JPH0747029B2 - Maintenance device for denture - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denture holding force adjusting device for adjusting the holding force of a Cornus Krone denture, and is for adjusting the holding force by polishing the inner surface of the outer crown of the Cornus Krone denture. is there.

[0002]

2. Description of the Related Art Cornus Krone dentures have hitherto been proposed as so-called telescopic crown dentures. As shown in FIG. 3, the Cornus Krone denture is configured to have an inner crown 102 attached to the root of the tooth and an outer crown 103 externally fitted to the inner crown 102. Inner crown 102
Is made of a metallic material and has an outer side surface formed in a cylindrical shape. The outer crown 103 is made of a metal material and has a fitting hole 105 into which the inner crown 102 is fitted, and is formed into an arc shape substantially following the shape of the gingiva 101. A plurality of the fitting holes 105 are formed in the outer crown 103 according to the number of the inner crowns 102.

The outer crown 103 is mounted on the gingiva 101 as shown in FIG. 4 by fitting the fitting holes 105 and the inner crowns 102 in correspondence with each other.
The outer crown 103 has a resin front portion 10 on the outer surface which is the outer side of the oral cavity when attached to the gingiva 101.
4 is adhered and formed. This resin front part 104 is
It is made of a material such as synthetic resin and has a color and shape similar to those of natural teeth.

The outer crown 103 has a holding rod 107.
The denture base 106 is attached via the. A plurality of dentures 108 are attached to the denture base 106.
The dentures 108 are attached so as to be arranged on an arc-shaped extension line formed by the outer crown 103. When the outer crown 103 is fitted to the inner crown 102, the outer crown 103 and the dentures 108 are arranged in an arc shape on the gingiva 101.

[0005]

By the way, in the above-mentioned Cornus Krone denture, each inner crown 102 is formed.
The so-called maintenance force largely fluctuates due to a slight change in the relative size between the outer diameter and the inner diameter of each fitting hole 105 of the outer crown 103. This maintenance force means the fitting holes 105 described above.
Is a force required to disengage the outer crown 103 fitted with the inner crowns 102 from the inner crowns 102.

The inner diameter of the fitting hole 105 is the inner crown 102.
When it is relatively small with respect to the outer diameter of the inner crown 102,
It will be difficult to attach and detach. Further, when the inner diameter of the fitting hole 105 is relatively large with respect to the outer diameter of the inner crown 102, the maintenance force becomes small and the outer crown 10
3 may be inadvertently dropped from the inner crowns 102.

The relative dimensions of the inner crown 102 and the fitting hole 105 are generally adjusted by a dental technique, and the maintenance force is also a predetermined value. However, in the state after the inner crown 102 is attached to the tooth root, the maintenance force is maintained at a predetermined value depending on the temperature rise of the inner crown 102, the attachment state of the inner crown 102 to the tooth root, and the like. May not be. Therefore, conventionally, the fitting state between the inner crown 102 and the fitting hole 105 is such that the maintenance force is slightly larger than a predetermined value in the dental technical process. It has been adjusted by the dentist after attaching 102 to the root. That is, the maintenance force is adjusted after the inner crown 102 is attached to the tooth root.

The adjustment of the maintenance force is performed by polishing the inner surface portion of each fitting hole 105 of the outer crown 103. However, the outer crown 103 of the Cornus Krone denture
The fitting hole 105 has a small inner diameter, unlike a crown directly attached to a natural tooth like a so-called cast crown, and
Since it has a substantially complete cylindrical inner surface, polishing is difficult. That is, it is necessary to polish the inner surface of the fitting hole 105 for adjusting the maintenance force so that a part or the whole of the inner surface has a uniformly smooth surface.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and can easily and satisfactorily adjust the maintenance force by polishing the inner surface portion of the outer crown of the Cornus Krone denture, and the denture maintenance The purpose is to provide a force adjusting device.

[0010]

In order to solve the above problems and achieve the above objects, a denture maintenance force adjusting device according to the present invention is formed by attaching a support shaft and a tip side of the support shaft. A rubber-based abrasive, wherein the rubber-based abrasive has a columnar outer surface that is coaxial with the support shaft, the outer surface has a diameter of 2.5 mm to 4.5 mm, and the outer surface has a length. 7 mm to 10 mm, the thickness of the portion on the tip portion of the support shaft is 1 mm or less, and the tip end surface portion and the peripheral surface portion of the rubber-based abrasive are approximately 90 ° to each other.
The ridge line portion is formed around the tip surface portion at an angle of.

[0011]

In the denture maintenance force adjusting device according to the present invention, the outer surface portion of the rubber-like abrasive material adhered and formed on the distal end side of the support shaft has a diameter of 2.5 mm to 4.5 mm and a length of 7 mm. Since it has a cylindrical shape coaxial with the support shaft of 10 mm to 10 mm, it can be easily inserted into the fitting hole of the outer crown of the Cornus Krone denture, and the inner surface portion of the fitting surface of the cylindrical surface is uniform. Can be polished smoothly.

Further, since the tip end surface portion and the peripheral surface portion of the rubber-like abrasive material form an ridge line portion around the tip end surface portion at an angle of approximately 90 ° with each other, the fitting hole of the fitting hole is formed. The vicinity of the corner formed by the side surface portion and the bottom surface portion of the inner surface portion can be polished well.

Further, since the thickness of the rubber-based abrasive material deposited on the tip portion of the support shaft is 1 mm or less, this denture for polishing the inner surface portion of the fitting hole is used. It is possible to prevent eccentricity due to flexible deformation of the rubber-based abrasive when the maintenance force adjusting device is rotated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a denture maintenance force adjusting device according to the present invention is configured to include a support shaft 1 and an abrasive 2 adhered to the support shaft 1 on the distal end side. It

The support shaft 1 is formed of a material such as metal into a cylindrical shape. This support shaft 1
The length indicated by arrow A in FIG. 1 is about 40 mm to 45 mm,
The diameter shown by the arrow D in FIG. 1 is formed to be about 2 mm.

The abrasive 2 is made of a rubber abrasive and is formed on the tip side of the support shaft 1 by means of molding using a die. The polishing material 2 can be attached to the support shaft 1 by so-called insert molding, for example. That is, by mounting the support shaft 1 in the mold in advance and injecting the melted rubber-like abrasive into the mold, the rubber-like abrasive is kept in the peripheral portion of the support shaft 1. The support shaft 1 is attached and molded.

Some of the rubber-based abrasives are composed of a binder such as silicon rubber and fine particles such as alundum abrasive grains mixed in the binder. The rubber-based abrasive using silicon rubber as the binder is called a silicon abrasive. As the silicon abrasive material, due to the difference in size of the fine particles, coarse particles, medium particles,
There are types such as fine particles. The type depending on the difference in the size of these fine particles is selected according to the finish state required after polishing, that is, the surface roughness.

The outer surface of the abrasive 2 is formed in a cylindrical shape coaxial with the support shaft 1. The cylinder formed by the abrasive material 2 has a length of about 7 mm to 10 mm shown by an arrow B in FIG. 1 and a diameter of about 2.5 mm to 4.5 mm shown by an arrow E in FIG.

Further, as shown by an arrow F in FIG. 2, the tip surface portion and the peripheral surface portion of the abrasive material 2 form an angle of approximately 90 ° with each other, and a circular ridge line is formed around the tip surface portion. Forming a part.

Further, the thickness of the abrasive 2 deposited on the tip of the support shaft 1 shown by the arrow C in FIG.
It is set to 1 mm or less.

Next, a procedure for adjusting the maintenance force of the Cornus Krone denture, which is a so-called telescopic crown denture, using the denture maintenance force adjusting device according to the present invention will be described.

As shown in FIG. 3, the Cornus Krone denture has a plurality of inner crowns 102 attached to the roots of the gingiva 101 and an outer crown 103 fitted onto the inner crowns 102.
And is configured. Each of the inner crowns 102 is made of a metal material and has an outer surface portion formed in a cylindrical shape. The outer crown 103 is made of a metallic material, and each inner crown 1
02 has a plurality of fitting holes 105 to be fitted correspondingly, and is formed in an arc shape substantially following the shape of the gingiva 101. The fitting holes 105 are provided in the outer crown 103 as many as the number of the inner crowns 102.

The outer crown 103 is fitted with the fitting holes 105 and the inner crowns 102 attached to the tooth roots so as to correspond to each other, so that the gingiva 101 as shown in FIGS. 4 and 5. Mounted on. On the outer crown 103, a resin front part 104 is formed by being adhered to an outer surface part which is an outer side of the oral cavity when it is attached on the gingiva 101. The resin front part 104 is made of a material such as synthetic resin and has a color and shape similar to those of natural teeth.

A holding rod 107 is attached to the outer crown 103.
The denture base 106 is attached via the. The denture base 106 is made of a material such as synthetic resin.
A plurality of dentures 108 are attached to the denture base 106. The dentures 108 are attached so as to be arranged on an arc-shaped extension line formed by the outer crown 103. The outer crown 103 and the dentures 108 are arranged in an arc shape on the gingiva 101 when the outer crown 103 is fitted to the inner crowns 102.

In order to adjust the maintenance force, first, a conformance test is performed. This conformance test is based on the above-mentioned outer crown 103
Is fitted to each of the inner crowns 102, and the force required for this fitting and the force required to separate the outer crown 103 fitted to each of the inner crowns 102 from each of the inner crowns 102 are examined,
A portion of the inner surface portion of the fitting hole 105 that excessively abuts the outer surface portion of the inner crown 102 is detected.

For the compatibility test, as shown in FIG. 6, a compatibility test material coating device 3 in which a liquid compatibility test material 9 is contained and held in a cartridge 4 is used. Compliance test material 9
Is a one-liquid type in which a pigment is dissolved in a solvent such as water or alcohol, and is stored in a cylindrical cartridge 4 whose rear end side is closed. This cartridge 4
The front end side is open, and the peripheral portion on the front end side has a first screw portion 4b. On the front end side of the cartridge 4, a compatible test material supply cylinder 5 formed in a substantially cylindrical shape is attached by the first screw portion 4b. That is, on the inner peripheral surface portion on the rear end side of the compatible test material supply cylinder 5, the second screw portion 5a screwed into the first screw portion 4b is inserted.
Are formed. The conforming test material supply cylinder 5 is formed in a cylindrical shape with its front end side and rear end side open.

A supply amount adjusting member 6 is provided in the compatible test material supply cylinder 5. This supply amount adjusting member 6 is
It is composed of a plurality of partition walls for closing a part of the inside of the compatible test material supply cylinder 5. The supply amount adjusting member 6 appropriately limits the flow rate of the compatible test material 9 in the compatible test material supply cylinder 5 and adjusts the flow rate.

A brush portion 8 is attached to the front end side of the compatible test material supply cylinder 5 via a brush holding member 7. The brush holding member 7 is formed in an annular shape and holds the brush 8 on the inner side. The brush 8 is formed by combining a plurality of thin hair-like fibrous materials or synthetic resin materials.

In the conformity test material applying device 3, the conformity test material 9 contained in the cartridge 4 flows out from the front end side of the cartridge 4, passes through the conformity test material supply cylinder 5, and then the brush. Reach Part 8. This conformance test material 9
Penetrates between the materials forming the brush portion 8 and reaches the tip side of the brush portion 8.

The conformity test material applying device 3 has a cap member 10 detachably attached to the tip end side of the conformity test material supply cylinder 5 so as to cover the brush portion 8. The cap member 10 is the conformity test material supply cylinder 5 described above.
When it is attached to the tip side of the above, the brush portion 8 is closed in cooperation with the conforming test material supply cylinder 5 to prevent the conforming test material 9 from volatilizing or drying.

In order to carry out the above conformance test, first,
As shown in FIG. 7, the compatibility test material 9 is applied to the entire inner surface of each fitting hole 105 by the brush portion 8 of the compatibility test material application device 3. The conformity test material 9 applied to the inner surface portion is dried in order to fix the pigment in the conformity test material 9 on the inner surface portion.

Then, the fitting holes 105 each having the inner surface portion coated with the compatibility test material 9 are fitted to the inner crowns 102. At this time, a finger pressure or an occlusal pressure is applied to the outer crowns 103 to surely fit the inner crowns 102.

Next, the outer crown 103 is replaced with the inner crowns 102.
Make more detached. At this time, as shown in FIG. 8, there is a case where a peeling portion 9a where the compatibility test material 9 is peeled off is formed on the inner surface portion of the fitting hole 105. This peeling portion 9a
Occurs because the inner surface of the fitting hole 105 and the outer surface of the inner crown 102 are excessively in contact with each other. When such peeling portion 9a occurs, this outer crown 103
The maintenance power of each of the inner crowns 102 with respect to is too large.

When the peeling portion 9a is generated, the maintenance force is adjusted by polishing the portion of the peeling portion 9a on the inner surface of the fitting hole 105. In this polishing, the polishing material 2 is rotated around the axis, for example, 2000
This is performed by rotating at a high speed of 0 to 30,000 rotations and slidingly contacting the abrasive 2 with the inner surface of the fitting hole 105 as shown in FIG. Since the polishing material 2 has a diameter of about 2.5 mm to 4.5 mm, it can be easily inserted into the fitting hole 105.

To rotate the abrasive material 2, as shown in FIG. 10, the handpiece 11, which is a rotary operation device, is caused to hold the base end side of the support shaft 1, and the handpiece 11 is rotated.
Drive it. The handpiece 11 is configured to include a shaft holding portion 12, an electric motor for rotating the shaft holding portion 12, and the like. The handpiece 11 holds the base end side of the support shaft 1 by the shaft holding portion 12, and rotates the support shaft 1 together with the shaft holding portion 12 about the axis by the driving force of the electric motor. It is configured.

In the polishing of the inner surface of the fitting hole 105, the side surface of the inner surface of the fitting hole 105 is polished by the outer peripheral surface of the abrasive 2 having a cylindrical shape. Since the side surface of the inner surface of the fitting hole 105 has a cylindrical surface shape, the peripheral surface of the abrasive 2 can uniformly polish the surface to a good smooth surface. The abrasive 2 has a length of 7
Since the thickness is about 10 mm to 10 mm, the side surface portion of the inner surface portion of the fitting hole 105 can be simultaneously polished from the opening end side to the bottom surface side.

Then, the bottom surface portion of the inner surface portion of the fitting hole 105 can be polished by the tip end surface portion of the polishing material 2 which is flat.

Furthermore, since the tip surface portion and the peripheral surface portion of the abrasive 2 form an angle of approximately 90 ° with each other to form a ridge line portion around the tip surface portion, the fitting hole 105 of the fitting hole 105 is formed. The vicinity of the corner formed by the side surface portion and the bottom surface portion of the inner surface portion can be satisfactorily polished. The angle formed by the side surface portion and the bottom surface portion of the inner surface portion of the fitting hole 105 indicated by arrow G in FIG.
It is about 96 °.

In this denture maintenance force adjusting device, the thickness of the abrasive 2 adhered on the tip of the support shaft 1 is set to 1 mm or less. The eccentricity due to the flexible deformation of the abrasive 2 due to the centrifugal force caused by the rotation is prevented, and the inner surface of the fitting hole 105 can be polished with high accuracy.

After performing such polishing, the conformity test is performed again, and if it is confirmed that the peeling portion 9a does not occur, the maintenance force is in a suitable state.

[0041]

As described above, in the denture maintenance force adjusting device according to the present invention, the outer surface portion of the rubber-like abrasive material adhered to the distal end side of the support shaft has a diameter of 2.5 mm.
To 4.5 mm and a length of 7 mm to 10 mm, the columnar shaft is coaxial with the support shaft. Therefore, this rubber-based abrasive can be easily inserted into the fitting hole of the outer crown of the Cornus Krone denture, and the inner surface of the cylindrical fitting hole can be evenly and smoothly ground.

Further, the tip end surface portion and the peripheral surface portion of the rubber-like abrasive material form an ridge line portion around the tip end surface portion at an angle of approximately 90 ° with each other. Therefore, this rubber-based abrasive can satisfactorily polish the vicinity of the corner formed by the side surface portion and the bottom surface portion of the inner surface portion of the fitting hole.

Further, since the thickness of the rubber-based abrasive material adhered on the tip portion of the support shaft is 1 mm or less, this denture for polishing the inner surface of the fitting hole is used. It is possible to prevent eccentricity due to flexible deformation of the rubber-based abrasive when the maintenance force adjusting device is rotated, and to polish the inner surface of the fitting hole with higher accuracy. it can.

That is, the present invention can provide a denture maintenance force adjusting device capable of easily and satisfactorily adjusting the maintenance force by polishing the inner surface of the outer crown of a Cornus Krone denture.

[Brief description of drawings]

FIG. 1 is a side view showing a partially broken structure of a denture maintenance force adjusting device according to the present invention.

FIG. 2 is a perspective view showing a configuration of the artificial tooth maintaining force adjusting device.

FIG. 3 is a perspective view showing a configuration of a Cornus Krone denture.

FIG. 4 is a perspective view showing a state where the Cornus Krone denture is mounted.

FIG. 5 is an enlarged cross-sectional view of an essential part showing a state where the Cornus Krone denture is mounted.

FIG. 6 is a vertical cross-sectional view showing a configuration of a compatibility test material application device used for a compatibility test of the above-mentioned Cornus Krone denture.

FIG. 7 is an enlarged cross-sectional view showing a state in which the conformity test material is applied to the fitting hole of the outer crown by the conformity test material application device.

FIG. 8 is an enlarged perspective view showing a state inside the fitting hole after a compatibility test using the compatibility test material is performed.

FIG. 9 is a vertical cross-sectional view showing a state in which the inside of the fitting hole is polished by using the artificial tooth maintaining force adjusting device.

FIG. 10 is a side view showing a configuration of a rotation operating device for rotating the artificial tooth maintaining force adjusting device.

[Explanation of symbols]

 1 Support shaft 2 Abrasive

Claims (1)

[Claims] 1. A support shaft, and a rubber-based abrasive material adhered and formed on a tip side of the support shaft, wherein the rubber-based abrasive material has a cylindrical shape whose outer surface portion is coaxial with the support shaft, The outer surface portion has a diameter of 2.5 mm to 4.5 mm, the outer surface portion has a length of 7 mm to 10 mm,
The thickness of the portion on the tip portion of the support shaft is 1 mm or less, and the tip surface portion and the peripheral surface portion of the rubber-based abrasive make an angle of approximately 90 ° with each other, and a ridge line is formed around the tip surface portion. Retention force adjusting device for denture forming part.