JP4822818B2 - Removable model base molding tray for dental prosthesis - Google Patents

Description

  The present invention relates to a molding tray for creating a gypsum base of a removable removable model for a dental technician used when preparing a dental prosthesis such as a cast crown restoration in dentistry. The present invention relates to a base mold forming tray of a removable model for dental technicians for forming a removable removable mold.

  When creating a dental prosthesis, etc., an impression material is inserted into the patient's oral cavity, a dental mold is taken, solidified by injecting plaster into it, and then extracted to obtain an impression model . One or several teeth are divided from this impression model, cut out, and are subjected to technical work such as casting crown restoration or crown restoration. In addition, the extracted tooth model is restored to the state before division as necessary, and the presence or absence of interference between the created prosthesis and the adjacent teeth and the occlusal state with the counter teeth are adjusted. At this time, in order to improve the quality of the prosthesis, it is necessary to accurately reproduce the positional relationship between the tooth model and the tooth model of the adjacent teeth taken out separately.

  Therefore, conventionally, needle-like instruments called dowel pins have been embedded in the impression model, and the positional relationship of the impression model has been reproduced by engaging holes provided in a base made of gypsum and dowel pins. In the impression tooth mold, fix the dowel pin so that it does not come into contact with the impression material and pour the plaster on the impression model, or after the plaster poured on the impression has solidified, The bottom surface is shaved flat with a trimmer, a hole is made at a position that is directly below each tooth, and a dowel pin is inserted and fixed with an adhesive. After that, anti-rotation is formed in the vicinity of the dowel pin, a release agent is applied to the bottom of the impression model, and it is left on a tray filled with gypsum mud. After the gypsum is solidified, it is demolded and integrated with the base. I had a working model for a dental technician.

From this work model, the prosthesis is created by cutting out the part to be worked, removing it from the base and reinserting it, and adjusting the contact condition with the adjacent tooth and the occlusal condition with the opposing tooth. It was.
However, in this form of working model for dental technicians, there are many manual operations that require skill and time, such as drilling in the bottom of the impression model, embedding dowel pins, forming anti-rotation, and integral molding with the base, Productivity did not increase.
Also, when trying to form a split removable model for continuous teeth or structures with long posts, there is not enough space to plant the dowel pin, or when the bottom of the impression model is scraped flat or a hole is made for the dowel pin. There were various difficulties due to the danger of perforating the post when opening.

  In addition, to create a removable model that can accurately restore the position of the impression model with this method and is stably fixed at the restored position, the bottom surface of the impression model can be finished smoothly, or a mold release agent can be used. It required a certain level of skill, such as applying as thin as possible. Furthermore, even if the removable model is made precisely, if the foreign material such as gypsum powder or wax powder adheres to the dowel pin hole or the surface of the base, the impression model and the base will not accurately engage, There was a drawback that the reproducibility was lowered.

  Therefore, as one of methods for solving these drawbacks, Patent Document 1 discloses a method of creating a base using a plate in which dowel pins are previously planted. In the disclosed invention, as shown in FIG. 5, a large number of dowel pins are planted and integrally formed on the lower surface of the plastic plate along the dentition direction. It has been excavated. After applying the impression model with the bottom trimmed to the top surface of this plate with adhesive, apply the release agent to the bottom surface of the plate and push it into the base molding tray filled with gypsum mud beforehand, and the gypsum mud solidified After removing the mold, a working model is obtained.

  If the base creation method of the disclosed invention is used, the work of embedding dowel pins in the impression model can be omitted. In addition, since a number of anti-rotation grooves are cut in advance on the bottom surface of the plate, there is no need to manually provide anti-rotation grooves on the bottom of the impression model. can do.

  However, this disclosed invention cannot solve the problem that the impression model and the base are not correctly engaged due to adhesion of gypsum powder or wax powder. Further, in the base preparation method of the disclosed invention, the planting position of the dowel pin is determined in advance, and therefore the impression model must be accurately affixed to the plate so that the tooth mold to be operated is located on the dowel pin. Therefore, precise work was required.

  On the other hand, when adjusting the occlusion state of a dental prosthesis using a dental technician removable model composed of an impression model and a base, a holder called an articulator is used. The articulator is an instrument that holds the impression model on the upper jaw side and the impression model on the lower jaw side, and reproduces the patient's occlusion in the laboratory.

  Usually, a dental laboratory that has received a request to create a prosthesis from a dentist takes an impression model from the dentist, sets the impression model in an articulator, and manufactures the prosthesis. The prosthesis is delivered to the dentist along with the impression model. At this time, an articulator that reproduces the occlusal state is inevitably delivered to the dentist. The dentist makes final adjustments to the prosthesis using the impression model set in the articulator, and returns the articulator to the dental laboratory after the technical work is completed.

As described above, since the articulator is occupied for each case for a long time, it is necessary for the dental laboratory to have an articulator more than necessary. In the case of a local prosthesis such as a crown or an inlay, the dental laboratory may deliver it to the dentist with the articulator removed and use the articulator for other cases. In this case, when the prosthesis is delivered to the dentist, the occlusion-related information is lost, and the dentist cannot check and adjust the occlusal state.
JP 2004-305428 A

  The problem to be solved by the present invention is a forming tray for creating a base of a removable model for a dental technician used when creating a dental prosthesis such as a crown bridge denture or a cast crown restoration, It is to provide a base-molded tray that can create a split-and-removable model with high performance by simple work. Another object of the present invention is to provide a base molding tray that can use a common articulator of the same size for the production of a prosthesis and create a removable model that does not monopolize the articulator in the prosthesis.

  In order to solve the above problems, a removable mold base molding tray for a dental prosthesis according to the present invention is a removable mold base molding tray for a dental prosthesis for creating a working model for dental work. It is equipped with a table mold tray and positioning pins, and two or more holes with the same shape as the cross-sectional shape of the positioning pins are distributed on the side surface of the base mold tray in the dentition direction, and the positioning pins are inserted into the holes. In this case, the inner wall of the base mold tray is sealed, and the positioning pin is supported by the hole and is always fixed in the same posture.

  When creating a removable model for a dental prosthesis using a base molding tray for a removable model for a dental prosthesis according to the present invention, it is filled with gypsum mud with positioning pins inserted into all holes, and an impression model is formed on the top. To set the gypsum. After the plaster is completely solidified, all the positioning pins are removed and the plaster block is taken out to obtain a removable model for a dental prosthesis in which the impression model and the base are integrated.

  In the removable model created by the base molding tray of the removable model of the dental prosthesis of the present invention, the tooth shape of the abutment tooth to be worked is cut out with the dental technology saw together with the base, and the tooth of the adjacent tooth The prosthesis is created by separating it from the mold. When checking the contact status with adjacent teeth during the operation, the abutment tooth mold is rearranged in the base forming tray together with the adjacent tooth mold to restore the position information.

A positioning hole formed by a positioning pin is opened on the side surface of the base created using the base molding tray. If a positioning pin is inserted into this positioning hole through a hole provided on the side surface of the base mold tray, the positioning pin and the positioning hole are engaged, and the position and posture of each of the divided tooth molds can be determined at the time of making the removable model. Strictly regulate the condition. Therefore, the positional relationship at the time of creating the removable model can be accurately restored by returning the divided tooth mold into the base forming tray and inserting the positioning pin.
Therefore, according to the removable model created with the base molding tray of the removable model for dental prosthesis of the present invention, the positional relationship between the abutment tooth and the adjacent tooth is maintained, and the shape in the patient's oral cavity is accurately reproduced. So that a high-quality prosthesis can be created. Further, since it is not necessary to plant dowel pins or to flatten the bottom of the impression model, it is possible to easily create a split removable model even in a continuous tooth or a built body having a long post.

The cross section of the positioning pin may be any shape such as a circle, a shape obtained by cutting a part of the circle, an ellipse, a square, a rectangle, a rhombus, and a trapezoid. However, if the cross section is a perfect circle, the posture may not be regulated when there is only one positioning hole in the divided tooth mold, so the pin cross section has a shape in which a part of the circle is cut out, a square, etc. A shape other than a circle is preferred.
When cutting out the abutment tooth from the adjacent tooth mold, it is necessary to insert a saw so that the cut out base includes at least one positioning hole.

  The base molding tray of the removable model for a dental prosthesis of the present invention may be provided with holes for inserting positioning pins on both side surfaces of the base mold tray, or may be arranged only on one side surface. . For example, when the present invention is applied to a base forming tray for creating a removable model for all jaws, it is convenient to provide a hole only on the side surface on the cheek side where a large work space can be taken.

  The positioning pin provided in the base molding tray of the removable model for dental prosthesis of the present invention preferably has a length that does not reach the opposite side surface of the base mold tray when inserted into the hole. When the positioning pin is inserted into the base molding tray, it may be provided so that the positioning pin penetrates the tray and protrudes from the opposite side surface. If the positioning hole penetrates through the base when cutting thinly, the strength of the base may not be secured and the base may be damaged. Accordingly, it is preferable that the positioning pin has a length that reaches, for example, about 1/3 from the center of the base molding tray or the insertion side wall. In this case, since the plaster is enriched in the portion where the positioning pin does not reach, the reduction in the base strength can be reduced.

  A tapered taper may be provided at least at the tip of the positioning pin. If the diameters of the tip of the positioning pin and the opening of the positioning hole are equal, the tip of the positioning pin may scrape the opening peripheral edge of the positioning hole when the positioning pin is inserted into the positioning hole opened in the base. If the opening of the positioning hole is scraped off, dust may accumulate in the deep part of the positioning hole and the positioning pin may not be inserted normally. Therefore, it is preferable to provide a tapered taper at the tip of the positioning pin as a guide so that the positioning pin can be inserted without contacting the periphery of the opening of the positioning hole.

  Further, a taper may be provided on the shaft portion of the positioning pin in order to facilitate insertion of the positioning pin. In this case, a taper that matches the positioning pin may be provided in the hole of the base mold tray.

  The positioning pin provided in the present invention may be one in which the heads of two or more positioning pins are connected. By connecting the heads of a plurality of positioning pins, it is possible to reduce time and labor when inserting and removing the positioning pins. In addition, even when the removable model is outside the base mold tray, if the connected positioning pin is inserted into the base, the removable model can be handled as a single unit, so a rough engineering that does not require strict accuracy. Work can be performed and loss of the divided dental block can be prevented.

  Further, in the removable mold base molding tray for the dental prosthesis of the present invention, when it is inserted into the hole, the tip is in a surface position with the inner wall surface of the base mold tray or slightly protrudes from the inner wall surface. A dummy pin having a length of may be provided. When a dummy pin is inserted into a part of the hole of the base forming tray and the plaster is filled, no positioning hole is formed in the base at the position where the dummy pin is inserted. Therefore, if a dummy pin is inserted into a part that is away from the work target tooth and does not require a positioning pin to create a base, labor for filling gypsum and inserting / removing the pin can be omitted.

  If the dummy pins have a length that slightly protrudes from the inner wall surface of the base mold tray, it is possible to prevent the base from floating from the base mold tray when the gypsum is solidified.

  It is preferable that the holes provided in the base mold tray are arranged in a plurality of stages in the tooth axis direction so that adjacent holes partially overlap in the tooth axis direction. In this case, the design is easy if the cross-section of the positioning pin and the hole is long. In order to accurately position the abutment tooth on the base mold tray, when the abutment tooth is cut out from the removable model, the base must be cut out so that at least one positioning hole is included on the abutment tooth side. I must. If the hole ends are arranged so that they overlap, the base will always contain a hole or part of the hole, regardless of the cutting line, so precise work will be required when cutting the abutment tooth. This is very convenient because it becomes unnecessary and the degree of freedom of the cut line increases. In addition, as long as the edge part of an adjacent hole is adjoining enough, it does not necessarily need to overlap in a tooth-axis direction.

  If the base mold tray is provided with a taper having a wider opening than the bottom, the base can be easily removed and inserted. The base mold tray may be formed of an easily deformable material such as polypropylene. However, if the base mold tray is formed of a hard material such as light metal or ABS resin, the shape of the base can be stabilized. When formed with a hard material, if the inner surface is covered with an elastic material such as silicon rubber or synthetic rubber, the base can be easily removed without applying a release agent to the inner surface, and the base is reinserted. This is very effective because the gypsum is not scraped off.

  Moreover, you may provide the guide which controls the movement of the divided model in the dentition direction on the inner wall of the base. The guide is a groove or protrusion extending in the tooth axis direction, and a plurality of guides are provided in parallel. When a guide is provided on the inner wall surface of the base mold tray, it becomes a guide for the position when the divided tooth block is rearranged in the base mold tray, and the positioning pins can be easily inserted. In addition, since the approximate positional relationship between the tooth-type blocks can be maintained without inserting the positioning pins, it is possible to perform a general dental technical work without inserting the positioning pins. When fine adjustment is finally made regarding the contact state and the occlusal state with adjacent teeth, a positioning pin may be inserted to perform the work.

  In the removable mold base molding tray for dental prosthesis of the present invention, the base mold tray and positioning pins can be shared for a plurality of cases. When it is necessary to perform the technical work of another case while performing the technical work of one case using the removable model created by the base molding tray of the present invention, the removable model during the work Can be removed from the base mold tray and stored separately, and a new removable model can be created using the base mold tray.

  To complete or suspend the engineering work using the new removable model and resume the work that has been done so far, remove the new removable model from the base mold tray, release the base mold tray, The removable model stored separately can be set on the base mold tray again and the operation can be resumed. Even in this case, since the positional relationship of the impression model is strictly guaranteed by the positioning pin, the previous work can be resumed without losing the position information.

  Furthermore, the removable mold base molding tray for dental prosthesis of the present invention is very useful when the base mold tray is fixed to a conventional articulator and provided as a unit. If the base mold tray is fixed to the articulator and removable models of a plurality of cases are created and shared by the base mold tray, the articulator is not occupied for each case. Also, if the dental laboratory and dentist have an articulator with a fixed base mold tray of the same standard, for example, the prosthesis created at the dental laboratory is delivered to the dentist with the removable model attached to the removable model. At that time, only the removable model removed from the articulator can be delivered.

  Even if only the removable model is accepted, the dentist attaches the removable model to the articulator owned by the dentist himself and inserts the positioning pin. The positional relationship with the teeth can be restored, and the delivery can be inspected and fine-tuned. Therefore, the use of the removable mold base tray for the dental prosthesis of the present invention eliminates the need for the dental laboratory to deliver the removable model together with the articulator to the dentist. The number of vessels can be reduced.

  As described above, according to the removable mold base molding tray for dental prosthesis of the present invention, it is possible to provide a base molding tray capable of creating a removable model with high position reproducibility by a simple operation. In addition, a removable model that does not occupy the articulator can be created even during the production of the prosthesis.

  Hereinafter, the best mode of a base forming tray of a removable model for a dental prosthesis according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view for explaining a base forming tray of a removable model for a dental prosthesis according to a first embodiment of the present invention. The base molding tray 1 is shown below, and the removable model 2 created by the base molding tray 1 is shown above.
The base molding tray 1 includes a base mold tray 3 and positioning pins 4.
The inner wall of the base mold tray 3 has an inclination that becomes narrower toward the bottom, so that the removable model 2 formed in the base mold tray 3 can be easily taken out. Holes 5 having the same shape as the cross-sectional shape of the positioning pins 4 are arranged in the dentition direction on the side surface of the base mold tray 3, and the positioning pins 4 can be inserted into the holes 5.

The positioning pin 4 is provided with a tapered taper, and the tip thereof reaches about 1/3 of the lumen of the base mold tray 3. Further, the hole 5 may be provided with a nozzle or a ridge in order to increase the contact area with the positioning pin 4 and improve the gripping property.
Further, a guide 6 extending in the tooth axis direction protrudes from the inner wall surface of the base mold tray 3. The lower end of the guide 6 is in smooth contact with the inner wall surface of the base mold tray 3 so as not to be stepped. Alternatively, the guide 6 may be formed so as to reach the bottom. Further, the guide 6 may be formed as a recessed groove instead of a convex shape.

  When creating the removable model 2 with the base molding tray 1, the base mold tray 3 with the positioning pins 4 inserted is filled with gypsum mud so that no air bubbles enter, and the upper surface of the gypsum mud is filled with the patient's top surface. Place impression teeth collected from the oral cavity to solidify gypsum mud. After the gypsum mud is completely solidified, the detachable model 2 is obtained by removing the positioning pin 4 from the hole 5 and extracting the gypsum lump upward.

  The removable model 2 has a base 7 in the lower part and an impression tooth profile 8 in the upper part, and a positioning hole 9 in the side surface. The positioning hole 9 is formed by the positioning pin 4, and the shape of the positioning hole 9 matches the outer shape of the positioning pin 4. A guide slit 10 is carved by a guide 6 on the upper side of the removable model 2.

  The removable model 2 formed by the base molding tray 1 of the present embodiment is obtained by cutting out the tooth mold of the abutment tooth, which is a work object of the prosthesis, with a dental technician saw and the abutment tooth mold 11 and the adjacent tooth mold 12. And only the abutment tooth mold 11 is taken out to perform dental work. During the technical work, when inspecting the contact state between the prosthesis built on the abutment tooth mold 11 and the adjacent tooth mold 12, the abutment tooth mold 11 and the adjacent tooth mold 12 are guided by the guide 6 and the guide slit 10 as a guide. Returning to the base mold tray 3, the positioning pin 4 is inserted into the positioning hole 9 from the outside of the hole 5 to fix the abutment tooth mold 11 and the adjacent tooth mold 12 respectively.

  The abutment tooth mold 11 and the adjacent tooth mold 12 are completely restricted by the positioning pins 4 to the positions at the time of casting. Therefore, the positional relationship between the abutment tooth mold 11 and the adjacent tooth mold 12 is completely coincident with the positional relation on the impression model before the division, and the state in the oral cavity of the patient is accurately reproduced. Therefore, if the base molding tray 1 of the present embodiment is used, a removable model that accurately reflects the positional relationship between the abutment tooth mold 11 and the adjacent tooth mold 12 can be provided, and a high-quality prosthesis is created. can do.

  In addition, the base molding tray 1 of the present embodiment is very simple to operate because the positional relationship between the abutment tooth mold 11 and the adjacent tooth mold 12 can be restored simply by inserting the positioning pins 4. Furthermore, since the base mold tray 3 is provided with the guide 6, the positions of the positioning hole 9 and the hole 5 are adjusted strictly when the abutment tooth mold 11 and the adjacent tooth mold 12 are inserted into the base mold tray 3. Even if it is not, since the abutment tooth mold 11 and the adjacent tooth mold 12 are inserted at accurate positions, the positioning pin 4 can be inserted smoothly and handling is very easy. Since the approximate positional relationship is maintained by the guide 6 and the guide slit 10, technical work such as rough wax-up and contact adjustment can be performed without inserting the positioning pin 4.

  Further, for example, when there are a sufficient number of positioning holes 5 in the adjacent tooth mold 12, the positioning pins 4 may not be inserted into some of the positioning holes 5. That is, if at least one position is inserted for each of the divided tooth molds, the position is sufficiently restricted. Therefore, the positioning pins 4 are inserted into all the positioning holes 9 of the abutment tooth mold 11 and the adjacent tooth mold 12. There is no need to insert.

  Further, a dummy pin having the same cross-sectional shape as that of the positioning pin 4 and having a length at which the front end portion of the positioning pin 4 and the inner wall surface of the base mold tray 3 are positioned when inserted into the hole 5 may be provided. Since the tip of the dummy pin does not protrude from the inner wall surface of the base mold tray 3, if the dummy pin is inserted into the hole 5 and filled with gypsum mud, the positioning hole 9 is not formed at the place where the dummy pin is inserted. Therefore, if it is known in advance that a large number of positioning holes 9 are formed in one tooth block, the positioning pins 4 other than the required number are replaced with dummy pins so that the positioning holes 9 are not formed. The number of insertion of the positioning pins 4 can be reduced, and the labor of insertion can be reduced.

  When the removable model 2 created by the base molding tray 1 of the present embodiment is divided into the abutment tooth mold 11 and the adjacent tooth mold 12, a dental technician saw is inserted through the gap between the abutment tooth and the adjacent tooth mold. The model 8 is cut and cut together with the base 7. At this time, the base of the abutment tooth mold 11 is cut out so as to include at least one positioning hole 9.

  When the removable model 2 is divided, if the cutting line of the abutment tooth mold 11 is cut out so as to narrow downward, only the abutment tooth mold 11 is taken out without removing the adjacent tooth mold 12 from the base mold tray 3. be able to. However, when there is no sufficient gap between the abutment tooth and the adjacent tooth and it cannot be cut out with a free cutting line, the base of the abutment tooth mold 11 may be widened. In this case, if the adjacent tooth mold 12 is first removed from the base mold tray 3, the abutment tooth mold 11 can be removed. Even if the abutment tooth mold 11 and the adjacent tooth mold 12 are taken out separately, they can be accurately returned to the base mold tray 3 by the positioning pins 4, so there is no problem.

  Moreover, in the removable model 2 created with the base molding tray 1 of the present embodiment, the positional relationship of the impression model can be maintained even if the base part of the abutment tooth mold 11 and the base part of the adjacent tooth mold 12 do not adhere to each other. Since it can be restored by the positioning pin 4, as shown in FIG. 1, for example, the base portion of the abutment tooth mold 11 is cut out with a cutting line extending from the bottom, and after the abutment tooth mold 11 is taken out, The base portion may be cut again so as to narrow.

  On the other hand, the standard of the base molding tray 1 of the present embodiment may be unified, and the dental technician and the dentist may have the base molding tray 1 of the same standard. In this case, when the prosthesis is delivered together with the removable model 2 from the dental technician to the dentist, only the removable model 2 removed from the base molding tray 1 needs to be delivered. The dentist installs the delivered removable model 2 on the base molding tray 1 that he owns, and inserts the positioning pin 4 so that the position information is the same as the state in which the dental technician was working. Can be restored, and inspection and fine adjustment of the contact state and occlusal state of the prosthesis can be performed. Therefore, it is not necessary for the dental technician to have a large number of base molding trays 1, which is very economical.

  If the standard of the base molding tray 1 is unified, the base 7 is cut out from the removable model 2 that has been used and stored, and the base 7 is reused by connecting a new impression model with plaster. The amount of gypsum used can be reduced.

FIG. 2 shows a perspective view of a base forming tray of a removable model for a dental prosthesis according to a second embodiment of the present invention. Also in FIG. 2, the base molding tray 1 is shown below and the removable model 2 is shown upward like FIG.
In the base mold tray 3 of the present embodiment, horizontally long holes 5 are provided in the upper and lower stages in the tooth axis direction, and positioning pins 4 are inserted into the respective holes 5. The positioning pins 4 on each of the upper and lower stages are connected to each other by one connector 20 and are integrated into a connecting pin 21. For the sake of explanation, the front half of the connector 20 is notched.
Also, a hook-shaped retainer 22 is arranged on the side surface near the bottom surface of the base mold tray 3, and when the base mold tray 3 is connected to the articulator using gypsum, the plaster is placed on the holder 22. By laying up, it can be joined firmly.

  In the base molding tray 1 of the present embodiment, each hole 5 is arranged so as to partially overlap the adjacent hole 5 in the tooth axis direction. Even if divided along the cutting line, the positioning hole 9 is always included in the base of the abutment tooth mold 11. Therefore, in the base forming tray 1 of the present embodiment, when the removable model 2 is divided, the cutting line can be freely set regardless of the position of the hole 5, and the work of dividing the removable model 2 is extremely difficult. It is simple. Moreover, even a technician who is not skilled in dental technology can easily perform the division work.

Further, in the base molding tray 1 of this embodiment, since the positioning pins 4 are connected by the connector 20 to form the connecting pins 21, all the positioning pins 4 can be inserted and removed with one action. Is very easy to handle.
Further, even when the removable model 2 is taken out from the base mold tray 3, if the connecting pin 21 is inserted into the abutment tooth mold 11 and the adjacent tooth mold 12 which are separated from each other, the removable model is replaced with the base mold tray. Even in the state extracted from 3, the abutment tooth mold 11 and the adjacent tooth mold 12 can be stored in a coupled state without leaving. Further, since the connecting pin 21 maintains the positional relationship between the abutment tooth mold 11 and the adjacent tooth mold 12 to some extent, it is possible to perform a rough dental technique work and is very convenient.

  The positioning pins 4 do not have to be all connected by the connector 20. For example, the positioning pins 4 located at the lower part of the abutment tooth mold 11 are used as independent positioning pins 4, and adjacent tooth molds 12 on both sides of the abutment tooth mold 11. It is good also as the connecting pin 21 which connected the positioning pin 4 located in the lower part of each with the connector 20, respectively. Several types of connecting pins 21 having different numbers of positioning pins to be connected may be prepared and used depending on the situation.

  The base mold tray 3 of the present embodiment is made of a light metal for the outer wall 23 and silicon rubber for the inner wall surface 24. Since the outer wall 23 is formed of a hard light metal, the base mold tray 3 is not deformed when the removable model 2 is cast, and it is also strong when the removable model 2 is locked with the positioning pins 4. Can be fixed. Since the inner wall surface 24 is formed of silicon rubber, it can be easily extracted from the base mold tray 3 after the gypsum is solidified. Further, when the removable model 2 is inserted into the base mold tray 3, the removable model 2 is not scraped off and damaged.

FIG. 3 is a top view of the base jaw forming tray for the entire jaw according to the third embodiment observed from above. This embodiment is an example of a base molding tray 1 provided for the entire jaw. Since the connecting pins 21 are arranged on the left and right molar parts and another connecting pin 21 is arranged on the front tooth part, a total of three connecting pins 21 are inserted from the front and side, and the bottom is occluded. A holder 22 for connecting to the vessel is connected.
When the connecting pins 21 are used in the all-chin base forming tray 1, even if the positioning pins 4 are in the same direction, if all the positioning pins 4 are connected, it becomes difficult to insert and remove, and the positioning holes are not provided. Since there is a possibility that the strength of the base is lowered along the side surface of the base, the connecting pins 21 are divided into several groups, and the connecting pins 21 are inserted almost at right angles to the base. Although three connecting pins 21 are used in the figure, the number of connecting pins 21 may be changed according to the characteristics of the subject case. For example, when a canine or its vicinity becomes an abutment tooth, a connecting pin may be inserted near the canine.

  As shown in FIG. 4, a base molding tray for the entire jaw may be provided integrally with the articulator. In addition, you may provide the base molding tray for single jaws or anterior teeth integrally with an articulator. In FIG. 4, the base jaw forming tray 1 for the entire jaw is fixed to the mounting rings 41 of the upper jaw and the lower jaw of the articulator 40. In the articulator of the present embodiment, the removable model 2 is created by the base molding tray 1 mounted on the upper jaw and the lower jaw, and the removable model 2 is taken out to perform the technical work. During the operation, when the occlusal state is confirmed, the removable model 2 is installed in the articulator 40 and fixed by the connecting pin 21 to confirm the occlusion of the upper jaw and the lower jaw. FIG. 4 shows a state in which the model is not yet attached to the upper jaw mounting ring 41.

  According to the base molding tray 1 of the present embodiment, the articulator is released from the removable model 2 while the removable model 2 is removed and the technical work is being performed. You can create a removable model. Also, when delivering a prosthesis that has been completed to the dentist, if the dentist owns a similar articulator, the dental laboratory must not deliver the removable model 2 together with the articulator. In addition, the dentist can restore the occlusal state with a self-owned articulator. Therefore, the number of articulators owned by the dental laboratory can be greatly reduced, which is very economical.

  As explained in detail above, if the base molding tray of the removable model for dental prosthesis of this embodiment is used, a removable model that can accurately and easily reproduce the positional relationship with adjacent teeth and counter teeth is a simple operation. Can be created. In addition, a removable model that does not occupy the articulator can be created even during the production of the prosthesis.

It is a perspective view showing the base shaping | molding tray of the removable model for dental prostheses in 1st Example of this invention. It is a perspective view showing the base molding tray of the removable model for dental prostheses in 2nd Example of this invention. It is a top view which shows an example of the base molding tray of the removable model for dental prostheses concerning the 3rd Example of this invention provided for all jaws. It is a conceptual diagram which shows the articulator which fixed the base molding tray of the removable model for dental prostheses provided for all jaws. It is a perspective view of the shaping | molding die of the base of the conventional dental work model.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base molding tray 2 Removable model 3 Base mold tray 4 Positioning pin 5 Hole 6 Guide 7 Base 8 Impression model 9 Positioning hole 10 Guide slit 11 Abutment tooth type 12 Adjacent tooth type 20 Connector 21 Connecting pin 22 Holding Tool 23 Outer wall 24 Inner wall 40 Articulator 41 Mounting ring

Claims (12)

A removable base for preparing a prosthesis for creating a working model for dental technician work, comprising a base mold tray and a positioning pin, and the positioning pin of the positioning mold on the outer wall of the side of the base mold tray Two or more holes having the same shape as the cross-sectional shape are distributed in the dentition direction and provided substantially perpendicularly to the side surface, and the base mold tray is inserted when the positioning pin is inserted into the hole. The inner wall is sealed and a positioning hole is formed in the side surface of the removable model for creating a prosthesis by casting. By inserting the positioning pin into the positioning hole of the removable model for creating a prosthesis through the hole having the positioning pin on the outer wall of the side surface of the base mold tray , It is fixed to restore the positional relationship Base creation tray prosthesis creation friendly 撤模 form characterized and.    The removable base for preparing a prosthesis according to claim 1, wherein the hole exists only on one side of the base mold tray.   The removable base for preparing a prosthesis according to claim 2, wherein the positioning pin has a length that does not reach the opposite side of the base mold tray when inserted into the hole. .   The removable base model tray for producing a prosthesis according to any one of claims 1 to 3, wherein at least a distal end portion of the positioning pin has a tapered taper.   5. The removable base for creating a prosthesis according to any one of claims 1 to 4, wherein two or more of the positioning pins are integrated by connecting their heads. tray.   6. The prosthesis making device according to claim 1, further comprising a dummy pin having a length such that, when inserted into the hole, a front end thereof is substantially in a surface position with an inner wall surface of the base mold tray. Removable model base creation tray.   The removable base for preparing a prosthesis according to any one of claims 1 to 6, wherein the adjacent holes are partially overlapped in the tooth axis direction.   The base of the removable model for making a prosthesis according to any one of claims 1 to 7, wherein an inner wall of the base mold tray has a taper in which an opening is wider than a bottom. Creation tray.   The removable base model for preparing a prosthesis according to any one of claims 1 to 8, wherein a guide is carved in an axial direction on an inner wall surface of the base mold tray.   The removable base model tray for preparing a prosthesis according to any one of claims 1 to 9, wherein the base mold tray is formed of a hard material.   The removable base model tray for creating a prosthesis according to claim 10, wherein an inner wall surface of the base mold tray is covered with an elastic material. 12. The removable base for preparing a prosthesis according to claim 1, wherein the base mold tray is integrated with an articulator.

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