WO2019058575A1

WO2019058575A1 - Flask for manufacturing dental duplicate model

Info

Publication number: WO2019058575A1
Application number: PCT/JP2018/003491
Authority: WO
Inventors: 吉雄大山; 定和大山
Original assignee: 株式会社ＵＬＴＩ－Ｍｅｄｉｃａｌ
Priority date: 2017-09-25
Filing date: 2018-02-01
Publication date: 2019-03-28
Also published as: JP6288690B1; JP2019058289A

Abstract

(Problem) To provide a flask for manufacturing a dental duplicate model, the flask enabling a hardened mold to be easily removed after duplicate model impression material such as fluid silicon has been injected into the flask. (Solution) This flask for manufacturing a dental duplicate model comprises: a base member having a flat surface on which a master model of a dental prosthesis is placed; and a cylindrical side member that can be removably attached to the base member. The side member has openings in the upper surface and the lower surface thereof, is composed of a thermoplastic resin, and is provided with weak parts in a thickness direction that are weaker than the other parts of the side member.

Description

Flasks for making dental complex models

The present invention relates to a flask for producing a dental complex model, and more particularly, to a dental complex model which can easily take out a solidified mold after injecting a complex model impression material such as fluid silicone into the flask. It relates to a flask for making.

Conventionally, preparation of a denture base or partial denture base made of metal or resin is performed according to the following procedure.
First, take a model (gypsum model) in the mouth (jaw) shape of the patient.
Next, the model is placed in a flask for producing a double model, and a double-model impression material such as fluid silicone (hereinafter, fluid silicone) having fluidity is injected into the flask and solidified to form a silicone. And so on.
Then, an inflating mold material adjusted with a component such as phosphate is filled in a recess of the mold and solidified to prepare a working double model (replica model) based on the original main model.
Then, another mold is combined on the enlarged double pattern, and a metal or resin in a high-temperature molten state is poured into the cavity between the two to prepare a metal or resin denture base or partial denture base.

For example, Patent Document 1 has a bottom plate portion having a flat inner bottom surface, and a side wall portion surrounding the inner bottom surface, a space formed by the inner bottom surface and the inner surface of the side wall portion and capable of containing a plurality of spheres. And the corresponding plurality of positions perpendicular to the plurality of positions around the inner bottom surface, the plate being elastically movable in the vertical direction by the weight received from the supporting plate An apparatus is disclosed for making a dental replica model comprising a plurality of horizontally supportable support members.

Patent No. 5863678

The flask for producing the above-mentioned conventional double pattern is not disposable but manufactured for the purpose of repeated use. Therefore, after the impression material for composite models, such as fluid silicone, was poured into the flask and solidified, and a mold was produced, a strong force was required when removing the flask from the solidified impression material. Therefore, when removing a flask from the solidified impression material, there also existed a possibility of destroying the solidified impression material.

Furthermore, since the flask for producing the conventional double model is repeatedly used, maintenance such as cleaning is required each time it is used, and there is also a problem that the operation becomes complicated.

The present invention has been made to solve the problems of the prior art as described above, and it is a disposable dental which is easy to take out a solidified mold after injecting a double-model impression material such as fluid silicone into a flask. The present invention provides a flask for producing a composite model of

The invention according to claim 1 is a base material having a flat surface on which the present model of a dental prosthesis is placed;
And a cylindrical side member detachably attachable to the bottom member,
The side material has an opening on the upper surface and the lower surface, and is made of a thermoplastic resin,
The present invention relates to a flask for producing a dental double model, characterized in that the side material is provided with a fragile portion whose strength is weaker than the other portions of the side material in the thickness direction.

The invention according to claim 2 relates to a flask for producing a dental complex model according to claim 1, wherein the thermoplastic resin is polystyrene, acryl, polycarbonate, or a combination thereof. .

The invention according to claim 3 is characterized in that the side member has a draft angle which is inclined by 2 to 4 degrees with respect to a normal extending from the upper surface to the lower surface. The present invention relates to a flask for producing a dental compound model as described in the above.

The invention according to claim 4 relates to a flask for producing a dental complex model according to any one of claims 1 to 3, characterized in that the side material is transparent or translucent. .

The invention according to claim 5 is characterized in that the base material is provided with a magnetic body or a magnet for fixing the present model of a dental prosthesis, according to any one of claims 1 to 4, The present invention relates to a flask for producing a dental complex model.

According to the invention of claim 1, the side material is provided with a bottom material having a flat surface on which the main model of the dental prosthesis is placed, and a cylindrical side material detachably attachable to the bottom material, the side material comprising In the present invention, the side material has openings in the upper surface and the lower surface and is made of a thermoplastic resin, and the side material is provided with a fragile portion having a weaker strength than the other portions of the side material in the thickness direction. The impression material for multiple models such as fluid silicone is poured into the flask and solidified, and after the mold is made, the fragile part is broken by applying a force to the fragile part with a hand, a tool etc., more easily the side of the flask The material can be removed from the mold.

According to the invention of claim 2, since the thermoplastic resin is polystyrene, acryl, polycarbonate, or a combination thereof, the fragile portion of the side member of the flask according to the present invention can be more easily broken, and Fragments of side materials after breaking can be removed without being scattered.

According to the invention of claim 3, since the side material has a draft angle which is inclined at 2 to 4 degrees with respect to the normal line extending from the upper surface to the lower surface, the side materials may be overlapped. it can. Thereby, when the size of the model is large and the height of the side material of the flask is insufficient when the main model is placed on the flask according to the present invention, the side material of the flask is overlapped in the upward direction, The height of the side material of the flask can be increased, and the mold can be more easily manufactured even in the present model having a size that can not be accommodated conventionally.

According to the invention of claim 4, when the side material is transparent or translucent, the model is placed in the flask according to the present invention, and the impression material for double model such as fluid silicone is poured into the flask In addition, it is possible to confirm a state such as whether the present model placed in the flask is not moving or does not contain air bubbles, and the operation of correcting the position of the present model or removing the air bubbles can be performed.

According to the invention as set forth in claim 5, since the base material is provided with a magnetic body or a magnet for fixing the present model of the dental prosthesis, the base material is mounted on the present model placed on the flask according to the present invention. By providing a magnet or by providing a magnetic body or a magnet, the model can be more easily and firmly held on the bottom of the flask. In this way, an impression material for composite model such as fluid silicone is poured into the flask according to the present invention and solidified, thereby preventing the degradation of the accuracy of the composite model caused by the movement or displacement of the model when producing a mold. it can.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view of the base material and side material of the flask for producing the dental double model based on this invention. It is a schematic perspective view which shows a mode that the base material and the side material were attached, of the flask for producing the compound double model for dental based on this invention. It is a schematic sectional drawing of the flask for producing the compound double model for dental based on this invention, Comprising: This model is mounted in a base material, a base material and a side material are attached, Impression materials for compound models, such as fluid silicone It is a schematic sectional drawing which shows a mode that it inject | poured. It is a schematic sectional drawing of the flask for producing the compound double model for dental based on this invention, Comprising: This model is mounted in a base material, a base material and a side material are attached, Impression materials for compound models, such as fluid silicone It is a schematic sectional view which shows the state which inject | poured and solidified, and the back side material was broken and it removed from the mold.

Hereinafter, a preferred embodiment of a flask for producing a dental double model according to the present invention will be described with reference to the attached drawings.
FIG. 1 is a schematic perspective view of a base material and a side material of a flask for producing a dental double pattern according to the present invention. FIG. 2 is a schematic perspective view showing a bottom material and a side material attached to a flask for producing a dental double model according to the present invention. FIG. 3 is a schematic cross-sectional view of a flask for producing a dental compound model according to the present invention, in which the present model is placed on the base material, the base material and side materials are attached, It is a schematic sectional drawing which shows a mode that the impression material for models was inject | poured. FIG. 4 is a schematic cross-sectional view of a flask for producing a dental compound model according to the present invention, in which the present model is placed on the base material, the base material and side materials are attached, It is a schematic sectional drawing which shows the state which inject | poured and solidified the impression material for models, divided the back side material, and removed from the mold.

As shown in FIGS. 1 to 4, a flask (1) for producing a dental compound model according to the present invention is a bottom material (2) in which the surface on which the main model (4) of the dental prosthesis is placed is flat. And a cylindrical side member (3) detachably attachable to the bottom member (2).

The bottom material (2) has a shape in which the surface on which the main model (4) of the dental prosthesis is placed becomes flat when the bottom material (2) is placed on a work table such as a table.
In addition, the base material (2) has a shape in which the surface on which the main model (4) of the dental prosthesis is placed becomes flat when the base material (2) is placed on a work bench such as a table. The shape may be any shape as long as the material (3) can be detachably attached.

The material of the bottom material (2) is preferably polycarbonate (PC) from the viewpoint of impact resistance and heat resistance, but is not limited thereto. For example, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, Any resin such as Teflon (registered trademark), ABS resin, synthetic resin such as acrylic resin, metal, glass, wood, or a combination thereof can be used.

The base material (2) may be provided with a magnetic body or magnet (21) for fixing the present model (4) of the dental prosthesis (see FIG. 3). By providing the magnetic body or magnet (21), if the present model (4) of the dental prosthesis placed on the base material (2) is provided with the magnetic body or magnet (not shown), the electromagnetic force Because the attractive force acts on the magnetic material or magnet (21) of the dental prosthesis main model (4) and the base material (2), the dental prosthesis model (4) can be made more easily and firmly to the base material (2) It can be fixed. As a result, it is possible to prevent the shape of the mold (6) from being broken when the main model (4) of the dental prosthesis is displaced during formation of a double model.
The magnetic body or magnet (21) is, for example, embedded in the base material (2) and disposed at a position not exposed to the surface of the base material (2) on which the main model (4) of the dental prosthesis is placed. It is done.
The position of the magnetic body or magnet (21) is not limited to this, and the present model (4) of the dental prosthesis is fixed to the surface of the base material (2) on which the present model (4) of the dental prosthesis is placed. Can be placed in any position of the base material, as long as it can be fixed at a position where the impression material can be cast and the mold (6) can be made. Also good.
The magnetic body or magnet (21) may be provided integrally with the bottom material (2), or may be provided separately by being bonded with an adhesive or the like.
The material of the magnetic body or magnet (21) is not particularly limited, and ferrite, neodymium, samarium, cobalt, alnico, or a combination thereof, etc. are usually used as a magnetic body or a magnet, as long as it is obvious to those skilled in the art. Any thing can be used.

As shown in FIGS. 1 and 2, the side member (3) has a tubular shape that can be detachably attached to the bottom member (2), and has an opening (33) in the upper surface (31) and the lower surface (32). Made of thermoplastic resin.
Side material (3) is a cylindrical shape that can be detachably attached to the bottom material (2), and can surround the present model placed on the bottom material (2) to form a mold (6) of the impression material (5) It has a size and may have an opening (33) on the upper surface (31) and the lower surface (32), for example, a substantially circular shape in an upper surface view, an elliptical shape, a substantially triangular shape in a top view, a square shape, a pentagonal shape, It may have any shape such as a hexagonal shape.
Further, for example, a plurality of shapes may be combined, such as a substantially circular shape in top view and a substantially triangular shape in bottom view.
The opening (33) on the upper surface (31) side of the side material (3) may be provided over the entire surface of the upper surface (31) of the side material (3). For example, half of the upper surface (31) It may be provided only, and may have a size that allows the impression material (5) to be injected into the flask from the opening (33) of the upper surface (31).

It is desirable that the side material (3) be provided with a fragile portion (34) which can be easily split by applying a force after producing the mold (6). The fragile portion (34) is weaker than the other portions of the side member (3), and is provided intermittently or continuously in the thickness direction of the side member (3).
The fragile part (34) has a straight cut, a notch structure that is a U-shaped or V-shaped cut, a half cut, a perforation, a thin part, and the orientation of the molecules of the side member (3). The fragile portion (34) is weaker than the other portions of the side member (3), for example, by pressing with a finger near the fragile portion (34) to impart weakness or a combination thereof. It may be any structure as long as it can be easily broken by a hand, a tool or the like, such as a structure capable of easily breaking the fragile portion (34) by deformation.
The shape of the fragile portion (34) is not particularly limited. For example, as shown in FIG. 1, it may be provided perpendicular to the upper surface (31) and the lower surface (32) of the side member (3). , Or may be provided in an oblique direction, or may be a combination of these. Further, the number of fragile portions (34) is not particularly limited. For example, even if one fragile portion (34) is provided vertically to the upper surface (31) and the lower surface (32) of the side member (3) You may provide more than one.
That is, one or more weak portions (34) are provided in the vertical direction, the lateral direction, the oblique direction, or one or more directions of the side member (3).
The one or more fragile portions (34) may be provided so that the side material (3) can be easily divided into a plurality of pieces after the mold (6) is manufactured, and the vertical direction of the side material (3) It may be provided continuously or intermittently in the left-right direction, in the oblique direction, or in one or more of these directions, in the shape of a straight line, a curved line, or a combination of straight lines and curved lines.
By providing the fragile portion (34) in the side material (3), the impression material (5) for fluid pattern etc., such as fluid silicone, is injected into the flask (1) according to the present invention and solidified. ) Is produced, the fragile part (34) is broken by applying a force to the fragile part (34) with a hand or a tool, etc., and the side material (3) can be opened, and the side material (3) is easily 3) can be removed from the mold (6) (see FIGS. 3 to 4).
That is, after the mold (6) is produced by providing the fragile portion (34), a force is applied to the fragile portion (34) to make the side member (3) linear, curvilinear, or straight and curved. It can be divided into multiple pieces in a combined shape.

The attachment structure of the side material (3) and the bottom material (2) is not particularly limited, and when the impression material (5) such as fluid silicone is injected into the flask (1) according to the present invention What is necessary is just a structure attached so that an impression material (5) may not leak from an attachment part.
For example, as the structure of the attachment portion, a step portion (22) is provided at a midway portion of the bottom material (2) in the vertical direction, and the bottom surface (32) of the side member (3) is fitted into the step portion (22). Insert the bottom material (2) and side material (3) by screwing the attachment part of the material (2) and side material (3) and screw the bottom material (2) and side material (3) A thin-walled part is provided over the part to form a step (35), and the step (35) of the side member (3) and the step (22) of the bottom material (2) or the bottom material (2) are fitted , The inner diameter of the lower surface (32) of the side member (3) is slightly smaller than the outer diameter of the attachment portion of the bottom member (2), and the bottom member (2) and the side member (3) are fitted Not limited thereto.
As a structure of the above-mentioned attachment part, from the point which can attach side material (3) and a base material (2) easily and strongly, and can prevent the impression material (5) for double models more reliably from an attachment part Most preferably, the bottom structure (2) has a step portion (22) and the side member (3) has a step portion (35) so that the step portion (22) and the step portion (35) are fitted.

The side material (3) is desirably made of a relatively inexpensive thermoplastic resin which is easy to mold and process, has heat resistance, can be split with a hand or a tool, and the like.
More preferably, polystyrene (PS), acrylic (specifically, acrylic resin), polycarbonate (specifically, acrylic resin), polycarbonate (from the viewpoint of easy molding and processing, being capable of being split by hands, tools, etc., and relatively inexpensive) It is desirable to use PC) or a combination thereof as the material of the side member (3).
In addition, by using polystyrene (PS), acrylic, polycarbonate (PC), or a combination thereof having high heat resistance as the material of the side member (3), an impression material for a double model injected into the flask (1) It is also possible to heat the flask (1) itself in order to cure (5) faster. This makes it possible to produce the mold (6) faster than before.
In addition, even if the side material (3) according to the present invention is deteriorated by the above heating, the side material (3) has to be able to withstand one heating because it is disposable.
However, the material is not limited to this, and it is not limited to polystyrene, acryl, polycarbonate, or a combination of these, as long as it is a material that can produce the side material (3) that can be split by hand or tool. Any of polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, Teflon (registered trademark), synthetic resin such as ABS resin, acrylic resin, wood, or a combination thereof can be used.

The thickness of the side material (3) is set by pouring a solid model impression material (5) such as fluid silicone into the flask (1) according to the present invention and solidifying it, and after producing the mold (6) It is desirable that the thickness be such that it is possible to divide.
The desirable thickness depends on the material used as the side material (3), but when using polystyrene, acrylic, polycarbonate, or a combination thereof as the material of the side material (3), the thickness is 0.5 mm to 1.5 mm It is desirable that the distance be 0.8 mm to 1.1 mm.
When the impression material for compound (5) such as fluid silicone is injected into the flask (1) according to the present invention as being smaller than 0.5 mm, the impression material for compound (5) may leak from the attached portion, There is a possibility that the material (3) may be broken, which is not preferable.
If it is thicker than 1.5 mm, a double-model impression material (5) such as fluid silicone is poured into the flask (1) according to the present invention and solidified, and a mold (6) is produced. It is not preferable because it becomes difficult to divide (3).
Therefore, the thickness of the side material (3) in the case of using polystyrene, acryl, polycarbonate, or a combination thereof as the material of the side material (3) is the leakage of the impression material for compound model (5) or the side material (3) It is most desirable that the side material (3) can be easily broken by a hand, a tool or the like within a range of 0.8 mm to 1.1 mm.

It is desirable that the side material (3) has a draft angle (A) which is inclined at 2 degrees to 4 degrees with respect to a normal line (L) extending from the upper surface (31) to the lower surface (32).
As shown in FIG. 3, when the side member (3) is provided with the draft (A), the upper surface (31) of one side member (3A) and the lower surface (32) of the other side member (3B) are overlapped. It can be adjusted.
In addition, although a mode that two side materials of the upper surface (31) of one side material (3A) and the other side material (3B) were piled up is shown in FIG. 3, the number of side materials to overlap is particularly limited. The side materials can be stacked until the height of the stacked side materials reaches a desired height, such as three, four, or five or more.
Further, the inclination angles with respect to the normal line (L) extending from the upper surface (31) to the lower surface (32) of the draft angles (A) of the side materials to be overlapped may be different.
Thereby, when the present model (4) is placed on the flask (1) according to the present invention, the size of the present model (4) is large, so the height of the side material (3) of the flask (1) is If the side material (3) of the flask (1) is overlapped in the upward direction (longitudinal direction), the height of the side material (3) of the flask (1) can be increased (ie, The height of the internal space of the flask (1) can be adjusted), and it is possible to cover this model, which has a size that could not be handled by the conventional non-superimposable flask, with the side material (3). Can be made more easily and precisely.

The inclination angle with respect to the normal (L) extending from the upper surface (31) to the lower surface (32) of the draft (A) is preferably 2 degrees to 4 degrees.
When the upper surface (31) of one side material (3A) and the lower surface (32) of the other side material (3B) are overlapped when the inclination of the draft angle (A) is less than 2 degrees, The degree of overlap between the side material (3A) and the other side material (3B) becomes too small, and it becomes difficult to stably overlap one side material (3A) and the other side material (3B).
When the inclination of the draft angle (A) is greater than 4 degrees, when the upper surface (31) of one side member (3A) and the lower surface (32) of the other side member (3B) are superposed, one side The degree of overlap between the material (3A) and the other side material (3B) is too large, and even if the side materials (3) are stacked, the height of the side material (3) can not be increased much (ie flask The height of the inner space of (1) can not be increased very much), which is not preferable.
Therefore, the inclination angle with respect to the normal line (L) extending from the upper surface (31) to the lower surface (32) of the draft (A) stably overlaps one side member (3A) and the other side member (3B) It is desirable that the angle is 2 degrees to 4 degrees because it is easy and the height of the side material (3) can be greatly increased by stacking the side materials (3).

Below, an example of the preparation procedure of the dental double model using the flask for producing the dental double model concerning this invention is explained in full detail.
In addition, the preparation procedure of the compound double model for dental shown below is an example, It is not limited to this.

First, a dental model is prepared.
Use the tray to mold the shape of the patient's oral cavity (jaw). Then pour plaster into the mold to make a reference model. Pour plaster into a reference model to make this model.
In addition, the preparation procedure of this model is conventionally used, and any preparation procedure obvious to those skilled in the art can be used.

Next, the produced present model is placed on the bottom material (2) of a flask (1) for producing a compound double model for dental use according to the present invention. Then, a double-model impression material (5) such as fluid silicone is poured into the flask (1) (see FIG. 3).
After injecting the impression material for multiple models (5), the inside of the flask (1) is visually observed through the transparent or translucent side material (3), and the model (4) placed in the flask (1) Check the condition such as whether there is any air bubbles in the impression material for multiple models (5), etc., and if necessary correct the position of this model (4) or remove the air bubbles etc. Do the operation of
If there is no defect or the like in the main model (4) or the impression material for compound model (5) placed in the flask (1), the impression material for compound model (5) in the flask (1) will completely harden (hardening) Leave the flask (1) as it is until it does.
In addition, in order to accelerate | stimulate hardening of the impression material (5) for compound models in a flask (1), you may heat a flask (1).

Then, after the impression material for multiple models (5) is completely cured in the flask (1), the side material (3) of the flask (1) is divided by hand or tool, and for multiple models in the flask (1) Remove the side material (3) from the mold (6) produced by completely curing the impression material (5).
The side member (3) is provided with a fragile portion (34), and by applying a force to the fragile portion (34), the side member (3) is more easily broken from the mold (6) and removed. be able to.

Next, the model (4) is removed from the mold (6) removed from the flask (1), and the recess of the mold (6) is filled with an expansive mold material adjusted with a component such as phosphate and solidified. And make a compound model based on the original main model (not shown).
Then, another mold is combined on a double model, and a metal or resin in a high-temperature molten state is poured into the cavity between the two molds to produce a metal or resin denture base or partial denture base (not shown).
The procedure for producing a denture base or partial denture base made of metal or resin from a mold produced using the flask (1) according to the present invention is not particularly limited, and is conventionally used, which is obvious to those skilled in the art Any preparation procedure can be used.

A flask for producing a dental complex model according to the present invention includes a base material having a flat surface on which a main model of a dental prosthesis is placed, and a cylindrical side material which can be detachably attached to the base material. The side member has an opening on the upper surface and the lower surface, is made of a thermoplastic resin, and the side member is provided with a fragile portion having a weaker strength than the other portions of the side member in the thickness direction Therefore, after the impression material for complex model such as fluid silicone is poured into the flask according to the present invention and solidified, and the mold is manufactured, the fragile part is cracked by applying a force to the fragile part with a hand or a tool. The side material of the flask according to claim 1 can be easily removed from the mold.
Therefore, the flask for producing the dental compound model according to the present invention is used, for example, for producing a dental metal or resin denture base or partial denture base. In addition, since the flask for producing the dental complex model according to the present invention can solidify the resin etc. more easily and accurately in the flask, it is also used, for example, in the production of resin figures etc. be able to.

DESCRIPTION OF SYMBOLS 1 flask 2 bottom material 21 magnetic body or magnet 22 step part 3 side material 31 bottom material 31 upper surface 32 lower surface 33 opening 34 fragile part 35 step part 3A of side material one side material 3B other side material 4 impression material 5 impression material 6 Mold A Draft L Normal

Claims

A base material having a flat surface on which the present model of the dental prosthesis is placed;
And a cylindrical side member detachably attachable to the bottom member,
The side material has an opening on the upper surface and the lower surface, and is made of a thermoplastic resin,
The flask for producing a dental double model, wherein the side material is provided in the thickness direction with a fragile portion whose strength is weaker than that of the other part of the side material.
The flask for producing a dental complex model according to claim 1, wherein the thermoplastic resin is polystyrene, acryl, polycarbonate, or a combination thereof.
The dental complex model according to claim 1 or 2, wherein the side material has a draft angle which is inclined at 2 to 4 degrees with respect to a normal extending from the upper surface to the lower surface. Flask for making.
The flask for producing a dental complex model according to any one of claims 1 to 3, wherein the side material is transparent or translucent.
The dental composite model according to any one of claims 1 to 4, wherein the base material is provided with a magnetic body or a magnet for fixing a main model of a dental prosthesis. For the flask.