KR101108627B1 - Plate Mechanism for Occlusal Reconstruction of Intraoral Impression Model Image with Reference Geometry - Google Patents

Abstract

The molding plate mechanism for the upper and lower jaw plaster models includes a plate-shaped body, a receiving portion recessed in an upper surface of the body, and a three-point coordinate selected from a surface contour of the projecting portion as a portion formed to protrude into the receiving portion. A molding plate for upper and lower jaw gypsum models, comprising a reference shape capable of extracting one circular plane from the surface, wherein the plurality of pillar coupling portions are formed to be symmetrical with respect to the accommodation portion on the outside of the accommodation portion. When the two molding plates for the upper and lower jaw gypsum models are paired up and down, the two upper and lower jaw gypsum model molding plates include a plurality of pillars coupled to the column coupling portion to be connected in parallel.

Description

Plate with reference marker for the image reconstruction of occlusal relationship}

The present invention relates to a plate mechanism for rebuilding occlusion on image data obtained by scanning the upper and lower jaw plaster models.

As CAD / CAM technology advances in the dental field, three-dimensional scanning of the intraoral impression model is indispensable for its use. As such, design and processing through images are expected to be widely used because they are advantageous in terms of precision and efficiency.

However, since the main purpose of the image acquisition of the dental model is to reconstruct the prosthesis, it is necessary to reconstruct the model image according to the patient's original occlusal relationship by any means. It should have all the necessary image fields, including the buccal plane and myocardial plane.

For this purpose, conventionally, scanning has been performed several times and the images are superimposed, or solved by scanning with impression materials having the shape of an opposing tooth.

However, this conventional method has the disadvantages that the scanning of the image several times, the accuracy is inferior due to the incompleteness of the overlapping algorithm, and has a limitation that can not be applied depending on the oral condition of the patient.

Accordingly, the present invention provides a plate-shaped body having a shape or a fixing portion that can be fixed at a specific position of the scanner, a plate having a reference shape that is formed on such a body to mount a plaster model, and two facing sides. By devising a plate for occlusal reconstruction with column and hinge columns and hinges to determine the spatial relationship between the plates, we can minimize the number of scanning and rebuild the occlusal relationship to the correct position without algorithmic image superposition. To provide.

Molding plate mechanism for upper and lower jaw gypsum model according to an embodiment of the present invention, the plate-shaped body, the receiving portion formed in the upper surface of the body and the surface contour of the protruding portion as a portion formed to protrude in the receiving portion A molding plate for upper and lower gypsum model including a reference shape that can extract a single circular plane from the coordinates of three points selected in the above, wherein the plurality of pillar coupling parts on the outside of the receiving portion is symmetrical with respect to the receiving portion And a plurality of pillars coupled to the column coupling part such that the two upper and lower gypsum model molding plates having the column coupling part paired up and down are connected in parallel to each other. do.

In addition, the molding plate mechanism for upper and lower jaw gypsum model according to another embodiment of the present invention, the plate-shaped body, the receiving portion formed in the upper surface of the body and the portion formed to protrude in the receiving portion of the protruding portion A molding plate for upper and lower gypsum models, comprising a reference shape capable of extracting a circular plane from three coordinates selected from surface contours, wherein the outer side of the receiving portion includes a plurality of legs and a plurality of legs facing the legs. A pillar coupling part is formed, and when the two molding plates for the upper and lower gypsum models are paired up and down, the legs facing each other are pivotally connected to each other so that the molding plates for the two upper and lower gypsum models are parallel to each other. It includes a plurality of pillars coupled to the pillar coupling portion.

In this case, it is preferable that the accommodating portion has a shape symmetrical with respect to an imaginary straight line crossing the body.

In addition, the reference shape is a three columnar projections, the top profile of the projections is characterized in that a shape capable of extracting a circle.

At this time, the top contour of the protrusion may be circular or polygonal shape inscribed or inscribed in a circle.

In addition, the protrusion is preferably a columnar tapered shape so that the upper side is narrower than the lower side.

In addition, the reference shape of the three columnar projections may be formed to be asymmetrical with respect to the center of the receiving portion.

Alternatively, the reference shape may be a protruding element having a top surface consisting of a circular arc and strings connecting both ends of the arc, or a protruding element having a top surface of a polygonal shape inscribed or circumscribed to a circle.

Meanwhile, the molding plate mechanism for the upper and lower jaw gypsum models according to the present invention may further include a hollow shaft having a pipe shape communicating with the receiving part on the lower surface of the body.

In addition, the lower surface of the body may be provided with a corresponding portion for connecting to a predetermined position on the image scanning device.

At this time, if the corresponding portion is made up of a plurality of holes or projections, the plurality of holes or projections are formed in asymmetric positions that do not point symmetry, respectively.

Molding plate mechanism for manufacturing the upper and lower gypsum model according to the present invention can form a reference shape in the plaster model that provides three coordinates that can effectively and intuitively extract the circle that is the reference of image registration in the spatial coordinates Therefore, the combination of image diagnosis technology and image processing technology can be successfully introduced into implant procedures.

In addition, the molding plate mechanism according to the present invention can be effectively matched by including the upper and lower occlusal relationship between the actual tooth structure image and the tooth structure image of the model, so that the simulated implant procedure plan is accurately reflected in the gypsum model without processing do.

1 is a view showing a series of processes for rebuilding the occlusal relationship of the upper and lower gypsum model using the molding plate mechanism according to the present invention.
2 is a perspective view showing an example of an impression tray provided with a radiopaque marker.
Figure 3 is a view showing a match between the dental structure image and the actual dental structure image of the mandibular gypsum model through the image of the radiopaque marker.
4 is a perspective view showing one embodiment of a molding plate.
5 is a perspective view showing another embodiment of a molding plate.
6 is a perspective view showing another embodiment of a molding plate.
7 is a view showing a series of processes for integrating the base portion and the mandible gypsum model made by the receiving portion of the molding plate mechanism according to the present invention.
Figure 8 is a perspective view of one embodiment of a molding plate mechanism according to the present invention.
9 is a perspective view showing another embodiment of a molding plate mechanism according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments of the present invention, descriptions of well-known configurations that will be apparent to those skilled in the art will be omitted so as not to obscure the subject matter of the present invention. In addition, when referring to the drawings it should be considered that the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

Meanwhile, terms used to describe embodiments of the present invention and define relative positions of front, rear, left and right, and the like used on the basis of the accompanying drawings. It should be noted, however, that such definitions of relative positions may be altered in an equivalent arrangement without changing the essential parts of the invention.

The present invention relates to a molding plate mechanism for manufacturing the upper and lower jaw gypsum model having a reference shape, the present invention includes a gypsum model that can match the dental structure image of the model to the actual dental structure image, including the upper and lower occlusal occlusion relationship It is to make. Therefore, to help understand the present invention, first, how to reconstruct the upper and lower jaw occlusion outside the mouth using a gypsum model manufactured by the molding plate apparatus according to the present invention.

1 is a view showing a series of processes for rebuilding the occlusal relationship of the upper and lower jaw plaster model using the molding plate mechanism according to the present invention. This sequence of steps is shown in alphabetical order.

(a) shows the basic configuration of the molding plate, the inner concave receiving portion is a space in which gypsum is poured, and protruding conical columnar protrusions. This protrusion creates a reference shape inside the upper and lower plaster models.

(b) corresponds to a process of integrating the mandible gypsum model by placing the mandible gypsum model on the molding plate and pouring the gypsum to form the receiving portion of the molding plate. Accordingly, the reference portion is formed into a cavity having a negative shape inside the base portion.

(c) shows the occlusal bite in which the upper and lower occlusal occlusal relationship of the subject is recorded in the form of unevenness. The occlusal bite is made by the person holding the horseshoe-shaped impression material similar to the arch form between the upper and lower jaw.

(d) shows the state where the occlusal bite is placed on the occlusal surface of the mandible gypsum model placed on the molding plate of (b) according to the occlusal surface, and the maxillary gypsum model is placed on the occlusal surface again. Accordingly, the upper and lower jaw plaster models are completely reconstructed in the actual occlusal relationship via the bite bite.

(e) shows a state where vertical pillars are inserted all over the molding plate of (d), and (f) is another molding plate that is identical to the molding plate for mandibular gypsum model, that is, for the maxillary gypsum model. The process of fitting and fixing the molding plate is shown. The lengths of the four columns are the same, so that the two molding plates are in parallel.

(g) shows the maxillary gypsum model completed by integrating gypsum into the molding plate for maxillary gypsum model in the state of (f), integrated with the base portion on which the reference shape is formed, like the mandible gypsum model.

The upper and lower mandible gypsum models made through the above process, as shown in (h) and (i), are respectively photographed with a three-dimensional CT, which is an image scanning device, and data is converted into model images. At this time, the mandible gypsum model as well as the maxillary gypsum model are photographed by CT with the base part placed on the floor. Therefore, the model image obtained from the maxillary gypsum model is inverted up and down.

In this case, when scanning the upper and lower plaster models with the image scanning device, the relative position of the image scanning device and the upper and lower plaster models should always be constant. This is because the upper and lower occlusal occlusal relationship can be restored by the computational process described later only when the coordinate values of the image data of each of the maxillary and mandibular gypsum models reflect the coordinate system of the image scanning device.

To this end, the image scanning apparatus should be provided with a sound shape corresponding to the shape of the base portion of the upper and lower gypsum model. Alternatively, a negative (hole) or positive (protrusion) may be made in the image scanning apparatus, and a corresponding positive or negative counterpart may be placed on the lower surface of the upper and lower gypsum model bases. Or it may be possible to have a positive or negative counterpart corresponding to the molding plate itself for the upper and lower gypsum models. After all, it is important to keep the relative position of the image scanning device and the upper and lower plaster models constant at all times regardless of the configuration.

The two model images through the above process are restored to the same upper and lower mandibular occlusion relationship by computer processing. (j)-(m) show how the computerization process works with the molding plate for better understanding.

(j) shows the initial overlap between the maxillary plaster model image and the mandibular plaster model image. As shown in (j), the images of the base part included in each of the upper and lower gypsum model images are completely overlapped, which means that the upper and lower gypsum models are inserted into one molding plate fixed at a predetermined position, that is, the projection for generating a reference shape. Are in a shared state with each other. Therefore, it is possible to superimpose the upper and lower gypsum model images in such a state by matching the reference shapes included in each model image.

(k) shows a 180 ° phase inversion to restore the upside down mandible gypsum model image to the actual maxillary relationship. Here the 180 ° phase inversion is also made using a simple geometric relationship to the reference shape.

The model image, which has been coarse up to step (k), is restored to the actual dental structure except for the vertical distance of the upper and lower jaw. Step (l) shows the vertical movement of the maxillary plaster model image by a certain distance to accurately restore the maxillary occlusal relationship, which is the distance between the molding plates for the parallel maxillary plaster model in step (f) above. Follow. That is, since the state (f) is the state where the occlusal state is physically fixed through the bite for the occlusion, the physical distance between the reference shapes facing up and down in this state is applied to the upper and lower gypsum model images as it is ( As shown in step m), restoration to the occlusal state is completed simply.

In addition, various methods for reflecting the actual occlusion in the model image have been devised by the present applicant, but details thereof will be omitted since they are outside the scope of the invention to be protected by the present application.

On the other hand, the process of matching the model image to the patient image is followed, which also falls outside the scope of the present application will be described briefly.

2 shows the impression tray 1 used to align the model image. The impression tray (1) has a horseshoe shape along the average dental arch, which is filled with a dental putty in the hollowed out space (2) and pressed into the shape of the patient's dental arch to form a space. Fill the impression material and bite into the mouth of the subject to form a mold that follows the maxillary and / or mandibular teeth. Plaster is poured into the mold and hardened to obtain a model of upper and lower plaster.

At this time, the image registration is performed by attaching a radiopaque marker 3 to each of three points of the impression tray 1, preferably, one part near the level line of the dental arch and two left and right sides, respectively, and performing 3D CT imaging. You can get the reference coordinate for. That is, the impression tray (1) equipped with a radiopaque marker (3) is bitten by the subject and CT scan to obtain a patient image, the plaster model is made with the impression tray (1) and the impression tray (1) is fitted When CT images are obtained from, the two images each contain images of markers, so when two images are superimposed based on the images of these markers, the model images are matched to the patient images.

Here, according to the above (a) ~ (m), the maxillary and mandibular gypsum model images are completely reconstructed to the occlusal relationship, so it is sufficient to include the image of the marker in either the maxilla or the mandible. 3 shows the mandible gypsum model image and the patient image matched by the image of the marker.

The molding plate 10 of the present invention used to rebuild the occlusal relationship of the upper and lower jaw plaster models will now be described with reference to FIGS. 4 to 6.

4 is a perspective view showing an example of a molding plate 10 provided with a protrusion 16 ′ for generating a reference shape in the upper and lower gypsum models.

As shown in FIG. 4, the molding plate 10 has a plate-shaped body 12 having a flat bottom surface, and an accommodating portion 14 formed on the upper surface of the body 12 is recessed. ) Forms the space where the plaster is poured. In the receiving portion 14, the reference shape 16 is formed to protrude. The protruding reference shape 16 has a space that is the same as the shape of the reference shape, more precisely the shape of the reference shape 16, inside the upper and lower plaster models. Create Of course, the present invention does not exclude making the reference shape 16 into the shape (negative shape) of the hole. However, in this case, the projection shape is made in the plaster model, and considering the strength of the plaster, the projection shape is not preferable in that the risk of breakage is high. Hereinafter, "the same space as the shape of the reference shape 16" formed inside the gypsum model by the reference shape 16 of the molding plate 10 will also be referred to as a reference shape, but only for the purpose of distinguishing the two. When referring to reference shapes made inside the model, reference numerals will not be given.

A method of software registration of two images using a reference shape is as follows. First, by selecting three coordinates in the surface contour of the projected part of the reference shape in software, one circular plane can be extracted from these coordinates. This circular plane becomes the reference plane in the image processing process. When matching two images, that is, the image of the tooth structure of the model and the image of the tooth structure of the model, the coordinates of the center of the reference circle included in each image and the plane of the reference circle are included. By matching the vectors in the three-dimensional space with each other, image registration can be easily achieved.

The three coordinates are selected here because the minimum number of coordinates for extracting the circle from the spatial coordinates is three. In addition, not selecting more than three coordinates is the number of _n C ₃ where three or more coordinates do not form a circle, where n is the number of selected coordinates, where n> 4 Data), which is inefficient because it does not differ from the matching of surface shapes based on isomorphism.

One embodiment possible as such a reference shape 16 consists of three columnar projections 16 ', as shown in FIGS. 4 and 5, the top profile of the projection 16' being one circle. It is to make a shape that can be extracted. Therefore, in this case, the three coordinates for determining the reference circle become the center of each circle extracted from the top contour of the three protrusions 16 '.

The top contour of the projection 16 'from which one circle can be extracted is numerous. Most intuitively, it may be a circular contour as shown in FIG. 4, or in addition, it may be a polygonal contour inscribed or circumscribed to a circle such as represented by an equilateral triangle in FIG. 5. The shape of the polygon may be a regular polygon that is easy to calculate and verify and to intuitively recognize the center of the circle.

In addition, it is advantageous in that the projection 16 'is formed in a tapered pillar shape so that the upper portion thereof is narrower than the lower portion thereof. In addition, when the reference shape 16, which is three pillar-shaped protrusions 16 ', is formed to be asymmetrical with respect to the center of the receiving portion 14, the completed gypsum model for CT imaging and the like is put back on the molding plate 10. You can always have a certain orientation when seating.

On the other hand, another embodiment which is possible as the reference shape 16 is shown in FIG. 6. The reference shape 16 consists of one protruding element 16 "having an upper surface consisting of an arc and a string connecting both ends of the arc. The three points selected in this semicircle-like shape consist of one point on the arc and two points defining both ends of the chord. The above projecting reference shape (16 ") is inscribed or inscribed in a circle. It is also possible to have a polygonal top surface. Since this projecting element, the reference shape 16 "is made sufficiently larger than the above-mentioned projection marker 16 ', it is possible to extract a circular plane with satisfactory precision from the top contour of the projecting element 16". Can be.

In addition, the receiving portion 14 of the molding plate 10 may be made in a shape forming a left-right symmetry with respect to an imaginary straight line across the body 12. This is to form a molding plate mechanism 100 to be described later, to arrange the two molding plate 10 in the direction in which the receiving portion 14 face each other and according to the occlusal relationship of the upper and lower gypsum model on the molding plate 10 When positioned, this is to allow the receiving portion 14 to include the bottom of the upper and lower gypsum model if possible (see Fig. 1 (f)). This minimizes the size of the molding plate 10 while allowing the base portion supporting the gypsum model to be sufficiently large to facilitate handling of the gypsum model.

In addition, the molding plate 10 of the present invention may further include a hollow shaft 18 having a pipe shape communicating with the receiving portion 14 on the lower surface of the body 12. The role of the hollow shaft 18 is various, first, the female screw plug is inserted into the hole formed in the receiving portion 14 by the hollow shaft 18 and the plaster can be poured so that the female screw plug is embedded in the bottom of the plaster model { See FIG. 7 (i)}. Female thread plugs are used to fasten the upper and lower plaster models directly to a three-dimensional CT or 5-axis machine.

The hollow shaft 18 may also be used to blow compressed air so that the gypsum model can be easily separated from the molding plate 10 (see FIG. 7 (g)), or the molding plate 10 itself on which the gypsum model is mounted. Can also be used for direct attachment to 3D CT or 5-axis machines.

The process of integrating the base part made by the receiving part 14 and the mandible gypsum model using the molding plate 10 of the present invention having the above configuration will be described below with reference to FIG. 7. 7 illustrates only a process of integrating the base part and the mandible gypsum model, it is clear that this process can be applied to the method of rebuilding the occlusal relationship of the upper and lower mandible gypsum models described with reference to FIG. 1.

First, as shown in (a)-(b), some of the bottoms of the upper and lower gypsum models (here, the lower gypsum models) are slightly cut into lozenges. The cutting groove is for increasing the bonding force with the base portion.

Then, as in (c) to (d), a molding plate is prepared and a female screw plug is inserted into a hole formed in the receiving portion 14 by the hollow shaft.

Then, as in (e) ~ (f), the plaster is poured into the receiving part of the molding plate, and the mandibular gypsum model with the cutting groove is placed on it, and the gypsum is hardened sufficiently to integrate the base part and the mandible gypsum model.

(g) shows the process of separating the gypsum model from the molding plate by blowing compressed air through the hollow shaft, and through this series of steps, the finished mandible gypsum model as shown in (h) and (i) is obtained. .

On the other hand, the molding plate 10 for upper and lower jaw gypsum model having the configuration as described above, as shown in Figure 8, two pairs to form one molding plate mechanism 100. This molding plate mechanism 100 is used for the purpose of rebuilding the occlusal relationship of the upper and lower jaw plaster models described with reference to FIG.

In this case, a plurality of pillar coupling portions 20 are formed to be symmetrical with respect to the accommodation portion 14 on the outer side of the receiving portion 14 of the molding plate 10, and a plurality of pillars coupled to the pillar coupling portion 20. The two molding plates 10 are connected to each other so that the receiving portions 14 are parallel to each other while facing each other.

And the lower surface of any one of the body 12 of the molding plate 10 constituting the molding plate mechanism 100 may be further provided with a hollow shaft 18 of the pipe shape in communication with the receiving portion (14). Since the structure and function regarding this hollow shaft 10 are the same as the content mentioned above, the overlapping description is abbreviate | omitted.

It is also possible to make another embodiment of the molding plate mechanism 100 'by slightly modifying the manner in which the two upper and lower plaster model molding plates 10 are connected, which is shown in FIG. 9 is compared with the embodiment illustrated in FIG. 8, a portion of the configuration consisting of a plurality of pillar coupling portions 20 and pillars 22 is a bridge 24 coupled by a hinge 26. Is replaced by That is, a plurality of legs 24 and a plurality of pillar coupling parts 20 opposite to each other are formed on the outside of the receiving portion 14, and when the two molding plates 10 for upper and lower jaw models are paired up and down, The difference is that the opposite legs 24 are pivotally connected to the hinge 26.

As such, when the two molding plates 10 are connected up and down through the hinge coupling, the process of completely removing and reassembling the molding plates 10 may be omitted, thereby increasing convenience in handling and storage. . Herein, the hollow shaft 18 having a pipe shape communicating with the receiving portion 14 may be further provided on the lower surface of the body 12 of the molding plate 10 as in the above case.

Meanwhile, FIG. 10 shows that a counterpart 28 is formed on the bottom surface of the body 12 of the molding plate 10 to maintain the relative position of the image scanning apparatus 30 and the upper and lower plaster models at all times. As described above, why the relative position between the image scanning device 30 and the upper and lower jaw plaster models should always be constant when the upper and lower jaw plaster models are scanned by the image scanning device 30. 10 illustrates the embodiment of FIG. 9 with a hinge 26 as an example, but the configuration of the counterpart 28 may be applied to the embodiment of the molding plate mechanism 100 shown in FIG. 8 as it is. Of course.

As such, the counterpart 28 provided in the molding plate mechanism 100 ′ is always placed in a constant position on the image scanning apparatus 30 having a corresponding shape. The counterpart 28 may be a negative hole as shown in the figure, or may be a positive protrusion.

And when the correspondence part 28 consists of several holes or protrusions, many holes or protrusions are formed in the asymmetrical position which does not make point symmetry. Accordingly, the molding plate mechanism 100 ′ is not coupled to the image scanning device 30 in the shifted direction.

While the preferred embodiments of the present invention have been illustrated and described above, it will be apparent to those skilled in the art that the present embodiments may be modified without departing from the spirit or spirit of the present invention. Therefore, the scope of the present invention will be defined by the appended claims and equivalents thereof.

Description of the Related Art
10: Molding plate for upper and lower gypsum model
12: body 14: receiving portion
16: reference shape 16 ': reference shape that is a projection of the column shape
16 ": Reference shape as protrusion element 18: Hollow shaft
100, 100 ': Molding plate mechanism for upper and lower plaster model
20: column coupling portion 22: pillar
24: leg 26: hinge
28: correspondence unit 30: image scanning device

Claims (12)

Plate-shaped body;
Receiving portion formed recessed in the upper surface of the body; And
As a part formed to protrude in the receiving portion, a reference shape for extracting one circular plane from the coordinates of three points selected from the surface contour of the protruding portion;
The two upper and lower gypsum model moldings are formed on the outer side of the accommodating part such that a plurality of column coupling parts are symmetrical with respect to the accommodating part, and when the two upper and lower gypsum model molding plates having the column coupling part are paired up and down. Molding plate mechanism for the upper and lower jaw gypsum model comprising a plurality of pillars coupled to the pillar coupling portion so that the plate is connected in parallel. Plate-shaped body;
Receiving portion formed recessed in the upper surface of the body; And
As a part formed to protrude in the receiving portion, a reference shape for extracting one circular plane from the coordinates of three points selected from the surface contour of the protruding portion;
A plurality of legs and a plurality of column coupling portions facing the legs are formed on the outside of the receiving portion, and when the two molding plates for the upper and lower gypsum models are paired up and down, the legs facing each other are pivotally rotatable. Connected, the molding plate mechanism for the upper and lower jaw gypsum model comprising a plurality of pillars coupled to the pillar coupling portion so that the molding plate for the two upper and lower jaw gypsum model is parallel. The method according to claim 1 or 2,
The receiving portion of the upper and lower gypsum model molding plate mechanism, characterized in that the symmetrical shape with respect to the imaginary straight line across the body. The method according to claim 1 or 2,
The reference shape is three columnar projections, the upper surface contour of the projection molding plate mechanism for upper and lower jaw gypsum model, characterized in that the shape can extract a circle. The method of claim 4,
Molding plate mechanism for upper and lower jaw gypsum model, characterized in that the top surface of the projection is circular or polygonal shape inscribed or inscribed in a circle. The method of claim 4,
The protrusion is a molding plate mechanism for upper and lower jaw gypsum model, characterized in that the upper side is tapered column shape narrower than the lower side. The method of claim 4,
And a reference shape of the three columnar protrusions is formed asymmetrically with respect to the center of the receiving portion. The method according to claim 1 or 2,
The reference shape is a molding plate mechanism for upper and lower jaw gypsum model, characterized in that the projecting element having a top surface consisting of a string connecting the both ends of the arc and the arc. The method according to claim 1 or 2,
The reference shape is a molding plate mechanism for upper and lower jaw gypsum model, characterized in that the projecting element having a top surface of the polygon shape inscribed or circumscribed to the circle. The method according to claim 1 or 2,
Molding plate mechanism for upper and lower jaw gypsum model, characterized in that the lower surface of the body is further provided with a hollow shaft of pipe shape in communication with the receiving portion. The method according to claim 1 or 2,
Molding plate mechanism for upper and lower jaw models, characterized in that the lower surface of the body is provided with a corresponding portion for connecting to a predetermined position on the image scanning device. The method of claim 11,
The corresponding portion is formed of a plurality of holes or projections, the plurality of holes or projections molding plate mechanism for upper and lower jaw models, characterized in that each formed in an asymmetrical position that does not make a point symmetry.

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