JP2005035462A - Method for manufacturing mouthpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily manufacture a mouthpiece compatible with an individual user without a sense of incongruity. <P>SOLUTION: Maxillomandibular models 1, 2 are formed and trimmed so that their rear end surfaces are arranged on the same plane surface. A thermoplastic resin sheet 7 is press-contacted with the surface of the maxillary model 1, and then the maxillomandibular models 1, 2 are fixed in an occlusal state. The fixed maxillomandibular models 1, 2 are stood up, and a thermoplastic resin sheet 8 is press-contacted with the surfaces of the maxillomandibular models 1, 2. Then, the maxillomandibular models 1, 2 are removed, and the sheets 7, 8 are trimmed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a mouthpiece integrated with upper and lower jaws by a seat pressure method.

Some mouthpieces have an upper and lower jaw integrated type provided with an oral screen that covers the upper and lower gingiva and the outer surface of the teeth, and bite platforms provided on both sides of the inner surface.
Usually, in such a mouthpiece, the oral screen covers only the front part of the gingiva and the platform is held by the upper and lower canines and the first premolar, so it is easy to come off when the occlusal force is loosened and worn for a long time Then, there is a possibility of causing displacement of the temporomandibular joint, and it is very uncomfortable because it is not adapted to the form in the oral cavity of the individual.

Therefore, a bite part for holding a bite that is molded in conformity with the dental arch form of the individual and shaped in an occlusal form with the individual upper and lower molar parts in the left and right backs, as tailored to the oral form of the individual. A mouthpiece is known (see Patent Document 1).
However, this is just the shape of the protruding part of the bite part matched to the occlusal surface, the oral screen is not molded according to the user, and the bite part is molded in the oral cavity. As it is, the suitability for individuals is not sufficient, and it is thick and uncomfortable. In addition, since the molded bite part is attached to the gas guide part by fitting, bonding or the like, there is a concern that the bite part may come off when used for a long period of time.

Furthermore, there has been proposed a mouthpiece in which a cavity for accommodating a dental arch is formed in accordance with a statistically preset average shape of a plurality of individual teeth and gingiva (see Patent Document 2). .
However, since this mouthpiece is molded based on average numerical values, it is often not suitable for individual users.

Japanese Patent Laid-Open No. 10-167179 JP 11-42311 A

  An object of the present invention is to easily manufacture a mouthpiece that is durable, suitable for an individual user, and less uncomfortable.

  In order to achieve the above object, the method of manufacturing a mouthpiece of the present invention creates a model of the upper and lower jaws from an impression collected by a conventional method, and the rear end surfaces of the upper and lower jaw models are arranged on the same plane. After trimming, a thermoplastic resin sheet is pressed onto the surface of the upper jaw model, and the upper jaw model and the lower jaw model pressed against the sheet are fixed in an occlusal state, and then the upper and lower jaw models are moved to the next. With the end face up, press the thermoplastic resin sheet on the upper and lower jaw model surface, then remove the upper and lower jaw model and extend the peripheral part of the sheet to the molar part To trim.

  In the scuba diving regulator mouthpiece manufacturing method, the upper and lower jaw models are fixed in an occluded state, and then the upper gastroscopic cylinder is attached to the surface of the upper surface of the upper jaw model in a state where a hollow gas introduction tube is attached. A sheet of thermoplastic resin is pressed against the surface of the lower jaw model and the gas introduction cylinder, and then the upper and lower jaw models are removed, and the sheet is trimmed at the periphery and inside the gas introduction cylinder.

Alternatively, after creating a cylinder model in accordance with the inner peripheral shape of the gas introduction cylinder part of a commercially available scuba diving mouthpiece, and then pressing a thermoplastic resin sheet on the surface of the cylinder model Then, by trimming the peripheral edge of the sheet, a solid gas introduction cylinder having a cylinder model inside is created, and after fixing the upper and lower jaw models in an occlusal state, the solid gas introduction cylinder Is attached to the surface of the sheet pressed against the surface of the upper jaw model, a sheet of thermoplastic resin is pressed against the surface of the upper and lower jaw model and the gas introduction cylinder, and then the upper and lower jaw model and the cylinder portion The model is removed, and the sheet is trimmed in the periphery and the inside of the gas introduction cylinder.
When manufacturing a scuba diving mouthpiece, after heating and softening the sheet pressed against the surface of the gas introducing cylinder, a belt having an appropriate width is wound around the surface, and the belt is removed after heat dissipation. A groove for fixing the diving regulator may be formed.

According to the first aspect of the present invention, a mouthpiece that fits the individual's individual's occlusion can be easily manufactured, and the oral screen part and the bite part that cover the upper and lower jaws are integrally formed and separated. Since the bite portion reaches the molar teeth, the mouthpiece can be reliably occluded and held over the entire surface of the teeth, and the occurrence of temporomandibular disorders can be suppressed.
Moreover, since the sheet | seat is laminated | stacked double on the upper jaw side, the oral screen part of the manufactured mouthpiece can protect the upper jaw which is easily damaged.
According to the second aspect of the present invention, it is possible to suppress the occurrence of temporomandibular disorders in scuba diving, where the teeth are often strongly bitten by tension.
According to the invention which concerns on Claim 3, it can utilize as a mouthpiece of the regulator currently used conventionally.

Hereinafter, an embodiment which is a manufacturing method of a mouthpiece of a scuba diving regulator will be described in detail with reference to the drawings.
In order to manufacture the mouthpiece, first, the user's upper and lower jaw impressions and occlusions are collected using an alginate impression material in a conventional manner.
Next, hand-kneaded hard plaster is poured into the collected impression and taken out after hardening, and an upper jaw model 1 (FIG. 2) and a lower jaw model 2 (FIG. 3) are prepared.
The upper and lower jaw models 1 and 2 are trimmed so that there are no sharp parts. Since the above process is conventionally performed, it is not particularly shown.

The models 1 and 2 of the upper and lower jaws are attached to the articulator by the split cast method so that they can be removed, and the position in the occlusal state is adjusted.
Then, the rear end surfaces a and a ′ of the upper and lower jaw models 1 and 2 are trimmed flat so as to be arranged in the same plane in an occlusal state.
In addition, gypsum is poured into a tube portion for gas introduction of a commercially available scuba diving mouthpiece that has been used by a user, and then taken out after curing to create a model 3 (FIG. 1) of the tube portion.

A silicon-based or alginic acid-based separating agent is applied to the surface of the cylindrical model 3, and as shown in FIG. 1, this is standing on a model mounting table 4 of a suction-type or pressure-type sheet molding machine. Put it on.
Further, a sheet 5 of heat-softened thermoplastic resin is placed on the tube model 3 and sucked with a negative pressure from below, or pressed with a positive pressure from above, to the surface of the tube model 3. The sheet 5 is pressed. As the suction-type or pressure-type sheet forming machine, a conventionally known one, for example, “Proform molding machine” manufactured by Molten Medical Co., Ltd. can be used.
The thickness of the sheet 5 is about 3 mm, and the thermoplastic resin that is the material of the sheet 5 is usually an ethylene vinyl acetate copolymer resin. A rectangular sheet is often used when suctioning with negative pressure, and a circular sheet is often used when pressing with negative pressure.
After radiating heat, the surplus portion around the sheet 5 is trimmed and removed, and the gas introduction cylinder 6 (FIG. 3) is created. The cylinder part model 3 is left in the gas introduction cylinder 6 without being taken out.

Further, a similar separating agent is applied to the surface of the upper jaw model 1, and as shown in FIG. 2, this is placed in a standing state on the model mounting table 4 of the sheet forming machine, and the same as the sheet 5 thereon. The sheet 7 is covered with heat softening.
Next, pressure is applied with a sheet molding machine to press the sheet 7 against the surface of the upper jaw model 1, and after heat radiation, the peripheral edge of the sheet 7 is trimmed.
At this time, the trimming is preferably performed to be larger than the final outer edge and slightly below the split cast portion so that the sheets can be laminated in a subsequent process and can be extended by heating.

Next, the upper jaw model 1 and the lower jaw model 2 pressed with the thermoplastic resin sheet 7 are fixed in an occluded state using silicon resin or the like, and the front surface of the sheet 7 pressed against the surface of the upper jaw model 1 is fixed. The gas introduction cylinder 6 is attached to the part with the model 3 attached. In order to attach the gas introducing cylinder 6 to the sheet 7, it may be fused using a heating gun or the like.
Thereafter, a separating agent is applied to the surface of the lower jaw model 2 and, as shown in FIG. 3, the fixed upper and lower jaw models 1 and 2 are placed on the model mounting table 4 of the sheet forming machine. Stand up with 'down (gas introduction cylinder 6 up).

The upper and lower jaw models 1 and 2 and the gas introducing cylinder 6 are covered with a sheet 8 similar to the sheet 5 and the sheet 7 by heating and softening, and a negative pressure or a positive pressure is applied by a sheet forming machine. The sheet 8 is pressed against the surfaces of the models 1 and 2 and the gas introduction cylinder 6.
After taking out the heat from the sheet forming machine, the sheet 8 on the surface of the gas introducing cylinder 6 is softened by heating with a heating gun or the like to form the regulator fixing groove 13, as shown in FIG. Then, a belt 9 having an appropriate width is wound around the surface and pressed.
After heat radiation, the belt 9, the upper and lower jaw models 1 and 2, and the cylindrical part model 3 are taken out of the molded sheets 5, 7, and 8.

Finally, the sheets 7 and 8 are trimmed in the peripheral portion and the inside of the gas introduction tube 6 to remove excess portions, and as shown in FIG. 5, the oral screen portion 10, the bite portion 11, the tube portion 12 Get a mouthpiece that unites with.
Trimming is performed so that the bite portion 11 extends to the molar teeth, the oral screen portion 10 reaches near the cheek transition portion of the gingiva, and close to the cervical portion on the upper palate side, and all the cylindrical joint portions of the anterior teeth are hollowed out. Do.

It is also possible to manufacture a mouthpiece for sports or treatment other than scuba diving by pressing the seat 8 without attaching the gas introducing cylinder 6.
Further, by changing the shape and size of the gas introduction tube 6, a mouthpiece for snorkeling can be obtained.
Furthermore, the gas introduction tube portion of the commercially available scuba diving mouthpiece can be used as a hollow gas introduction tube 6 attached to the surface of the seat 7 as it is.
Further, the sheets 5, 7, and 8 can be pressed without attaching a separating agent.

The figure which shows the preparation process of a gas introduction cylinder. The figure which shows the process in which a sheet | seat is pressure-contacted to the upper jaw model. The figure which shows the process in which a sheet | seat is press-contacted to the model of an upper and lower jaw. The figure which shows the formation process of the groove | channel for regulator fixation. The perspective view of a mouthpiece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Model of upper jaw 2 Model of lower jaw 3 Model of cylinder part 4 Model mounting table 5, 7, 8 Sheet 6 Gas introduction cylinder 9 Belt 10 Oral screen part 11 Bit part 12 Tube part 13 Groove a, a 'Rear end face

Claims (4)

  After creating a model of the upper and lower jaws from an impression collected by a conventional method, and performing trimming so that the rear end face of the upper and lower jaw models are arranged on the same plane, a sheet of thermoplastic resin on the surface of the upper jaw model The upper jaw model and the lower jaw model pressed against each other are fixed in an occlusal state, and then the upper and lower jaw models are heated up on the upper and lower jaw model surfaces with their rear end surfaces facing downward. A method for manufacturing a mouthpiece, comprising pressing a plastic resin sheet, then removing the upper and lower jaw models, and trimming the periphery of the sheet to a length extending to a molar part.   After the upper and lower jaw models are fixed in an occlusal state, a thermoplastic is applied to the surfaces of the upper and lower jaw models and the gas introduction cylinder with a hollow gas introduction cylinder attached to the surface of the sheet pressed against the surface of the upper jaw model. The mouthpiece manufacturing method according to claim 1, wherein the resin sheet is pressed and then the upper and lower jaw models are removed, and the sheet is trimmed in the periphery and the inside of the gas introduction cylinder.   A cylinder model is prepared in accordance with the inner peripheral shape of the gas introduction cylinder part of a commercially available scuba diving mouthpiece, and then a thermoplastic resin sheet is pressed against the surface of the cylinder model, By trimming the peripheral edge of the sheet, a solid gas introduction cylinder having a cylinder model inside is created, and after fixing the upper and lower jaw models in an occlusal state, the solid gas introduction cylinder is In a state of being attached to the surface of the sheet pressed against the surface of the upper jaw model, a sheet of thermoplastic resin is pressed against the surface of the upper and lower jaw model and the gas introduction cylinder, and then the upper and lower jaw model and the cylinder part model The manufacturing method of the mouthpiece described in Claim 1 which trims the said sheet | seat in a surrounding part and the inside of the said gas introducing | transducing cylinder. After heating and softening the sheet pressed against the surface of the gas introducing cylinder, a belt having an appropriate width is wound around the surface, and the belt is removed after radiating heat to form a groove for fixing the scuba diving regulator. The manufacturing method of the mouthpiece of Claim 2 or 3 to form.

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