KR100249670B1 - Method for manufacturing wax pattern for dental crown prosthesis - Google Patents

Abstract

The present invention relates to a method for manufacturing a wax pattern model, which is a material necessary for casting and repairing a prosthesis equally to an injured tooth in order to restore the full function of the injured tooth when the caries or teeth are damaged by trauma. The goal is to make it accurate and easy.

In the primary wax pattern model 5 according to the present invention, the base wax, the blue inlay wax, and the perfect wax are mixed in a predetermined ratio, and the composition wax is closer to the occlusal pattern of the final wax pattern model. It is formed by the molding apparatus to have a. The molding apparatus has a lower mold 1 on which the pattern grooves 13 are formed, and an upper mold 2 on which protrusions 23 are inserted to fit snugly into the pattern groove 13. The method of manufacturing the final wax pattern model (7) using the primary wax pattern model (5) is to cover the primary wax pattern model (5) on the damage value model (61), and then the first wax pattern model (5) How to repair the lacking part with the supplemental wax (51) or delete the excessive part, by placing the wax on the damage value model (61) to assist the correct positional criteria and occlusal adaptation of the primary wax pattern model (5) Forming a wax cone 52 and covering the primary wax pattern model 5 thereon, and then repairing the insufficient portion of the primary wax pattern model 5 with the supplemental wax 51 or deleting the excess portion. Various methods may be employed.

Description

Method for manufacturing wax pattern model for crown prosthesis {METHOD FOR MANUFACTURING WAX PATTERN FOR DENTAL CROWN PROSTHESIS}

The present invention relates to a method for manufacturing a dental prosthesis wax pattern model, which is a material required to cast a prosthesis in the same manner as a damaged tooth in order to recover the damaged tooth when a tooth or a tooth is damaged by a trauma.

In order to treat and repair dental caries or damaged teeth (hereinafter referred to as 'damage teeth', here, for example, the lower teeth (lower teeth) for example), the dentist generally goes through the following process.

① Flap (Delete) Process

In addition to treating the damaged teeth, after the treatment necessary for the production of the prosthesis, the damaged teeth are well trimmed and removed by carefully considering the gap for cementing the prosthesis to the damaged teeth. That is, the damage value is eliminated in consideration of the minimum manufacturing thickness and cementing thickness of the crown prosthesis, the retaining force of the crown prosthesis, and the cleanliness that can be functionally harmonized with the periodontal tissue. When deleting, it should be deleted to better understand the degree of damage, the occlusion and shape of the injury and the antagonist, the cusp height, the inclination angle, and the gap between the injury and the antagonist.

② Raising Process

Next, an impression material is used to make an impression body in negative form for the damaged and opposing teeth. For the injured teeth, a mandibular impression impression is made by covering the lower jaw with the injured material and the natural teeth adjacent to the injured teeth. Impression materials are applied to the maxilla to include natural teeth, creating a maxillary sound impression. As the impression material, various kinds of materials, such as silicone rubber, polysulfide rubber, agar and alginate, which are generally widely used, may be used.

③ Production Model

Using the negative impressions of the maxillary and mandibulars obtained through the impression process, a hard stone is used for each of the maxillary and mandibular working models ('working cast' or 'wax-up model'). A mandibular working model with a model of injury and a maxillary working model with a model of antagonist, respectively, and a maxillary and mandibular working model with bite registration wax or equivalent Fix the upper and lower occlusal relationship of the model.

As described above, the model for maxillary and mandibular operation completed with plaster is transported to the laboratory, and the laboratory uses the same to complete the manufacturing of the prosthesis, and sends the prosthesis to the dentist.

① Work process before manufacturing wax pattern model

First, the trimming work required for placing the dowel pin to be described later with respect to the lower part of the mandible working model is carried out, and then the dowel pin is placed. Then, the holding groove is placed on the base on which the mandible working model is placed. After forming, the damage model to be repaired by wax is separated from the model and prepared to perform the following wax-up process such as margin trimming with a trimming bur. The model for maxillary and mandibular operation is fixed by the occlusal relationship between the maxillary and mandible with wax or equivalent material that can accurately maintain the patient's uterus and the oral cavity. Next, the fixed occlusal maxillary and mandibular working model is mounted on the average value articulator for simple recovery (one crown), and for semi-regulatory or fully adjustable articulator for complex recovery, depending on the prosthetic restoration site or condition. Fix it.

② Wax-up process

This is the most important step in making the prosthesis accurate. In this process, the die hardener is first applied to the cervical margin in consideration of the gap compensation value when cementing the prosthesis to the damaged natural teeth, and a die spacer such as a manicure is placed 1 to 1.5 millimeters above the cervical margin. Apply, dry, and apply a separator thereon. Next, a wax is placed on it and processed to form a final wax pattern model for casting the prosthesis and separated from the damage model. The final wax pattern model should be well made in consideration of the damage value, the upper and lower occlusal relationship between the antagonist and the antagonistic teeth, chewing function, and patient comfort. That is, the ideal value of the damage value and the antagonistic and antagonistic adjacent values such as the contact between the damaged value, the height of the head against the antagonist and the antagonist, the depth of the fossa, the inclination angle and the marginal ridge head Elements that determine occlusion and chewing function must be accurately implemented in the wax pattern model. In other words, the occlusion pattern of the wax pattern model should be made into the health of the chewing organ, the physiological form of the teeth and the functional occlusion of the clam teeth.

The process for making such a wax pattern model is known in many ways, but the process is almost the same, and the production of accurate wax pattern model is mainly dependent on the experience and skill of the technician, so the most representative Some of the procedures used are described as examples.

The first method involves placing wax on the injured model and then engaging the model for maxillary and mandibular operation, replenishing the wax for the lack of wax, and slicing the excess for the wax. Forming the final wax pattern model by forming a.

In the second method, a wax sheet having a predetermined thickness is placed on a damaged tooth model to occlude the damaged tooth model and the antagonist model, and then the antagonist model is separated so that the wax sheet has a predetermined occlusal pattern. A wax wax is added to the upper surface of the formed wax sheet by the method described above to produce a final wax pattern model.

The third method is to create wax cones by raising wax to form a cusp on the injured model, and then repeatedly add wax to the injured model around the wax cones to create cusps, cusp angles, cusp ridges, cusps, and feet. It is a method of making a final wax pattern model by forming a back.

The fourth method is to complete the final wax pattern model using a primary wax pattern model having a simple occlusal pattern prepared in advance very close to the final wax pattern model. In this method, the primary wax pattern is covered on the damaged tooth model, and the wax and the inclination angle are formed by repeatedly adding wax to the upper surface of the primary wax pattern model, and then the wax is replenished on the bottom surface of the primary wax pattern model. Occlusal model for maxillary and mandibular operation is combined, and then the maxillary and mandibular operation model is released to create a final wax pattern model.

③ investment process

The final wax pattern model completed by the above methods is put into an electric heating furnace, for example, a semi-solid refractory investment agent (for low temperature, usually precious metal) such as gypsum or silicon-bonded investment agent (for high temperature, usually non-noble metal). ), It is cured and then slowly heated to a predetermined temperature to form a mold by burning the final wax pattern model.

④ Casting process

Prosthesis by placing the mold on the casting machine and casting the dental main alloys (noble and non-precious metals), ie gold, silver, palladium, platinum, other materials or optional molten metals thereof, using a centrifugal casting machine into the casting space of the mold. Make Next, the final prosthesis is completed through fitting and polishing.

⑤ prosthetic cementing process

Prostheses are completed by cementing and attaching the prosthesis prepared as described above to a damaged natural tooth.

In the prosthesis manufacturing process as described above, it is well known that a wax pattern model can be made in consideration of the following matters to make an accurate prosthesis.

First, the occlusion pattern should be implemented so as to disperse the stress as much as possible during occlusion between the injury value and the antagonist.

Second, for the most stable support in occlusion, as much bite as possible along the long axis of the tooth should be applied.

Third, when the face-to-face contact of the flat cusp during occlusion or chewing occurs, the stress increases due to a lot of force, so the cusp should be changed to point-to-face contact to minimize the stress during occlusal contact.

Fourth, the cusps of the maxillary and mandibular teeth meet with the cusps of the antagonist or the cusp slope or marginal ridge and contact with the maximum area to form the occlusion, ie central occlusion, when the mandible remains stable to the maxilla. The central occlusion will break and the teeth should not escape from the occlusion. At this time, the jaw joint has a stable position, the occlusion is stable and mastication muscles can be comfortable.

In view of the above points, it is most important that an ideal occlusal pattern be implemented in the final wax pattern model. In other words, the final wax pattern model should have an ideal occlusal pattern so that the occlusal pattern of the final prosthesis is ideal, so that when the prosthesis is cemented to the damaged tooth and the prosthesis is prosthetic, the prosthetic tooth is ideally occluded with the antagonist. It can be performed smoothly and can also comfort the patient.

In order to make the final wax pattern model have an ideal occlusal pattern, it is important to make a working model accurately at the dentist, and the skilled technician of the technician who manufactures the final prosthesis from the working model made at the dentist is also important. How to make a wax pattern model, how to manufacture a wax pattern model, and in particular, a final wax pattern model is completed by using a primary wax pattern model manufactured in an ideal form by clinical experiment in advance by a molding apparatus. In this case, it is of utmost importance that the first wax pattern model is molded by a molding apparatus. In other words, how to perform the waxing process well.

In the above-described wax-up process, the first and second methods of creating a wax pattern model are commonly used because they have the advantage of making a final wax pattern model in a relatively short time (particularly, the advantages of the first method). to be. However, according to these methods, not only the occlusal pattern of the wax pattern model is ideal, but also there is a high possibility that the occlusal contact of the face-to-face contact will occur, and the natural crown formation will be very difficult. Since it is necessary to sculpt and complete the ridges, it is very difficult to perform the desired authoring function.

The third method of making the wax pattern model described above is to make wax cones by placing the wax on the damaged model to form a bridge, and then create the cusp and the head tilt angle by repeatedly adding wax to the wax cone and the damaged model. And it is well known and recommended that the wax pattern model having the most ideal occlusal pattern is made in that it can accurately implement the inclination angle of the head, but it takes much more work time than other methods. As a laboratory to be pursued, it is naturally avoided, and a high technique of a technician is required, and it is almost impossible to make a thin wax pattern model by this method.

In addition, the fourth method of making the wax pattern model described above is a more advanced method than the above methods, and wax-molded wax patterns designed by clinical experiments to be well matched with existing natural teeth and to facilitate rational fit with the contralateral teeth. It is a wax-up method using mass production easily by a device. According to this method, since the mass production of the wax pattern is possible, there is an advantage that a wax pattern can be made in a short time.

According to this fourth method, the following matters should be considered in forming the final wax pattern model using the primary wax pattern model.

First, the occlusion pattern of the primary wax pattern model should be as close as possible to the ideal occlusion pattern of the final wax pattern model, and the thickness of the primary wax pattern model should be formed as close as possible to the thickness of the final wax pattern model. This is because if the occlusal pattern and thickness of the primary wax pattern model are significantly different from the ideal occlusal pattern and thickness of the final wax pattern model, the wax must be repeatedly added to compensate for and eliminate the difference. The process takes a lot of work time, so it is necessary to reduce this work time. In other words, if the occlusal pattern and thickness of the primary wax pattern model are close to the ideal occlusal pattern and thickness of the final wax pattern model, the primary wax pattern model can immediately enter the casting process with little or no additive waxing. have.

Second, the primary wax pattern model should not only have flexibility under sufficient processing temperature conditions, but also have low flexibility under temperature conditions below the working temperature. This point is similarly required for the wax or wax sheet when making the final wax pattern with the wax or wax sheet without using a primary wax pattern model. For example, it should have sufficient flexibility to facilitate the plastic deformation maintenance fit at room temperature, and for example, it should be able to be easily cured to maintain the plastic deformation state at a lower temperature.

Third, the tensile strength should be high so as not to fracture when processing the primary wax pattern model. In order to make the final wax pattern model, the first wax pattern model is covered with the damage model and then the external wax is partially applied to the primary wax pattern model in order to fit the occlusal pattern. Under these external forces, the first wax pattern model should be well adapted and not broken at the same time to form the final wax pattern model with precise occlusal surface. In particular, when the primary wax pattern model is thin, it must have sufficient tensile strength to not fracture. In addition, especially during the wax-up work, when forming the cusp and inclination angle, since the wax is added to the occlusal surface of the primary wax pattern model by engraving one or several times, the primary wax pattern model must not be fractured. It can be fitted in an efficient and efficient manner.

Fourth, the primary wax pattern model should have good physical properties to maintain the deformed shape after suitably deformed. That is, after deformation, it must be cured while maintaining the deformed state. In order to ideally implement the occlusal pattern in the final wax pattern model, when the primary wax pattern model is deformed by applying an external force with engraving, etc., the occlusal pattern can be precisely maintained only when the deformed shape is maintained as it is. Because there is.

Fifth, the finished wax pattern model should have good volume stability. That is, the cured final wax pattern model has almost no thermal expansion and should be able to maintain the cured state when external force is applied, for example, during investment operation. This is because the final wax pattern model is buried and burned in the refractory investment material while the final wax pattern model is buried and burned without changing its shape or volume. This is because the prosthesis can be cast in the shape of the pattern model.

On the other hand, a primary wax pattern model prepared in advance by a molding apparatus is generally known under the trade name of molding wax, for example, a base composed of 70 to 80% of paraffin or Ce resin and a small amount of bees wax. Plate wax (this wax is a soft wax, called base plate wax type I, and there are more types II and III depending on the composition) (hereinafter referred to as 'wax 1') or the boiling point of paraffin 40 ~ 60%. Blue Inlay Wax, standard No4 Type II, defined by the International Dental Federation, mainly composed of this high petrolatum, pine natural resin, or tropical palm leaf fine powder. It is made by using only one of the waxes called 'wax 2' or perfect wax (hereinafter referred to as 'wax 3').

Of these waxes, the primary wax pattern model formed using wax 1 is most used at present due to its advantages in terms of workability because of its flexibility, i.e., good fluidity, at working temperature conditions for molding. However, it is difficult to make a final wax pattern model having an accurate occlusal pattern because wax 1 has low holding force and volume stability against deformation during curing and curing state after molding. In other words, if the holding force and volume stability of deformation are not good, the final wax pattern model which is not only buried in the casting machine but also the final wax pattern model that is buried until the heating is buried and heated is not only buried in the casting machine. It is impossible to cast the correct prosthesis by deforming without maintaining the shape of the pattern model. In addition, there is a problem that the tensile strength is weak, so well broken during processing. In particular, when the primary wax pattern model has a thin thickness of 0.5 millimeter or less, the primary wax pattern model is more fractured during processing.

In addition, since wax 2 has good volume stability, the wax pattern model produced by the wax 2 burns while maintaining the shape before being buried in the process of being buried in an electric furnace, so that the mold having the same shape as that of the final wax pattern model before being buried is obtained. The advantage is that it can be made. However, Wax 2 is less brittle because of its fluidity at room temperature than that of Wax 1 and thus fractures well. In addition, wax 2 has a problem that it is well fractured due to its weak tensile strength. In particular, since the strength is weaker when thin, the primary wax pattern model made of wax 2 generally has a thickness of 0.5 mm or more. Therefore, when the gap between the damage value and the antagonist is close, it is time consuming because the first wax pattern model having a large thickness must be deleted several times. Therefore, in the case where the wax 2 needs to compensate for the thickness of the thin primary wax pattern model made of the wax 1, the wax stability of the final wax pattern model made using the primary wax pattern model made of the wax 1 is achieved. It is generally used as a supplement to the primary wax pattern model.

The primary wax pattern model made using wax 3 has the advantage of strong tensile strength, but it has very poor flowability and strong brittleness at room temperature, resulting in very poor workability. Therefore, it is rarely used because it is very difficult to process the primary wax pattern model to produce the final wax pattern model.

Conventionally, in order to manufacture a primary wax pattern model, the lower mold having an occlusal pattern groove row for the maxillary teeth and an occlusal pattern groove row for the mandibular difference parallel to the longitudinal direction; A molding apparatus made of an upper mold having protrusions formed on a bottom thereof corresponding to each of the pattern grooves was used.

According to this molding apparatus, the upper mold | type and the lower mold | type have an independent structure of the state which is not connected with each other. In this way, since the upper molds are separated from each other, pin grooves are formed on both sides of the upper surface of the lower mold, and reference pins inserted into the pin grooves are projected on both sides of the lower surface of the upper mold. . In addition, a simple occlusal pattern is formed on the bottom surface of the pattern groove, not a precise occlusal pattern, and a protrusion is formed between the inner circumferential surface of the pattern groove and the outer circumferential surface of the protrusion, rather than being inserted into and closely contacted with the pattern groove. . This gap has a minimum gap of about 0.5 millimeters in consideration of the physical properties of the used wax, which is the material of the primary wax pattern model, during the wax-up operation so that the primary wax pattern model does not fracture well during processing. In addition, the bottom of the protruding portion does not have an occlusal pattern such as the bottom surface of the pattern groove, but is formed in a simple arc shape. In addition, the arrangement order of the pattern grooves of the pattern groove sequence for the upper and lower jaws is not in the order of the natural teeth but in the order of the mixed order. In addition, both the upper and lower molds are made of silicon.

When shaping the primary wax pattern model by this molding apparatus, any one of waxes 1 to wax 3 is dropped into the pattern groove of the lower mold corresponding to the damage value, and then the upper mold is lifted and inserted into the corresponding pattern groove. The primary wax pattern model is formed by aligning the reference pin with the pin groove so that the upper pin is coupled to the lower mold and pressing by hand. Next, the upper mold is lifted out of the lower mold and the primary wax pattern model is removed from the pattern groove. The primary wax pattern model formed as described above has a thickness equal to the gap between the pattern groove and the protrusion. That is, the minimum thickness is 0.5 millimeters and the remainder has a thickness greater than 0.5 millimeters. The outer circumferential surface of the primary wax pattern model has an occlusal pattern having the same shape as the inner circumferential surface of the wax pattern groove, and the inner circumferential surface of the primary wax pattern model is formed in the same manner as the outer circumferential surface of the protrusion.

However, the primary wax pattern model molding method as described above has the following problems.

First, since the shape of the pattern grooves and the protrusions is different from each other and the narrowest gap between the pattern grooves and the protrusions is about 0.5 millimeters, the primary wax pattern model having a uniform thickness as a whole cannot be formed. That is, only the first wax pattern model having a minimum thickness of 0.5 millimeters and the other portion having a thickness of 0.5 millimeters or more is formed, and thus, primary patterns having various thicknesses cannot be produced. When the primary wax pattern model does not have a uniform thickness, it takes a lot of time because of the repeated wax addition process in the process of making the final wax pattern model. In addition, since the physical properties are not uniform as a whole, the weak part of the primary wax pattern model, that is, the part with the smallest thickness, fractures well during the wax-up operation. As described above, the reason why the gap between the pattern groove and the protrusion is provided is that the upper and lower molds are made of silicon, and thus, it is difficult to produce a close gap because the upper and lower molds are easily attached to each other.

Second, it is impossible to form a primary wax pattern model having a thickness of less than 0.5 millimeters or less than 0.5 millimeters in total. As a result, when the gap between the damage value and the antagonist is a tight gap smaller than 0.5 mm, the thickness of the primary wax pattern model is increased when the final wax pattern model is made using the primary wax pattern model manufactured by a conventional molding apparatus. Excessively delete the primary wax pattern model little by little repeatedly (usually the working time to delete is longer than the time to replenish the wax) to match the thickness, if the gap between the damage value and the antagonist value is large It takes a lot of work time because the work of replenishing wax repeatedly on the outer circumferential surface of the primary wax pattern model requires a lot of work. In particular, if the thickness of the primary wax pattern model is thick, the curing time is increased exponentially according to the thickness ratio, so that it takes not only a long time to form the primary wax pattern model but also a long time to process the final wax pattern model. do.

Third, since the upper and lower molds are made of silicon rubber having low hardness and high elasticity and low resistance to deformation, it is difficult to form the primary wax pattern model in the shape of the pattern groove by the protrusion when pressing the upper mold.

Fourth, not only the molding pressure is low but also the surface roughness of the silicone rubber is rough and shrinking microsurface bubbles are generated on the surface of the molded primary wax pattern model, so that the surface is rough and the surface is not formed smoothly.

Fifth, since silicon rubber is expensive, it is a factor in the increase of manufacturing cost of primary wax pattern model.

The present invention has been made to solve the problems described above, and an object of the present invention is to make it possible to accurately and easily make a final wax pattern model so that an accurate prosthesis can be cast.

Another object of the present invention is to make the primary wax pattern model used to make the final wax pattern model closer to the final wax pattern model.

Another object of the present invention is to be able to arbitrarily make the primary wax pattern to the desired thickness.

Still another object of the present invention is to form a wax pattern model in the process of processing the final wax pattern model and in the process of embedding the final wax pattern model in an electric furnace to cast the prosthesis, even if the primary wax pattern model is molded to a thin thickness. This is to have a good workability that can withstand without being deformed or damaged.

Still another object of the present invention is to allow a virtual occlusal shape to be easily implemented in the wax pattern model when the corresponding teeth of the upper and lower jaw are damaged.

An additional object of the present invention is to make it easy to create a wax pattern model for making a pontic for repairing missing teeth.

1 is a perspective view showing an open state of a device used in the wax pattern model manufacturing method according to the present invention.

2 is a cross-sectional view showing an example of a state of manufacturing a primary wax pattern model by the apparatus used in the wax pattern model manufacturing method according to the present invention.

3 is a perspective view showing an upper surface of the primary wax pattern model formed by the apparatus of FIG.

4 is a perspective view illustrating a bottom surface of the primary wax pattern model of FIG. 3.

5A to 5C are cross-sectional views showing Embodiment 1 of a method of manufacturing a final wax pattern model according to the present invention.

6a to 6d are cross-sectional views showing Example 2 of the method for manufacturing a final wax pattern model according to the present invention.

7A to 7D are cross-sectional views showing Example 3 and Example 4 of the method for manufacturing a final wax pattern model according to the present invention.

8A to 8D are cross-sectional views showing Example 5 of the method of manufacturing the final wax pattern model according to the present invention.

9 is a cross-sectional view showing a sixth embodiment of a method for manufacturing a final wax pattern model according to the present invention.

10A and 10B are perspective views illustrating a top surface of a final wax pattern product manufactured by the method of manufacturing a final wax pattern model according to the present invention.

11A to 11D are perspective views showing the bottom surface of the final wax pattern manufactured by the method for manufacturing a final wax pattern model according to the present invention.

12 is a perspective view showing the top surface of the final wax pattern model according to the present invention.

13 is a perspective view showing the bottom of the final wax pattern model according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Lower type 2: Upper type

3: link mechanism 5: primary wax pattern model

7: Final wax pattern model 13: Pattern groove

23: projection 31, 32: arm

33: hinge 51: supplemental wax

52: wax cone 53: wax sheet or synthetic resin sheet

54: Wax Block 61: Damage Model

62: antagonist model

The wax pattern model according to the present invention is well known under the trade name molding wax, for example, a base plate wax composed of 70 to 80% of paraffin or Ce resin and a small amount of bees wax (this wax is a soft type wax). As base plate wax type I, and there are further types II and III according to the composition component (hereinafter referred to as wax 1); Blue Inlay Wax, a standard set by the International Dental Federation, mainly composed of petroleum jelly, pine natural resin or tropical palm leaf fine powder with high boiling point of 40 to 60% of paraffin. (Hereinafter referred to as "wax 2"); In addition, the perfect wax (hereinafter referred to as "wax 3") is mixed by a predetermined ratio is formed by the molding apparatus so that the mixed wax has a pattern close to the occlusal pattern of the final wax pattern model It features.

The mixing ratio of the waxes is preferably determined according to the wax up working temperature conditions. In other words, wax 1 has good flexibility, that is, fluidity at the wax-up working temperature, but the curing rate is slow due to the temperature drop after molding, and the retention and volume stability of the occlusal stability in the curing state are relatively low. Although the volume stability is good, the fluidity is lower than wax 1 at room temperature, so the flexibility of molding is poor, and the workability is poor.Wax 3 has a high tensile strength, but it has very low flowability and brittleness at room temperature, which is very bad. Considering the point, the composition ratio should be determined.

Therefore, when considering the workability in making a wax pattern model, the ratio of wax 1 is increased while the ratio of wax 2 is reduced, and when the tensile strength is considered, the ratio of wax 3 is slightly increased. In addition, when considering the volume stability when casting using the wax pattern model, the ratio of wax 2 is increased and the ratio of wax 1 is lowered.

According to the present invention, the mixed wax is preferably composed of 15 to 80% of wax 1, 15 to 80% of wax 2, and 5 to 10% of wax 3 in a weight ratio. When the primary wax pattern model is made by the mixed wax composed of such a component ratio, flexibility, tensile strength and strain retention are good at the wax-up working temperature, and strain retention, fracture resistance and volume stability are improved after curing.

In addition, the method for manufacturing a wax pattern model according to the present invention is a method for manufacturing a primary wax pattern model, which is an intermediate material for making a final wax pattern model by a molding apparatus using the mixed wax, 1, wax 2 and wax 3 Mixing the wax at a predetermined ratio to form a mixed wax, and the mixed wax is arranged in the order of the maxillary and mandibular teeth, and each of the two rows of maxillary and the pattern grooves having a predetermined occlusal pattern formed on each bottom surface; Occlusion pattern of the final wax pattern model by a molding apparatus consisting of a lower die formed in parallel with the lower pattern grooves on the upper surface, and an upper die formed on the bottom of two rows of protrusions formed of protrusions of the shape inserted into and closely contacted with the pattern grooves. It characterized in that it comprises a step of forming into a primary wax pattern model having an almost identical occlusal pattern.

In addition, the wax pattern model manufacturing method according to the present invention, as a method for manufacturing the final wax pattern model using the primary wax pattern model, the following methods may be employed.

First, a method of covering the primary wax pattern model on the damage model and then repairing the insufficient part of the primary wax pattern model with supplemental wax or deleting the excess part.

Second, the wax is placed on the damaged model to form a wax cone, the primary wax pattern model is covered on it, and the insufficient part of the primary wax pattern model is repaired with supplemental wax or the excessive part is deleted.

Third, a method of attaching a wax or synthetic resin sheet to the damaged tooth model, and then covering the primary wax pattern model on the damaged tooth model, and correcting the excess or insufficient parts of the primary wax pattern model.

Fourth, a method of dipping the synthetic resin sheet in wax or attaching the wax to the damaged tooth model, and then covering the primary wax pattern model thereon and adding the excess or insufficient parts of the primary wax pattern model.

Fifth, it is a method of trimming the edges by covering the first wax pattern model on the damage model.

Sixth, the space between the bottom surface of the primary wax pattern model and the top surface of the damage model is covered with a supplemental wax by covering the damage model with the primary wax pattern model.

Seventh, after attaching the wax or synthetic resin sheet to the missing tooth model, the wax block is placed, the primary wax pattern model is covered thereon, and then the inner space of the primary wax pattern model is repaired with supplemental wax.

Eighth, the method of restoring the missing tooth after repairing the soft wax tooth by applying the same primary wax pattern model after the treatment of the separating agent to the soft wax tooth with the supplemental wax.

As described above, if the method of making the first wax pattern model and then finally using the method to complete the final wax pattern model is adopted, the work speed is not only increased but also a relatively accurate and ideal occlusal pattern can be realized in the final wax pattern model. This allows for casting of good quality prostheses.

In addition, the apparatus for manufacturing a wax pattern model according to the present invention is an apparatus for forming a primary wax pattern model, which is an intermediate material used to manufacture a final wax pattern model, arranged in the order of the maxillary and mandibular teeth, and each bottom surface. Two rows of upper and lower pattern groove rows formed of pattern grooves having a predetermined occlusal pattern formed on the upper surface side by side, and two rows of projection columns formed of protrusions inserted into the pattern grooves to be in close contact with each other. It includes an upper mold formed on the bottom.

The lower mold and the upper mold are preferably connected to each other by a link mechanism that allows the upper mold to be easily opened and closed and easily maintains its position at each engagement.

According to the apparatus, since the shape of the pattern groove and the shape of the protrusion are the same, and the protrusion is inserted into the pattern groove tightly and closely adhered without shaking, a primary wax pattern model of a shape closer to the final wax pattern model can be manufactured. In addition, it is possible to manufacture a very thin primary wax pattern model.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

The wax pattern model according to the present invention consists of a mixed wax in which wax 1, wax 2 and wax 3 are mixed in a predetermined ratio.

The mixing ratio of the waxes is preferably determined so that the physical properties required under these wax-up working temperature conditions can be obtained in consideration of the fact that the wax-up work is usually performed at room temperature, that is, room temperature of about 20 to 25 ° C.

That is, the wax-up work is carried out at room temperature, but during the process of making the wax pattern model, the process of welding the wax to the damage value model in a semi-solid state close to the liquid under the temperature condition in the range of 65 ° C to 70 ° C. The process of pressurizing under the temperature condition of, or the process of repairing the wax or removing the wax under the temperature condition in the range of 65 ° C. to 70 ° C. to the press-contacted or pressurized wax is performed, and such processing is about 120 ° C. to 150 ° C. It is done in slices heated to a high temperature of.

Therefore, the mixed wax should have physical properties that can maintain a stable form in a solid state at room temperature. In addition, under waxy working temperature conditions above room temperature, flexibility, tensile strength and strain retention (ie, occlusion stability adaptability) should be good. Deformation sustainability refers to a property that is well deformed under wax-up working temperature conditions and can be cured while maintaining this deformation. It is because the workability for processing the wax pattern model is improved only when these properties are good. In addition, the mixed wax should have good deformation retention, fracture resistance and volume stability after curing. This is because the prosthesis having the same shape as the wax pattern model may be cast when the wax pattern model is buried in order to cast the prosthesis, even if it is not easily deformed even under external force.

Regarding the requirements for the mixed wax described above, wax 1 has good flexibility, i.e., fluidity at the wax-up working temperature, but the curing rate is slow due to the temperature drop after molding, and the holding force and volume stability of the deformation in the curing state. This relatively low point, wax 2 has a good volume stability, but the fluidity at room temperature is lower than wax 1, so the flexibility of molding is poor, and the workability is poor, and wax 3 has a high tensile strength but little fluidity at room temperature According to the present invention, the mixed wax is preferably 15 to 80% of wax 1, 15 to 80% of wax 2, 5 to 10% of wax 2, and 5 to 10% by weight in view of the brittleness and the poor workability. Is mixed to form.

In other words, when considering the workability in making the wax pattern model, while increasing the ratio of the wax 1 within the mixing ratio range while reducing the ratio of the wax 2, the ratio of the wax 3 is slightly increased when considering the tensile strength. In addition, when considering the volume stability to prevent deformation during investment for casting using a wax pattern model, the ratio of wax 2 is increased and the ratio of wax 1 is lowered. In consideration of this point, if the range is appropriately adjusted within the above range, a mixed wax suitable for the wax-up working temperature condition may be formed.

When the mixed wax is composed of the above-described component ratios, the wax pattern model is formed using the mixed wax rather than the wax pattern model using only one kind of the wax 1 to wax 3 in the general physical properties. Experiments have shown that flexibility, tensile strength and strain retention are good before curing, and that deformation stability and volume stability are good after curing. Therefore, because the mixed wax has good flexibility, tensile strength and strain retention, the wax pattern model is not broken in the process of processing and modifying the wax pattern model even if the wax pattern model is thinly formed. It becomes good. In addition, since the volume stability is improved after curing, it is able to withstand external forces at the time of investment.

Next, preferred embodiments of the method for producing a wax pattern model using the mixed wax prepared as described above will be described.

<Example 1>

5A to 5C sequentially illustrate a process of a wax pattern model manufacturing method according to Embodiment 1 of the present invention, and a process for manufacturing a final wax pattern model 7 as shown in FIGS. 12 and 13 is shown. It is shown.

According to the production method of Example 1, first, wax 1, wax 2 and wax 3 are mixed at a predetermined ratio as described above to form a mixed wax. Next, a predetermined primary wax pattern model 5 (see FIGS. 3 and 4) is manufactured by a molding apparatus (see FIGS. 1 and 2). Next, a wax separator is applied to the damaged tooth model 61 and then the primary wax pattern model 5 is covered. Next, while repeating the occlusion of the damaged tooth model 61 and the antagonist model 62, the excess portion of the occlusal surface of the primary wax pattern model 5 is deleted or the supplemental wax is replenished to repair the insufficient portion. . Next, the primary wax pattern model 5 is adhered to the antagonist model 62 with soft wax (meaning simple adhesion or random attachment), and then supplemented with a supplemental wax 51 on the damaged tooth model. After the damage value model 61 and the antagonist model 62 are occluded and the edges are extended, the final wax pattern model 7 is completed. As the supplemental wax 51, wax 2 is preferably employed to improve the volume stability of the final wax pattern model 7. However, mixed wax may be used.

In Example 1, the primary wax pattern model 5 may be mounted on the damaged tooth model 61 to trim the edges, and then the final wax pattern model 7 may be manufactured by the above process.

The apparatus used in the method for manufacturing a wax pattern model according to the present invention is a device for molding the above-described primary wax pattern model 5, as shown in Figs. 1 and 2, the upper mold 1 and the lower mold ( 2) is made, including. And the link mechanism 3 can be further included so that the upper mold | type 1 can be opened and closed easily by connecting these mutually.

On the upper surface of the lower mold (2), two rows of upper and lower pattern groove rows (11, 12) consisting of pattern grooves (13) formed on the inner circumferential surface in an ideal occlusal pattern are formed side by side. In addition, two rows of protrusions are formed on the bottom surface of the upper die 1, each of which includes protrusions 23 having a shape inserted into and closely contacted with the pattern grooves 13.

The pattern grooves 13 of the pattern groove rows 11 and 12 of the lower mold 2 are preferably arranged in the order of the upper and lower teeth, respectively. Here, an example is shown in which a large molar pattern groove 13 is formed toward the center and a small molar pattern groove 13 toward the edge is shown. In addition, a large premolar pattern groove 13 may be formed toward the center, and a small premolar pattern groove 13 may be formed toward the edge.

The protrusion 23 may be inserted into the pattern groove 13 of the lower mold 2 in consideration of the following points. That is, after depositing the mixed wax of the fluid state in the predetermined pattern groove 13, a predetermined time elapsed, for example, between 3 seconds and 10 seconds (3-4 seconds for the premolar and 9-10 seconds for the molar). After the upper mold (1) is covered on the lower mold (2), the longer the time elapsed from when the mixed wax is deposited on the pattern groove (13) to the upper mold (1) on the lower mold (2), the hardening degree of the wax composition is longer. Is gradually deepened, and thus the malleability of the mixed wax pressed and compressed by the upper die 1 is also considered. Therefore, the longer the time from depositing the wax composition to covering the upper mold 1 on the lower mold 2, the thicker primary wax pattern model 5 is obtained, and the molded primary wax pattern model 5 is obtained. It can be seen that the curing time of is also longer, and the shorter this time is, the thinner the primary wax pattern model 5 can be obtained and the curing time of the molded primary wax pattern model 5 is also shorter. In other words, the thinner the primary wax pattern model 5, the shorter the molding operation time. In addition, when the protrusion 23 is inserted into the pattern groove 13 to be inserted into the pattern groove 13, the mixed wax in the deep groove of the bottom surface of the pattern groove 13, that is, the intersection of the primary wax pattern model 5 Can be filled well, so that the primary wax pattern model 5 having an occlusal pattern closer to the ideal occlusion pattern of the desired final wax pattern model 7 can be produced.

The device used in the wax pattern manufacturing method according to the invention is made to press the lower mold (2) with a constant force. That is, when the mixed wax is pressurized with a constant force only by varying the deposition holding time of the mixed wax until the upper mold 1 is covered on the lower mold 2, the primary wax pattern model ( Considering that the thickness of 5) increases and decreases. According to the device of the invention, the force exerted by the lower die 2 can be made constant by the force exerted only by the weight of the upper die 1.

Therefore, in the present invention, after filling the mixed wax in the pattern groove 13, only changing the time until covering the upper mold (1) in consideration of the gap between the damage value and the opposing value and the pressure for pressing the mixed wax is constant The primary wax pattern model 5 of various thicknesses as desired can be obtained. Although the primary wax pattern model 5 made in this way has a different thickness depending on the deposition holding time of the mixed wax, in particular, the production of the primary wax pattern model 5 having a thin thickness by shortening the deposition holding time of the mixed wax. Is possible. In other words, when the deposition wax holding time of the mixed wax is short, the mixed wax has good fluidity. When the upper mold 1 is pressed against the lower mold 2, the mixed wax has good malleability, and the mixed wax is thinned by the pressure of the protrusion 23. Since it spreads, the primary wax pattern model 5 of thin thickness of, for example, 0.1 to 0.5 millimeter can also be easily formed.

In addition, according to the present invention, since the protrusion 23 is inserted into and closely contacted with the pattern groove 13, the first wax pattern model is formed when the film having a predetermined thickness is sandwiched between the upper mold 1 and the lower mold 2. (5) will have the same thickness as the film thickness.

As described above, when the primary wax pattern model 5 having an occlusal pattern close to the ideal occlusal pattern and having various thicknesses can be arbitrarily produced, the final wax pattern model is used by using the primary wax pattern model 5. Since the work of adding the primary wax pattern model (5), which takes a lot of time when making (7), is significantly reduced, not only can the final wax pattern model (7) be completed in a short time, but also the precise final wax pattern model Production of (7) becomes possible.

Further, according to the device of the present invention, the upper mold 1 and the lower mold 2 are preferably connected by a linkage mechanism 3 so that a constant self weight of the upper mold 1 acts on the lower mold 2, By this link mechanism 3, a constant force can be applied to the lower mold 2, and the upper mold 1 can be easily opened and closed.

In addition, according to the apparatus of the present invention, the lower mold 2 is made of a silicone rubber that can allow elastic deformation and restoration to the external force being pressed, and the upper mold 1 is made of a non-elastic material such as gypsum, which is harder than the silicone rubber. desirable. The upper mold 1 may be made of a hard material metal or synthetic resin in addition to gypsum. If the lower mold 2 is made of silicone rubber, and the upper mold 1 is made of a silicone rubber and a harder and harder material than other silicones, the lower mold 1 and the upper mold 2 are not attached to each other during molding, so that the pattern groove 13 ), The pattern groove 13 and the protrusion 23 may be formed to be in close contact with the protrusion 23. In addition, if the upper mold (1) is made of a solid and hard material, not only the performance of pressurizing the lower mold (2) is excellent, but also the surface properties of the molded primary wax pattern model (5) are excellent as well as the surface quality. Also becomes excellent. In addition, since there is little elasticity and there is no fear of deformation, a more accurate primary wax pattern model 5 can be molded.

On the other hand, the link mechanism 3, the L-shaped arm 31, one end of which is connected to one side of the lower mold 2, and one end of the one end of the upper mold 1, the other end of the L-shaped arm 31 It comprises a straight arm 32 which is connected to the other end of the hinge and the hinge 33 so as to be rotated up and down. In other words, the link mechanism 3 has a channel shape. Therefore, when the upper mold 1 is covered with the lower mold 2 turned on, only the own weight of the upper mold 1 acts on the lower mold 2. When the upper mold 1 covering the lower mold 2 is lifted from the lower mold 2 and separated, the upper mold 1 is lowered by holding the upper mold 1 and raising the straight arm 32 by turning the upper arm 1 based on the hinge. Can be separated from (2). The upper mold 1 separated from the lower mold 2 is preferably made so that the turning can be stopped at a position where the arms 31 and 32 form a predetermined acute angle.

It was adopted for the following reasons that the link mechanism 3 was formed into a channel shape so that the upper die 1 was rotated. That is, when the lower mold (2) and the upper mold (1) by the hinge is made of a structure that is directly coupled to the pivoting structure, after filling the mixed wax into the pattern groove 13, the upper mold ( When 1) is turned down to cover and pressurize the lower mold 2, the mixed wax located in the hinge side portion is first pressed by the protrusion 23 and is subjected to a lot of pressure. Because of this, the mixed wax is not uniformly pressurized, so that the primary wax pattern model 5 does not have uniform physical properties, but also partially becomes fragile, and is easily fractured when the final wax pattern model 7 is processed. There is concern.

Therefore, when the link mechanism 3 is formed in a channel shape, the mixed wax deposited in the pattern groove 13 is vertically pressed by the protrusion 23 when the upper mold 1 is covered by the lower mold 2, so that the primary wax pattern is formed. The model 5 has uniform physical properties. As such, the lengths of the arms 31 and 32 are preferably made as long as possible so that the mixed wax can be vertically pressed. In addition, although not shown in the figure, if the link mechanism 3 is installed so that the free end side is slightly inclined upwardly than the upper and lower molds 2 side, the mixed wax can be pressed more reliably vertically. In addition, the link mechanism (3) can also be made in a wedge-shaped shape, if the pressure is to be started vertically downward by the upper mold (1) should be included in the scope of the invention.

Further, according to the present invention, when the upper die 1 is covered with the lower die 2 by the adoption of the link mechanism 3, the upper die 1 is pivoted down without having to align the pattern groove 13 and the protrusion 23. Not only is it convenient, but also the working time of the primary wax pattern model 5 is faster.

In addition, according to the present invention, the pattern grooves 13 in each of the pattern grooves 13 are arranged in the same size as the arrangement of natural teeth, so that the mixed wax is deposited on the pattern grooves 13 other than the desired pattern grooves 13. The error of making the primary wax pattern model 5 can be prevented.

In order to make the primary wax pattern model 5 using the apparatus according to the present invention made as described above, since the lower mold 2 is made of silicone rubber, the upper mold 1 is not required because the surface separator is not required to be coated. Only first coat the surface separator. Subsequently, an almost liquid mixed wax at a temperature of about 65 to 80 ° C. is deposited in a predetermined amount in the predetermined pattern groove 13 of the lower mold 2 to produce a primary wax pattern model 5 having a predetermined thickness. After the deposition holding time of about 3 to 10 seconds has elapsed, the upper mold 1 is covered with the lower mold 2 so that the weight of the upper mold 1 acts on the lower mold 2 for about 3 to 6 seconds. After holding, the upper mold 1 is separated from the lower mold 2. At this time, although the volume of the wax pattern is larger than that of the teeth (mandibular teeth), the primary wax pattern model 5 returns to the original tooth size due to the semi-solid wax pattern state and the elasticity of the silicone rubber, thereby obtaining a precise wax pattern. Next, the primary wax pattern model 5 molded to a predetermined thickness is separated into a hand or a blunt piece. At this time, in order to form the primary wax pattern model 5 of precise thickness, a film having a predetermined thickness is sandwiched between the lower mold 2 and the upper mold 1 before the upper mold 1 is covered by the lower mold 2. The primary wax pattern model 5 can be molded.

<Example 2>

6A through 6D sequentially illustrate a process of a wax pattern model manufacturing method according to Embodiment 2 of the present invention.

In the manufacturing method according to the second embodiment, in the manufacturing method of the above-described first embodiment, the wax is raised to accurately form a short piling portion before the primary wax pattern model 5 is applied to the damaged tooth model 61. (52), and the same configuration and operation except that the step of placing the primary wax pattern model (5) thereon to engage the damage model 61 and the antagonist model 62 is the same. Therefore it is the same as the configuration and operation in the first embodiment described above. The wax cone 52 may be removed before the supplemental wax 51 is filled in the lower portion of the primary wax pattern model 5.

<Example 3>

7A to 7C sequentially illustrate the process of the wax pattern model manufacturing method according to the third embodiment of the present invention.

In the manufacturing method according to the third embodiment, the wax sheet or the synthetic resin sheet 53 is damaged before the damaged wax model 61 is covered with the primary wax pattern model 5 in the manufacturing method of the first embodiment. The construction and operation in the above-described Embodiment 1 are the same except that the step of attaching the primary wax pattern model 5 to it after attaching to (61) is further included. When the wax sheet or the synthetic resin sheet 53 is added, the attachment surface with the damaged tooth model 61 becomes smooth when the finished final wax pattern model is separated from the damaged tooth model 61. In addition, the wax sheet or the synthetic resin sheet 53 may be used after dipping the liquid wax.

<Example 4>

8A to 8D sequentially illustrate a process of a wax pattern model manufacturing method according to Embodiment 4 of the present invention.

In the manufacturing method according to the fourth embodiment, the wax sheet or the synthetic resin sheet 53 is damaged before the wax is placed on the damaged tooth model 61 to form the wax cone 52 in the manufacturing method of the second embodiment. The construction and operation in the second embodiment described above are identical except that the method further includes the step of attaching to the model 61 and then placing a wax thereon to form a wax cone 52. When the wax sheet or the synthetic resin sheet 53 is added, the damaged secondary model 61 and the damaged secondary model 61 are separated from the damaged secondary model 61 as in the above-described third embodiment. Surface becomes smooth.

<Example 5>

9 is a cross-sectional view showing a process of a wax pattern model manufacturing method according to Embodiment 5 of the present invention.

In the manufacturing method according to the fifth embodiment, the primary wax pattern model 5 is placed on the damage tooth model 61, the damage tooth model 61 and the antagonist model 62 are occluded, and then the primary wax pattern model ( A method of manufacturing the final wax pattern model 7 by trimming or extending the edge of 5).

The manufacturing method according to the fifth embodiment is used when the gap between damaged natural teeth and clam natural teeth is uniformly close to, for example, in the range of 0.3 to 0.4 millimeters, and at this time, additional wax repair or deletion may be excluded.

<Example 6>

10A and 10B illustrate a process of a wax pattern model manufacturing method according to Embodiment 6 of the present invention.

In the manufacturing method according to the sixth embodiment, the damaged tooth model 61 and the antagonist model 62 are occluded by covering the damaged tooth model 61 with the primary wax pattern model 5 formed of mixed wax. And filling the space between the bottom of the primary wax pattern model 5 and the damaged tooth model 61 to repair and trim the edges.

The manufacturing method according to the sixth embodiment may be employed when the gap between the damaged natural teeth and the opposing natural teeth is partially close to the center side or one side. That is, it is a method that can be effectively employed when the minimum gap is 0.3 mm or less and the maximum gap is in the range of 1 to 1.5 mm. In particular, it may be employed to make a prosthesis for a damaged premolar. When filling the supplemental wax 51 between the bottom of the primary wax pattern model 5 and the damaged model 61, the damaged model after random attachment so that the supplemental wax 51 can be evenly filled without missing. It is recommended to charge (61) upright or upside down (using gravity). Only in this way can the micro-occlusal relationship be automatically adjusted in the process of refitting the working model and then checking the occlusal occlusion.

<Example 7>

11A to 11D illustrate a method of manufacturing a wax pattern model according to Embodiment 7 of the present invention.

The manufacturing method of Example 7 is a method of manufacturing a final wax pattern model used to make a pontic for missing teeth, and attaches a wax sheet or a synthetic resin sheet 53 to the missing damaged tooth model 61. Then, a wax block 54 made of, for example, soft wax 1 is placed thereon, and the primary wax pattern model 5 is overlaid and the antagonist model 62 is occluded to trim or extend the edge to harden. After making a hole on one side of the outer circumference and excavating the wax block 54 therein to make a final wax pattern model (7).

Although not shown in the drawings, the following method may be further employed as a method of making a final wax pattern model for making a panic.

First, the primary wax pattern model is placed in the pattern groove of the lower mold of the molding apparatus for making this, and then wax is cured by hardening it. Then, a hole is formed on one side of the outer circumference to dig out the inside to make a final wax pattern model.

Second, place a wax sheet or resin sheet on the damage model, put the first wax pattern model on it, fill it with soft wax 1 between the sheet and the primary wax pattern model, and then wrap the wax 2 or mixed edges. It is a method of making a final wax pattern model by hardening by extension treatment with wax and then drilling a hole in one side of the outer circumferential surface to dig out the soft wax 1 inside. Soft wax 1 can be removed by applying a separator on the soft wax 1 and applying the primary wax pattern model to the soft wax 1.

In the above methods, when the wax 1 is removed, the wax 1 is easily removed since the primary wax pattern model and the wax sheet or the synthetic resin sheet are harder than the wax 1, and thus the final wax pattern model is made thin so that the prosthesis is made thin. The thickness of the can also be made thin.

According to the prosthetic wax pattern model and the method and apparatus for manufacturing the same according to the present invention prepared as described above, the following effects can be achieved.

First, when the first wax pattern model 5 is made using the apparatus according to the present invention, and then the final wax pattern model 7 is made, the occlusal pattern close to the ideal occlusal pattern can be realized and the operation is simple. The final wax pattern model 7 can be manufactured in a short time, thereby improving the quality of the prosthesis and increasing productivity.

Secondly, when the primary wax pattern model 5 is made using the apparatus according to the present invention, the primary wax pattern model 5 having various thicknesses and the occlusal pattern close to the ideal occlusal pattern can be arbitrarily made and molded. By checking the teeth of the device, it is possible to produce a final wax pattern model (7) by adopting a primary wax pattern model (5) suitable for various types of damages, thus significantly reducing the wax-up work time. Improvement is planned.

Third, by using the apparatus according to the present invention in advance a large number of various primary wax pattern models (5), and then select the appropriate primary wax pattern model (5) whenever necessary, the final wax pattern model (7) If made, the productivity of the final wax pattern model 7 is further improved.

Fourth, when the wax-up work is performed using the primary wax pattern model 5 made of mixed wax, the workability is improved and smooth work is achieved, so that the final wax pattern model 7 can be precisely manufactured. Since the volume stability of the final wax pattern model 7 is also good and deformation does not occur when the final wax pattern model 7 is buried, the quality of the prosthesis can be improved in this respect as well.

Fifth, when the gap between the damaged and the antagonistic teeth is close, the primary wax pattern model 5 can be made thin in response to this, and the mixed wax can be used to improve the physical properties. Since it is not damaged or deformed, the productivity improvement and the quality improvement effect of the prosthesis are further increased.

Sixth, it is easy to check whether the wax-up work is properly performed because it can work while checking the suitability of the occlusal surface in front, rear, left and right during the wax-up work.

Seventh, when forming the primary wax pattern model (5), because the solid and smooth surface of the first wax pattern model (5) such as gypsum, synthetic resin, metal is pressed by the upper surface (1), the surface of the primary wax pattern model (5) is made densely Not only is this precision made, but the surface is smooth, and thus the volume stability at the time of investment is further improved, and the surface of the cast prosthesis is also smoothed to facilitate polishing.

Eighth, the wax-up operation is easy, not only does not require a high level of skill, but also can quickly re-production.

Ninth, the primary wax pattern models (5) can be made quickly by the molding apparatus at the same time, when the upper jaw damage value as well as the mandible damage value is damaged, and these upper and lower damage model (61) By performing a wax-up operation on the upper and lower jaws, the final wax pattern models 7 for the corresponding injuries of the upper and lower jaws can be quickly and precisely made.

Tenth, even when manufacturing a prosthesis to repair the panic, it is convenient because the final wax pattern can be easily made.

Eleventh, it can be manufactured and designed to be well matched with adjacent natural teeth and to make it easy to fit with a tooth. It can be made thinner than a conventional wax pattern model, and has excellent molding flexibility, volume stability, and fracture resistance. In addition, if the adaptation width is large, the wax pattern model that can be adjusted by cutting the inclination angle control part can obtain reasonable occlusal fit without high skill in selection and occlusal fit.

Finally, there is an additional effect of using the device according to the present invention to simplify the denture covered by the resin to protect the injured tooth until the restoration is repaired with a prosthesis after treatment of the injured tooth at the dentist.

Claims (5)

A first step of forming a mixed wax in which 15 to 80% of the base plate wax, 15 to 80% of the blue cow inlay wax, and 5 to 10% of the perfect wax are mixed; It is arranged in the order of the maxillary and mandibular teeth, each of the inner periphery of the tooth occlusion pattern is formed, two rows of maxillary and mandibular pattern groove row formed side by side on the upper surface, and the lower mold made of silicone rubber, inserted into An upper mold formed of gypsum, synthetic resin, or metal formed on the bottom of two rows of protrusions formed of closely-contacted protrusions, and an L-shaped arm having one end connected to one side of the lower mold, and one side of the upper mold. One end is connected and the other end is mixed with the upper pattern groove of the dental prosthetic wax pattern model manufacturing apparatus comprising a link mechanism comprising a straight arm connected to the other end of the L-shaped arm so as to be pivotable up and down by a hinge. Primary wax formed to have the shape of the pattern groove of uniform thickness by covering the upper mold after 3-10 seconds after filling the wax A second step of producing a pattern model and; A third step of covering the primary wax pattern model on the damage model of the working model; A fourth step of repairing the supplemental wax or deleting an excessive portion of the insufficient portion of the primary wax pattern model while occluding the damaged value model and the antagonistic model; The first wax pattern model, which has undergone the third step, is adhesively bonded to the antagonist model, and then a supplementary wax is placed on the injury model to mate the injury model with the antagonist model, and the edges are extended to make the final wax pattern model. 5th step Method for producing a wax pattern model for a dental prosthesis, characterized in that the made. The method of claim 1, further comprising attaching a wax on the damaged tooth model before the third step, and covering the primary wax pattern model thereon. 3. The method of claim 2, wherein the damaged tooth model is dipped in wax in a liquid state. The method of claim 1, wherein before the third step, waxes are formed on the damage model to be bridged to form wax cones, and the primary wax pattern model is covered thereon to occlude the damage model and the antagonist model. Method for producing a wax pattern model for a dental prosthesis, characterized in that further comprises. 5. The method of claim 4, further comprising attaching a wax or resin sheet on the damage model and covering the primary wax pattern model thereon prior to placing the wax on the damage model to form wax cones. Method for producing a wax pattern model for a dental prosthesis.