JP2019088670A - Impression tray - Google Patents

Abstract

To provide an impression tray capable of reducing a running cost and a cost of manufacture.SOLUTION: An impression tray 1 which is an impression tray 1 for holding an impression material for obtaining upper and lower impressions and engagement by being inserted into the oral cavity of a patient and chewed includes a tray body 12 having a frame 16 detachably holding the outer periphery of a screen 20 in which the impression materials are stacked up on upper and lower both surfaces. The frame 16 has a pair of upper frames 1021, 1023 and lower frames 1022, 1024 for holding the screen 20 by pinching the screen 20 from upper and lower both surfaces, and the upper frames 1021, 1023 and the lower frames 1022, 1024 are detachably engaged with each other.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an impression tray for use in obtaining an impression of a patient's dentition or gingiva in the manufacture of a dental prosthesis, particularly for an impression known as a "triple tray" for simultaneously obtaining upper and lower impressions and engagement. On the tray.

  In the field of dental technology, there is known a technique of taking a dental mold called an impression. As a method of taking an impression, insert an impression material such as alginate or silicone onto a device curved along the shape of the oral cavity called an impression tray, and insert it into the patient's oral cavity and use it. There is a way to bite.

  Among them, impression trays called triple trays (for example, Patent Documents 1 to 5) are typically a frame forming the tray and a screen such as a non-woven fabric stretched on the frame to hold the impression material on the tray And. In the triple tray method, impression materials are deposited on both the upper and lower jaw sides of the tray and inserted into the patient's oral cavity, and the patient bites, and the upper and lower impressions and meshing are simultaneously taken. Can be obtained.

Japanese Patent Application Publication No. 2008-508080 JP, 2015-66258, A Japanese Patent Publication No. 11-505750 JP 2007-209575 A JP, 2012-217622, A

  The inventor is studying a technique for producing a work model with an articulator using triple trays.

  For example, a triple tray with impression materials held on both sides is set in the articulator, gypsum is poured into the space on the upper jaw side of the impression, the triple tray is inverted, and gypsum is poured into the space on the lower jaw side. The work model is produced as described above, but the patient's teeth alignment and the shape of the teeth themselves are different among individuals, and it looks like it is crooked or slanted when viewed from the whole face etc. Sometimes it's not very good in terms of aesthetics. Therefore, it is conceivable to take a photograph of the face including the patient's teeth in advance and adjust the work model while looking at this picture when producing the work model, as is commonly practiced conventionally. .

However, in this case, facilities for taking pictures and time for taking pictures are required, and there is a lot of room for the subjectivity of the worker who produces the work model, which is not preferable in terms of accuracy and reproducibility.
The present inventor has proposed a method for producing an impression tray and a working model capable of producing a working model based on an impression material with high accuracy and reproducibility without requiring time and effort.
The present inventor advanced the subsequent development and came to create an impression tray which can reduce the manufacturing cost and the running cost.
Accordingly, it is an object of the present invention to provide an impression tray that can reduce running and manufacturing costs.

  In order to achieve the above object, an impression tray according to an aspect of the present invention is an impression tray for holding an impression material which obtains upper and lower impressions and engagement by inserting into the oral cavity of a patient and biting it. A tray main body having a frame for detachably holding the outer periphery of the screen on which the impression material is placed on both upper and lower surfaces, and the frame is a pair for holding the screen by nipping the upper and lower surfaces of the screen An upper frame and a lower frame, and the upper frame and the lower frame are detachably engaged with each other.

  Running costs can be reduced because it becomes possible to replace the screen and use the impression tray. In addition, since the frame is composed of the upper and lower parts that are detachably engaged, the screen can be easily replaced, the impression tray can be easily manufactured, and the manufacturing cost can be reduced. In addition, the tray for impression concerning one form of the present invention can produce a work model based on an impression material with sufficient accuracy and reproducibility, without requiring effort.

  The upper frame or the lower frame may be provided with a first penetration groove penetrating from the inner wall side to the outer wall side of the frame at a sandwiching end which abuts on the screen to sandwich the screen.

When the impression material is placed on the screen, the impression material flows to the outer wall side through the first through groove, and the impression material flows from the groove to the outer wall on the outer wall side, and the impression material solidifies in that state. As a result, the frame and the screen can be firmly connected via the impression material, and the upper frame and the lower frame can be prevented from being separated from the impression tray.
The upper frame and the lower frame may have the first through groove so as to face each other.

The impression material flows to the outer wall side through the first penetration groove, and the impression material flows from the groove to the outer wall further on the outer wall side. At this time, by having the first through grooves facing each other, the impression material flowing out of these grooves on the side of the outer wall is solidified in a connected state. Thereby, the upper and lower frames are firmly connected via the impression material, and the upper frame and the lower frame can be prevented from being separated from the impression tray.
The upper frame or the lower frame may have, at an end opposite to the sandwiching end, a second penetration groove penetrating from the inner wall side to the outer wall side of the frame.

When the impression material is placed on the screen, the impression material flows to the outer wall side through the second penetration groove, and on the outer wall side, the impression material flows from the groove to the outer wall and solidifies in that state. As a result, the frame and the screen can be firmly connected via the impression material, and the upper frame and the lower frame can be prevented from being separated from the impression tray.
The second through groove has a protrusion at a position near the opposite end, which protrudes into the groove from the groove wall.
This can prevent the solidified impression material from coming off the groove.
The first through groove or the second through groove may be larger from the inner wall side to the outer wall side of the frame.
This can prevent the solidified impression material from coming off the groove.
The upper frame or the lower frame may have a through hole penetrating from the inner wall side to the outer wall side of the frame.

When the impression material is placed on the screen, the impression material flows to the outer wall side through the through hole, and on the outer wall side, the impression material flows from the hole to the outer wall, and the impression material solidifies in that state. As a result, the frame and the screen can be firmly connected via the impression material, and the upper frame and the lower frame can be prevented from being separated from the impression tray.
The hole diameter of the through hole may be larger from the inner wall side to the outer wall side of the frame.
This can prevent the solidified impression material from coming off the holes.
The upper frame or the lower frame may be detachably divided into two or more mutually, and the divided divided frames may be detachably engaged.
This facilitates the manufacture of the impression tray and reduces the manufacturing cost.
An impression tray according to an aspect of the present invention includes the tray main body having the above-described configuration, a guidance mark, and a variable mechanism.
The above-mentioned impression tray holds an impression material for obtaining upper and lower impressions and engagement by inserting into the patient's oral cavity and biting.
The tray main body is formed of a thin film, and has a screen having an engaged portion, and a frame supporting at least a part of the outer periphery of the screen.
The guidance mark unit is connected to the tray main body, and has a ball provided with a hole into which a rod for the guidance mark is inserted, and a holding unit that rotatably holds the ball.
The variable mechanism can change the position of the ball relative to the tray main body.

According to such a configuration of the present invention, the ball is movably provided, and furthermore, the bar for the guidance mark inserted into the hole provided in the ball is rotatably provided. When using the impression and bite of the upper and lower jaws in the oral cavity, move and rotate the ball so that the bar for the guidance mark matches the patient's nasal muscles, and adjust the position and tilt of the bar for the guidance mark It is possible to obtain the positional relationship between the upper and lower jaws of the patient and the nasal muscles. Thus, for example, when producing a working model using an impression tray, it is possible to obtain a working model in which the positional relationship between the upper and lower jaws and the nasal muscles is also reproduced, in addition to the impression and engagement of the upper and lower jaws .
The variable mechanism may have a space portion provided in the guidance mark portion and movable in a state where the ball is held by the holding portion.
Thus, the position of the ball may be made relatively variable with respect to the tray main body by providing the space portion in the guidance mark portion.
The guidance mark may be removable from the tray main body.
As a result, when the impression tray is transported, it is possible to remove the guidance mark from the tray main body, to miniaturize and transport the tray.

The guidance mark portion is provided with the ball and the holding portion at one end, and the variable mechanism is a positioning member which is coupled to the tray main body and can fix the other end of the guidance mark portion at an arbitrary position It is also good.
The guidance mark may further include a rotation stopper for stopping rotation of the ball held by the holder.
Thereby, the inclination of the stick for guidance marks can be fixed at an arbitrary position.

  In the method of producing a working model according to one aspect of the present technology, an impression material is vertically deposited on the screen of the impression tray described above, and the tray main body is inserted into the patient's oral cavity and loaded on the screen The upper and lower impressions and bite are obtained by biting the upper and lower impression materials, and the upper and lower impression materials filled in the screen are bitten and inserted into the holes of the balls for the guidance mark After moving the position of the ball so that the rod corresponds to the nasal muscles of the patient and rotating the ball, the rod for the guidance mark is pulled out from the hole of the ball, and the positioning rod is installed in advance The impression tray with the plaster poured into the impression space of the impression tray in the articulator is installed by inserting the positioning rod into the hole of the ball.

According to such a configuration, since the impression and meshing of the upper and lower jaws in the oral cavity can be obtained using the stick for the guidance mark, the positional relationship between the upper and lower jaws of the patient and the nasal muscles can be acquired. In addition to the impression and meshing of the above, it is possible to obtain a working model in which the positional relationship between the upper and lower jaws and the nasal muscles is also reproduced.
An impression tray according to an aspect of the present invention includes a tray body, a guidance mark, and a variable mechanism.
The above-mentioned impression tray holds an impression material for obtaining upper and lower impressions and engagement by inserting into the patient's oral cavity and biting.
The tray main body is formed of a thin film, and has a screen having an engaged portion and a frame supporting at least a part of the outer periphery of the screen.
The guidance mark is connected to the tray main body, and a rod for the guidance mark is rotatably pivoted.
The variable mechanism can change the position of the ball relative to the tray main body.
As described above, the rod for the guidance mark may be rotatably attached to the guidance mark portion.

  According to the present invention, running costs and manufacturing costs can be reduced.

It is a perspective view of the tray for impressions concerning a 1st embodiment of the present invention. It is a typical top view of an impression tray shown in Drawing 1, a bottom view, and a side view. It is a schematic rear view of the tray for impressions shown in FIG. It is sectional drawing cut | disconnected by line IV-IV of FIG. 2 (A). It is a disassembled perspective view of the tray main body which concerns on one Embodiment of this invention. FIG. 6 is a perspective view of the tray main body shown in FIG. 5 after assembly. It is a fragmentary side view showing the modification of the 2nd penetration slot of the tray main part concerning one embodiment of the present invention. It is a fragmentary top view showing the modification of the 1st penetration groove of the tray main part concerning one embodiment of the present invention. It is a typical side view of an articulator. It is a schematic front view of the articulator shown in FIG. It is a figure which shows a patient's mouth adding the tray for impressions shown in FIG. 1, and taking an impression in the oral cavity, in order to produce the model of upper and lower jaw. It is a figure which shows the manufacturing method of the cast of an upper and lower jaw using the tray for impressions shown in FIG. 1, and a mode that the cast of an upper and lower jaw is produced using the articulator shown in FIG. It is a side view of the working model which installs the model of the upper and lower jaw manufactured using the tray for impressions shown in FIG. 1 in the articulator shown in FIG. It is a schematic plan view of the tray for impressions concerning a 2nd embodiment. It is a schematic plan view of the tray for impressions concerning a 6th embodiment. It is a schematic plan view of the state which opened the cover-like member of the positioning member of the tray for impressions shown in FIG. It is a state which closed the cover-like member of the positioning member of the tray main body of the tray for impressions shown in FIG. 15, Comprising: It is a typical side view which shows the state which spaced apart the tray main body and the guidance mark part. It is a fragmentary sectional view of the tray for impressions cut | disconnected by line XV-XV of FIG. FIG. 16 is a partial rear view of the impression tray showing a state in which the lid-like member of the positioning member of the impression tray shown in FIG. 15 is opened. FIG. 16 is a partial rear view of the impression tray showing a state in which the lid-like member of the positioning member of the impression tray shown in FIG. 15 is closed. It is a figure which shows a mode that a patient adds the tray for impressions which concerns on 7th Embodiment to a mouth, and produces the impression in an oral cavity, in order to produce the model of upper and lower jaw. It is a figure which shows the tray for impressions which concerns on 8th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First Embodiment
[Structure of tray for impression]

  1 to 4 are views showing an impression tray 1 according to an embodiment of the present invention. FIG. 1 is a perspective view of the impression tray 1, FIG. 2 is a schematic plan view, a bottom view and a side view thereof, and FIG. 3 is a rear view of the impression tray 1. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2 (A).

  The impression tray 1 is a triple tray that takes three impressions of upper and lower jaws and occlusion, and is a tray that is supposed to take the entire dental arch. The impression tray 1 is configured to be able to hold an impression material for obtaining an impression by inserting it into the oral cavity of a patient and biting it.

In the present embodiment, a silicone impression material such as vinylpolysiloxane (VPS) or super hydrophilic VPS is used as an impression material. However, the present invention is not limited to this, and alginate impression materials and other impression materials can be used.
The impression tray 1 includes a tray main body 12, a guidance mark 11, a rod 14 for guidance mark, a ball 15, and a fixing screw 13 as a rotation stopper.
The tray body 12 has a frame 16 and a screen 20.

  The frame 16 is an arcuate frame, and typically includes an outer frame 16a and an inner frame 16b. The outer frame 16a is positioned on the buccal side when inserted into the patient's oral cavity, and the inner frame 16b is positioned on the tongue side when inserted into the patient's oral cavity. The frame 16 supports at least a portion of the periphery of the screen 20. The frame 16 detachably supports the screen 20. Thereby, the screen 20 can be replaced, and the frame 16 can be reused.

  The outer frame 16a and the inner frame 16b of the frame 16 are typically formed of a resin material. Preferably, at least one of the outer frame 16a and the inner frame 16b has good adhesion to the impression material. This makes it possible to easily hold the impression material on the impression tray 1 by the adhesion between the outer frame 16a or the inner frame 16b and the impression material even when the adhesion between the screen 20 and the impression material is not good. It is for. The impression material is dislocated or peeled off from the impression tray 1 on at least one of the wall surface 116a directed to the inner frame 16b of the outer frame 16a and the wall surface 116b directed to the outer frame 16a of the inner frame 16b. Irregularities may be formed to prevent this.

  The screen 20 is provided to act as a base for holding the impression material, and is formed of, for example, a thin film of a polyurethane resin film. The screen 20 is connected to and supported by the frame 16. In this embodiment, the screen 20 is stretched on the frame 16 by connecting one edge of the screen 20 to the outer frame 16 a and connecting the other edge to the inner frame 16 b. It is preferable that the screen 20 be stretched in a relaxed state so as not to generate a large repulsive force when biting for obtaining an impression.

  The screen 20 has an occlusal portion. The occlusal part is an area of the screen 20 set so as to include a part where the upper and lower teeth of the patient are engaged at the time of obtaining an impression (at the time of occlusion). That is, the occlusal portion is a region occupying the central portion of the screen 20, and is a region which is conveniently defined so that the positions of the teeth at the time of obtaining an impression fall within the range of the occlusal portion. The range of the occlusal portion is not particularly limited, and may be appropriately set according to the shape of the impression tray 1 or the like.

  The occlusal portion is non-porous, and the thickness of the occlusal portion is 20 μm or less. For example, existing triple trays include mesh screens or screens made of Japanese paper that the occlusal portion is non-porous, but such a screen has a structure with holes. On the other hand, the above-mentioned occlusion part is that it is constituted by one sheet of membrane which does not have a hole.

  As a resin film which is a material of the screen 20, typically, a polyurethane resin film formed of water-based polyurethane can be used. The polyurethane resin film is excellent in extensibility and has sufficient strength even if the thickness is 20 μm or less, so it is suitable for forming a non-porous interlocked portion having a thickness of 20 μm or less. Moreover, it is hard to produce reaction force which becomes obstruction of occlusion at the time of occlusion for impression acquisition, and it has an advantage of being hard to tear. However, the material of the resin film is not limited to this, and other materials such as silicone can be used. The thickness of the resin film is more preferably about 10 μm. This makes it possible to more accurately reproduce the engagement and the like.

  At least the occlusal portion of the screen 20 includes a pigment having light reflectivity. As this pigment, one having safety sufficient for use in medical products is used. The pigment may be contained in the material of the polyurethane resin, or may be attached to the resin film surface by spraying or application. Dyeing can typically be done by powdering titanium oxide

  In the present embodiment, the screen 20 has a peripheral portion set around the occlusal portion as a region other than the occlusal portion. The peripheral area is an area where the patient's teeth are less likely to be engaged when an impression is taken. For example, an area near the frame 16 away from the center of the screen 20 may be taken as the periphery. The peripheral portion has an action of receiving an impression material pushed around the teeth when taking an impression.

  In the present embodiment, a bonding area is provided in the peripheral portion. The adhesion area is an area for adhering an impression material by an adhesive. That is, the adhesion area is an area to which an adhesive capable of adhering the impression material is applied. The bonding areas are provided on both the upper and lower jaw surfaces of the screen 20. The bonding area may be the entire periphery or a part of the periphery.

  The adhesive is applied to the impression tray to strengthen the adhesion between the tray and the impression material, and is used to prevent peeling and deformation of the impression material. As the adhesive, for example, a known adhesive for dental tray such as a commercially available tray adhesive (for addition type silicone) (manufactured by 3M Japan Co., Ltd.) may be appropriately selected and used.

  As a method of adhering the impression material to the screen 20 with an adhesive, a worker thinly applies an adhesive to the adhesive area on both sides of the screen 20 with a brush or a cotton ball immediately before using the impression tray 10 Dry well and then serve the impression material. However, the present invention is not limited to this, and for example, an adhesive may be applied to the bonding area in advance.

  The appearance of the bonding area is, for example, that outlines, marks, etc. are attached to indicate a rough adhesive application range, and it is for the operation such as application of adhesive by a worker or application of an impression material by a worker. preferable. However, the form of the screen 20 having the bonding area is not limited to this. For example, the application range of the adhesive may be arbitrarily determined by the operator, or the boundary between the bonding area and the other area may not be apparent in appearance.

  The adhesion area is provided for the following reasons. When the screen 20 is formed of a polyurethane resin film, since the silicone impression material is difficult to adhere to the polyurethane resin film, the impression material may be easily peeled from the screen 20 and it may be difficult to hold the impression material. So, in this embodiment, in order to make it easy to hold an impression material on the screen 20, the impression material is adhered to the screen 20 with an adhesive. According to this configuration, by applying the adhesive to the bonding area of the peripheral portion, the impression material can be bonded to the screen 20 around the interlocked portion and easily held.

  Here, it is preferable that the bonding area is not provided in the occlusal portion but only in the peripheral portion. When an adhesive is applied to the screen 20 when the impression tray 1 is used, the thickness will increase by the thickness of the adhesive. According to this configuration, since the thickness of the adhesive increases only at the peripheral portion having the bonding area, the impression tray 1 can be used while the thickness of the engaged portion is 20 μm or less . As a result, in the peripheral portion, adhesion with the impression material can be strengthened by the adhesive and the impression material can be held. On the other hand, the occlusal portion is sufficiently thin against the deformation of the impression material because the thickness is sufficiently thin. Since no reaction force is generated, peeling of the impression material from the screen 20 as a whole can be prevented.

  In addition, you may provide the hole (illustration is abbreviate | omitted) which penetrates the front and back of the screen 20 in a peripheral part. Although it is preferable to have a plurality of such holes along the periphery, it may be one. The impression material placed on the surface side of the screen 20 and the impression material placed on the back side of the screen 20 are in direct contact with each other through the holes and adhered, and the impression material is screened around the to-be-engaged part in the same manner as described above. It can be easily held at 20. The bonding area may also contain in advance an adhesive component capable of bonding the impression material. In this case, for example, the adhesive region may be formed by containing the same component as the above-described adhesive only in the peripheral portion of the screen 20 avoiding the interlocked portion. Alternatively, components similar to the above-described adhesive may be applied in advance to the adhesive areas on both surfaces of the screen 20. Furthermore, the screen 20 may not be provided with a bonding area. When the adhesion area is not provided on the screen, the impression material may be held on the impression tray by, for example, adhering to the frame. Alternatively, the impression tray may be used by applying an adhesive to a part of the occlusal part, as long as it does not interfere with the acquisition of the impression and does not impair the accuracy and safety of the impression.

  The tray main body 12 is attachable to and detachable from the guidance mark unit 11. As an example, the tray main body 12 can be attached to and detached from the guidance mark 11 by engaging the base portion of the tray main body described later with a recess provided in the guidance mark 11. Can be configured to be

FIG. 5 is an exploded perspective view of the tray main body 12 according to the embodiment of the present invention, and FIG. 6 is a perspective view of the tray main body 12 after assembly. The tray main body 12 according to this embodiment has a configuration in which the guidance mark unit is detachable from the tray main body as in the third embodiment (see FIG. 14) described later. Then, the tray main body 12 may be used as an impression tray according to the present invention.
The tray main body 12 has a frame 16 for detachably holding the outer periphery of the screen 20 on which the impression material is placed on the upper and lower surfaces.

  The frame 16 is composed of frames 1021 to 1024 divided into four in the left, right, upper and lower. For the sake of convenience, the upper right frame 1021 is the upper right, the lower right frame 1022 is the lower right, the upper left frame 1023 is the upper left, and the lower left is the lower left frame 1024 when viewed from the front.

  The upper right frame 1021 and the upper left frame 1023, and the lower right frame 1022 and the lower left frame 1024 are held by the upper and lower surfaces of the screen 20 to hold the screen 20. Also, the lower right frame 1022 and the lower left frame 1024 are detachably engaged, and the lower right frame 1022 and the upper right frame 1021 are detachably engaged, and the left frame 1024 and the upper left frame 1023 are detachable It is engaged.

A plurality of protrusions 1022 b and 1024 b are respectively provided on a sandwiching end 1022 a facing the upper right frame 1021 of the lower right frame 1022 and a sandwiching end 1024 a facing the upper left frame 1023 of the lower left frame 1024. On the other hand, a plurality of holding ends 1021a corresponding to the lower right frame 1022 of the upper right frame 1021 and a holding end 1023a corresponding to the lower end frame 1023 of the upper left frame 1023 correspond to the projections 1022b and 1024b. (Not shown).
The lower right frame 1022 has a base 1022d. The base portion 1022d is provided with a pair of protruding portions 1022b and concave portions 1022c in left-right symmetry as viewed from the front.

  The lower left frame 1024 also has a base 1024d. The base 1024 d is also provided with a pair of protrusions 1024 b and recesses 1024 c in left-right symmetry as viewed from the front.

  By engaging the protrusions 1022 b and 1024 b with the recesses 1022 c and 1024 c (including the recesses not shown), the frames 1021 to 1024 divided into four in the left, right, upper and lower directions are engaged in a removable manner.

  In the upper right frame 1021 and the upper left frame 1023, and the lower right frame 1022 and the lower left frame 1024, parts can be made common by turning over the parts which are the same structure, and using the same parts. Can be reduced.

  The upper right frame 1021 and the upper left frame 1023 and the lower right frame 1022 and the lower left frame 1024 penetrate from the inner wall 102a side of the frame 16 to the outer wall 102b side in sandwiching ends 1021a to 1021a that abut the screen 20 and sandwich the screen 20 A first through groove 104 may be provided.

  The first through grooves 104 in the upper right frame 1021 and the upper left frame 1023 and the first through grooves 104 in the lower right frame 1022 and the lower left frame 1024 are provided to face each other.

  The upper right frame 1021 and the upper left frame 1023 and the lower right frame 1022 and the lower left frame 1024 pass from the inner wall 102 a side to the outer wall 102 b side of the frame 16 at the ends 1021 e to 1024 e opposite to the sandwiching ends 1021 a to 1024 a. The through groove 105 is provided.

Note that, as shown in FIG. 7, the second through groove 105 may have a protrusion 105 c at a position near the opposite end 1021 e to 1024 e, which protrudes from the groove wall 105 a into the groove 105 b. Further, as shown in FIG. 8, the first through groove 104 or the second through groove 105 may be larger from the inner wall 102 a side of the frame 16 toward the outer wall 102 b side. Furthermore, the frames 1021 to 1024 may have through holes (not shown) penetrating from the inner wall 102a side of the frame 16 to the outer wall 102b side. In this case, the hole diameter of the through hole may increase from the inner wall 102 a side of the frame 16 toward the outer wall 102 b side.
In the present embodiment, the frame 16 is divided into four in the left and right and up and down, but it may be a frame divided into 2 in up and down, for example.

  The instruction mark unit 11 includes a connecting portion 111 and a ball setting portion 112. The guidance mark unit 11 is connected to and fixed to the tray main body 12. The guidance mark 11 is disposed so as to protrude from the tray main body 12. When the impression and bite of the upper and lower jaws in the oral cavity are acquired using the impression tray 1, the model of the upper and lower jaws is manufactured, the occlusal adjustment is performed, etc. It becomes the held part.

  The connection portion 111 of the guidance mark portion 11 is provided between the ball setting portion 112 and the tray main body 12 and connects the both. The connecting portion 111 is configured such that the width in the Y-axis direction is narrower than the width of the tray main body 12 and the width of the ball mounting portion 112.

  The ball setting portion 112 of the guidance mark portion 11 has an arcuate planar shape. The ball setting unit 112 has a space 17. The ball setting portion 112 is provided with a fixing screw 13 which allows the ball 15 to move in the space portion 17 in a rotatable state, a plate member 19 and a pair of guide rails 50 and 51.

  The ball 15 has a through hole 151 into which a bar 14 for a guidance mark is inserted. The rod 14 for the guidance mark is configured to be insertable and removable from the through hole 151. By inserting the rod 14 for guidance mark into the through hole 151 of the ball 15 and rotating the ball 15 about the center of the ball 15, the inclination of the rod 14 for guidance mark can be adjusted.

  The space portion 17 provided in the ball installation portion 112 has a shape obtained by bending an elongated substantially cylindrical shape into an arch shape, and the cross-sectional shape orthogonal to the XY plane along the longitudinal direction of the space portion 17 is substantially circular. . The space 17 is a space in which the ball 15 can move, and the diameter of the substantially circular cross section of the space 17 is larger than the diameter of the ball 15. The ball 15 is movable in the space portion 17 while being held rotatably by a holding portion 131 of a fixing screw 13 described later. Further, the space portion 17 is a first open space 171 opened in the upper surface 112 a of the ball installation portion 112, a second open space 172 opened in the curved side surface 112 b of the ball installation portion 112, and a lower surface of the ball installation portion 112 It is spatially connected to the third opening space 173 opening at 112 c.

  The first opening space 171 has a shape obtained by bending an elongated substantially rectangular parallelepiped into an arch shape, and a cross-sectional shape orthogonal to the XY plane along the longitudinal direction is substantially rectangular. The cross-sectional shape of the first open space 171 cut along a plane parallel to the XY plane is arched, and the width thereof is smaller than the diameter of the ball 15, whereby the ball 15 is moved from the space 17 to the impression tray. There is no detachment out of 1.

  The rod 14 for the guidance mark is configured to protrude from the elongated opening 181 formed in the upper surface 112 a by the first opening space 171. By moving the ball 15 in a state in which the rod 14 for guidance mark is inserted into the through hole 151 in the space portion 17, teaching within the first opening space 171 is made to bow along the arched space portion 17. The rod 14 for the mark moves.

  The second open space 172 has a shape obtained by bending an elongated substantially rectangular parallelepiped into an arch shape, and a cross-sectional shape orthogonal to the XY plane along the longitudinal direction thereof is substantially rectangular. The opening 182 formed in the side surface 112 b of the ball placement portion 112 by the second opening space 172 has a rectangular shape, and the longitudinal length thereof is smaller than the diameter of the ball 15. As a result, the ball 15 is not detached from the space 17. The screw portion 132 of the fixing screw 13 described later is movable in the second opening space 172.

  The third opening space 173 has a shape obtained by bending an elongated substantially rectangular parallelepiped into an arch shape, and the cross-sectional shape orthogonal to the XY plane along the longitudinal direction thereof is substantially rectangular. The cross-sectional shape of the third open space 173 cut along a plane parallel to the XY plane is arched, and the width thereof is smaller than the diameter of the ball 15, whereby the ball 15 is moved from the space 17 to the impression tray. There is no detachment out of 1.

  The fixing screw 13 has a holding portion 131, a screw portion 132, and a knob 133. The holding portion 131 is positioned at the tip end which is one end of the fixing screw 13, the knob 133 is positioned at the head which is the other end, and the screw portion 132 is positioned between the holding portion 131 and the knob 133.

  The holding portion 131 has a bowl shape covering a part of the surface of the ball 15. The holder 131 holds the ball 15 rotatably and movably in the space 17 without detaching the ball 15 from the holder 131. In the fixing screw 13, the holding portion 131 is positioned in the space portion 17, the screw portion 132 is positioned through the second space portion 172 and the plate-like member 19 described later outside, and the knob 133 is the opening portion 182. Protruding from and located outside.

  The ball 15 is rotatably held by the holding portion 131 and the space portion 17 without being detached from the holding portion 131. In conjunction with the movement of the knob 133, the holding portion 131 coupled to the knob and the ball 15 held by the holding portion 131 move in the space portion 17.

  As described above, the impression tray 1 is provided with the space portion 17 movable in the state where the ball 15 is held by the holding portion 113 in the guidance sign portion 11, and the position of the ball 15 is relative to the tray main body 12. And a variable mechanism that makes it possible to

  The plate-like member 19 has a rectangular planar shape and has a through hole at its central portion. A female screw portion is provided on the inner wall surface of the through hole. The screw portion 132 of the fixing screw 13 is inserted into the through hole. The plate-like member 19 is used together with the fixing screw 13 to fix the position of the positioned ball 15. By providing the female screw portion in the through hole of the plate-like member 19, the plate-like member 19 is prevented from freely rotating with respect to the fixing screw 13. The plate member 19 is configured to be movable in conjunction with the fixing screw 13.

  The pair of guide rails 50 and 51 are provided on the side surface 112 b one by one up and down across the opening 182. The pair of guide rails 50 and 51 respectively support the pair of opposite side surfaces of the plate member 19 so that the plate member 19 can move along the side surface 112 b.

  As shown in FIG. 3 and FIG. 4, when positioning the ball 15, the user moves the knob 133 in the XY plane by the user so that the ball 15 is held by the holding portion 131 in a rotatable state. Move the inside on the XY plane. Then, the ball 15 is rotated by changing the inclination of the bar 14 for the instruction mark by the user, and the position of the through hole 151 is changed.

  When taking impressions (upper and lower jaw teeth) and bite in the oral cavity by biting the impression tray 1 holding the impression material in the patient's oral cavity, the patient's nasal muscles and guidance mark The ball 15 is moved in the XY plane so that the bar 14 matches, and the tilt of the bar 14 is adjusted to position the ball 15, and the bar for the patient's nasal muscles and the bar The ball 15 is fixed at the position where it matches the position 14.

  When positioning the ball 15 and fixing the position of the ball 15, as shown in FIG. 4, the fixing screw 13 is pushed toward the space 17 so that the ball 15 contacts the inner wall of the space 17. The fixing screw 13 is tightened to fix the ball 15 in a state where the rod-like member 19 is in contact with the side surface 112 b of the ball mounting portion 112. Thereby, the ball 15 is fixed in the positioned state.

  As described above, in the present embodiment, the provision of the space portion 17 enables the position of the ball 15 to be moved within the space portion 17, and the ball 15 is rotatably held so that the through holes 151 of the ball 15. It is possible to adjust the inclination of the bar 14 for the guidance mark inserted in the. As a result, when taking impressions and engagement of upper and lower jaws in the oral cavity using the impression tray 1, the position of the ball 15 is moved and the bar is rotated, so that the bar for the guidance mark and the nasal muscles coincide. As you can adjust the position of the bar for guidance marks.

  Then, a gypsum model is manufactured based on the impression material obtained using the impression tray to which the positioned balls 15 are fixed. Thereby, for example, even if the condition in the oral cavity of the patient is such that the center of the dentition is offset with respect to the nasal muscles or the boundary between the upper and lower jaws is not substantially perpendicular to the nasal muscles, It is possible to produce a plaster model in which the positional relationship between the center and the nasal muscles and the inclination of the jaws are accurately reproduced.

The tray body 12 and the guidance mark 11 are formed of the same material, for example, plastic, aluminum, stainless steel or the like. Moreover, the material used for the screen 20 is not limited to urethane, For example, Japanese paper etc. may be used.
[Composition of articulator]

  The manufacture of a plaster model of the upper and lower jaws, the manufacture of a dental prosthesis, and the configuration of an articulator used in occlusion adjustment will be described with reference to FIGS. 9 and 10. FIG. 9 and 10 are a schematic side view and a front view, respectively, of the articulator 4.

  The articulator 4 reproduces the movement of the jaw. The articulator 4 comprises a lower frame 41, an upper frame 42, a support 47, a lower jaw support 43, an upper jaw support 44, an incisal pin 46 which is a positioning rod, and an upper jaw support screw 48. And a screw 49 for the incisal pin.

  The lower frame 41 is fixed to the support portion 47, and the lower jaw support 43 is disposed on the lower frame 41. The upper frame 42 is installed on the support column 47 via the shaft 45 and configured to be rotatable about the shaft 45. An upper jaw support 44 is disposed on the upper frame 42. The upper jaw support 44 is movable in the thickness direction of the upper jaw support 44 by the upper jaw support screw 48. In the articulator 4, a model of the lower jaw is installed in the lower jaw support portion 43, a model of the upper jaw is installed in the upper jaw support portion 44, and it is used as a work model to enable occlusal adjustment and the like.

The incisal pin 46 is provided such that its longitudinal direction is orthogonal to the horizontal plane when the plane of the upper frame 42 and the upper jaw support 44 is arranged to be parallel to the horizontal plane (XY plane). The incisal pins 46 are inserted into the through holes 151 of the positioned balls 15 of the impression tray 1 when producing the upper and lower plaster casts using the impression tray 1 described above. The incisal pin 46 is a positioning bar that determines the position of the impression tray 1 relative to the articulator 4. The incisal pin 46 is movable along the longitudinal direction by an incisal pin screw 49 so that the length of projection from the upper frame 42 can be adjusted.
[Method of producing a dental prosthesis using an impression tray]

A method of manufacturing a dental prosthesis using the above-described impression tray 1 will be described. In the present embodiment, the case of producing, for example, a silver crown as a dental prosthesis will be described as an example. In the following, the impressions of the upper and lower in the mouth (shape of upper and lower teeth) and the method of meshing using the impression tray in order, the impression material from which the upper and lower impressions and mesh in the oral were taken A method of producing a plaster model of upper and lower jaws used and a method of producing a dental prosthesis using a plaster model will be described.
(How to get an impression in the oral cavity)

FIG. 11 is a view showing how the patient adds an impression tray to his / her mouth and takes impressions and engagements of the upper and lower jaws in the oral cavity. FIG. 11 (A) is a front view of a patient, and FIG. 11 (B) is a side view of the patient.
First, the tray body 12 of the impression tray 1 in which upper and lower impression materials are filled on both sides of the screen 20 is inserted into the oral cavity of the patient 2 and the patient 2 bites it.

  The doctor or dental hygienist who holds the impression tray 1 views the face of the patient 2 from the front, and as shown in FIG. The knob 133 is moved to the left and right so as to correspond to the No. 2 muscle A to move the position of the ball 15 having the through holes 151 into which the instruction rod 14 is inserted, and further, the instruction rod 14 The ball 15 is rotated starting from the center of the ball 15 to adjust the inclination of the bar 14 for the instruction mark.

  The doctor or dental hygienist pushes the fixing screw 13 toward the space 17 so that the ball 15 contacts the inner wall of the space 17 at the position where the nose muscle A and the rod 14 for guidance mark coincide with each other. The fixing screw 13 is tightened to fix the ball 15 in a state where the rod-like member 19 is in contact with the side surface 112 b of the ball mounting portion 112. Thereby, the ball 15 is fixed in the positioned state.

Then, while maintaining the state in which the nose muscle A and the bar 14 for the guidance mark coincide, the process waits until the impression material hardens. After the impression material hardens, the rod 14 for guidance mark is removed from the through hole 151 of the ball 15 and the impression tray 1 is taken out from the oral cavity of the patient 2. Thereby, the impression and meshing of the upper and lower jaws are obtained.
(Method of making plaster model of upper and lower jaw)
Next, a plaster model is manufactured by a dental technician using the impression tray 1 holding the impression material obtained by the above-described impression acquiring method.

  Generally, an impression material from which an intraoral impression has been obtained by a doctor or dental hygienist is transported to a dental laboratory, and a dental technician makes a gypsum model and produces a dental prosthesis using this gypsum model. To be done. The dental prosthesis produced by the dental technician is delivered to the doctor.

The impression tray 1 is transported to the dental laboratory with the bar 14 for the guidance mark removed from the ball 15. As described above, since the rod 14 for guidance mark is transported in a state of being pulled out, the delivery can be miniaturized. Also, the impression tray 1 may be transported in a state in which the bar 14 for the guidance mark is inserted, but in this case, the ball for which the bar 14 for the guidance mark collides with something during transportation and is fixed It may be packaged so that the position of 15 does not shift.
Hereinafter, the manufacturing method of a gypsum model is demonstrated using FIG.12 and FIG.13.
FIG. 12 shows how a plaster model of upper and lower jaws is produced using the above-mentioned articulator 4, and FIG. 13 shows how a plaster model of the upper and lower jaws produced is installed in the articulator 4. As shown in FIG.

  First, the sheet is attached to the frame 16 so that the impression materials 23a and 23b with the impressions of the upper and lower jaws surround the substantially bowed frame 16 of the impression tray 1 held on both sides of the screen 20 respectively. At this time, the sheet is disposed so as to protrude from the impression material 23 a and the impression material 23 b in the Z-axis direction. Thereby, the space surrounded by the walls formed by the impression materials 23a and 23b of the upper and lower jaws and the sheet is formed.

  Next, gypsum 25a is poured into the space formed by the impression material 23a of the upper jaw and the sheet, and the gypsum 25b is also flushed into the space formed by the impression material 23b of the lower jaw and the sheet. Next, as shown in FIG. 12, the incisal pin 46 is inserted into the through hole 151 of the ball 15 before the gypsum 25 a and 25 b is completely cured, and is provided detachably on the upper jaw support 44 of the articulator 4. For the impression so that the rubber upper jaw side base 31 and the gypsum 25a come into contact with each other and the rubber lower jaw side base 32 detachably provided on the lower jaw support portion 43 of the articulator 4 and gypsum 25b Place the tray 1 in the articulator 4. Maintaining this state, it waits until the gypsum 25a and 25b hardens.

  After production of the upper and lower plaster models 25a and 25b, as shown in FIG. 13, the impression tray 1, the upper impression material 23a and the lower impression material 23b are removed, and the lower base 32, the lower plaster model 25b, and the upper jaw The working model 25 comprising the plaster model 25a and the upper jaw side base 31 is completed. Since this working model 25 is manufactured by inserting the incisal pin 46 into the through hole 151 of the positioned ball 15 of the impression tray 1 and curing the plaster, the positional relationship between the patient's nasal muscles and the upper and lower jaws Is exactly what was reproduced.

  As described above, in the present embodiment, since the triple-tray impression tray is used, meshing can be obtained together with the upper and lower impressions in the oral cavity. Then, a plaster model of the upper and lower jaws is manufactured in a state where the impression material from which the upper and lower impressions and the meshing are obtained is held in the impression tray, and therefore a working model in which the upper and lower impressions and meshing are accurately reproduced. You can get

Furthermore, a stick for guidance mark is provided on the impression tray to acquire the positional relationship between the patient's nasal muscles and upper and lower jaws, and this positional relationship is reproduced using the incisal pin of the articulator to produce a working model, The positional relationship between the nasal muscles and the upper and lower jaws can be accurately reproduced, and a working model can be obtained which more accurately reproduces the facial features of the patient. For example, even if the center of the dentition is offset with respect to the nasal muscles, or the boundary between the upper and lower jaws is not substantially perpendicular to the nasal muscles, the offset or inclination of the center of the dentition can also be reproduced. A plaster model can be produced in which the positional relationship between the nasal muscles and the center of the dentition and the inclination of the jaws are reproduced.
(Method of manufacturing dental prosthesis using working model)
A method of manufacturing a silver crown (dental prosthesis) using the work model 25 installed in the above-described articulator 4 will be described.

  First, from the produced working model 25, a part of a tooth to be covered with a crown is cut out. Dowel pins are planted on the surface of the partial plaster cast of the tooth to be covered, which was to be covered with the cut crown. Also, in the base, a hole into which the dowel pin is inserted is formed.

  Next, wax is applied to the teeth of the partial gypsum model of the tooth to be covered with the crown, and the waxed partial gypsum model is returned to the working model 25 installed in the articulator 4. Then, move the gypsum model 25a of the upper jaw with the articulator 4 to reproduce the movement of the jaw, and confirm the meshing between the tooth to be covered with the crown and the other teeth, the harmony with the surroundings, the condition of the gums, etc. Carefully form a wax pattern in the shape of a tooth, scraping the wax or replenishing the wax.

  Next, the wax pattern is buried in a mold as a mold and heated at high temperature. This causes the wax to melt and form a mold in which the portion where the wax pattern is present becomes hollow. Thereafter, a molten metal, here silver, is poured into the cavity, cooled, the metal is removed from the mold material, and the surface is polished to complete the crown.

  Next, the manufactured crown is put on a partial gypsum model of the tooth to be covered with the crown, and this is returned to the working model 25 installed in the articulator 4 to adjust the contact state with the adjacent teeth or to engage The plaster model of the upper jaw is moved with the bowl 4 to reproduce the movement of the jaws and scrape the surface of the crown while observing the meshing, etc., adjusting the fine grooves of the crown, etc. to produce a crown.

  As described above, in the present embodiment, an impression is obtained using the impression tray 1 provided with the bar 14 for the guidance mark, and the through holes 151 of the balls 15 positioned using the bar 14 for the guidance mark. Since the working model 25 is manufactured by inserting the incisal pin 46 of the articulator 4 into the above, the reproducibility of the impression and engagement of the upper and lower jaws is high. In addition, since it is not necessary to produce a working model while looking at a patient's face picture, it is possible to obtain a working model in which the positional relationship between the patient's nasal muscles and the jaw is accurately reproduced without the need for time and effort. Then, since a dental prosthesis is manufactured using a working model in which such a feature in the patient's oral cavity is reproduced, it is possible to produce a dental prosthesis suitable for the condition in the patient's oral cavity.

As mentioned above, although the embodiment of the present invention was described, the present invention is not limited only to the above-mentioned embodiment, and it goes without saying that various modifications can be added without departing from the scope of the present invention. Explain to.
Second Embodiment

  In the above embodiment, plaster was poured into the obtained impression to produce a plaster model of the upper and lower jaws, but the obtained impression is directly read by a CAD / CAM system, and a working model is produced using 3D printer technology. You can also Specifically, the impression tray 1 is used to obtain the patient's impression, and while the impression material is held in the impression tray 1, the impression surface is an optical reading means based on the bar for the guidance mark. to scan.

  As a technique which manufactures a dental prosthesis using a CAD / CAM system currently known, the technique described in Unexamined-Japanese-Patent No. 2007-209575, 2012-217622 grade etc. is mentioned, for example.

The CAD / CAM system takes scanned 3D data into CAD, designs a working model in which the positional relationship between the patient's nasal muscles and the jaw is accurately reproduced by CAD, and sends the design data to the CAM. Then, a working model is produced by CAM and finishing is performed.
Third Embodiment

  Further, although the above-described impression tray 1 is configured by connecting and fixing the tray main body 12 and the instruction mark 11, as in the impression tray 201 shown in FIG. 14, the instruction mark 211 is a tray main body 212. It is good also as composition removable from these. In FIG. 14, the same components as those of the impression tray 1 are denoted by the same reference numerals, and the description thereof is omitted. Further, the configuration in which the tray main body has a screen and a frame is the same as that of the above-described impression tray 1, and the description thereof is omitted here.

As shown in FIG. 14, the impression tray 201 has a tray main body 212 and a guidance mark portion 211 connected to the tray main body 212. The guidance mark portion 211 is provided with a fixing screw 13 at one end, and a protrusion 211 a at the other end. The tray main body 212 is provided with a recess 2121 capable of inserting and removing the protrusion 211 a, and the guidance mark 211 is detachable from the tray main body 212. As a result, when the impression tray holding the impression material is transported, it is possible to remove the guidance mark portion 211 from the tray main body 212 and to miniaturize the tray for transportation.
Fourth Embodiment

In the above-mentioned embodiment, although the rod 14 for guidance marks was comprised so that attachment or detachment was possible from the ball | bowl 15, the rod for guidance marks may be fixed to the ball 15. FIG. Under the present circumstances, the stick | rod for guidance marks penetrates the ball | bowl 15, and it becomes a shape where the stick | rod for guidance marks protrudes from each of two opening which forms the through-hole 151. As shown in FIG. The rod for the instruction mark may be rotatably pivoted to the instruction mark unit connected to the tray main body in this manner. When producing a work model using an impression tray in which the rod 14 for guidance marks is fixed to the ball 15 in this manner, the rod 14 for guidance marks is used instead of the incisal pin 46 of the above-mentioned articulator 4 be able to. For example, the incisal pin 46 of the above-mentioned articulator 4 may be removed, and instead the rod 14 for the guidance mark may be installed, the position adjusted, and the position fixed by the incisor pin screw 49.
Fifth Embodiment

  In the above-mentioned embodiment, the positioning of the impression tray is performed using the incisal pin 46 at the time of manufacture of the gypsum model 25a of the upper jaw and the gypsum model 25b of the lower jaw, but the invention is not limited thereto. For example, when a plaster model of the upper and lower jaws is manufactured in advance using an impression material obtained from the impression tray 1, and the plaster model and the base are bonded with a second plaster to make a working model, The impression tray may be positioned by inserting an articulator incisal pin into the hole of the ball positioned by the guide rod at the time of impression acquisition. Specifically, a working model can be produced as follows.

  First, the sheet is attached to the frame 16 so that the impression materials 23a and 23b with the impressions of the upper and lower jaws surround the substantially bowed frame 16 of the impression tray 1 held on both sides of the screen 20 respectively. At this time, the sheet is disposed so as to protrude from the impression material 23 a and the impression material 23 b in the Z-axis direction. Thereby, the space surrounded by the walls formed by the impression materials 23a and 23b of the upper and lower jaws and the sheet is formed.

  Next, the first gypsum is poured into the space formed by the impression material 23a of the upper jaw and the sheet, and the first gypsum is further poured into the space formed by the impression material 23b of the lower jaw and the sheet. The first plaster is hardened, the sheet is peeled off, and the upper and lower plaster models 25a and 25b are manufactured.

  Next, on the surface opposite to the side in contact with the impression material 23a of the upper jaw of the gypsum model 25a of the upper jaw, holes for dowel pins to be planted are provided corresponding to the portions of the teeth covering the crown and the other teeth. . Thereafter, dowel pins are planted in the holes, and the dowel pins are fixed to the plaster model 25a of the upper jaw. Similarly, dowel pins are planted and fixed to the plaster model 25b of the lower jaw.

  Next, a second plaster is deposited on the surface on which the dowel pin of the upper jaw gypsum model 25a is planted and on the surface on which the dowel pins of the lower jaw model 25b are planted. The incisal pin 46 is inserted into the through hole 151 of the ball 15 of the impression tray 1 on which the second plaster is placed, and the impression tray 1 is placed in the articulator 4. Maintaining this condition, wait until the second plaster hardens.

  After the second plaster is hardened, the impression tray 1, the impression material 23a for the upper jaw and the impression material 23b for the lower jaw are removed, and the working model is completed. The working model produced in this manner is a second plaster in a state in which the incisal pin 46 of the articulator 4 is inserted into the through hole 151 of the ball 15 positioned and fixed by the rod 14 for guidance mark at the time of impression acquisition. The stiffening of the patient is performed and produced, so that the positional relationship between the patient's nasal muscles and the jaws is accurately reproduced.

Also, according to this manufacturing method, the dowel pin pierces the second plaster in the second plaster provided between the maxillary plaster model (the mandibular plaster model) and the maxillary side base 31 (the lower jaw side base 32). Thereby, a hole is provided in which the dowel pin is inserted. Thereby, when the tooth model of the part to be covered with the crown is cut out from the gypsum model, the cut-out gypsum model is provided with the dowel pin, and the hole into which the dowel pin is inserted is provided in the second gypsum . With such a configuration, the dowel pin can be used as a pin for positioning, and the cut-out gypsum model can be repeatedly returned to the original working model or removed.
Sixth Embodiment

  In the first embodiment, the space portion 17 in which the ball 15 is movable on the XY plane is provided as a variable mechanism that allows the position of the ball 15 to be changed relative to the tray main body 12. It is not limited to. For example, by configuring the guidance mark portion on which the ball is installed so as to be separable from the tray main body, the position of the ball 15 can be set to the tray main body by arbitrarily adjusting the relative position of the guidance mark portion to the tray main body. It may be variable relative to 12. Hereinafter, description will be made with reference to FIGS.

  15 to 20 are views showing the impression tray 501 of the present embodiment. FIG. 15 is a schematic plan view of the impression tray 501, showing a state in which the cover-like member of the positioning member is closed and the flange portion of the guidance mark portion is fixed by the positioning member. FIG. 17 is a schematic plan view of a state in which the lid member of the positioning member of the impression tray 501 shown in FIG. 16 is opened. FIG. 17 is a schematic side view of the impression tray 501 shown in FIG. 15, and shows a state in which the lid member of the positioning member is closed to separate the guidance mark from the tray main body. 18 is a cross-sectional view taken along line XV-XV of FIG. 19 and 20 are schematic rear views for explaining the variable mechanism of the impression tray 501, and FIG. 19 shows a state in which the lid of the positioning member is opened, and FIG. 20 shows the lid of the positioning member. Indicates the closed state.

  An impression tray 501 according to the present embodiment is also a triple tray for obtaining three impressions of upper and lower jaws and occlusion similarly to the first embodiment, and is a tray assumed to obtain the entire dental arch. . The impression tray 501 is configured to be capable of holding an impression material for obtaining an impression by inserting it into a patient's oral cavity and biting it.

  The impression tray 501 includes a tray main body 512, a positioning member 521, an instruction mark 511, a rod 14 for an instruction mark, a ball 15, and a fixing screw 513 as a rotation stopper.

  As shown in FIGS. 15 and 16, the tray main body 512 has a frame and a screen as in the first embodiment. The configurations of the frame and the screen are the same as in the first embodiment, and thus the description thereof is omitted. The tray main body 512 and the positioning member 521 are configured to be coupled, and the tray main body 512 and the positioning member 521, and the guidance mark portion 511 are configured to be separable.

  As shown in FIG. 16, the positioning member 521, which is a variable mechanism, is coupled to the vicinity of the central portion of the bow on which the impression of the front teeth of the tray main body 512 is to be taken when taking an impression using the impression tray 501. Ru. The positioning member 521 includes a box-like member 5212 and a lid-like member 5211 connected by a hinge structure. The lid member 5211 is provided with a shaft cylinder 529 having a hole 527. The box-like member 5212 has a U-shaped recess 528 in a plan view into which the shaft cylinder 529 is inserted. In addition, the box-like member 5212 has a plurality of holes 526 provided on the opposite surface forming the recess 528 and on the side wall of the box-like member located parallel to this plane. The plurality of holes 526 and the holes of the shaft cylinder 529 provided in the lid-like member 5211 are arranged in a straight line, and pins are provided so as to penetrate all the holes, thereby forming a hinge structure. In the positioning member 521, the lid 5211 can be opened and closed around a pin.

Furthermore, as shown in FIG. 16, FIG. 19 and FIG. 20, the positioning member 521 has the box-like member 5212 and the lid closed with the lid-like member 5211 closed at the end opposite to the end where the hinge structure is formed. A fixing screw 541 for fixing the second member 5211 is provided. The fixing screw 541 can be inserted into the female screw-like through hole 523 on the inner wall surface provided in the lid member 5211 and the female screw-like hole 524 on the inner wall surface provided in the box-like member 5212. ing.
As shown in FIG. 19, with the lid 5211 open, the fixing screw 513 is inserted and held only in the through hole 532.

  As shown in FIG. 20, when the lid 5211 is closed, the substantially rectangular parallelepiped fixing space 530 formed of the opening 530a of the box 5212 and the opening 530b of the lid 5211 is a positioning member. It is formed in 521. The inner bottom surface of the box-like member 5212 and the inner bottom surface of the lid-like member 5211 are parallel to each other.

  In the positioning member 521 having a rectangular parallelepiped outer diameter when the lid is closed, an opening 534 communicating with the fixing space 530 is formed on the side surface 521 a of the positioning member 521. When closing the lid 5211 to fix the box 5212 and the lid 5211, the fixing screw 541 is inserted into the through hole 532 and the hole 533, the screw is tightened, and the lid of the positioning member 521 is closed. It becomes the shape of a closed rectangular parallelepiped. The opening 534 has an elongated rectangular shape, and the vertical length of the opening 534 in the Z-axis direction is the height of the fixing space 530, that is, the inner bottom surface of the box-like member 5212 and the lid 5211 It is shorter than the distance of the inner bottom.

  As shown in FIG. 17, the guidance mark portion 511 has a shape in which the flange portion 5111 and the ball installation portion 5112 are joined. The guidance mark unit 511 has a holding portion (reference numeral 5114 in FIG. 18) described later that holds the ball 15 and the ball 15 rotatably at one end. The flange 5111 which is the other end of the guidance mark 511 is a portion which is disposed in the fixing space 530 of the positioning member 521 and is fixed at an arbitrary position.

  The flange portion 5111 has a rectangular parallelepiped shape protruding from the ball setting portion 5112. The height of the flange portion 5111 in the Z-axis direction is the same as the height of the fixing space 530. The longitudinal length of the flange portion 5111 in the X-axis direction and the lateral length in the Y-axis direction are respectively smaller than the longitudinal length and the lateral length of the fixing space 530. Thus, when the flange portion 5111 is disposed in the open space 530 a of the box-like member 5212, the disposition position of the flange portion 5111 can be arbitrarily changed. Then, by changing the position of the flange 5111, the positional relationship between the center line of the guidance mark 511 along the longitudinal direction of the guidance mark 511 and the center line of the tray main body 512 along the X-axis direction is arbitrarily determined. It can be adjusted.

  As shown in FIG. 19, the flange portion 5111 is disposed in the open space 530 a of the box-like member 5212 in a state where the lid-like member 5211 of the positioning member 521 is opened at the time of positioning the instruction mark 511. While positioning of the guidance mark part 511 is performed, the lid-like member 5112 is in the open state. Then, after positioning the guidance mark 511, as shown in FIG. 20, the lid 5211 is closed, and the box 521 and the lid 5211 are fixed by the fixing screw 541, so that the flange 5111 is formed. Is fixed so that the position does not move in the fixing space 530.

The ball placement portion 5112 is a grip portion that the user has when working, and has a shape that is long in the X direction. The instruction mark unit 511 includes a ball 15, a holding unit 5114, and a fixing screw 513 at one end, and the other end is coupled to the flange 5111.
The instruction mark unit 511 has a ball 15 of a sphere and a holding unit 5114.
The ball 15 has a through hole 151 into which a bar 14 for a guidance mark is inserted. The rod 14 for the guidance mark is configured to be insertable and removable from the through hole 151.

  As shown in FIG. 18, the holding portion 5114 is a substantially spherical space slightly larger than the ball 15 and formed inside the guidance mark portion 511. The holding portion 5114 is spatially connected to the openings 5116 and 5113 respectively provided on the upper and lower surfaces of the guidance mark 511, and the thickness of the guidance mark 511 is determined by the holding portion 5114 and the openings 5116 and 5113. A through hole is formed in the direction (Z-axis direction). The openings 5116 and 5113 have a substantially circular planar shape, and their diameter is set smaller than the diameter of the ball 15. As a result, the ball 15 is not detached from the instruction mark portion 511.

  The ball 15 is held by the holder 5114 and configured to be rotatable in the holder 5114. Further, from the opening 5116, a bar 14 for a guidance mark inserted into the ball 15 is configured to project. By inserting the rod 14 for guidance mark into the through hole 151 of the ball 15 and rotating the ball 15 about the center of the ball 15, the inclination of the rod 14 for guidance mark can be adjusted.

  The fixing screw 513 is installed on the side surface of the instruction mark 511. The fixing screw 513 is configured to be insertable into a hole 5115 having a female screw-like inner wall surface formed in the X-axis direction in the drawing from the side surface of the guidance mark portion 511 toward the holding portion 5114. The holes 5115 and the holding portion 5114 are connected in space. The fixing screw 513 stops rotation of the ball 15 by turning and tightening the fixing screw 513 so that the ball 15 is pushed toward the inner wall surface of the holding unit 5114, and the position of the ball 15 is held in the holding unit 5114. Fix it with Further, by loosening the fixing screw 513, the ball 15 can be rotated within the holding portion 5114.

  When the impression tray 1 holding the impression material is bitten in the patient's oral cavity to obtain the upper and lower impressions in the oral cavity (shape of upper and lower jaw teeth) and meshing, the flange of the guidance mark 511 The portion 5111 is disposed in the opening space 530a of the box-like member 5212 with the lid 5211 open, so that the patient's nasal muscles and the bar 14 for the guidance mark coincide while looking at the front of the patient, The flange portion 5111 is moved on the inner bottom surface of the box-like member 5212, and the inclination of the bar 14 for guidance mark is adjusted. Then, the lid 5211 is closed at a position where the nasal muscles of the patient and the rod 14 of the guidance mark coincide, and the lid 5211 and the box 5212 are fixed by the fixing screw 541 to fix the flange 5111 in the fixing space. It is fixed so as not to move in 530, and further, the ball 15 is fixed so as not to rotate by the fixing screw 513.

As described above, in the impression tray 501 of the present embodiment, the guidance mark 511 and the tray main body 512 can be separated, and the guidance mark 511 is fixed at an arbitrary position by the positioning member 521 coupled to the tray main body 512. Since the configuration is possible, the position of the ball 15 can be made relatively variable with respect to the tray main body 12. Further, the ball 15 has a rotatable structure, and a fixing screw 513 for fixing the position of the ball 15 to stop the rotation of the ball 15 is provided, thereby providing a guide mark inserted into the through hole 151 of the ball 15. It is possible to fix the inclination of the rod 14 at an arbitrary position.
Seventh Embodiment

  In addition to the configuration of the impression tray according to the first embodiment, an auxiliary pin for alignment at the time of impression acquisition may be provided on the bar 14 for guidance mark. This will be described below with reference to FIG. In addition, about the same structure as the above-mentioned tray 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 21, the impression tray 601 has an auxiliary pin 602 which penetrates the bar 14 for guidance and is arranged and fixed perpendicularly to the bar 14 for guidance. The auxiliary pin 602 is provided so as to be located near the lower part of the patient's nose when the patient bites the impression tray 601 at the time of impression acquisition. The tip of the auxiliary pin 602 can be aligned near the center of the nasal bridge, and the inclination of the guiding rod 14 can be adjusted to match the nasal muscle so that the tip of the auxiliary pin 602 does not move. As described above, since the auxiliary pin 602 is disposed at a position close to the center of rotation of the bar 14 for guidance, it is easy to adjust the inclination of the bar 14 for guidance so as to match the nasal muscles. This makes it possible to produce a working model that can more closely reproduce the patient's oral cavity.
Eighth Embodiment

In addition to the structure of the tray for impressions concerning a 1st embodiment, you may provide in a pair of ear stop parts for left-right position alignment at the time of impression acquisition. Hereinafter, description will be made with reference to FIG. In addition, about the same structure as the above-mentioned tray 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
As shown in FIG. 22, the impression tray 801 is provided with ear locking portions 802, 802 on both sides of the ball setting portion 112.

  The ear catches 802, 802 are typically rod-like members, one end of which is rotatably supported by the ball placement part 112, and the other end of which is inserted into the patient's ear. And a positioning member 804 is provided at a position corresponding to the pivoting position of the jaw. The pair of ear catches 802, 802 may be configured to be rotatable independently of each other with respect to the ball placement unit 112, or may be configured to be mutually coupled and capable of rotating together. Alternatively, it may be fixed to the ball setting unit 112. The positioning members 804 project in the same direction as the locking member 803 and are provided to face each other.

At the time of taking an impression, the impression tray 801 is engaged with the patient's ear via the pair of ear anchors 802. Thus, the left and right alignment of the impression tray 801 is performed at the time of impression acquisition.
A pair of locking members (not shown) for rotatably locking the positioning member 804 are provided at positions coincident with the axis 45 of the upper frame 42 of the articulator 4 shown in FIGS. 9 and 10.
As a result, when producing upper and lower plaster models, the impression tray 801 can be accurately positioned to the left and right, and then meshing can be performed with movement similar to the movement of the patient's jaw.

DESCRIPTION OF SYMBOLS 1, 201, 501, 601 Tray for impression 11, 211, 511 Instruction mark part 12, 212, 512 Tray main body 13, 513 Screw for fixation (rotation stop part)
14 guide rod 15 ball 16 frame 17 space 20 screen 23a upper jaw impression material 23b lower jaw impression material 25 working model 46 incisal pin (positioning rod)
131, 5114 holder 151 through hole (hole of ball)
521 Positioning member A Nasal muscle

Claims (15)

An impression tray for holding an impression material for obtaining upper and lower impressions and bites by inserting into the oral cavity of a patient and biting,
It has a tray main body which has a frame which detachably holds the outer periphery of the screen on which the above-mentioned impression material is placed on both upper and lower sides,
The frame has a pair of upper and lower frames which hold the screen by holding them from both upper and lower sides of the screen,
The upper frame and the lower frame are detachably engaged with each other. An impression tray. An impression tray according to claim 1, wherein
The impression tray provided with the first through groove which penetrates from the inner wall side to the outer wall side of the frame at the pinching end where the upper frame or the lower frame abuts against the screen to pinch the screen. An impression tray according to claim 1 or 2, wherein
The upper frame and the lower frame have the first through grooves so as to face each other. An impression tray according to any one of the preceding claims, wherein
An impression tray, wherein the upper frame or the lower frame has, at an end opposite to the sandwiching end, a second penetration groove penetrating from the inner wall side to the outer wall side of the frame. It is a tray for a seal | sticker of Claim 4, Comprising:
The second through groove has a protrusion protruding from the groove wall into the groove at a position near the opposite end. Impression tray. It is a tray for seals of any one of Claim 2 to 5, Comprising:
The first through groove or the second through groove is large from the inner wall side to the outer wall side of the frame. An impression tray according to any one of the preceding claims, wherein
The upper frame or the lower frame has a through hole penetrating from the inner wall side to the outer wall side of the frame. It is a tray for impressions of Claim 7, Comprising:
The hole diameter of the through hole is large from the inner wall side to the outer wall side of the frame. An impression tray according to any one of the preceding claims, wherein
The upper frame or the lower frame is detachably divided mutually into two or more, and the divided divided frames are detachably engaged with each other. Impression tray. An impression tray according to any one of the preceding claims, wherein
A guidance mark portion connected to the tray main body and provided with a hole provided with a hole into which a rod for a guidance mark is inserted, and a holding portion for holding the ball rotatably;
An impression tray comprising: a variable mechanism capable of changing the position of the ball relative to the tray main body. An impression tray according to claim 10, wherein
The variable mechanism includes a space portion provided on the guidance mark portion and movable in a state where the ball is held by the holding portion. An impression tray according to claim 11, wherein
The guidance mark unit is detachable from the tray main body. An impression tray according to claim 10, wherein
The guidance mark unit is provided at one end with the ball and the holding unit.
The variable mechanism is a positioning member that is coupled to the tray main body and that can fix the other end of the guidance mark at an arbitrary position. An impression tray according to any one of claims 10 to 13, wherein
The impression tray further includes a rotation stopping unit that stops rotation of the ball held by the holding unit. An impression tray according to any one of the preceding claims, wherein
A guidance mark portion connected to the tray body, and a rod for a guidance mark rotatably attached thereto;
An impression tray comprising: a variable mechanism capable of changing the position of the ball relative to the tray main body.

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