KR102198862B1 - Manufacturing method of using Porcelain Fused Metal crowns manufactured with digital technology - Google Patents

Abstract

The present invention relates to a digital technology-based PFM crown and a manufacturing method thereof, which not only secure the precision of a product by molding and manufacturing copings and prostheses for the impression information of a patient based on a digital milling machine or 3D printer but also overcome the limitations of treatment technology by proposing various coping methods such as single or bridge, etc. depending on the patient′s dental condition. In addition, due to a library method of a design program, the speed and convenience of manufacturing are actively improved by systematically managing coping modeling information. The method comprises: an impression taking process (S100) of acquiring impression information from the patient′s oral cavity; a coping modeling process (S200) of performing single coping modeling installed on a single tooth or bridge coping modeling installed on a plurality of teeth using a 3D modeling program based on the impression information; a prosthesis modeling process (S300) of modeling a prosthesis using the 3D modeling program based on the impression information and coating modeling information; a coping processing process (S400) of molding a soft metal according to the coping modeling information using a CAD/CAM system and sintering the soft metal at a set temperature; a prosthesis processing process (S500) of molding a ceramic material according to the prosthesis modeling information using the CAD/CAM system; a coping installation process (S600) of installing the molded coping in the patient′s oral cavity; and a prosthesis installation process (S700) of bonding the prosthesis after applying a dental adhesive to the coping surface.

Description

PFM crown based on digital technology and manufacturing method thereof {Manufacturing method of using Porcelain Fused Metal crowns manufactured with digital technology}

The present invention is disclosed with respect to a crown that replaces a patient's missing tooth with an artificial tooth and restores the function to the same level as a natural tooth, and a method of manufacturing the same, and in more detail, the patient is based on a digital milling machine or a 3D printer. Coping for impression information and prosthesis are molded and produced to ensure product precision, and various coping methods such as single or bridge are proposed according to the patient's tooth condition to overcome the limitations of treatment technology, and a library method of design programs The present invention relates to a digital technology-based PFM crown and a method of manufacturing the same, in which the speed and convenience of manufacturing are actively improved by systematically managing coping modeling information.

In general, in the field of dentistry, an implant refers to implantation of an artificial tooth, and the implant restores the function of the existing tooth by placing an artificial tooth root made of ceramic material that does not have a rejection reaction to the human body and attaching it to the lost alveolar bone.

Existing implants made coping bodies and prostheses based on the tooth model produced from the impression information obtained from the patient's oral cavity. In particular, the quality deteriorated as ceramic materials were repeatedly laminated or sintered to realize the color development of natural teeth. Of course, various problems such as decreased productivity were caused.

On the other hand, as an example of the technology examples of implants that have been practiced in the past, Patent Publication No. 10-1496080 "Method of manufacturing dental instruments" is described.

The technology includes an impression-taking step of obtaining an impression of the same negative shape as the oral cavity using an impression material, a modeling step of producing a tooth model that reproduces the oral cavity in a positive shape by injecting gypsum into the impression body, and the tooth model. The pin working step of placing the pin, the basing step of forming the base gypsum part on the tooth model, and the damaged tooth part of the tooth model is separated from the base gypsum rotor by forming a partial tooth model by cutting a boundary between the tooth and the tooth. The base to present one reference line while covering the sawing step to enable, the mounting step of attaching the tooth model to the articulator, and the optical line of sight formed by the tooth model and the partial tooth model to cause an optical illusion to the operator. Attaching a guide member marked with a reference line to the gypsum part, a waxing step of waxing an intact tooth shape with wax to the partial tooth model and the tooth model, and assembling the partial tooth model and the tooth model to the base plaster part. Afterwards, the first inspection step of checking the occlusal state with reference to the reference line marked on the guide member to check for errors in the waxing step, and the wax is separated from the waxed-up partial tooth model and the tooth model, buried with an investment material, and a negative shape is made. A metal coping step of manufacturing a metal coping body by melting and injecting metal into the negative mold to make a positive dental prosthesis model and cutting to enable ceramic material construction, and a guide member after assembling the metal coping body to the partial tooth model and the tooth model. The second inspection step of checking the occlusal state with reference to the reference line indicated in the metal coping body to check the error of the metal coping body, the porcelain layering step of placing a ceramic material on the metal coping body and baking it at a high temperature to create a dental pore, and the dental technician Contouring step of processing water to reproduce the surface like natural teeth, and a third inspection step of assembling the dental work to a partial tooth model and a tooth model and checking errors in the dental work while referring to the reference line marked on the guide member And it consists of a glazing step of baking the dental pore at high temperature to give a gloss.

In this way, conventionally, a tooth model was produced based on the impression information obtained from the patient's oral cavity, and then the coping body and the prosthesis were produced through the plasticizing process, and the coping body and the prosthesis were combined with the patient's oral cavity. . In particular, the process of repeatedly laminating and sintering ceramic materials several times in order to achieve the same level of color development effect as the natural teeth on the coping body or the prosthesis, and it can be seen that many problems occurred in the quality and productivity of the product. .

Accordingly, there is a need for a PFM crown and a manufacturing method thereof that can produce high-quality products while simplifying the procedure and improving productivity.

Korean Registered Patent Publication No. 10-1496080 "Method of manufacturing dental instruments"

The present invention has been created in order to more actively solve the above problems, and a tooth model is produced based on the impression information obtained from the patient's oral cavity, and a coping body and a prosthesis are separately produced based on the tooth model. Departing from the existing method where satisfactory quality and productivity could not be expected compared to the working method, a precise product is produced quickly by forming a coping and prosthesis for the patient's impression information based on a digital milling machine or 3D printer. The main task is to provide technology that can realize color development similar to that of natural teeth.

In addition, the present invention proposes a customized procedure according to various symptoms of the patient, such as the patient's oral condition or impression information, so that both the patient and the operator can provide a more comfortable operating environment while minimizing the burden caused by the procedure.

In addition, the present invention simplifies the process by constructing a separate system that can quickly process coping and prosthesis modeling, or coping and prosthesis processing, thereby creating a more comfortable dental treatment environment.

In order to achieve the above-described problem, the digital technology-based PFM crown and its manufacturing method proposed by the present invention are as follows.

The present invention is an impression acquisition process (S100) for obtaining impression information from the patient's oral cavity; and, based on the impression information, a single coping modeling installed on a single tooth using a 3D modeling program or a bridge coping modeling installed on a plurality of teeth The coping modeling process (S200) is performed; And, a prosthesis modeling process (S300) of modeling a prosthesis using a 3D modeling program based on impression information and coating modeling information; And, a soft metal is used using a CAD/CAM system. A coping processing process (S400) of forming according to the coping modeling information and sintering at a set temperature; and, a prosthesis processing process (S500) of forming a ceramic material according to the prosthesis modeling information using a CAD/CAM system; and, It characterized in that it consists of a coping installation process (S600) of installing the coping in the oral cavity of the patient; and a prosthesis installation process (S700) of bonding the prosthesis after applying a dental adhesive to the coping surface.

In addition, the single coping modeling may include partial coping modeling installed in a partial region of the tooth according to the shape of the prepared tooth; Or the entire coping model installed on the front of the tooth; characterized in that it consists of.

In addition, the bridge coping modeling may include link bridge coping modeling for fastening a prosthesis by coping each tooth prepared on both sides based on the lost tooth; Or, it is characterized in that it consists of; three bridge coping modeling for fastening the prosthesis by connecting the lost tooth and all peripheral teeth by coping.

In addition, in the coping modeling process (S200), modeling is performed using a library-based storage module provided by a design program, but the storage module stores the self-produced coping reference modeling and the coping modeling information worked by the operator. It is divided into sets according to and stored, and a systematic work environment of coping modeling is created by inducing reading or editing of the stored modeling by selecting a tooth number during work.

In addition, the dental adhesive is a resin cement (Resin cement) in which adhesion is induced by self-adhesive or photopolymerization; Or ceramic cement (Ceramic cement) in which adhesion is induced by heat treatment; characterized in that it consists of.

In addition, the prosthesis installation process (S700) comprises an adhesive manufacturing step (S710) of forming a resin cement; and an adhesive layer forming step (S720) of applying or repairing the adhesive to the teeth and the coping being prepared for the procedure (S720); And, due to the adhesive layer The prosthesis bonding step (S730) for placing the prosthesis; And, the prosthesis fixing step (S740) of fixing the prosthesis by irradiating the upper surface, the lingual surface, and the buccal surface of the adhesive layer with blue light several times for 1 to 2 seconds; characterized in that it consists of To do.

In addition, the prosthesis installation step (S700) includes an adhesive manufacturing step (S710) of forming a ceramic cement; and an adhesive layer forming step (S720) of applying the adhesive to the teeth and the coping surface being prepared for the procedure (S720); And, the prosthesis due to the adhesive layer A prosthesis bonding step (S730) of disposing a; And, a prosthesis fixing step (S740) of fixing the prosthesis by heat treating the adhesive layer at 800 to 1000°C.

On the other hand, the implant structure proposed by the present invention is made of a soft metal material, and is provided in a form corresponding to the patient's roots or crowns by a 3D modeling program, so that a single or a bridge or three bridges coping on the defective area of the patient The coping layer 10 installed in any one of the methods; And, the dental adhesive layer 20 applied on the entire surface of the coping layer; And, made of a ceramic material, the loss of the patient by using a digital milling machine or a 3D printer. It is provided in a shape corresponding to the tooth, and is characterized by consisting of; a prosthesis 30 bonded to the coping layer by a dental adhesive layer.

According to the present invention consisting of the above-described configuration, by coping for the patient's impression information and shaping the prosthesis based on a digital milling machine or a 3D printer, the rapidity, convenience, and precision of product manufacturing are secured to provide a high-quality PFM crown. It can have an effect.

In addition, the present invention has another effect of actively blocking an error in color development due to color overlap on the bonding surface of the coping body and the prosthesis by using an opaque dental adhesive similar to that of natural teeth.

In addition, the present invention provides a single coping method or a bridge coping method according to the configuration of a patient's lost tooth, in particular, the single coping method provides a full or partial coping method according to the shape of the cut tooth, and the bridge coping method is Depending on the remaining composition of the tooth, the link bridge coping method or the three bridge coping method is provided to provide another effect that can treat patients with various conditions.

In addition, the present invention has another effect of providing speed and convenience of work by collecting and storing a large amount of coping modeling information using a storage module of a design program, and managing it based on a library according to tooth number or coping modeling.

1 is a cross-sectional view of a PFM crown installed according to the single coping method of the present invention.
Figure 2 is a cross-sectional view of a PFM crown installed according to the bridge coping method of the present invention.
3 is a flowchart listing a method of manufacturing a PFM crown configured according to a preferred embodiment of the present invention by order of process.

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention, and actions and effects thereof will be described collectively.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to embodiments described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms. However, this embodiment allows the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. In addition, the same reference numerals refer to the same elements throughout the entire specification.

The present invention relates to a PFM crown that replaces a patient's missing tooth with an artificial tooth and restores the function to the same level as a natural tooth, and a method of manufacturing the same.

Above all, the present invention not only secures the precision of the product by molding and manufacturing a prosthesis and coping for the patient's impression information based on a digital milling machine or a 3D printer, but also various coping methods such as single or bridge depending on the patient's tooth condition. It has been proposed that it is related to digital technology-based PFM crown and its manufacturing method, which overcomes the limitations of treatment technology and systematically manages coping modeling information due to the library method of the design program, thereby actively improving the speed and convenience of manufacturing. Please note.

Prior to the description of the present invention, the PFM is an abbreviation of Porcelain Fused Metal, which means a dental implant made of a ceramic material on the outside and a metal material on the inside.

1 is a cross-sectional view of a PFM crown installed according to a single coping method of the present invention, FIG. 2 is a cross-sectional view of a PFM crown installed according to a bridge coping method of the present invention, and FIG. 3 is a PFM constructed according to a preferred embodiment of the present invention. As a flow chart listing a method of manufacturing a crown by order of processes, the present invention will be described based on the drawings.

The present invention provides an impression acquisition process (S100) for obtaining impression information from the patient's oral cavity; and a coping modeling process (S200) for modeling coping using a 3D modeling program based on the impression information; And, impression information and coating modeling A prosthesis modeling process (S300) for modeling a prosthesis using a 3D modeling program based on information; and a coping process in which a soft metal is molded according to the coping modeling information using a CAD/CAM system and sintered at a set temperature. (S400); And, a prosthesis processing process (S500) of forming a ceramic material according to the prosthesis modeling information using a CAD/CAM system; And, A coping installation process (S600) of installing the formed coping in the oral cavity of the patient; And , Prosthesis installation step (S700) of bonding the prosthesis after applying a dental adhesive to the coping surface; consists of.

The impression-taking process (S100) is a process for acquiring an impression object of a tooth lost in the patient's oral cavity, that is, an area requiring a procedure. In the past, the patient bites the impression material into the mouth to form an intaglio corresponding to the tooth, and then raises it. It was consistent by waiting for the material to harden. Currently, impression information can be easily obtained by using digital technologies such as dental oral scanners, 3D modeling programs, and 3D printers.

The present invention utilizes a method of obtaining impression information due to digital technology.

When an impression is obtained using the dental oral scanner, more precise impression information can be obtained quickly compared to the impression material, so various advantages such as reduction in defect rate, improvement in quality, and increase in productivity can be expected. You do not need to put the impression material in your mouth so that you can create a more comfortable treatment environment.

The coping modeling process (S200) is a process of reading impression information with a dental 3D modeling program, and modeling coping applicable to the patient's preped teeth based on the read information. In the coping modeling process (S200), modeling is performed after selecting either a single coping or a bridge coping in consideration of all of the patient's condition, such as the patient's oral condition, the tooth removal condition, and the location of the lost tooth, and the working environment and atmosphere. Conduct.

The single coping modeling is to provide a coping that can be applied to a single tooth, and the bridge coping modeling is to provide a coping that can be applied to a plurality of teeth. For example, if there is a single tooth that requires a procedure and the shape of the tooth is preserved at a level that can be directly operated on, a single coping can be attempted.On the other hand, if there are multiple teeth requiring treatment or a direct procedure on the tooth is impossible. If damaged or removed, bridge coping can be attempted using peripheral teeth placed close to the tooth.

Meanwhile, the single coping modeling is classified into partial coping modeling or full coping modeling according to the shape of the prepared tooth.

The total coping modeling is a process of modeling a coping that can be installed when a tooth is completely removed and a space sufficient for coping and a prosthesis is secured on the front surface.

The partial coping modeling is a process of modeling a coping that can be installed only in the deleted area when the installation space of the coping and the prosthesis is limited for each section as the tooth is partially removed.

The bridge coping modeling models the coping corresponding to the condition so that a plurality of teeth located close to each other can be treated, or when individual coping is impossible because the teeth required for treatment are severely damaged or completely removed. It is a process to do.

The bridge coping modeling includes a peripheral tooth, that is, a coupling part 11 installed on a tooth located closest to both sides of a lost tooth; And a filling portion 12 extending from the coupling portion to fill the space installed or removed in the lost tooth, and the bridge coping modeling is divided into link bridge coping modeling and three bridge coping modeling depending on the presence or absence of the filling portion. do.

In the link bridge coping modeling, coupling portions 11 are installed on the teeth disposed on both left and right sides based on the gum from which the teeth have been completely removed, and the coupling portions as shown in FIG. 2 cause the teeth to be removed, including the surrounding teeth. A plurality of corresponding prostheses are integrally formed and installed.

In the three bridge coping modeling, when a plurality of teeth arranged side by side as shown in FIG. 2 are all deleted to the same level, the coupling part and the filling part are laminated and installed on top of the corresponding teeth to allow the prosthesis to be combined.

In addition, it will be natural that the bridge coping modeling can be partially coping if there is no room in the installation space of the coping according to the tooth removal condition, as in the single coping modeling.

The prosthesis modeling process (S300) is a process of modeling a prosthesis using a 3D modeling program based on impression information and the coating modeling information.

In the prosthesis modeling process (S300), a defect area identification step (S310) of confirming a defect area and a coping state based on the scanned impression information and coping modeling information, and a prosthesis modeling a prosthesis by predicting the surrounding teeth and the defective or deleted teeth. The procedure is divided into a prosthesis modeling step (S320) and a virtual installation step (S330) in which the modeled prosthesis is virtually combined with coping to check for errors through simulation.

As described above, in the prosthesis modeling process (S300), a prosthesis is produced based on impression information and coping modeling information, and in particular, by virtually performing assembly or treatment using the produced prosthesis modeling information, the shape of the product as well as the combination can occur. It provides a safer and more comfortable treatment environment for patients by minimizing the problem of various errors.

Meanwhile, the coping modeling information and prosthesis modeling information produced by the coping modeling process S200 and the prosthesis modeling process S300 are collectively stored and managed in a storage module provided by a dental design program or a 3D modeling program.

The storage module provides speed and convenience of work by storing and managing copings and prostheses based on a library based on tooth numbers according to international standards.

In general, a dental procedure-related library is divided into items that select one digital abutment, the type of tooth, the diameter or length of the abutment according to the implant placement position, and the separated digital abutment is managed including a set. System. The digital abutment managed as a set as described above can be easily viewed or edited to produce modeling by setting a selection item to correspond to a fixture and an oral cavity.

The library of the present invention can manage copings and prostheses in addition to the digital abutments. Like the digital abutment management method, the coping and the prosthesis are divided into sets according to the type of tooth to be installed (the tooth number according to the international standard), and the type of the coping (single or bridge).

In the case of management using the library as described above, the abutment, coping body, and prosthesis required for the procedure can be immediately viewed and modeling or processing can be attempted, significantly reducing the time required for modeling or processing. Thus, economic feasibility can be secured according to cost reduction.

The coping processing step (S400) is a process of forming a soft metal according to coping modeling information using a CAD/CAM system and sintering at a set temperature. In addition, the prosthesis processing process (S500) is a process of forming a ceramic material according to prosthesis modeling information using a CAD/CAM system.

The coping processing process (S400) is formed using a 3D printer or a CAD/CAM system, and in detail, a coping material arrangement step (S410) of placing a soft metal used for dental treatment into the CAD/CAM system, and The coping modeling input step (S420) of transmitting or inputting the produced coping modeling information to the CAD/CAM system, the coping forming step (S430) of forming a soft metal based on the input modeling information, and the formed coping are performed. It consists of a coping sintering step (S440) of sintering at a predetermined temperature to improve hardness.

Since the coping body produced using the CAD/CAM system as described above is processed based on the information that has been reviewed until the virtual installation, it has a very sophisticated quality compared to the previous one, and the patient's tooth loss area and prosthesis The occlusion is elaborate.

The prosthesis processing step (S500) is a process of forming a ceramic material based on prosthesis modeling information, and in detail, a prosthesis material placement step (S510) of arranging a ceramic material in a CAD/CAM system, and CAD/ It consists of a prosthesis modeling input step (S520) of transmitting or inputting to the CAM system, and a prosthesis shaping step (S530) of forming a ceramic material based on the input modeling information.

Here, the material of the prosthesis is zirconia having a color gradient by applying a coloring liquid, and for example, the zirconia is a zirconia powder in which at least one powder corresponding to the color code of the shade guide is mixed into an electric furnace and melted for each color. The resulting ceramic solution is poured into a mold in the order of dark color, pressurized to form a block, and then sintered to remove impurities. The zirconia powder is prepared in the colors of B4, B3, and A1 based on the shade guide sample, but the ceramic powder melted from the electric furnace is injected in the order of colors B4, B3, and A1 to have a color gradient, and each color gradient Zirconia with is managed as a set in the library of the design program mentioned above.

In the coping installation process S600, as mentioned in the coping modeling process S200, due to the structure of the patient's lost teeth, a single installation or a bridge is installed.

The single coping is a coping method for treating a single tooth, and the bridge coping is a coping method for treating a plurality of teeth at once. For example, if there is a single tooth that requires a procedure and the shape is preserved to the level that can be directly operated on the tooth, a single coping is attempted.On the other hand, there are multiple teeth that require treatment, or the tooth is damaged to the extent that direct treatment is impossible. If the pores are removed, try bridge coping using the surrounding teeth.

Here, the single coping is divided into partial coping and full coping according to the shape of the prepared tooth.

The entire coping is a coping method that can be applied when the entire tooth is removed so that a sufficient space for coping and prosthesis is secured on the front surface of the tooth, and the partial coping is a coping method that only removes the corresponding part because the tooth is damaged locally. According to this method, when the space in which the coping can be installed is limited, only the deleted part is coping. The detailed configuration of the partial coping will be easy with reference to the drawings.

The bridge coping is a method in which a plurality of teeth located adjacent to each other are treated, or when a tooth requiring treatment is severely damaged or completely removed so that individual coping is not possible, the bridge coping is installed by connecting with surrounding teeth.

The bridge coping is a peripheral tooth, that is, a coupling portion installed on the teeth located closest to both sides of the lost tooth; And a filling portion extending from the coupling portion to fill the space installed or removed in the lost tooth, wherein the bridge coping is divided into a link bridge coping and a three-bone bridge coping depending on the presence or absence of the filling portion.

In the link bridge coping, coupling portions 11 are installed on each tooth disposed on both left and right sides based on the gum from which the tooth has been completely removed, and the coupling portion is integrally formed so as to correspond to the tooth from which the tooth has been removed. It is made by combining a plurality of prostheses. In the three bridge copings, when a plurality of teeth arranged side by side as shown in the drawing are all deleted to the same level, a coupling part and a filling part are laminated and installed on top of the corresponding teeth, so that the prosthesis is combined.

In addition, it will be natural that the bridge coping can be partially coping if there is no room in the installation space of the coping according to the condition of tooth removal, like a single coping.

The prosthesis installation process (S700) is a process of bonding the prosthesis after applying a dental adhesive to the coping surface, and bonding is performed in a somewhat different manner according to the type of the dental adhesive.

The present invention proposes a ceramic cement bonding method that is bonded by high-temperature heat treatment as a dental adhesive and a resin cement bonding method that is bonded by natural polymerization or photopolymerization.

The prosthesis installation process (S700) using the ceramic cement bonding method includes an adhesive manufacturing step (S710) of forming a ceramic cement; and an adhesive layer forming step (S720) of applying the adhesive to the teeth and the coping surface being prepared for the procedure (S720); And, The prosthesis bonding step (S730) of disposing the prosthesis due to the adhesive layer; And, the prosthesis fixing step (S740) of fixing the prosthesis by heat treating the adhesive layer at 800 to 1000°C.

In the case of bonding by heat treatment using ceramic cement as described above, it is possible to actively prevent wash out by saliva secreted from the salivary glands, thereby maintaining excellent bonding strength.

On the other hand, the prosthesis installation process (S700) using the resin cement bonding method is an adhesive manufacturing step (S710) of forming a resin cement; And, an adhesive layer forming step (S720) of applying or repairing the adhesive on the entire surface of the tooth and coping being prepared for the procedure (S720). ); And, the prosthesis bonding step (S730) of arranging the prosthesis due to the adhesive layer; And, the prosthesis fixing step of fixing the prosthesis by irradiating the upper surface, the lingual side and the buccal surface of the adhesive layer with blue light several times for 1 to 2 seconds (S740) );

The resin cement is a monomer that is a mixture of Bisphenol A glycidyl Methacrylate and Urethane Dimethacrylate; and a diluent made of Triethyleneglycoldimethacrylate to be added to the mixture; And, a filler made of Glass and Silane-treated Silica added to the mixture; And, a filler added to the mixture. It is composed of: a photoinitiator consisting of camphorquinone and Ethyl 4-dimethylaminobenzoate; and an opacifier consisting of itanium(IV) oxide added to the mixture; and various colorants that impart color to the mixture.

The resin cement is stored in a dedicated storage container, and when used, a set amount is discharged from the storage container, applied to the entire coping surface, and then irradiated with blue light of 371 to 468 nm for 1 to 2 seconds to be bonded by radical chain polymerization initiation reaction.

The PFM crown manufactured through each process as described above has the following structure.

The PFM crown is a coping layer that is fully or partially seated on the upper surface of the patient's prep tooth; (10), a coping layer or a dental adhesive layer 20 applied to the upper surface of the tooth; and, a coping layer by the dental adhesive layer. Consists of; a prosthesis 30 to be combined.

The coping layer 10 is made of a soft metal material, and is provided in a shape corresponding to the patient's roots or crowns by a 3D modeling program, so that a single or a bridge or three bridge coping method is applied to the defective area of the patient. Installed in a way.

The dental adhesive layer 20 is bonded by polymerization or heat treatment depending on the type of adhesive. For example, when resin cement is used as an adhesive, self-polymerization or photopolymerization is attempted to induce bonding, and when ceramic cement is used as an adhesive, a heat treatment of 800 to 1000°C is attempted to induce bonding.

When the ceramic cement is used as an adhesive, it is possible to effectively combine coping and prosthesis by preventing wash out by saliva secreted from the salivary glands of the oral cavity.

The prosthesis 30 is made in the form of restoring the patient's lost teeth through a digital milling machine or 3D printer, and is firmly bonded to the coping layer by the adhesive layer 20 applied to the coping layer 10 to replace the lost tooth To play a role.

The PFM crown of the present invention consisting of the above configuration provides high-quality implants by securing the rapidity, convenience, and precision of product manufacturing by coping and prosthesis for the patient's impression information based on a digital milling machine or 3D printer. It is possible to use an opaque dental adhesive similar to that of natural teeth to actively block color development errors due to color overlapping on the joint surface of the coping body and the prosthesis, and a single coping method or bridge depending on the composition of the patient's lost teeth. Provides a coping method, in particular, the single coping method provides a full or partial coping method according to the shape of the cut tooth, and the bridge coping method uses a link bridge coping method or a three-bone bridge coping method depending on the remaining structure of the tooth. By providing it, it is possible to treat patients of various conditions.

In addition, a large amount of coping modeling information is collected and stored using a storage module of a design program, and management is performed based on a library according to tooth number or coping modeling, thereby providing convenience of work.

The present invention described above has been described with reference to an embodiment shown in the drawings, but this is only exemplary, and various modifications and other equivalent embodiments are possible from those of ordinary skill in the art. Should be clarified. Accordingly, the true technical protection scope of the present invention should be interpreted by the appended claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10. Coping layer
20. Dental adhesive layer
30. Prosthesis
S100. Impression acquisition process
S200. Coping modeling process
S300. Prosthesis modeling process
S400. Coping processing process
S500. Prosthesis processing process
S600. Coping installation process
S700. Prosthesis installation process

Claims (8)

Impression-taking process of obtaining impression information from the patient's oral cavity (S100);
Coping modeling process in which a single coping modeling installed on a single tooth or bridge coping modeling installed on a plurality of teeth is performed using a 3D modeling program based on the impression information (S200);
A prosthesis modeling process of modeling a prosthesis using a 3D modeling program based on impression information and coating modeling information (S300);
A coping processing step (S400) of forming a soft metal according to coping modeling information using a CAD/CAM system and sintering at a set temperature;
Prosthesis processing process of forming a ceramic material according to the prosthesis modeling information using a CAD/CAM system (S500);
Coping installation process of installing the molded coping in the patient's oral cavity (S600);
Prosthesis installation step of bonding the prosthesis after applying a dental adhesive to the coping surface (S700);
Digital technology-based PFM crown manufacturing method, characterized in that consisting of.
The method of claim 1,
The single coping modeling may include partial coping modeling installed in a partial region of the tooth according to the shape of the prepared tooth; Or the entire coping modeling installed on the front of the tooth; digital technology-based PFM crown manufacturing method, characterized in that consisting of.
The method of claim 2,
The bridge coping modeling may include link bridge coping modeling for fastening a prosthesis by coping each of teeth prepared on both sides based on the lost tooth; Or three bridge coping modeling for fastening a prosthesis by connecting the lost tooth and all peripheral teeth by coping. Digital technology-based PFM crown manufacturing method, characterized in that consisting of.
The method of claim 1,
In the coping modeling process (S200), modeling is performed using a library-based storage module provided by a design program, but the storage module stores self-produced coping reference modeling and coping modeling information worked by the operator according to the tooth number. A method for manufacturing a PFM crown based on digital technology, characterized in that a systematic work environment for coping modeling is created by separating and storing into sets and inducing reading or editing the stored modeling by selecting a tooth number during work.
The method of claim 1,
The dental adhesive is a resin cement in which adhesion is induced by self-adhesive or photopolymerization; Or ceramic cement (Ceramic cement) in which adhesion is induced by heat treatment; digital technology-based PFM crown manufacturing method, characterized in that consisting of.
The method of claim 1,
The prosthesis installation process (S700),
An adhesive manufacturing step (S710) of forming a resin cement;
An adhesive layer forming step (S720) of applying or repairing the adhesive on the entire surface of the tooth and the coping being prepared for the procedure;
Prosthesis bonding step of disposing the prosthesis due to the adhesive layer (S730);
A prosthesis fixing step (S740) of fixing the prosthesis by irradiating the upper surface, the lingual surface, and the buccal surface of the adhesive layer with blue light several times;
Digital technology-based PFM crown manufacturing method, characterized in that consisting of.
The method of claim 1,
The prosthesis installation process (S700),
An adhesive manufacturing step (S710) of forming a ceramic cement;
An adhesive layer forming step (S720) of applying an adhesive to the entire surface of the tooth and coping being prepared for the procedure;
Prosthesis bonding step of disposing the prosthesis due to the adhesive layer (S730);
Prosthesis fixing step of fixing the prosthesis by heat treatment of the adhesive layer (S740);
Digital technology-based PFM crown manufacturing method, characterized in that consisting of.
The digital technology-based PFM crown consisting of any one of claims 1 to 7.

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