WO2000054698A1 - Casting method for metal base denture, production method for casting mold used in casting method, and casting mold and metal base denture - Google Patents

Abstract

A metal base denture (1) having a mucous membrane-side surface (2) which is in contact with the mucous membrane of the patient's upper jaw and which has an uneven pattern (3) formed thereon. The surface (2) including the uneven pattern (3) has a smooth surface property not affected by the patient's mucous membrane tissue.

Description

Manufacturing method of metal denture, manufacturing method and manufacturing mold used therefor

Technical field

 The present invention relates generally to metal dentures, and more particularly, to a method of manufacturing the same. The present invention also relates to a method of manufacturing a metal mold denture mold and a mold formed by the method. The present invention further relates to a metal denture that can provide a stable wearing feeling when worn. Background art

Gold is a traditional material, T i alloy of platinum, C ₀ - CI: Among the transition of dental material to biocompatibility excellent metal such as an alloy, precision铸造method, already established and Los Towakkusu method Metal dentures using technology have been put into practical use (“Dental Technology Clinical Training Course 5”, pp. 121-162, published by Medical and Dental Medicine Publishing Co., Ltd.). The method of making this metal floor denture is, as a general rule, to prepare a positive model that is a model of the patient's upper jaw, and apply the shape (positive surface) of this positive model to the impression of plaster, agar, silicon, etc. The imprint material is transferred using the imprint material, and then the impression material after the transfer is used to make a mold.

 In the case of metals with high melting points, such as Ti alloys and Co-Cr alloys, it is empirical that bubbles and nests are likely to occur due to the rough surface of the molded surface of the mold. Is known to.

By the way, the structure, that is, the mucosal surface of the upper metal floor has fine irregularities that transfer the properties of the patient's mucosal tissue.For example, when the patient's mucosal tissue is rough, the structure is inevitable. Since the surface of the mold becomes a rough uneven surface, the surface of the upper jaw metal floor to be made is rougher due to the generation of air bubbles during the manufacturing. This includes the problem that it takes time and effort to finish polishing because it easily becomes skin.

 In view of such problems, the present inventor has filed a Japanese patent application specified in Japanese Patent Application No. 7-3115299 (this application was filed on June 17, 1997 , Published in Japanese Unexamined Patent Application Publication No. Hei 9-155550 in 1997), the positive surface of the positive model, that is, the shape surface, was used as an impression material (鎵). When sampling or transferring with a refractory model material in the proposal of the mold fabrication method), this positive surface is covered with a thin flexible thin film, and this flexible thin film is drawn using suction force. The idea was to inject the impression material after it was brought into close contact.

 According to this new method, the overall contour of the shape surface obtained by the impression material faithfully follows that of the positive model, but the surface texture reflects the smooth surface of the flexible thin film. However, it follows the surface properties of this flexible thin film. Therefore, the sculpture (fireproof model) made from the shape surface transferred by the impression material should have a smooth surface property due to the surface of the flexible thin film without being affected by the state of the mucosal tissue of the patient. Therefore, there is an advantage that the problem of bubbles and nests during manufacturing can be reduced, and the efficiency of finish polishing work can be improved and the incidence of defective products can be significantly reduced. Disclosure of the invention

 The inventor of the present invention has obtained excellent results by the above-described novel method, and has further studied the development of this method. As a result, the present inventors have devised the present invention.

 SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing a metal denture which can give a stable wearing feeling when worn.

Another object of the present invention is to provide a method of manufacturing a metal mold for producing a metal denture which can give a stable wearing feeling when worn. Another object of the present invention is to provide a structure for producing a metal denture which can give a stable wearing feeling when worn.

 Another object of the present invention is to provide a metal denture which can give a stable wearing feeling when worn.

 The metal denture of the present invention has a surface on the mucous membrane side in contact with the mucous membrane of the upper jaw of a patient, and a relatively large uneven pattern is formed on the mucosal surface.

 The metal denture or the mold for this metal denture is

 A series of steps of forming a mold from a positive model, which is a model of the patient's upper jaw, by setting a mold for forming the irregular pattern on the shape surface of the model having the surface shape of the patient's upper jaw; ,

 A step of covering the model provided with the pattern of the concavo-convex pattern with a flexible thin film,

 Bringing the flexible thin film into close contact with the model,

 Pouring a transfer material onto the flexible thin film that is in close contact with the model and solidifying it.

 The above-mentioned model having the upper jaw surface shape of the patient is typically an explicit model which is a model of the upper jaw of the patient. The transfer material may be a conventionally known impression material made of gypsum, agar, silicon, or the like, but is preferably gypsum.

The pattern of the concavo-convex pattern can be produced, for example, by cutting a commercially available net material into an appropriate size and bonding the cut material to the shape surface of the model. As another example, the pattern of the concavo-convex pattern may be formed by applying wax to the shape surface of the model. As another example, the type of uneven pattern is Yo Le be performed by adhering a plurality of thin strips on the shaped surface of the model, ₃

Other features and objects of the present invention will become apparent from the following description of preferred embodiments of the present invention. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a perspective view of an example of a metal denture according to the present invention.

 FIG. 2 is a perspective view of another example of the metal denture according to the present invention.

 FIG. 3 is an explanatory diagram of a process of making an impression model from a positive model to make a metal denture according to the present invention.

 FIG. 4 is an explanatory diagram showing an example of a specific method of forming a mold on the shape surface of the positive model in order to form a concavo-convex pattern on the mucosal surface of the metal denture according to the present invention. FIG. 5 is an explanatory view showing another example of a specific method for forming a mold on the shape surface of the positive model in order to form an uneven pattern on the mucosal side surface of the metal denture according to the present invention. FIG. 6 is an explanatory view showing another example of a specific method of forming a mold on the shape surface of the positive model in order to form a concavo-convex pattern on the mucosal side surface of the metal denture according to the present invention. FIG. 7 is a schematic sectional view of an apparatus suitable for producing a negative model for producing a metal denture according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

 1 and 2 illustrate a metal denture according to the present invention. The metal denture 1 is not particularly limited, but it is preferable to select a metal having excellent biocompatibility, such as a Ti alloy or a Co—Cr alloy. The metal denture 1 has a surface 2 on the mucous membrane side in contact with the mucous membrane (not shown) of the upper jaw, and an uneven pattern 3 is formed on the mucosal surface 2. The surface 2 including the concavo-convex pattern 3 has a smooth surface texture without fine irregularities to which the mucosal tissue of the patient is transferred.

The concavo-convex pattern 3 may be formed by a plurality of circular recesses 4 separated from each other as shown in FIG. 1 or may be formed by a continuous groove 5 extending in a net shape as shown in FIG. May be combined. Such concavo-convex pattern 3 may be arranged on almost the entire area of the surface 2 of the metal denture, may be arranged only on one side area, or may be formed only on the local area. In any case, the shape of the recesses 4 and 5 for forming the concavo-convex pattern 3 and the shape of the land 6 formed thereby are not particularly limited. Unlike the fine irregularities that transfer the mucosal tissue, the recesses 4 and 5 have a size and depth that can be seen at a glance. All of the elements that characterize the concavo-convex pattern 3, such as the arrangement position of the concavo-convex pattern 3 and the shapes and sizes of the recesses 4 and 5, may be determined according to the needs of the patient, if necessary.

 A typical method of making the metal denture 1 according to the present invention is basically based on a positive model, which is a model of a patient's upper jaw, according to a conventionally known precision metal manufacturing method. This mold is used to make a sculpture by transferring the shape surface (positive surface). To collect the shape surface of the positive model, it is necessary to use a conventionally known impression material such as gypsum, agar, or silicon. it can.

 The method of manufacturing the metal denture 1 according to the present invention is characterized by a step of transferring the surface shape, such as a step of taking the shape of the positive model using an impression material or a step of making a mold from the impression material. In this example, a description will be given based on a typical method of making a metal denture, and illustrates a case where a method according to the present invention is added to a step of collecting the surface shape of a positive model using an impression material. It is. As long as this typical method of manufacturing a metal denture is followed, the method according to the present invention can be added to the step of collecting the surface shape of the positive model using an impression material. This is preferred because the sulcus is adapted to the upper jaw of the patient.

 FIG. 3 is an explanatory diagram of a process of collecting the shape surface of the positive model using an impression material.

First, a positive model 10 corresponding to the patient's upper jaw is prepared (procedure: a), and a concave / convex pattern 3 mold 11 is provided on the surface 10a of the positive model 10 (procedure: mouth). ). The pattern 11 of the uneven pattern 3 will be described later. Next, the shape surface 11a of the positive model 10 provided with the concavo-convex pattern 11 is covered with a flexible thin film 12 (procedure: C). A vacuum is applied between the mold 10 and the two 10 and 12 are brought into close contact (procedure: 2). In this way, the flexible thin film 1 After setting to 0, pour impression material 13 onto it and transfer it (Procedure: E). The impression model, ie, the negative type model, made through the procedure of (i) to (e) is used to make a fireproof model which is a structure type of a metal denture. Since a method known in the art can be used for making the refractory model, its description is omitted.

 The mold 11 of the concavo-convex pattern 3 will be described with reference to FIGS. 4 to 6 .As shown in FIG. 4, as the mold 11, for example, a vinyl tape coated with an adhesive on one side is cut into a circle to form By making a circular thin piece 15 of this shape, and attaching this circular piece 16 to the shape surface 10a of the positive model 10 at an appropriate distance, the uneven pattern shown in Fig. 4) A mold for making 1 can be made. As shown in Fig. 5, a net 16 made by cutting a commercially available net made of synthetic resin fibers into an appropriate shape was prepared, and this net 16 was used as the surface 1 of the positive model 10. By adhering to 0a, it is possible to make a mold 11 for forming a concavo-convex pattern (a continuous groove 5 extending in a net shape) as shown in FIG. In addition, as shown in FIG. 6, wax 17 may be applied to the shape surface 10a of the positive model 10 to form a mold 11 having an appropriate shape. As can be understood from the above example, the pattern 11 of the concave-convex pattern 3 can be formed by a suitable raised portion artificially and intentionally provided on the shape surface 10a of the positive model 10.

 As can be understood from the arrangement position of the mold 11 as described above in the description of the uneven pattern 3, the mold 11 may be arranged in almost the entire area of the shape surface 10 a of the positive model, It may be arranged only in the local area, or may be arranged only in the local area. Also, a net 16 may be arranged in a partial area of the shape surface 10a, and a wax 11 may be applied to another area, for example, to form the mold 11.

When the mold 11 is made using the net 16, the size of the land portion 6 of the uneven pattern 3 formed on the surface 2 of the metal denture is determined by the size of the mesh of the net 16. However, when a relatively small mesh net 16 is employed, the land 6 actually has a slightly tapered projection shape. In order to carry out the above-mentioned procedure (e) (Fig. 3) for collecting the shape surface of the positive model with the impression material, a patent application that has already been published (Japanese Patent Application No. 7-311592: The device proposed by the present invention in Kaihei 9 155 5 0 5) is optimal, so the disclosure of this patent application is incorporated herein, but the outline of this device is described below with reference to FIG. I do.

 As shown in FIG. 7, the device 20 has a container 21 opened upward. In this container 21, there are provided a ventilation partition plate 22 and a number of small-diameter particles 23 placed on the plate 22, and at the bottom of the container 21, A port 24 is formed to communicate with a vacuum source (not shown) such as a vacuum pump. To make an impression model using this apparatus 20, the following operation may be performed.

 (1) Place the positive model 10 with the irregular pattern 11 on the small-diameter particles 23 (The illustration of the mold 11 is omitted to prevent the solid line drawn in Fig. 7 from being complicated). ).

 (2) A flexible thin film 12 covers the positive model 10 and small particles 23 around it.

 (3) A ring member 25 is set on the outer peripheral portion of the flexible thin film 12, and the flexible thin film 12 is fixed between the ring member 25 and the container 21.

 (4) A vacuum is drawn through the port 24 to evacuate the air between the flexible thin film 12 and the positive model 10, and the flexible thin film 12 is brought into close contact with the positive model 10.

 (5) An impression material 13 such as gypsum / silicone is poured onto the flexible thin film 12.

 (6) When the impression material 13 is solidified, remove it from the device 20.

 The metal denture 1 according to the present invention has an overall shape adapted to the upper jaw of the patient, but its mucosal surface 2 is affected by the condition of the mucosal tissue of the patient. In addition, the flexible thin film 1 2 provides a smooth surface texture, which can reduce the problems of bubbles and nests during fabrication, improve the work efficiency of finish polishing work, and reduce the incidence of defective products. Significant reductions can be achieved.

The uneven surface 3 formed on the mucosal surface 2 of the metal denture 1 Since the substantial surface area of the denture is increased, the contact area with the patient's maxillary mucosa can be increased when the patient wears the metal denture 1, for example, stable mounting of the metal denture 1 It can give the patient a feeling of sensation and, when eating something, can give the appropriate stimulation to the mucous membrane of the maxilla. In order to make this irritation to the mucous membrane particularly intentional, the land portion 6 formed by the uneven pattern 3 is preferably formed into a slightly tapered projection shape.

 As a result of actually making a metal denture 1 and conducting a clinical test, the patient's voice was `` stable wearing '' and `` irritation of saliva became active because the mucous membrane was stimulated by the uneven pattern 3 '' I got a favorable response.

 The preferred embodiment of the present invention has been described above. However, the present invention is not limited to this embodiment, and includes, for example, the following modified examples.

 (1) When fabricating a metal denture according to a typical method of manufacturing a metal denture, during the process of making a refractory model (铸 molding) from an impression model, the impression model should be provided with a three-dimensional pattern 3 1 1 on the impression model. You may.

 (2) The present invention is applied to the present invention from a metal mold by adopting the mold method described in Japanese Patent Application No. 7-315215 (Japanese Patent Application Laid-Open No. Hei 9-55505) described above. If a metal denture according to (1) is to be made, in the process of making a metal mold from the positive model, the pattern 11 of the uneven pattern 3 may be provided on the model from which the surface shape is to be transferred. Industrial applicability

 As described above, the metal denture according to the present invention has an overall shape conforming to the upper jaw of the patient, but the mucosal surface thereof is different from the state of the mucosal tissue of the patient. Since the flexible thin film provides a smooth surface without being affected, the problem of bubbles and nests during manufacturing can be reduced, improving the work efficiency of finish polishing and generating defective products. A significant reduction in the rate can be achieved.

Claims

The scope of the claims 1. A method of manufacturing a metal denture with an uneven pattern on the mucous membrane side,  A series of steps of forming a mold from a positive model, which is a model of the patient's upper jaw, by setting a mold for forming the irregular pattern on the shape surface of the model having the surface shape of the patient's upper jaw; ,  A step of covering the model provided with the pattern of the concavo-convex pattern with a flexible thin film,  Bringing the flexible thin film into close contact with the model,  Casting a material for transfer onto the flexible thin film in close contact with the model and solidifying the material, thereby producing a metal denture.  2. The method according to claim 1, wherein the model having the surface shape of the upper jaw of the patient is the positive model.  3. The method according to claim 1, wherein the material for transfer is an impression material selected from the group consisting of gypsum, agar, and silicon. 4. The method according to claim 2, wherein the transfer material is gypsum. 5. The method according to any one of claims 1 to 4, wherein the pattern of the concavo-convex pattern is made of a net material.  6. A step of providing a mold for forming the concavo-convex pattern on the shape surface of the model having the surface shape of the upper jaw of the patient is performed by applying a box to the shape surface of the model. The manufacturing method according to any one of claims 1 to 4.  7. The step of providing a mold for forming the concavo-convex pattern on the shape surface of the model having the upper jaw surface shape of the patient is performed by bonding a plurality of thin pieces to the shape surface of the model. The manufacturing method according to any one of claims 1 to 4, wherein 8. A method for producing a metal mold denture having an uneven pattern on the mucous membrane side, wherein the mold is formed for a metal denture from a model positive model that is a model of a patient's upper jaw. In a series of processes, the irregularities are modeled on the surface of the model having the surface shape of the patient's upper jaw. Providing a similar mold,  A step of covering the model provided with the pattern of the concavo-convex pattern with a flexible thin film,  Bringing the flexible thin film into close contact with the model,  Casting a material for transfer onto the flexible thin film that is in close contact with the model and solidifying the material for transfer.  9. The manufacturing method according to claim 8, wherein the model having the upper jaw surface shape of the patient is the positive model.  10. The method according to claim 8, wherein the transfer material is an impression material selected from the group consisting of gypsum, agar, and silicon.  11. The method according to claim 9, wherein the material for transfer is gypsum. 12. The method according to any one of claims 8 to 11, wherein the pattern of the concavo-convex pattern is made of a net material.  13. A step of providing a mold for forming the concavo-convex pattern on the shape surface of the model having the surface shape of the upper jaw of the patient is performed by applying wax to the shape surface of the model. 21. The method according to any one of items 8 to 11 above.  14. The step of providing a mold for making the concavo-convex pattern on the shape surface of the model having the surface shape of the upper jaw of the patient is performed by bonding a plurality of thin pieces to the shape surface of the model. The manufacturing method according to any one of claims 8 to 11. 15. A metal denture made by the manufacturing method according to any one of claims 1 to 7.  16. A mold for a metal denture made by the method according to any one of claims 8 to 14.  17. A metal denture having a mucosal side surface in contact with the mucous membrane of the upper jaw of a patient, wherein a relatively large uneven pattern is formed on the mucosal surface.