JP2004194932A - Jaw denture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jaw denture which can be easily mounted and removed without feeling pain when caring for the oral cavity everyday. <P>SOLUTION: The jaw denture is provided with an obturator (14) on the mucosa side of an upper jaw dental plate (11). The obturator is made by using expandable or contractible material, and can be combined airtightly with a receiving part (13) on the mucosa side of the upper jaw dental plate. The obturator is held by injecting gas to its inside by an injection valve (15). Further, by injecting and holding the gas into the obturator with the injection valve (15), the obturator is expanded into a hollow three-dimensional shape nearly imitating the three-dimensional shape of a lost space inside an upper jaw deficit part to plug the lost space inside the upper jaw deficit part, and the gas in the obturator is released from the injection valve to contract the obturator to be pulled out from the upper jaw lost part. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dental prosthesis, and more particularly to a dental prosthesis that can be easily and painlessly attached and removed during daily oral care.
[0002]
[Prior art]
For example, a defect may occur in the maxilla or cheekbone due to a tumor or the like. In addition, it may be necessary to remove the maxilla and zygomatic bones during the treatment in order to treat the disease. In such cases, facial muscles and skin tissues contract due to defects in the maxilla and zygomatic bones, leaving scars, and so-called scar contractions often occur. Instead, it may cause trismus and inconvenience everyday conversations.
[0003]
Therefore, using a synthetic resin material, for example, a denture base resin, a hollow obturator having a shape to prosthet the defective part of the maxilla and the zygomatic bone and the defective space is manufactured, and the obturator is fixed to the denture base, and the maxillary bone is fixed. There has been proposed a jaw denture which is inserted into a defect space inside from a defect part of the jaw to reduce scar contraction (for example, see Patent Documents 1 and 2).
[0004]
[Patent Document 1] Japanese Patent Publication No. 51-13956 [Patent Document 2] Japanese Patent Application Laid-Open No. 02-124157
[Problems to be solved by the invention]
However, in conventional jaw dentures, the obturator is formed into a predetermined shape using a synthetic resin material, for example, a denture base resin, so that daily oral care, for example, attachment and removal of the jaw denture when brushing teeth, is difficult. Not only is it very complicated, but also there is a problem that the obturator touches the mucous membrane on the surface of the maxilla and cheekbone at the time of attachment and detachment, causing severe pain to the user. Further, the resin obturator is hard and difficult to insert into every corner of the defect space, and there is a problem that it cannot cope with the movement of the face (cheek) or the change over time.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a denture which can be easily attached and detached without any pain during daily care of the oral cavity.
[0007]
[Means for Solving the Problems]
In view of this, the jaw denture according to the present invention provides artificial teeth on the maxillary denture base, and in a jaw denture provided with an obturator on the mucosal side of the maxillary denture base, the obturator uses a material that can expand and contract. It is manufactured and has a hollow three-dimensional shape almost simulating the three-dimensional shape of the defect space inside the maxillary bone defect part at the time of expansion, while the obturator is air-tightly coupled to the receiving part on the mucosal side of the maxillary denture base and The inside of the obturator is provided so that gas is injected and held by an injection valve, and the obturator is formed into a predetermined three-dimensional shape by injecting and holding gas in the obturator by the injection valve. Inflated to close the defect space inside the maxillary bone defect, and the gas in the obturator is released from the injection valve, so that the obturator contracts and can be extracted from the defect space inside the maxillary defect. Become And wherein the Rukoto.
[0008]
One of the features of the present invention is that the obturator expands by injecting gas and contracts by releasing gas.
[0009]
Thereby, the obturator can be contracted and easily inserted and extracted from the defect area of the maxillary bone into the defect space inside, and the obturator can be expanded to close the defect space inside the defect part of the maxillary bone. .
[0010]
As a result, scar shrinkage can be reliably prevented, and the jaw denture can be easily removed and worn at the time of daily oral care, and the obturator may have an upper jaw or cheekbone at the time of wearing and removing. It does not cause severe pain to the user by touching the mucous membrane on the surface. Furthermore, since the obturator can expand and contract, it can quickly respond to facial movements and changes over time.
[0011]
The material of the obturator may be any material that can expand and contract, and for example, various latexes or polyesters in which a polymer such as natural rubber, synthetic rubber, or plastic is emulsified can be used.
[0012]
The maxillary denture base and the artificial tooth may be conventionally known ones. The receiving portion of the upper denture base may be formed integrally when the denture base is manufactured, or may be manufactured separately and fixed to the denture base. In particular, in the latter case, the denture according to the present invention can be obtained by fixing the receiving portion to the denture base that is already in use.
[0013]
The injection valve may be of any structure and type as long as it can inject, hold and release gas. In addition, it is necessary to inject and discharge gas into the obturator with the obturator set in the defect space inside the maxillary bone defect, so this injection valve should be installed in the maxillary denture base or its receiving part. Good.
[0014]
In addition, the method for manufacturing a denture according to the present invention provides a method for manufacturing a denture in which an artificial tooth is provided in a maxillary denture base and an obturator is provided on a mucosal side of the maxillary denture base. By producing a model that roughly imitates the three-dimensional shape of the above, an expandable / contractible material is applied or adhered to the surface of the model, and the expandable / contractible material is peeled off from the model, so that when inflated, the maxillary bone defect is inward Creates an obturator that can be extracted from the defect space inside the above maxillary bone defect when contracting and forms a hollow three-dimensional shape that almost imitates the three-dimensional shape of the defect space, and hermetically secures the obturator to the receiving part of the maxillary denture base In addition, an injection valve for injecting and holding gas into the obturator and releasing gas in the obturator is provided in the upper denture base or the receiving portion.
[0015]
For the model of the defect space, for example, an impression of the defect space inside the maxillary bone defect part is collected using a known impression material, and a plaster model can be modeled using the collected impression. At the stage of this model, it is advisable to check where the obturator touches the mucous membrane and where the strength of the obturator is required, and correct the model.
[0016]
The expandable / contractible material may be applied to the surface of the model in the defective space, or may be attached to the model surface by immersing the model in the expandable / contractible material.
[0017]
The obturator is hermetically secured to the receiving part of the maxillary denture base. The fixing method may be appropriately selected in consideration of the compatibility of the materials of the receiving portion and the obturator.
[0018]
Also in this case, the receiving part is preferably formed integrally with the upper denture base or fixed to the upper denture base.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on specific examples. 1 and 2 show a preferred embodiment of a denture according to the present invention. In the figure, a denture 10 has an artificial tooth 11 airtightly fixed to a denture base 11 and an obturator 14 fixed to a receiving portion 13 on the mucous membrane side of the denture base 11.
[0020]
The denture base 11 is manufactured using a resin, and the artificial tooth 12 is a resin tooth or a porcelain tooth. However, since it is the same as a known tooth, detailed description thereof will be omitted.
[0021]
The obturator 14 has a hollow three-dimensional shape substantially imitating the three-dimensional shape of the defect space inside the maxillary bone defect part, and is expanded and contracted using a commercially available latex (for example, trade name MASK LATEX IUSQt. Manufactured by SPECIAL EFFECT SUPLY CO., Ltd.). It is made possible.
[0022]
An injection valve 15 is attached to the denture base 11. The injection valve 15 has a structure that injects and holds air (gas) into the obturator 14 while releasing air as needed. For example, as shown in FIG. 2, the injection valve 15 has a rod 21 inserted into the cylindrical body 20, and a valve part 22 for closing an opening of the cylindrical body 20 is provided at one end of the rod 21. A structure in which a spring member 23 for urging the portion 21 in the closing direction is extrapolated can be adopted.
[0023]
The injection valve 15 needs to be operated for injecting and discharging air in the oral cavity, so it is preferable to provide the injection valve 15 at a site that can be operated in the oral cavity.
[0024]
When manufacturing the denture of this example, as shown in FIG. 3, an impression of the alveolar cavity and the maxillary bone defect site is collected using, for example, an alginate impression material (step S10), and a gypsum model is formed from the obtained impression. Molding is performed (step S11). Using this model, an artificial tooth is arranged and a wax denture having gums formed is manufactured (step S12). The wax denture is buried in gypsum, and the wax is dissolved and allowed to flow out. The denture base 11 on which the artificial teeth 12 are fixed is taken out by filling the resin and irradiating microwaves by, for example, a microwave oven to perform polymerization (step S13). Since the manufacture of the denture is the same as the conventional one, it can be manufactured by another method.
[0025]
After drilling a through hole from a predetermined portion of the obtained denture base 11, for example, a portion that is easy to operate in the oral cavity, toward the receiving portion 13 and fixing the injection valve 15 to the through hole (step S <b> 18), the denture base 11 is removed. Grind.
[0026]
On the other hand, an impression is also taken using the alginate impression material for the defect space inward of the maxillary bone defect part (step S14), and a model of the defect space is modeled from the obtained impression using, for example, gypsum material (step S15). ). At this time, the place where the obturator 14 touches the mucous membrane to feel pain or the place where the obturator 14 should be reinforced is checked, and the model is corrected so that the corresponding place becomes concave or convex.
[0027]
Latex (for example, trade name MASK LATEX IUSQt. Manufactured by SPECIAL EFFECT SUPLY CO.) Is applied to the obtained model (step S16). When the latex hardens, this is peeled off from the model and adhered to the receiving portion 13 of the denture base 11. (Step S19). Finally, air is injected from the injection valve 15, and it is checked whether there is any air leakage. If there is no air leakage, the patient is allowed to try it, and then, when wearing, removing, or biting, the patient feels pain. If there is no pain, the intended denture 10 is obtained (step S20).
[0028]
When the denture 10 of the present example is to be mounted, the obturator 14 is contracted, and the obturator 14 is inserted from the maxillary bone defect into the inward deficit space while the jaw denture 10 is mounted in the oral cavity. Then, since the obturator 14 is in the contracted state, the obturator 14 does not touch the maxillary bone defect or the mucous membrane of the defect space, and the user can move the obturator 14 from the maxillary defect to the inner side with almost no pain. It can be easily inserted into the missing space.
[0029]
When the denture 10 can be set, air is injected from the injection valve 15. Then, the rod 21 of the injection valve 15 is pushed against the spring force of the spring member 23, the valve portion 22 opens the opening of the cylindrical body 20, air is injected into the obturator 14, and the obturator 14 expands. To close the defect space inside the maxillary defect. When the injection of air is stopped, the rod 21 of the injection valve 15 is pushed forward by the spring force of the spring member 23, the valve portion 22 closes the opening of the cylinder 20, the air in the obturator 14 is held, and the obstruction is stopped. Since the child 14 is maintained in a swollen three-dimensional shape, it swells the facial muscles and skin tissue, so that scar shrinkage is reduced.
[0030]
When the denture 10 is removed, when the rod 21 of the injection valve 15 is pressed, the valve portion 22 opens the opening of the cylindrical body 20, the air in the obturator 14 is discharged outward, and the obturator 14 contracts. Thereafter, the denture 10 may be taken out of the oral cavity as usual. At this time, since the obturator 14 is contracted, the user does not touch the maxillary bone defect or the mucous membrane in the defect space at the time of removal, and the user hardly feels pain.
[Brief description of the drawings]
FIG. 1 is a front perspective view showing a preferred embodiment of a jaw denture according to the present invention.
FIG. 2 is a cross-sectional view showing a structural example of an injection valve in the embodiment.
FIG. 3 is a view showing one example of a manufacturing method in the embodiment.
[Explanation of symbols]
10 jaw denture 11 denture base 12 artificial tooth 13 receiving part 14 obturator (latex, balloon)
15 Injection valve (air valve)

Claims (6)

While providing artificial teeth in the maxillary denture base, in the jaw denture provided with an obturator on the mucosal side of the maxillary denture base,
The obturator is manufactured using a material that can be expanded and contracted, and at the time of its expansion, while forming a hollow three-dimensional shape that almost mimics the three-dimensional shape of the defect space inside the maxillary bone defect,
The obturator is air-tightly coupled to the receiving portion on the mucosal side of the maxillary denture base, and is provided so that gas is injected and held by an injection valve inside thereof.
By injecting and holding gas into the obturator by the injection valve, the obturator expands in a predetermined three-dimensional shape to close the defect space inside the maxillary bone defect, and the gas in the obturator is injected into the obturator. A jaw denture characterized in that the obturator contracts by being released from a valve and can be extracted from a defect space inside the maxillary bone defect part. The denture according to claim 1, wherein a receiving portion for fixing the obturator is formed integrally with the denture base. The denture according to claim 2, wherein a receiving portion for fixing the obturator is fixed to the denture base. The denture according to any one of claims 1 to 3, wherein the injection valve is attached to the denture base or the receiving part. In producing a denture with artificial teeth on the maxillary denture base and an obturator on the mucosal side of the maxillary denture base,
Produce a model that almost imitates the three-dimensional shape of the defect space inside the maxillary defect,
By applying or attaching an inflatable / contractible material to the surface of the model and peeling the inflatable / contractible material from the model, a hollow three-dimensional shape that almost simulates the three-dimensional shape of the defect space inside the maxillary bone defect part when inflated is obtained. Produce an obturator that can be pulled out from the defect space inside the maxillary defect at the time of contraction, making the shape,
An obturator is hermetically fixed to the receiving part of the maxillary denture base, and an injection valve for injecting and holding gas into the obturator and releasing gas in the obturator is provided in the maxillary denture base or the receiving part. A method of manufacturing a denture with a prosthesis as described above. 6. The method for manufacturing a denture according to claim 5, wherein the receiving portion is formed integrally with the upper denture base or is fixed to the upper denture base.

Images