KR100903779B1 - Dental prosthesis And Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to a dental prosthesis, and more specifically, divided into three parts (3 pieces) is produced by screw-free prosthesis that can be removed without abutment (natural teeth), easy to install, evenly distributed occlusal pressure It is about. Moreover, it is related with the casting method of the screw-type prosthesis which employ | adopted carbon or a ceramic casting bolt.

The present invention is a dental prosthesis for restoring lost teeth, the keeper is disposed to wrap one side abutment in the lingual; A base disposed to surround the other abutment tooth and the keeper; And a body coupled to the keeper and the base and screws while acting as an artificial tooth, the body being arranged to wrap one side tooth tooth or the other side tooth tooth in a direction opposite to the direction in which the keeper wraps.

Prosthetics, Carbon, Ceramic, Bolts, Casting

Description

Dental prosthesis and manufacturing method thereof

Dental Crown Bridge Prosthetic Parts

The present invention relates to a dental prosthesis, and more specifically, divided into three parts (3 pieces) is produced by screw-free prosthesis that can be removed without abutment (natural teeth), easy to install, evenly distributed occlusal pressure It is about. Moreover, it is related with the casting method of the screw-type prosthesis which employ | adopted carbon or a ceramic casting bolt.

In general, prostheses are performed when teeth are damaged or lost due to diseases on the oral cavity. Prosthetics is to cover weak teeth or to repair missing areas, the most common of which is the crown bridge that utilizes natural teeth located on the side of the missing teeth as abutment. Crown bridge is a prosthetic method of positioning the artificial tooth 12 in the area where the lost tooth, as shown in Figure 1, after removing some of the side abutment (10) by covering the crown (11) on the abutment (10). However, such crown bridges have the disadvantage of inviting the pain of the patient during the removal (flap) operation, causing a secondary problem such as degeneration of the pulp due to the large amount of hemorrhoids removed from the preparation, and causing the exposure and hypersensitivity of the pulp. . In addition, since the occlusal surface of the preparation is deleted, it is impossible to restore the natural occlusal surface as before.

On the other hand, in order to prevent such a disadvantage, the inlay type prosthesis as shown in Figure 2 may be used. The inlay prosthesis is a prosthesis in which the artificial tooth 20 is inserted into and supported by the tooth loss site, and the inlay 22 fixed to the side abutment is fitted into the recessed groove 21 of the artificial tooth 20. After the hole 24 is inserted into the abutment tooth (see 10 in FIG. 1), the inlay 22 is inserted into the hole and bonded (cemented) to the insertion portion of the inlay 22 ( 27 is inserted from above to fit in the recess 21 of the artificial tooth 20. The inlay prosthesis may be regarded as a prosthesis of a small amount of deletion method in that it is less necessary to delete the preparation tooth (10). However, the inlay prosthesis has a disadvantage in that a hole must be precisely drilled in the preparation tooth 10 to fix the inlay 22. That is, when the accuracy of the hole formed in the preparation tooth falls, there is a problem in which occlusal abnormality occurs and causes inconvenience to the patient.

As a contrast to inlayed prostheses, there has recently been known a fitting prosthesis as shown in FIG. 3. The fitting prosthesis is provided with a plurality of holding portions 33 to surround the abutment teeth 38, and the fitting body 37 provided on the holding portion 33 is fixed to the self 36 of the artificial teeth 35 by fitting. to be. The holding unit 33 may be provided in plurality as needed, there is an advantage in assembly. However, the conventional fitting prosthesis does not delete the abutment 38, so that the occlusality is good and the pain of the patient is reduced. In addition, since the artificial teeth 35 are inserted in the state in which the retaining portion 33 is adhered to the abutment teeth 38 and maintained in the process of assembling the prosthesis, the arch 37 and the self 36 do not fit precisely. Otherwise, there may be a problem in occlusal or the occlusal pressure can not sustain the deformation of the prosthesis when used for a long time.

The present invention is to solve the above problems, to provide a screw-fastening prosthesis and a method of manufacturing the same as a non-delete method that does not delete the abutment, can be easily installed and evenly distributed occlusal pressure.

As the dental prosthesis of the present invention is provided as described above, elimination of abutment is unnecessary, thus minimizing the pain and secondary problems of the patient, and can be easily installed, and the occlusal pressure can be evenly distributed. Lose. In addition, the use of specially designed replication or casting bolts can be used to produce accurate screwing holes.

In order to achieve the above technical problem, the present invention provides a dental prosthesis for restoring lost teeth, a keeper disposed to wrap one side abutment in the lingual; A base that surrounds the lingual side of the other abutment tooth and is arranged to surround the keeper bottom of the keeper with the base bottom of the base; And a body coupled to the keeper and the base by screws while acting as an artificial tooth, the body being arranged to wrap the one side tooth tooth or the other side tooth tooth in a direction opposite to the direction in which the keeper wraps the tooth prosthesis.

The base may be disposed in the lingual direction in which the other abutment is surrounded by the keeper.

In addition, the base is characterized in that it comprises a base rear wall for supporting the rear wall of the body.

The keeper may include a keeper bottom part configured to be seated on a tooth loss part formed by both abutment teeth, and the base may further include a base bottom part configured to surround the keeper bottom part.

In addition, the base bottom portion is provided with a fitting portion into which the keeper bottom portion is fitted, and a female screw for screwing may be formed at the fitting portion.

In addition, a keeper groove may be additionally formed in the keeper bottom portion, and a fitting protrusion may be formed in the fitting portion so as to correspond thereto.

As another aspect of the invention, the present invention is a casting method for manufacturing the dental prosthesis, the step of constructing a replica model for the casting of the base and the body is the first step of fitting the replica bolt to the female screw for screwing A second step of making an impression; a third step of removing the bolt for curing after the hardening; a fourth step of inserting a carbon or ceramic casting bolt into a place where the bolt for removal is removed, and a fifth step of casting through investment; It provides a method for producing a dental prosthesis characterized in that.

Here, the replica bolt injection mark portion is displayed on the replication bolt to inject the impression material from the second step to the injection instruction portion, and the casting bolt is marked on the position indication portion to display the position in the fourth step. It may be advantageous to insert up to the pointing area.

As another aspect of the present invention, the present invention is a casting method for manufacturing the dental prosthesis, the step of constructing a replica model for the casting of the base and the body is the first bolt to attach the replica bolt to the female screw for screwing After the second step of hardening, the third step of hardening, and the third step of casting investment material is removed to obtain the refractory model, and the fourth step of waxing is carried out. Provided is a method of producing a dental prosthesis.

Here, it is further advantageous that the step 3-1 further includes inserting the calibration wire into the place where the replica bolt is removed between the third step and the fourth step.

In addition, the female thread formed on the dental prosthesis is obtained by lathe machining the compression-molded carbon and ceramic to obtain a carbon bolt and a ceramic casting bolt, and then cast by using the same.

As shown in the present invention, Figure 4 shows an overall perspective view of the present invention, Figure 5 is a top loss assembly of one loss posterior part, Figures 6, 7, and 8 are each a keeper, base, body showing the present invention to be. 9 is an assembled view of two lost posterior parts of the present invention, FIG. 10 is an assembled view of four lost anterior teeth of the present invention, and FIGS. 11 to 15 are explanatory views for explaining the manufacturing method of the present invention. On the other hand, Figure 16 is a side view for replication and casting bolts used in the casting of the present invention. In the drawings, parts that are not essential for clarity of understanding of the technical gist of the present invention are omitted, and the omitted parts are in accordance with a conventional dental prosthesis and a method of manufacturing the same.

(First embodiment)

The screw fastening-free dental prosthesis of the present invention will be described in detail with reference to FIGS. 4 to 8 as follows. As shown in FIG. 4, the dental prosthesis of the present invention includes a keeper 100 that wraps the abutment 410 on one side in the lingual side, and a base 200 that wraps the abutment 420 on the other side in the lingual side. And a damaged tooth loss part 430, and is formed of a body (300) surrounding the abutment inner surface of both abutment (410, 420) in the buccal side, and in the case of an anterior part, in the buccal side. . The keeper 100, the base 200 and the body 300 are provided with a bolt fastening hole penetrating each part by a casting method using a casting bolt, the holes are aligned in a straight line to the fastening bolt 350 Is fastened. While the keeper 100 and the base 200 wrap the abutment teeth 410 and 420 on both sides from the lingual side, the body 300 wraps on the buccal side or the right side, so that it can be firmly supported by screwing by a common hole. Do. In addition, as shown in Figure 5, since each part is divided into three parts and assembled sequentially, the removal (flap) of the abutment teeth 410 and 420 is unnecessary, the inconvenience of the patient is minimized, and the assembly is easy.

Each part will be described in more detail with reference to FIGS. 6 to 8. 6, a keeper 100 of the present invention is disclosed. The keeper 100 includes a keeper wall 110, a keeper bottom 120, and a keeper plate 130. The inner surface of the keeper plate 130 and the keeper wall 110 substantially surrounds the centrifugal portion of the lingual side and the one side abutment 410, and the keeper bottom 120 is connected to the bottom of the keeper wall 110. The keeper bottom portion 120 is a portion in contact with the loss portion 430 is manufactured to simulate the shape of the loss portion 430 without inconvenience in accordance with the prosthetic manufacturing method including the usual impression, wax up, casting and the like. Contact. The outer surface of the keeper wall 110 is located at the side of the abutment 410 with a slope of about 2 to 4 degrees with respect to the vertical. The inner surface of the keeper wall 110 is manufactured to simulate the undercut of the abutment 410 as it is in accordance with a conventional prosthetic manufacturing method. The intimate contact between the inner surface of the keeper wall 110 and the abutment 410 undercut improves the support force of the prosthesis. The specific manufacturing method will be described later in detail. On the other hand, the keeper plate 130 is manufactured to surround the abutment 410 on the lingual side and faithfully mimic the shape of the abutment 410 like the keeper wall 110. While the keeper plate 130 wraps on the lingual side, the body 300 screwed to the keeper plate 130 wraps on the buccal or labial side, thereby securing the coupling force in the front-back direction. The keeper bottom part 120 has a keeper hole 140 at a proper position as a part to be fitted to the fitting recess 221 of the base 200. A female thread is formed in the keeper hole 140 so that the coupling bolt 350 may be fitted thereto. A bottom slope 121 is formed in the keeper bottom portion 120 to facilitate assembly with the base 200. Meanwhile, the keeper bottom part 120 may be provided in various forms depending on the shape and position of the loss part 430. As shown in FIG. 13, when the length of the keeper bottom part 120 varies according to the width of the loss part 430 and the loss part 430 is bent, a curved keeper bottom part 120 is employed. The keeper 100 is manufactured according to a conventional method of manufacturing a prosthesis, and casts using a carbon or ceramic casting bolt to form an accurate internal thread of the keeper hole 140. Detailed manufacturing methods will be described later.

Next, the base 200 of the prosthesis of the present invention will be described with reference to FIGS. 4 and 7. The base 200 is a portion surrounding the other abutment 420 on the lingual side. The base 200 includes a base plate 230 and a base rear wall 240 substantially surrounding the abutment 420 around the base wall 210. The base bottom portion 220 is formed at the bottom of the base wall 210. Base wall 210 is disposed in the loss portion 430 located between the abutment 410, 420 and the inner surface is manufactured to depict the undercut of the abutment 420 as it is. Basically, the base wall 210 is formed to have a degree of 2 to 4 degrees with respect to the vertical, so that it is not subjected to resistance in assembling the body 300 in any direction. As shown in FIG. 7, the base wall 210 is firmly fitted to the undercut of the abutment 420, and the prosthesis support force in the front-back direction and upward is excellent. The base rear wall 240 is a wall surface that supports the body main body 310 of the body 300 from the lingual side. On the other hand, the base bottom portion 220 has a fitting recess 221 to which the keeper bottom portion 120 is fitted. The fitting recess 221 covers the keeper bottom part 120 and supports it firmly. Since the keeper bottom part 120 is formed along the loss part 430, the rotational change of the keeper 100 and the base 200 is impossible due to the coupling with the fitting recess 221. In addition, a base hole 250 into which the coupling bolt 350 is fitted is formed in the base bottom portion 220 at a position corresponding to the keeper hole 140. The base hole 250 may be formed with a female thread as necessary to increase the screw coupling force. The size of the base bottom portion 220 is advantageously extended to the keeper wall 110 so that all the loss portion 430 can be covered, the keeper bottom portion 120 covered by the base bottom portion 220 is It is preferable to select suitably. The base 200 is also manufactured according to a conventional prosthetic manufacturing method including impression, wax up, casting, etc., but is manufactured by using carbon or ceramic casting bolts for accurate positioning of the base hole 250. . Detailed manufacturing methods will be described later.

Next, the structure of the body 300 of the present invention will be described in detail with reference to FIGS. 4 and 8. Body 300 is beautifully manufactured in consideration of the aesthetic aspect as a part that replaces the missing teeth. The body 300 is composed of a body body 310 and the occlusal portion 320 and the body plate 340 to form an occlusal surface in place of the lost tooth and the body body 310 is mounted on the base 200 is coupled. The body body 310 is manufactured according to a conventional prosthetic manufacturing method so as to fit snugly to all of the base bottom portion 220, the base rear wall 240, the base wall 210, and the keeper wall 110. The retaining pins 330 are manufactured so as not to be separated from each other between the occlusal portion 320 and the body body 310 when forming the occlusal portion 320 of the photopolymerized resin or ceramic material on the body body 310. The retaining pins 330 are preferably formed at the same time on the body body 310. One side of the body body 310 is provided with a body plate 340 surrounding the abutment 410 in the buccal side. While the body plate 340 wraps the abutment 410 at the buccal side, the keeper plate 130 and the base plate 230 which are screwed to the abutment wrap the abutment 410 and 420 at the lingual side, and thus the fixing force in the front and rear direction direction. This is doubled in addition to the cementing force. On the other hand, in the occlusal portion 320 and the body body 310 to form a coupling body hole 360 penetrating it so that the bolt 350 is screwed. Female threads are also formed in the body hole 360 so that the screw coupling force may be selectively increased.

FIG. 10 is an assembly view of four lossy anterior teeth of the present invention, wherein FIG. 10 (a) is a view seen from the lingual direction and FIG. 10 (b) is a view seen from the forward direction. The anterior portion means an incisor portion, the prosthesis of the present invention specified in the configuration is omitted the body plate 340 for the aesthetic effect when the anterior portion is lost, the body 300 is abutment (410, 420) Supported through the underkit on both sides of the keeper 100 and the base plate 230 are replaced and coupled by fastening the bolt 350.

A method of assembling the non-deleted prosthesis of the present invention will be described with reference to FIGS. 4 and 5. First, when the prosthesis arrives at the dentist, it confirms satisfactory bonding in the oral cavity, and prepares for cementing by cleaning the abutment according to a conventional method. After the preparation is completed, an adhesive such as dental resin is applied to the keeper wall 110 and the keeper plate 130 of the keeper 100 and adhered to one side preparation tooth 410. Since the keeper wall 110, the keeper plate 130, and the keeper bottom part 120 are manufactured to simulate the abutment teeth 410 and the loss part 430 as they are, close adhesion is possible. Next, the base 200 is cemented to the other abutment 420. The cementing method is the same as before. Since the base wall 210, the base bottom portion 220, and the base plate 230 of the base 200 are manufactured to simulate the abutment 420, the loss portion 430, and the keeper bottom portion 120, the close adhesion is achieved. It is possible. In addition, since the keeper 100 and the base 200 are manufactured to be correctly fitted in accordance with a casting method to be described later, the keeper hole 140 and the base hole 250 for screwing coincide with each other. Next, the body 300 is assembled on the base 200. The adhesive is applied to the body plate 340 and the abutment 410 is wrapped around the labial side. Since the body 300 is also manufactured to simulate the entire base 200 as it is, close adhesion is possible. In this case, the body hole 360 may be screwed to match the keeper hole 140 and the base hole 250 exactly. Next, the bolt 350 made of stainless steel or titanium is fastened through the body hole 360, the keeper hole 140, and the base hole 250, and the bolt entrance hole is finished with a photopolymerized resin, thereby completing the work.

As described above, since the prosthesis is divided into three parts, the removal of the abutment teeth 410 and 420 is unnecessary, and thus, inconvenience and pain and secondary problems of the patient can be minimized. In addition, the assembly accuracy and adhesion are significantly improved as compared to the fitting prosthesis in a manner of screwing together with the usual cementing. As the assembly accuracy is improved, the natural occlusion sense can be maintained, and the working time for the dentist to smooth the occlusal sense can be minimized.

Next, a method of manufacturing the non-deleted prosthesis of the present invention will be described with reference to FIGS. 11 to 15. Typically, the manufacturing process of the prosthesis is to go through the impression process, the working cast (working cast) manufacturing process, wax-up process, investment process, summon process, casting process. The manufacturing method of the present invention is also similar, but it can be said that the use of carbon or ceramic casting bolts in order to manufacture the correct screw coupling holes.

First, the refractory model 500 is replicated using a main model (stone model) generated by duplicating the oral cavity of a patient. Next, the plastic pattern corresponding to the keeper wall 110 is attached to the abutment 510 of the fire resistant model 500 by wax, and the surroundings are finished with wax. To form a keeper of complete shape. At this time, since the plastic holder 610 is integrally attached to the plastic pattern, the holder 610 may be inserted into the parallel measuring device 600 and then moved to the correct position. When the attachment of the plastic pattern is completed, the holder 610 is cut, and the keeper plate 130 is engraved using a 24-gauge sheet wax to connect with the keeper wall 110. Next, a plastic pattern corresponding to the keeper bottom part 120 is attached as shown in FIG. 11. The plastic holder 610 is integrally formed in the plastic pattern so that the attaching operation is simple. The plastic pattern corresponding to the keeper bottom part 120 may be provided in various forms as shown in FIG. 13 according to the size and shape of the tooth loss part 530 and should be appropriately selected. After all of the plastic patterns corresponding to the keeper wall 110, the keeper plate 130, and the keeper bottom 120 are attached to the replicated fireproof model, the carbon or ceramic casting bolt 620 as shown in FIG. 12 is attached. Perform the used work. The work using the casting bolt 620 is a process for forming the screw coupling hole, that is, the keeper hole 140, the base hole 250 and the body hole 360, etc. to exactly match each other at the correct position. An important part of the threaded prosthesis of the invention. The shape of a concrete casting bolt 620 is shown in FIG. 16. Work using the bolt also proceeds by using the parallel measuring device 600 for accurate positioning. Insert the casting bolt 620 in the parallel measuring device 600 and move it to the position where the keeper hole 140 is to be formed, and then fill it with wax, and then sprues in a proper position, for example, a keeper wall ( It is attached between 110 and the keeper plate 130 and the like, buried and summoned with the same material as the duplicated fireproof model, and primary casting is performed. In this way, the keeper 100 provided with a female thread is completed by primary casting. When the keeper manufacturing step is described in more detail step by step, first, the keeper plate engraved using the keeper wall, the plastic pattern corresponding to the keeper bottom part and the sheet wax and the sheet wax are attached with inlay wax, and the parallel measuring instrument Fix the carbon or ceramic casting bolt to the position where the keeper hole is to be formed, and fill the plastic pattern and the casting bolt around the casting bolt with wax to form the overall shape of the keeper, and then to one side of the overall shape of the keeper The sprues are connected and placed, summoned and buried with the same material as the refractory model as a buried material, followed by a casting step of casting through the mains secured by the sprues.

Next, the fabrication of the base 200 by secondary casting will be described. Since the keeper hole 140 is formed in the keeper 100 manufactured by the primary casting, it is important to form the base hole 250 to exactly match the keeper hole 140. In order to achieve the desired purpose, in the present invention, the replica bolt 630 and the casting bolt 620 shown in FIG. 16 are used again. The replication bolt 630 is inserted into the keeper hole 140 of the keeper 100 made of metal as shown in FIG. 14, and then the entire replication is performed with a silicon impression material. At this time, only the replica material injection instruction region 631 shown in FIG. 16 is injected and cured. When the curing is completed by turning the replication bolt 630 by using a hexagon wrench to remove it, and then insert the casting bolt 620 in this position in accordance with the position indicating portion 621 and inject the investment material. When the curing of the investment material is completed and separated from it, the casting bolt 620 is positioned at the same position as the replication bolt 630 on the investment material replication model, and preparation for manufacturing the secondary structure is completed. At this time, the replication bolt 630 is formed with a position selector 632 for indicating the position, the casting bolt 620, when inserted into the inner surface of the impression, the replication bolt 630 Position guidance unit 622 is formed to guide to the position where there was.

Next, the base 200 is sculpted as shown in FIG. 15. That is, the keeper 100 is included in the previous step, and the base wall 210 and the base bottom portion 220 are attached to each other using a plastic pattern on the buried material reproduction model replicated with wax, and the base plate 230 is attached. After engraving using sheet wax, the periphery is filled with wax to form a base of perfect shape. In this case, the shape of the base wall 210 is opposite to the keeper wall 110 and faces the duplicate keeper wall 110. Since the working method is the same as the keeper wall 110, it is omitted. Cut the plastic pattern corresponding to the base bottom portion 220 to the width and length, then drill a hole at the position where the base hole 250 is to be formed, and accurately position it using the holder 610 attached to the plastic pattern. Join with wax. Closure of the gap between the buried buried material keeper 100 and the void and the casting bolt 620 hole. The base rear wall 240 and the base plate 230 are also carved in the same manner. Since the description is the same as before, it is omitted. Next, after cutting and trimming all plastic patterns to match the length and width, the base 200 is cast through a secondary casting process through investment, summon casting, and the like. The step of manufacturing the base in more detail step by step, first to place the completed keeper in the refractory model, implant the replication bolt in the keeper hole of the keeper, and the main model, the keeper, and the implanted replication bolt After the impression material is hardened and the impression material is cured, the main model, the keeper, and the bolts for replication are removed, and carbon or ceramic casting bolts are implanted in the place where the bolts for removal are removed, and a buried material is injected into the impression body. The base wall, base bottom, and base plate are carved into the investment material model, sprues are connected and placed on one side of the overall shape of the base, and the material same as the fireproof model is then invested into the investment material. The casting step is performed through the main hole secured by the sprue.

Next, the manufacturing process of the body 300 of the present invention will be described with reference to FIG. The keeper 100 and base 200, which have already been cast on the main model, are placed and locked with the replica bolt 630 of FIG. Similar to the secondary casting process, after replicating using a silicon impression material, the casting bolt 620 is inserted in the same manner as before to inject a buried material to produce a third replica model. The free wax up method is used to engrave the structure on which the loss value is to be formed on the third replica model. In this case, the occlusal portion 320 forming the occlusal surface may selectively employ a metal occlusal surface, a photopolymerized occlusal surface, a porcelain occlusal surface, and the like, and follow the conventional pore method, but the replication bolt 630 may be filled. Ensure the body hole 360. The body plate 340 is sculpted with 24 gauge wax, and the periphery of the body plate is sculpted using inlay wax to form a complete body shape. Next, sprues are implanted to be connected to one side of the body shape, and investment and casting are performed. After casting, finish the metal occlusal surface as it is, and in the case of resin or porcelain occlusal surface, complete the occlusal surface with resin or ceramic. When the tertiary casting process is completed by the above-described method, the keeper hole 140, the base hole 250, and the body hole 360 may be exactly matched with each other. As the casting bolts 620 and the replica bolts 630, which are specially manufactured as shown in FIG. 16, are alternately used to make each female casting process, accurate female screws can be manufactured. To provide comfortable prostheses. The advantages as described above can be said to be a breakthrough compared to the disadvantages of conventional fits (see FIG. 3) prostheses. When explaining the step of manufacturing the body in more detail step by step, first place the completed keeper and the base in the refractory model and implant the replication bolt in the coupling hole of the keeper and the base, the main model, keeper, base, And duplicating the replication bolt with the impression material, removing the main model, the keeper, the base, and the replication bolt after curing the impression material, and implanting the casting bolt 620 in the place where the replication bolt is removed, The entire body shape is sculpted by inlay wax into the investment material model formed by injecting the investment material into the inner surface, and the sprue is connected and placed on one side of the overall body shape, and then the same material as the fireproof model is used as investment material. After burying and then summoned, it is finally subjected to a casting step of casting through the mains secured by the sprue.

Second Embodiment

Next, a second embodiment of the non-deleted prosthesis of the present invention will be described with reference to FIGS. 17 and 23. The second embodiment is the same as the first embodiment except that various types of keeper grooves 123 are formed in the keeper bottom portion 120 of the keeper 100. As the keeper 100 and the base 200 are fitted with the fitting recesses 221 of the sectional shape of the keeper bottom portion 120 and the base bottom portion 220, there is no possibility of relative movement. However, in the case of FIG. 9 where two or more loss values exist, there is a possibility that the bonding force is lowered. Therefore, in the second exemplary embodiment of the present invention, as shown in FIG. 17, the keeper groove 123 having various shapes is formed on the bottom slope 121 of the keeper bottom part 120. At this time, it is natural that the fitting protrusion 222 is formed on the inclined surface of the fitting recess 221 of the base 200 to be engaged with the keeper groove 123. It is also important that there is no undercut when forming the keeper groove 123 and the fitting protrusion 222.

(Third Embodiment)

Next, a third embodiment will be described with reference to FIG. As shown in FIG. 18, the third embodiment is the same as the first embodiment except that the positioning portions and the position reproducing portions of the replica bolt 630 and the casting bolt 620 are designed differently. The simple and wide portions of the replica bolt 630 and the casting bolt 620 facilitate location reproducing, and high precision bolts can be manufactured.

(Example 4)

Next, a fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment relates to a manufacturing method which can obtain the same non-deleted prosthesis without the casting bolt 620. It is the same as the casting process of 1st Example except the characteristic demonstrated below. The processes described with reference to FIGS. 11 to 14 proceed in the same way. The replication bolt 630 is equally inserted into the keeper hole 140 of the keeper 100 firstly casted on the production extension line of the replica model for the second casting, and then the same is replicated using the impression material. Next, instead of removing the replication bolt 630 and positioning the casting bolt 620, the casting investment material is injected into the entire space including the space where the replication bolt 630 was, and then the same including the upper part of the replication bolt. The fireproof model is obtained and then waxed and then buried and cast. Also in the formation of the body 300 through the tertiary casting, one casting bolt 620 can be saved in the same manner. That is, the keeper 100 and the base 200 produced by the primary and secondary castings are filled with the replica bolts 630, and the replicas are made by using the impression material, and then the third casting is performed by directly adding the investment agent. However, in the fourth embodiment, the casting bolt 620 is excluded and direct casting by the investment material is performed. Therefore, in order to prevent the fracture in the form of bolts, it is necessary to employ the calibration wire 640 as shown in FIG. 19 (b). Do. The calibration wire 640 is bent round the end so as not to fall into the hole, and then the investment material is injected.

Next, it will be described that the female screw for the fastening bolt 350 is formed in the keeper hole 140, the base hole 250, and the body hole 360 in FIGS. 20, 21, and 22. 20 shows that the keeper hole 140, the base hole 250 and the body hole 360 are all formed with a female screw to be coupled with the fastening bolt 350, and FIG. 21 shows the keeper hole 140 and the base hole. A female screw is formed on the 250 to be coupled using the fastening bolt 350 to facilitate the coupling. FIG. 22 forms a female thread in the keeper hole 140 and forms an inclined surface in which the lower surface of the head of the fastening bolt 350 is in close contact with the body hole 360 to be coupled using the fastening bolt 350. Female threads formed on the inner surfaces of the keeper hole 140, the base hole 250, and the body hole 360 are the same as the fastening bolt 350 when casting the keeper 100, the base 200, and the body 300. It is automatically formed by using a ceramic bolt in the shape.

On the other hand, the coupling bolt 350 is used to produce the same shape as the portion corresponding to the actual prosthetic coupling portion of the replica bolt 630 or casting bolt 620 used. In addition, the replication bolt 630 may be used titanium and stainless steel bolts, the casting bolt 620 may be used for carbon and ceramic casting bolts.

Next, a fifth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 23, the fifth embodiment is the same as the first embodiment except that the rear walls of the keeper 100 and the base 200 are omitted. By omitting the rear wall of the base 200, the body 300 surrounds the entire bottom surface of the base 200, prevents the flow of the base 200 of the base 200, and improves the bonding force.

1 is a configuration diagram of a conventional crown bridge prosthesis.

Figure 2 is a configuration diagram of a conventional inlay prosthesis.

Figure 3 is a conventional fitting prosthesis configuration.

4 is an overall perspective view of the present invention.

Figure 5 is an assembled view of one loss posterior surface of the present invention.

6 is a keeper buccal side view of the present invention.

7 is a front view of the base buccal cavity of the present invention.

Figure 8 is a body lingual rear view of the present invention.

9 is an assembled view of the two loss posterior surface of the present invention.

10 is an assembly view of four lost anterior teeth of the present invention.

11 is an explanatory view of the plastic keeper for the primary casting of the present invention.

Figure 12 is an explanatory view of the casting bolt positioning operation for forming the keeper female thread through the primary casting of the present invention.

13 is a top view illustrating various keeper bottom shapes.

14 is an explanatory diagram of a replication model for secondary casting.

Figure 15 is a working model of the replication model for the third casting.

16 is a side view for replication and casting bolts.

Fig. 17 is an explanatory diagram of a keeper bottom part of the second embodiment of the present invention;

Figure 18 is a side view of the replication and casting bolt of the third embodiment of the present invention.

19 is an explanatory view of the replica work for secondary casting of the fourth embodiment of the present invention.

20 is a side view of the female thread formed in the keeper hole, the base hole and the body hole of the present invention.

Figure 21 is a side view of the female thread formed in the keeper hole and the base hole of the present invention.

Figure 22 is a side view of the female thread formed in the keeper hole of the present invention.

Fig. 23 is an overall perspective view of a fifth embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

100: keeper 110: keeper wall

120: keeper bottom 130: keeper plate

140: keeper hole 200: base

210: base wall 220: base bottom

230: base plate 250: base hole

300: body 310: body

320: occlusal portion 350: bolt

Claims (2)

In the method for manufacturing a dental prosthesis consisting of a lower body and an upper body, Carbon casting bolts or ceramic casting bolts are placed on the fireproof model that duplicates the main model, the lower body is carved with wax, and a main body is formed on one side of the wax carved lower body to cast the lower body having a female thread formed thereon. Steps, A replica bolt, which is a replica of the carbon casting bolt or ceramic casting bolt, is placed on the female screw portion of the lower body including the female thread, mounted on the main model, and then the impression body is duplicated using a silicone impression material. After removing the replication bolt from the sieve, insert the carbon casting bolt or ceramic casting bolt in the place where the replication bolt is removed and inject the casting investment material to produce a fireproof model, and the upper body is waxed to the fireproof model. A method of manufacturing a dental prosthesis, comprising: sculpting, and forming a main body on one side of the upper body sculpted with wax to cast the upper body with a female screw. delete

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