JP2018201881A - Impression tray and production method of working model - Google Patents

Abstract

To provide an impression tray that enables producing a working model based on an impression material with good accuracy and reproducibility without needing time and labor, and provide a production method of the working model.SOLUTION: An impression tray 1 is inserted in a patient's oral cavity and is bitten, and thereby holds an impression material for acquiring upper and lower impressions and engagement. The impression tray 1 comprises: a screen 20 formed of a thin film and having a bitten part; a tray body 12 having a frame 16 for supporting at least a portion of an outer circumference of the screen 20; a ball 15 connected to the tray body 12, and provided with a hole with a guidance mark stick 14 inserted therein; a guidance mark part 11 having a holding part for rotatably holding the ball 15; and a variable mechanism capable of relatively varying the position of the ball 15 to the tray body 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an impression tray used when taking an impression of a patient's dentition and gingiva in the production of a dental prosthesis, and in particular for an impression known as a “triple tray” that simultaneously obtains upper and lower impressions and meshing. The present invention relates to a method for manufacturing a tray and a work model.

  In the field of dental technology, a technique for taking a tooth pattern called an impression is known. As a method of taking an impression, an instrument that is curved along the shape of the oral cavity, called an impression tray, and an impression material such as alginate or silicone are inserted into the patient's oral cavity, and then it is inserted into the patient's mouth. There is a way to bite.

  Among these, impression trays called triple trays (for example, Patent Documents 1 to 5) typically include a frame that forms the tray, and a non-woven screen or the like that is stretched over the frame and holds the impression material on the tray. And have. In the method using the triple tray, impression material is placed on both the upper and lower jaws of the tray, inserted into the patient's mouth, and the patient bites, so that the upper and lower impressions and meshing are taken simultaneously. Can be obtained.

Special table 2008-508080 gazette Japanese Patent Laying-Open No. 2015-66258 Japanese National Patent Publication No. 11-505750 JP 2007-209575 A JP 2012-217622 A

This inventor is examining the technique which manufactures a working model with an articulator using a triple tray.
For example, a triple tray holding impression materials on both sides is set in an articulator, gypsum is poured into the upper jaw side space of the impression, the triple tray is inverted, and gypsum is poured into the lower jaw side space. The work model is manufactured as described above, but the patient's teeth arrangement and the shape of the teeth themselves are different, and it seems that they are bent or slanted when viewed from the whole face, Sometimes it is not very good in terms of aesthetics. Therefore, as is generally done in the past, it is conceivable to take a photo of the face including the patient's teeth in advance and adjust the work model while looking at this photo when making the work model. .

  However, in this case, a facility for taking a photograph and a trouble of taking a photograph are required, and there is much room for subjectivity of an operator who produces a work model, which is not preferable in terms of accuracy and reproducibility.

  In view of the circumstances as described above, an object of the present invention is to provide an impression tray and a method for producing a work model that can produce a work model based on an impression material with high accuracy and reproducibility without requiring labor. There is to do.

In order to achieve the above object, an impression tray according to an embodiment of the present invention includes a tray body, a guidance mark portion, and a variable mechanism.
The impression tray holds an impression material that obtains an upper and lower impression and engagement by being inserted into a patient's mouth and chewed.
The tray body is formed of a thin film and includes a screen having an occluded portion and a frame that supports at least a part of the outer periphery of the screen.
The instruction mark unit includes a ball connected to the tray body and provided with a hole into which a guide mark bar 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 body.

  According to such a configuration of the present invention, since the ball is provided so as to be movable, and further, the guidance mark rod inserted into the hole provided in the ball is provided rotatably, the impression tray When using the upper and lower jaw impressions and engagement in the oral cavity, move and rotate the ball so that the guidance mark stick matches the patient's nose muscles, and adjust the position and inclination of the guidance sign stick The positional relationship between the patient's upper and lower jaws and nasal muscles can be acquired. Thereby, for example, when producing a work model using an impression tray, it is possible to obtain a work model that reproduces the positional relationship between the upper and lower jaws and the nasal muscles in addition to the obtained impression and engagement of the upper and lower jaws. .

The variable mechanism may have a space portion provided in the instruction mark portion and movable in a state where the ball is held by the holding portion.
Thus, by providing a space portion in the instruction mark portion, the position of the ball may be made relatively variable with respect to the tray body.

The instruction mark may be detachable from the tray body.
Thereby, when conveying the impression tray, it is possible to remove the instruction mark portion from the tray body and to transport the impression tray in a reduced size.

  The instruction mark is provided with the ball and the holding part at one end, and the variable mechanism is a positioning member that is coupled to the tray body and can fix the other end of the instruction mark at an arbitrary position. Also good.

The instruction mark part may further include a rotation stopping part that stops the rotation of the ball held by the holding part.
Thereby, the inclination of the guidance mark stick can be fixed at an arbitrary position.

The frame may support the screen detachably.
Thereby, the screen can be replaced and the frame can be reused.

  According to an embodiment of the present invention, there is provided a method for producing a work model, wherein an impression material is placed vertically on the screen of the impression tray described above, and the tray body is inserted into a patient's oral cavity to be placed on the screen. The upper and lower impression materials and the meshing are obtained by biting the upper and lower impression materials, and the upper and lower impression materials stacked on the screen are bitten, and the instruction mark inserted into the hole of the ball is used. The position of the ball was moved so that the stick coincided with the patient's nose muscles, and the ball was rotated. Then, the teaching mark stick was removed from the hole of the ball, and a positioning stick was previously installed. In the articulator, the impression tray in which plaster is poured into the impression space of the impression tray is installed by inserting the positioning rod into the hole of the ball.

  According to such a configuration of the present invention, since the impression and engagement of the upper and lower jaws in the oral cavity are obtained using the guidance mark stick, the positional relationship between the patient's upper and lower jaws and the nasal muscles can be acquired. In addition to the impression and engagement of the upper and lower jaws, 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 impression tray holds an impression material that obtains an upper and lower impression and engagement by being inserted into a patient's mouth and chewed.
The tray body is formed of a thin film and includes a screen having an occluded portion and a frame that supports at least a part of the outer periphery of the screen.
The instruction mark portion is connected to the tray body, and a guide mark bar is pivotally attached to the instruction mark portion.
The variable mechanism can change the position of the ball relative to the tray body.

  Thus, it is good also as a structure pivotally attached to the guidance mark part so that the stick for guidance marks can rotate.

  According to the present invention, it is possible to accurately reproduce the upper and lower impressions and meshing with efficient work. And the labor of manufacture in a dental prosthesis can be reduced with the manufacturing method of the dental prosthesis using the said tray for impressions.

It is a perspective view of the tray for impressions concerning the 1st embodiment of the present invention. FIG. 2 is a schematic plan view, bottom view, and side view of the impression tray shown in FIG. 1. It is a typical rear view of the impression tray shown in FIG. It is sectional drawing cut | disconnected by line IV-IV of FIG. 2 (A). It is a typical side view of an articulator. It is a typical front view of the articulator shown in FIG. It is a figure which shows a mode that a patient adds the impression tray shown in FIG. 1 to a mouth, and takes the impression in an oral cavity in order to manufacture the model of an upper and lower jaw. It is a figure which shows the manufacturing method of the upper and lower jaw model using the impression tray shown in FIG. 1, and shows a mode that the upper and lower jaw model is manufactured using the articulator shown in FIG. FIG. 6 is a side view of a working model in which the upper and lower jaw models manufactured using the impression tray shown in FIG. 1 are installed in the articulator shown in FIG. 5. It is a typical top view of the tray for impressions concerning a 2nd embodiment. It is a typical top view of the tray for impressions concerning a 6th embodiment. FIG. 12 is a schematic plan view showing a state where a lid-like member of the positioning member of the impression tray shown in FIG. 11 is opened. FIG. 12 is a schematic side view showing a state in which the lid-like member of the positioning member of the tray main body of the impression tray shown in FIG. 11 is closed and the tray main body and the instruction mark are separated from each other. FIG. 12 is a partial cross-sectional view of the impression tray cut along line XV-XV in FIG. 11. It is a partial rear view of the impression tray which shows the state which opened the lid-shaped member of the positioning member of the impression tray shown in FIG. It is a partial rear view of the impression tray which shows the state which closed the lid-shaped member of the positioning member of the impression tray shown in FIG. It is a figure which shows a mode that a patient adds the impression tray which concerns on 7th Embodiment to a mouth, and takes the impression in an oral cavity, in order to manufacture the model of an upper and lower jaw.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
[Composition of impression tray]
1 to 5 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, a side view, and FIG. 3 is a rear view of the impression tray 1. 4 is a cross-sectional view taken along line IV-IV in FIG.

  The impression tray 1 according to the present embodiment is a triple tray that obtains three impressions of upper and lower jaws and occlusion, and is a tray that is assumed to obtain the entire dental arch. The impression tray 1 is configured so as to hold an impression material that takes an impression by being inserted into the patient's oral cavity and chewed.

  In the present embodiment, a silicone impression material such as vinyl polysiloxane (VPS) or superhydrophilic VPS is used as the impression material. However, the present invention is not limited to this, and an alginate impression material and other impression materials can be used.

  The impression tray 1 includes a tray body 12, a guidance mark portion 11, a guidance mark rod 14, a ball 15, and a fixing screw 13 as a rotation stop portion.

The tray body 12 includes 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 lingual side when inserted into the patient's oral cavity. The frame 16 supports at least a part of the outer periphery of the screen 20. The frame 16 detachably supports the screen 20. As a result, 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. At least one of the outer frame 16a and the inner frame 16b preferably has good adhesiveness to the impression material. This makes it easy to hold the impression material on the impression tray 1 by the adhesive force 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. Because. At least one of the wall surface 116a facing the inner frame 16b of the outer frame 16a and the wall surface 116b facing the outer frame 16a of the inner frame 16b is displaced or peeled off from the impression tray 1. Concavities and convexities for preventing this may be formed.

  The screen 20 is provided so as 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 the present 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. The screen 20 is preferably stretched in a moderately slacked state so as not to generate a large repulsive force when it is bitten for taking an impression.

  The screen 20 has an occluded part. The occlusal portion is an area of the screen 20 that is set to include a portion where the upper and lower teeth of the patient mesh with each other when the impression is taken (at the time of occlusion). That is, the occlusal part is an area that occupies the center of the screen 20, and is an area that is defined for convenience so that the position of the teeth at the time of impression acquisition falls within the range of the occluded part. The range of the occluded portion is not particularly limited, and may be set as appropriate according to the shape of the impression tray 1 and the like.

  The occlusal part is non-porous, and the thickness of the occlusal part is 20 μm or less. For example, in an existing triple tray, there is a mesh-type screen or a screen made of Japanese paper, but such a screen has a structure with a hole. On the other hand, the above-mentioned occluded part is constituted by a single film having no holes.

  As the resin film that is the 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 a sufficient strength even when the thickness is 20 μm or less, and is therefore suitable for forming a non-porous occlusal portion having a thickness of 20 μm or less. In addition, there is a merit that it is difficult to generate a reaction force that hinders occlusion at the time of occlusion for taking an impression, and it is difficult to break. 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. As a result, the meshing and the like can be reproduced more accurately.

  Of the screen 20, at least the occluded portion includes a pigment having light reflectivity. As this pigment | dye, what has sufficient safety | security for using for medical supplies is used. The pigment may be contained in the polyurethane resin material, or may be attached to the surface of the resin film by spraying or coating. Typically pigmentation can be done by powdering of titanium oxide

  In this embodiment, the screen 20 has a peripheral part set around the part to be occluded as an area other than the part to be occluded. The peripheral portion is a region that is unlikely to be a position where the patient's teeth mesh when taking an impression. For example, a region near the frame 16 away from the center of the screen 20 can be set as the peripheral portion. In the peripheral part, there is an action of receiving an impression material pushed out around the teeth at the time of taking an impression.

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

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

  As a method of adhering the impression material to the screen 20 with an adhesive, an operator thinly applies the adhesive to the bonding areas on both sides of the screen 20 with a brush or a cotton ball immediately before using the impression tray 10. After drying well, impression material should be placed afterwards. However, it is not limited to this, For example, the adhesive agent may be previously apply | coated to the area | region for adhesion | attachment.

  The adhesive area should have a rough adhesive application range, for example, with outlines and marks on the outside. For the work such as adhesive application and impression material placement by the operator, 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, and the boundary between the bonding area and the other area may not be apparently discriminated.

  The bonding area is provided for the following reason. When the screen 20 is formed of a polyurethane resin film, the silicone impression material is difficult to adhere to the polyurethane resin film, so that the impression material is easily peeled off from the screen 20 and it may be difficult to hold the impression material. Therefore, in this embodiment, in order to easily hold the impression material on the screen 20, the impression material is bonded to the screen 20 with an adhesive. According to this configuration, it is possible to easily hold the impression material by adhering it to the screen 20 around the occluded portion by applying the adhesive to the bonding region in the peripheral portion.

  Here, it is preferable that the bonding region is not provided in the occluded portion but only in the peripheral portion. If an adhesive is applied to the screen 20 when the impression tray 1 is used, the thickness increases by the thickness of the adhesive. According to this configuration, since the thickness of the adhesive increases only in the peripheral portion having the bonding region, the impression tray 1 can be used with the thickness of the occluded portion being 20 μm or less. . As a result, the peripheral portion can hold the impression material by strengthening the adhesion with the impression material by the adhesive, while the occluded portion is sufficiently thin with respect to the deformation of the impression material because the thickness is sufficiently thin. Since no reaction force is generated, it is possible to prevent the impression material from being peeled off from the screen 20 as a whole.

  In addition, you may provide the hole (illustration 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, one hole may be provided. The impression material piled up on the front surface side of the screen 20 and the impression material piled up on the back surface side of the screen 20 are directly contacted and bonded through the hole, and the impression material is screened around the occluded portion in the same manner as described above. 20 can be easily held. Moreover, the adhesion | attachment area | region may contain the adhesive agent component which can adhere | attach an impression material previously. 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 that avoids the occluded portion. Or the component similar to said adhesive agent may be beforehand apply | coated to the area | region for adhesion | attachment of the both surfaces of the screen 20. FIG. Further, the bonding area may not be provided on the screen 20. When the bonding area is not provided on the screen, the impression material may be held on the impression tray by bonding the impression material to the frame, for example. Alternatively, an impression tray may be used by applying an adhesive to a part of the occluded portion 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 guidance mark part 11 includes a connecting part 111 and a ball setting part 112. The instruction mark 11 is connected to the tray body 12 and fixed. The guidance mark 11 is disposed so as to protrude from the tray body 12. The instruction mark 11 is obtained by a doctor or a dental technician at the time of obtaining the impression and engagement of the upper and lower jaws in the oral cavity using the impression tray 1, at the time of making the upper and lower jaw models, at the time of adjusting the occlusion, etc. It becomes a gripping part to be gripped.

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

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

  The ball 15 has a through-hole 151 into which the guidance mark rod 14 is inserted. The guide mark rod 14 is configured to be inserted into and removed from the through hole 151. By rotating the ball 15 around the center of the ball 15 in a state where the guidance mark rod 14 is inserted into the through hole 151 of the ball 15, the inclination of the guidance mark rod 14 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 a bow shape, and a 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 maintaining a state in which the ball 15 is rotatably held by a holding portion 131 of the fixing screw 13 described later. The space 17 includes a first opening space 171 that opens to the upper surface 112 a of the ball installation unit 112, a second opening space 172 that opens to the curved side surface 112 b of the ball installation unit 112, and the lower surface of the ball installation unit 112. The third opening space 173 opening to 112c is spatially connected.

The first opening space 171 has a shape obtained by bending an elongated substantially rectangular parallelepiped into an arcuate shape, and the cross-sectional shape orthogonal to the XY plane along the longitudinal direction is substantially rectangular. The cross-sectional shape of the first opening space 171 cut along a plane parallel to the XY plane is an arcuate shape, and the width thereof is smaller than the diameter of the ball 15, whereby the ball 15 is moved from the space portion 17 to the impression tray. No detachment outside of 1.
The guide mark bar 14 is configured to protrude from an elongated opening 181 formed in the upper surface 112a by the first opening space 171. By moving the ball 15 with the guidance mark rod 14 inserted into the through-hole 151 in the space portion 17, the inside of the first opening space 171 is guided along the arcuate space portion 17 in a bow shape. The marking bar 14 moves.

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

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

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

  The holding part 131 has a shade shape that covers a part of the surface of the ball 15. The holding unit 131 holds the ball 15 so that the ball 15 can rotate and move in the space 17 without the ball 15 being detached from the holding unit 131. In the fixing screw 13, the holding portion 131 is located in the space portion 17, the screw portion 132 is located so as to penetrate the second space portion 172 and a plate-like member 19 which will be described later, and the knob 133 is opened. Projecting from the outside.

The ball 15 is not detached from the holding portion 131 and is held rotatably by the holding portion 131 and the space portion 17. In conjunction with the movement of the knob 133, the holding portion 131 connected 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 that is movable in the state where the ball 15 is held by the holding portion 113 in the instruction mark portion 11, and the position of the ball 15 is relative to the tray body 12. It is provided with a variable mechanism that makes it variable.

  The plate-like member 19 has a rectangular planar shape and has a through hole at the center. An internal thread portion is provided on the inner wall surface of the through hole. The threaded 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 112b one above the other with the opening 182 interposed therebetween. The pair of guide rails 50 and 51 respectively support a pair of opposing side surfaces of the plate member 19 so that the plate member 19 can move along the side surface 112b.

  As shown in FIGS. 3 and 4, when positioning the ball 15, the user moves the knob 133 in the XY plane so that the ball 15 is rotatably held by the holding portion 131. Move on the XY plane. Then, by changing the inclination of the guidance mark bar 14 by the user, the ball 15 rotates and the position of the through hole 151 changes.

  When the impression tray 1 holding the impression material is chewed in the patient's oral cavity, the upper and lower impressions (the shape of the upper and lower jaw teeth) and the engagement are obtained, and the patient's nasal muscles and instruction marks are obtained. The ball 15 is moved in the XY plane so as to be aligned with the rod 14 for the patient, and the ball 15 is positioned by adjusting the inclination of the rod 14 for the marker, and the nose of the patient and the rod for the marker The ball 15 is fixed at a position where 14 coincides.

  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 portion 17 so that the ball 15 contacts the inner wall of the space portion 17. The fixing screw 13 is tightened in a state where the shape member 19 is in contact with the side surface 112 b of the ball installation portion 112, and the ball 15 is fixed. Thereby, the ball 15 is fixed in the positioned state.

  As described above, in the present embodiment, by providing the space portion 17, the position of the ball 15 can be moved within the space portion 17, and the ball 15 is held rotatably so that the through-hole 151 of the ball 15 is provided. It is possible to adjust the inclination of the guidance mark bar 14 inserted into the guide mark. As a result, when the impression tray 1 is used to obtain the impression and engagement of the upper and lower jaws in the oral cavity, the position of the ball 15 is moved and the ball is rotated, so that the stick for the guidance mark and the nose muscle coincide. In this way, the position of the guidance mark stick can be adjusted.

  Then, a gypsum model is manufactured based on the impression material obtained using the impression tray to which the positioned ball 15 is fixed. Thereby, for example, even if the state of the patient's oral cavity is deviated from the center of the dentition relative to the nasal muscles or the boundary between the upper jaw and the lower jaw is not substantially perpendicular to the nasal muscles, It is possible to produce a plaster model that accurately reproduces the positional relationship between the center and nose muscles and the inclination of the jaw.

  The tray main body 12 and the instruction mark portion 11 are made of the same material, and are made of, for example, plastic, aluminum, stainless steel or the like. The material used for the screen 20 is not limited to urethane, and for example, Japanese paper or the like may be used.

[Configuration of articulator]
The construction of the articulator used for the production of the upper and lower jaw plaster model, the production of the dental prosthesis and the occlusal adjustment will be described with reference to FIGS. 5 and 6 are a schematic side view and a front view of the articulator 4, respectively.

  The articulator 4 reproduces jaw movement. The articulator 4 includes a lower frame 41, an upper frame 42, a support column 47, a lower jaw support portion 43, an upper jaw support portion 44, an incisal pin 46 that is a positioning rod, and an upper jaw support portion screw 48. And a screw 49 for an incisal pin.

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

  The insisal pin 46 is provided so that the longitudinal direction thereof is orthogonal to the horizontal plane when the upper frame 42 and the upper jaw support portion 44 are arranged so that the planes thereof are parallel to the horizontal plane (XY plane). The incisal pin 46 is inserted into the through hole 151 of the positioned ball 15 of the impression tray 1 when the upper and lower gypsum models are manufactured using the impression tray 1 described above. The insisal pin 46 is a positioning rod that determines the position of the impression tray 1 with respect to the articulator 4. The insisal pin 46 can be moved along the longitudinal direction by an incisal pin screw 49, and the length protruding from the upper frame 42 can be adjusted.

[Method of manufacturing dental prosthesis using impression tray]
A method for producing a dental prosthesis using the impression tray 1 will be described. In the present embodiment, a case where, for example, a silver crown is manufactured as a dental prosthesis will be described as an example. Hereinafter, in order, the impression material in which the upper and lower impressions in the oral cavity using the impression tray (the shape of the upper and lower jaw teeth) and the meshing method, the upper and lower impressions in the oral cavity and the meshing are obtained. The manufacturing method of the used upper and lower jaw plaster model and the manufacturing method of the dental prosthesis using the plaster model will be described.

(How to take impressions in the oral cavity)
FIG. 7 is a view showing a state in which a patient adds an impression tray to his / her mouth and takes an impression and engagement of upper and lower jaws in the oral cavity. FIG. 7A is a front view of the patient, and FIG. 7B is a side view of the patient.
First, the tray body 12 of the impression tray 1 in which the upper and lower impression materials are stacked on both sides of the screen 20 is inserted into the oral cavity of the patient 2 and bitten by the patient 2.

  The doctor or dental hygienist holding the impression tray 1 looks at the face of the patient 2 from the front, and with the impression material stick 14 inserted in the patient 2 as shown in FIG. The knob 133 is moved to the left and right so as to coincide with the nose muscle A, and the position of the ball 15 having the through hole 151 into which the instruction mark stick 14 is inserted is moved. Then, the ball 15 is rotated with the center of the ball 15 as a starting point to adjust the inclination of the instruction mark bar 14.

The doctor or dental hygienist pushes the fixing screw 13 toward the space portion 17 so that the ball 15 is in contact with the inner wall of the space portion 17 at the position where the nasal muscle A and the guide mark rod 14 coincide with each other. The fixing screw 13 is tightened in a state where the shape member 19 is in contact with the side surface 112 b of the ball installation portion 112, and the ball 15 is fixed. Thereby, the ball 15 is fixed in the positioned state.
And it waits until an impression material hardens | cures, maintaining the state which the nose muscle A and the stick | rod 14 for instruction | indication marks corresponded. After the impression material has hardened, the guide mark rod 14 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 engagement of the upper and lower jaws are obtained.

(Manufacturing method of upper and lower jaw plaster model)
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 taking method.
In general, impression materials for which an oral impression has been taken by a doctor or dental hygienist are transported to a dental laboratory, where a dental technician makes a plaster model and a dental prosthesis using this plaster model. Done. The dental prosthesis produced by the dental technician is transported to the doctor.
The impression tray 1 is transported to the dental laboratory with the instruction mark bar 14 removed from the ball 15. As described above, since the instruction mark stick 14 is transported in a state of being pulled out, it is possible to reduce the size of the delivery item. In addition, the impression tray 1 may be transported in a state in which the instruction mark bar 14 is inserted, but in this case, the instruction mark bar 14 hits something during conveyance and the ball has been fixed. What is necessary is just to pack so that the position of 15 may not shift | deviate.

Hereinafter, a method for producing a plaster model will be described with reference to FIGS.
FIG. 8 shows a state where a gypsum model for the upper and lower jaws is manufactured using the articulator 4, and FIG. 9 shows a state where the manufactured gypsum model for the upper and lower jaws is installed in the articulator 4.

  First, a sheet is affixed to the frame 16 so that the impression materials 23a and 23b having impressions of the upper jaw and the lower jaw surround the substantially arcuate 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 23a and the impression material 23b in the Z-axis direction. Thereby, a space surrounded by the walls formed by the upper and lower jaw impression materials 23a and 23b and the sheet is formed.

  Next, gypsum 25a is poured into the space formed by the upper impression material 23a and the sheet, and the gypsum 25b is also poured into the space formed by the lower jaw impression material 23b and the sheet. Next, as shown in FIG. 8, before the plaster 25 a and 25 b are completely cured, the incisal pin 46 is inserted into the through hole 151 of the ball 15 and is detachably provided on the upper jaw support portion 44 of the articulator 4. The rubber upper jaw base 31 made of rubber and the plaster 25a are in contact with each other, and the rubber lower jaw base 32 detachably provided on the lower jaw support portion 43 of the articulator 4 and the plaster 25b are in contact with each other. Place the tray 1 on the articulator 4. This state is maintained and it waits until gypsum 25a and 25b harden | cure.

  After the upper and lower jaw plaster models 25a and 25b are manufactured, as shown in FIG. 9, the impression tray 1, the upper jaw impression material 23a and the lower jaw impression material 23b are removed, and the lower jaw base 32, the lower jaw plaster model 25b, and the upper jaw The work model 25 consisting of the gypsum model 25a and the upper jaw side base 31 is completed. Since this work model 25 is manufactured by inserting the incisal pin 46 into the through-hole 151 of the ball 15 positioned in the impression tray 1 and hardening the plaster, the positional relationship between the patient's nose and upper and lower jaws Is accurately reproduced.

  As described above, since the triple tray impression tray is used in the present embodiment, it is possible to obtain a combination of upper and lower impressions in the oral cavity. The upper and lower jaw plaster models are manufactured with the impression material obtained from the upper and lower impressions and meshing being held on the impression tray, so that the work model with the upper and lower impressions and meshing accurately reproduced. Can be obtained.

  Furthermore, a stick for guidance marks is provided on the impression tray to acquire the positional relationship between the patient's nose muscles and upper and lower jaws, and this positional relationship is reproduced using the incisal pin of the articulator, so that a work model is produced. The positional relationship between the nasal muscles and the upper and lower jaws can be accurately reproduced, and a work model can be obtained in which the facial features of the patient are more accurately reproduced. For example, even if the center of the dentition is shifted with respect to the nasal muscles or the boundary between the upper jaw and the lower jaw is tilted rather than substantially perpendicular to the nasal muscles, the shift and inclination of the center of the dentition can be reproduced. A plaster model that reproduces the positional relationship between the nose and the center of the dentition and the inclination of the jaw can be produced.

(Production method of dental prosthesis using work model)
A method for producing a silver crown (dental prosthesis) using the work model 25 installed in the articulator 4 will be described.

  First, a tooth portion to be covered with a crown is cut out from the manufactured work model 25. A dowel pin is planted on the surface of the partial plaster model of the target tooth to be covered with the cut crown. Further, a hole into which the dowel pin is inserted is formed in the base.

  Next, wax is applied to the tooth portion of the partial gypsum model of the tooth to be crowned, and the wax-coated partial gypsum model is returned to the work model 25 installed in the articulator 4. Then, the upper jaw plaster model 25a is moved by the articulator 4 to reproduce the movement of the jaw, while confirming the meshing of the teeth to be covered with the other teeth and the harmony with the surroundings, the state of the gums, etc. Carefully form a wax pattern in the shape of teeth while scraping or replenishing the wax.

  Next, the wax pattern is embedded in an investment material serving as a mold, and this is heated at a high temperature. As a result, the wax melts, and a mold is formed in which the portion where the wax pattern exists becomes a cavity. After that, a metal melted in the cavity, here silver, is poured, cooled, the metal is taken out from the mold material, and the surface is polished, so that a crown is manufactured.

  Next, the manufactured crown is put on a partial plaster model of a tooth to be covered with the crown, and this is returned to the work model 25 installed in the articulator 4 to adjust the contact state with the adjacent tooth, or occlusion Move the upper gypsum model with the vessel 4, recreate the movement of the jaw and watch the meshing, etc., scraping the crown surface, adjusting the fine groove of the crown, etc., and manufacturing the crown.

  As described above, in the present embodiment, an impression is obtained using the impression tray 1 including the instruction mark rod 14, and the through-hole 151 of the ball 15 positioned using the instruction mark rod 14 is obtained. Since the work model 25 is manufactured by inserting the incisal pin 46 of the articulator 4, the reproducibility of the impression of the upper and lower jaws and the engagement is high. In addition, since it is not necessary to produce a work model while looking at the face photograph of the patient, it is possible to obtain a work model in which the positional relationship between the patient's nasal muscles and jaws is accurately reproduced without labor. And since a dental prosthesis is manufactured using the working model in which the characteristic in a patient's oral cavity was reproduced, the dental prosthesis suitable for the state in a patient's oral cavity can be manufactured.

  As mentioned above, although embodiment of this invention was described, this invention is not limited only to the above-mentioned embodiment, Of course, various changes can be added within the range which does not deviate from the summary of this invention. Explained.

<Second Embodiment>
In the above-described embodiment, the plaster model of the upper and lower jaws was manufactured by pouring gypsum into the acquired impression, but the acquired impression was directly read by a CAD / CAM system, and a work model was manufactured using 3D printer technology. You can also Specifically, the impression tray 1 is used to obtain the patient's impression, and the impression surface is held with the impression tray 1 with an optical reading means based on the guide mark stick while holding the impression material. to scan.

  As a technique for producing a dental prosthesis using a CAD / CAM system that is currently known, for example, techniques described in JP 2007-209575 A, JP 2012-217622 A, and the like can be cited.

  In the CAD / CAM system, scanned 3D data is taken into the CAD, a working model in which the positional relationship between the patient's nasal muscle and jaw is accurately reproduced by the CAD is designed, and the design data is transmitted to the CAM. Then, a working model is manufactured by CAM and finished.

<Third Embodiment>
Further, the above-described impression tray 1 is configured by connecting and fixing the tray main body 12 and the instruction mark portion 11. However, like the impression tray 201 illustrated in FIG. 10, the instruction mark portion 211 includes the tray main body 212. It is good also as a structure which can be attached or detached from. In FIG. 10, the same components as those of the impression tray 1 are denoted by the same reference numerals, and the description thereof is omitted. The configuration in which the tray main body has a screen and a frame is the same as that of the impression tray 1, and the description thereof is omitted here.

  As shown in FIG. 10, the impression tray 201 includes a tray main body 212 and a guidance mark 211 connected to the tray main body 212. The instruction mark 211 has a fixing screw 13 at one end and a protrusion 211a at the other end. The tray body 212 is provided with a recess 2121 that allows the protrusion 211a to be inserted and removed, and the instruction mark 211 is detachable from the tray body 212. As a result, when the impression tray holding the impression material is transported, the instruction mark portion 211 can be removed from the tray main body 212 and can be transported in a reduced size.

<Fourth Embodiment>
In the above-described embodiment, the instruction mark rod 14 is configured to be detachable from the ball 15, but the instruction mark rod may be fixed to the ball 15. At this time, the guide mark stick has a shape in which the guide mark stick protrudes from each of the two openings that penetrate the ball 15 and form the through hole 151. In this way, the guidance mark rod may be pivotally attached to the guidance mark portion connected to the tray body. When the work model is manufactured using the impression tray in which the instruction mark stick 14 is fixed to the ball 15 as described above, the instruction mark stick 14 is used instead of the incisal pin 46 of the articulator 4 described above. be able to. For example, the incisal pin 46 of the above-mentioned articulator 4 can be removed, the guidance mark rod 14 can be installed instead, the position can be adjusted, and the position can be fixed by the incisal pin screw 49.

<Fifth Embodiment>
In the above-described embodiment, the impression tray is positioned using the incisal pin 46 when the upper jaw plaster model 25a and the lower jaw plaster model 25b are manufactured. However, the present invention is not limited to this. For example, when making an upper and lower jaw plaster model in advance using the impression material obtained from the impression tray 1 and bonding the plaster model and the base with the second plaster, The impression tray may be positioned by inserting the incisal pin of the articulator into the hole of the ball positioned by the guidance mark stick when the impression is acquired. Specifically, a work model can be manufactured as follows.

  First, a sheet is affixed to the frame 16 so that the impression materials 23a and 23b having impressions of the upper jaw and the lower jaw surround the substantially arcuate 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 23a and the impression material 23b in the Z-axis direction. Thereby, a space surrounded by the walls formed by the upper and lower jaw impression materials 23a and 23b and the sheet is formed.

  Next, the first plaster is poured into the space formed by the upper jaw impression material 23a and the sheet, and the first plaster is poured into the space formed by the lower jaw impression material 23b and the sheet. The first gypsum is cured and the sheet is peeled off to produce the upper and lower jaw plaster models 25a and 25b.

  Next, a hole in which a dowel pin is implanted is provided on a surface of the upper jaw facing the impression material 23a on the upper jaw facing the impression material 23a so as to correspond to the tooth portion to be crowned and the other tooth portion. . Thereafter, a dowel pin is planted in the hole, and the dowel pin is fixed to the upper plaster model 25a. Similarly, a dowel pin is planted and fixed to the gypsum model 25b of the lower jaw.

  Next, the second plaster is placed on the surface of the upper jaw plaster model 25a on which the dowel pin is planted and on the surface of the lower jaw plaster model 25b on which the dowel pin is 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 disposed on the articulator 4. This state is maintained and it waits until the 2nd gypsum hardens | cures.

  After the second plaster is cured, the impression tray 1, the upper jaw impression material 23a, and the lower jaw impression material 23b are removed, and the work model is completed. The work model manufactured in this way is the second gypsum in a state where the incisal pin 46 of the articulator 4 is inserted into the through hole 151 of the ball 15 that is positioned and fixed by the guide mark rod 14 at the time of taking an impression. Therefore, the positional relationship between the patient's nasal muscles and jaws is accurately reproduced.

  In addition, by this manufacturing method, dowel pins pierce the second plaster on the second plaster provided between the upper jaw plaster model (mandible plaster model) and the upper jaw base 31 (lower jaw base 32). This provides a hole into which the dowel pin is inserted. Thereby, when the tooth model of the portion to be covered with the crown is cut out from the gypsum model, the cut gypsum model is provided with a dowel pin, and a hole into which the dowel pin is inserted is provided in the second gypsum. . With this configuration, the dowel pin can be used as a positioning pin, and the cut out plaster model can be returned to the original work model or removed.

<Sixth Embodiment>
In the first embodiment, as a variable mechanism that makes the position of the ball 15 variable relative to the tray body 12, the space portion 17 that allows the ball 15 to move on the XY plane is provided. It is not limited to. For example, the instruction mark portion on which the ball is installed is configured to be separable from the tray body, and the relative position of the instruction mark portion with respect to the tray body can be arbitrarily adjusted. 12 may be relatively variable. This will be described below with reference to FIGS.

  FIGS. 11-16 is a figure showing the impression tray 501 of this embodiment. FIG. 11 is a schematic plan view of the impression tray 501 and shows a state in which the lid-like member of the positioning member is closed and the flange portion of the guidance mark portion is fixed by the positioning member. FIG. 12 is a schematic plan view of the impression tray 501 shown in FIG. 11 with the lid-like member of the positioning member opened. FIG. 13 is a schematic side view of the impression tray 501 shown in FIG. 11, and shows a state where the lid-like member of the positioning member is closed and the instruction mark portion and the tray body are separated from each other. 14 is a cross-sectional view taken along line XV-XV in FIG. 15 and 16 are schematic rear views for explaining the variable mechanism of the impression tray 501. FIG. 15 shows a state in which the lid member of the positioning member is opened, and FIG. 16 shows the lid member of the positioning member. Indicates the closed state.

  Similar to the first embodiment, the impression tray 501 according to the present embodiment is a triple tray that acquires three impressions of upper and lower jaws and occlusion, and is a tray that is assumed to acquire the entire dental arch. . The impression tray 501 is configured to hold an impression material that takes an impression by being inserted into the oral cavity of a patient and biting.

  The impression tray 501 includes a tray body 512, a positioning member 521, a guidance mark portion 511, a guidance mark bar 14, a ball 15, and a fixing screw 513 as a rotation stopper.

  As shown in FIGS. 11 and 12, the tray main body 512 includes a frame and a screen as in the first embodiment. Since the configuration of the frame and the screen is the same as in the first embodiment, description thereof is omitted. The tray main body 512 and the positioning member 521 are coupled to each other, and the tray main body 512 and the positioning member 521 and the instruction mark portion 511 are configured to be separable.

  As shown in FIG. 12, the positioning member 521, which is a variable mechanism, is coupled to the vicinity of the central portion of the arch that is the side from which the impression of the front teeth of the tray main body 512 is taken when taking an impression using the impression tray 501. The The positioning member 521 includes a box-shaped member 5212 and a lid-shaped member 5211 which are connected by a hinge structure. The lid member 5211 is provided with a shaft cylinder 529 having a hole 527. The box-shaped member 5212 has a U-shaped recess 528 in which the shaft cylinder 529 is inserted. Further, the box-shaped member 5212 has a plurality of holes 526 respectively provided on the facing surface forming the recess 528 and the side wall surface of the box-shaped member positioned in parallel with the surface. The plurality of holes 526 and the hole of the shaft cylinder 529 provided in the lid-like member 5211 are arranged in a straight line, and a pin is provided so as to penetrate all of these holes, thereby forming a hinge structure. In the positioning member 521, the lid-like member 5211 can be opened and closed with a pin as an axis.

  Further, as shown in FIGS. 12, 15 and 16, the positioning member 521 is formed by connecting the box-like member 5212 and the lid in a state where the lid-like member 5211 is closed at the end opposite to the end where the hinge structure is formed. A fixing screw 541 for fixing the member 5211 is provided. The fixing screw 541 can be inserted into the through-hole 523 whose inner wall surface is provided in the lid-like member 5211 and the inner wall surface provided in the box-like member 5212 is into the female screw-like hole 524. .

As shown in FIG. 15, in a state where the lid-like member 5211 is opened, the fixing screw 513 is inserted and held only in the through hole 532.
As shown in FIG. 16, when the lid-like member 5211 is closed, the fixing space 530 having a substantially rectangular parallelepiped shape composed of the opening space 530a of the box-like member 5212 and the opening space 530b of the lid-like member 5211 is a positioning member. 521 is formed. The inner bottom surface of the box-shaped member 5212 and the inner bottom surface of the lid-shaped member 5211 are parallel to each other.

  In the positioning member 521 having a rectangular parallelepiped outer diameter in a state where the lid is closed, an opening 534 that communicates with the fixing space 530 is formed on the side surface 521a of the positioning member 521. When the lid-like member 5211 is closed and the box-like member 5212 and the lid-like member 5211 are fixed, the fixing screw 541 is inserted into the through-hole 532 and the hole 533, the screw is tightened, and the positioning member 521 has a lid. The shape is a closed cuboid. 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-shaped member 5212 and the lid-shaped member 5211. It is shorter than the distance of the inner bottom.

  As shown in FIG. 13, the guidance mark portion 511 has a shape in which a flange portion 5111 and a ball setting portion 5112 are coupled. The instruction mark part 511 has a ball 15 and a holding part (reference numeral 5114 in FIG. 14) which holds the ball 15 rotatably at one end. A flange portion 5111 that is the other end of the guidance mark portion 511 is a portion that 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 installation 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 vertical length of the flange portion 5111 in the X-axis direction and the horizontal length in the Y-axis direction are smaller than the vertical length and the horizontal length of the fixing space 530, respectively. Thereby, when arrange | positioning the flange part 5111 in the opening space 530a of the box-shaped member 5212, the arrangement position of the flange part 5111 can be changed arbitrarily. Then, by changing the arrangement position of the flange portion 5111, the positional relationship between the center line of the instruction mark portion 511 along the longitudinal direction of the instruction mark portion 511 and the center line of the tray main body 512 along the X-axis direction can be arbitrarily set. Can be adjusted.

  As shown in FIG. 15, the flange portion 5111 is disposed in the opening space 530 a of the box-shaped member 5212 with the lid-shaped member 5211 of the positioning member 521 being opened when the instruction mark portion 511 is positioned. While the guidance mark portion 511 is positioned, the lid-like member 5112 is open. Then, after positioning the instruction mark 511, as shown in FIG. 16, the lid-like member 5211 is closed, and the box-like member 5212 and the lid-like member 5211 are fixed by the fixing screw 541, whereby the flange portion 5111. Is fixed so that its position does not move in the fixing space 530.

  The ball installation part 5112 is a grip part that the user has when working, and has a long shape in the X direction. The instruction mark portion 511 includes a ball 15, a holding portion 5114, and a fixing screw 513 at one end, and the other end is coupled to the flange portion 5111.

The guidance mark part 511 includes a spherical ball 15 and a holding part 5114.
The ball 15 has a through-hole 151 into which the guidance mark rod 14 is inserted. The guide mark rod 14 is configured to be inserted into and removed from the through hole 151.

  As shown in FIG. 14, the holding portion 5114 is a substantially spherical space that is formed inside the instruction mark portion 511 and is slightly larger than the ball 15. The holding part 5114 is spatially connected to openings 5116 and 5113 provided on both upper and lower surfaces of the instruction mark part 511, and the instruction mark part 511 is made thick by the holding part 5114 and the opening parts 5116 and 5113. A through hole penetrating in the direction (Z-axis direction) is formed. The openings 5116 and 5113 have a substantially circular planar shape, and the diameter thereof is set smaller than the diameter of the ball 15. As a result, the ball 15 is not detached from the instruction mark 511.

  The ball 15 is held by a holding unit 5114 and is configured to be rotatable within the holding unit 5114. In addition, the instruction mark rod 14 inserted into the ball 15 protrudes from the opening 5116. By rotating the ball 15 around the center of the ball 15 in a state where the guidance mark rod 14 is inserted into the through hole 151 of the ball 15, the inclination of the guidance mark rod 14 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 an inner wall surface of a female screw shape formed in the X-axis direction from the side surface of the instruction mark portion 511 toward the holding portion 5114. A space is connected between the hole 5115 and the holding portion 5114. When the fixing screw 513 is turned and tightened so as to push the ball 15 toward the inner wall surface of the holding portion 5114, the fixing screw 513 stops the rotation of the ball 15, and the position of the ball 15 is set in the holding portion 5114. Secure with. Further, the ball 15 can be rotated in the holding portion 5114 by loosening the fixing screw 513.

  When the impression tray 1 holding the impression material is chewed in the patient's oral cavity to obtain the upper and lower impressions (the shape of the upper and lower jaw teeth) and the engagement, the flange of the guidance mark 511 The part 5111 is disposed in the opening space 530a of the box-shaped member 5212 with the lid-shaped member 5211 opened, and while looking at the front of the patient, the patient's nasal muscles and the guide mark rod 14 are aligned. The flange portion 5111 is moved on the inner bottom surface of the box-shaped member 5212, and the inclination of the guidance mark bar 14 is adjusted. Then, the lid member 5211 is closed at the position where the patient's nose muscles and the guide mark rod 14 coincide with each other, and the lid member 5211 and the box member 5212 are fixed by the fixing screw 541 to fix the flange portion 5111 to the fixed space. It fixes so that it may not move within 530, Furthermore, it fixes so that the ball | bowl 15 may not be rotated with the screw 513 for fixing.

  As described above, in the impression tray 501 of the present embodiment, the instruction mark 511 and the tray body 512 can be separated from each other, and the instruction mark 511 is fixed at an arbitrary position by the positioning member 521 coupled to the tray body 512. Since the configuration is possible, the position of the ball 15 can be changed relative to the tray body 12. Further, by providing a structure in which the ball 15 is rotatable and a fixing screw 513 for fixing the position of the ball 15 and stopping the rotation of the ball 15 is provided, an instruction mark inserted into the through hole 151 of the ball 15 is provided. It becomes 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 taking an impression may be provided on the teaching mark bar 14. Hereinafter, a description will be given with reference to FIG. In addition, the same code | symbol is attached | subjected about the same structure of the above-mentioned impression tray 1, and the description is abbreviate | omitted.

  As shown in FIG. 17, the impression tray 601 has auxiliary pins 602 that penetrate the instruction mark bar 14 and are arranged and fixed perpendicular to the instruction mark bar 14. The auxiliary pin 602 is provided so as to be positioned under the patient's nose when the patient bites the impression tray 601 at the time of taking an impression. The tip of the auxiliary pin 602 is aligned with the vicinity of the center of the nasal column, and the inclination of the guidance mark bar 14 can be adjusted to match the nose muscle so that the tip of the auxiliary pin 602 does not move. As described above, the auxiliary pin 602 is disposed at a position close to the center of rotation of the guidance mark bar 14, so that it is easy to adjust the inclination of the guidance mark bar 14 to match the nose. Thereby, the working model which can reproduce the inside of a patient's oral cavity more can be manufactured.

1, 201, 501, 601 Impression tray 11, 211, 511 Guiding mark part 12, 212, 512 Tray body 13, 513 Fixing screw (rotation stop part)
14 Rod for guidance mark 15 Ball 16 Frame 17 Space part 20 Screen 23a Upper impression material 23b Lower jaw impression material 25 Work model 46 Insal pin (positioning rod)
131, 5114 Holding portion 151 Through hole (ball hole)
521 Positioning member A Nasal muscle

Claims (8)

An impression tray that holds an impression material that obtains an upper and lower impression and engagement by inserting into a patient's mouth and biting,
A tray body having a screen formed of a thin film and having an occlusal portion, and a frame supporting at least a part of the outer periphery of the screen;
A guidance mark having a ball connected to the tray body and provided with a hole into which a stick for a guidance mark is inserted; and a holding portion for rotatably holding the ball;
An impression tray comprising: a variable mechanism capable of changing a position of the ball relative to the tray body. The impression tray according to claim 1,
The variable mechanism has a space portion provided in the instruction mark portion and movable in a state where the ball is held by the holding portion. The impression tray according to claim 2,
The instruction mark is detachable from the tray body. The impression tray according to claim 1,
The instruction mark portion is provided with the ball and the holding portion at one end,
The variable mechanism is a positioning member that is coupled to the tray body and is capable of fixing the other end of the instruction mark at an arbitrary position. The impression tray according to any one of claims 1 to 4,
The impression tray further includes an anti-rotation portion that stops the rotation of the ball held by the holding portion. The impression tray according to any one of claims 1 to 5,
The frame is an impression tray that detachably supports the screen. Impression material is placed up and down on the screen of the impression tray according to any one of claims 1 to 6,
Taking the upper and lower impressions and meshing by inserting the tray body into the patient's oral cavity and biting the upper and lower impression materials on the screen,
In a state where the upper and lower impression materials piled up on the screen are bitten, the position of the ball is moved so that the guide mark stick inserted in the hole of the ball matches the nose of the patient, After rotating the ball, pull out the guidance mark stick from the hole of the ball,
The impression tray into which the plaster is poured into the impression space of the impression tray is installed in the articulator in which the positioning rod is previously installed, and the positioning rod is inserted into the hole of the ball and installed. How to make. An impression tray that holds an impression material that obtains an upper and lower impression and engagement by inserting into a patient's mouth and biting,
A tray body having a screen formed of a thin film and having an occlusal portion, and a frame supporting at least a part of the outer periphery of the screen;
An instruction mark portion connected to the tray body and pivotally attached to a stick for an instruction mark; and
An impression tray comprising: a variable mechanism capable of changing a position of the ball relative to the tray body.

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