled in the gap between the spherical head and the mounting hole to provide a periodontal membrane function. A universal abutment screw having a periodontal ligament function, which comprises an adhesive.