TW201603782A - Dental crown and its manufacturing method - Google Patents

Abstract

The present invention relates to a dental crown and its manufacturing method, comprising the following steps: performing oral cavity imprinting or oral cavity scanning for a patient to obtain the upper edge shape of the patient's original tooth/implant abutment in the oral cavity and the image data of the environment contour edge formed together by the patient's original tooth/implant abutment and adjacent teeth of the patient's original tooth/implant abutment; using a dental crown design software to design according to the image data and using metal powder as material to perform selective laser melting (SLM) to form a metal inner crown, followed by ceramic accumulation and glazing, thereby completing the dental crown in a streamlined, precise and fast way. The dental crown made according to this invention provides more complete protection for the patient's original tooth/implant abutment to provide more comfort and durability.

Description

Crown and manufacturing method thereof

The invention relates to a crown and a manufacturing method thereof, in particular to an artificial crown which is comfortable and durable to use and a manufacturing method thereof.

In the dental medicine, the crown is broadly referred to as the part of the tooth that is outside the gum. The crowns referred to in the market today are mostly "man-made crowns" (or braces). The crown referred to in the present invention is an artificial crown, and is called a crown.
Press, artificial crowns are mainly used to repair or repair teeth. When teeth are tooth decay or lesions or various injuries, and it is difficult to achieve repair through simple fillings, for health reasons and for the purpose of shaping plastic surgery, the dental crown can be passed through the crown at the suggestion of the dentist (ie, according to the patient's original The shape of the upper outer edge of the tooth or implant, and the Abutment of the patient and the adjacent teeth of the patient's primary tooth/Abutment The crown formed by the contour of the environment is to be repaired.
The so-called "environmental contour" must be stated because any abutment or abutment must conform to the appearance of the adjacent teeth in the crown, so the contour must be established. It is not possible to consider only a single individual of a native tooth/abutment. As for the Abutment, the Abutment is a substitute root that is implanted in the gums when the primary tooth is severely damaged.
Therefore, the commercial market of crowns is based on the clinical needs of dentists and the identity of patients.
At present, the common steps of the crown setting are: the patient's dental impression → gypsum filling mold → gypsum mold sampling → installation of the articulator → wax engraving and shaping → fine wax mold completion → embedding casting → centrifugal pouring → Finely repaired external crowns → three pushes of porcelain glazing → customized external crowns of the teeth → manual run single delivery → clinical corrections are in line with the cumbersome steps of the patient wearing the dental impression plaster cast plaster and mold sampling Achieved.
As shown in the first figure, the prior art crown (1) comprises a metal inner crown (11) formed by centrifugation, and the inner edge of the metal inner crown (11) is along the patient's primary tooth/incision The outer edge of the Abutment (2) is formed into a uniform thickness, and the outer edge of the metal inner crown (11) is a opaque plastic porcelain layer having an average thickness greater than the average thickness of the inner metal crown (11) (12) The outer edge of the opaque shaped porcelain layer (12) is based on the environmental contour of the original tooth/planting tooth (Abutment) (2), and then the glaze layer (13) is further shaped according to the opaque shaping porcelain The outer edge of the layer (12) is laid.
From the aforementioned prior art manufacturing process and the formed crown (1), the problem can be found:
1. The inner crown (11) of the metal must fit the inner edge of the patient's primary tooth/tooth (2) (Abutment), and then use its outer edge as the inner edge of the opaque plastic layer (12). Therefore, the metal inner crown (11) determines the core quality of the crown (1), but from the foregoing, the metal inner crown (11) must pass through the patient's dental impression → gypsum filling → gypsum overmolding sampling → installation occlusion The machine → wax carving and shaping → fine wax mold completion → embedding casting → centrifugal pouring can be completed, so the process is cumbersome.
2. In addition, the outer crown of the tooth must be glazed through the outer crown of the finely modified tooth → three push porcelain, and must be completed after the completion of the manual run distribution → clinical correction in line with the patient wearing the dental impression plaster irrigation The step of mold casting and sampling is completed, so it is necessary to take cumbersome steps to achieve customization.
3. Since the inner edge of the metal inner crown (11) is formed into an equal thickness along the outer edge of the patient's primary tooth/tooth (2) (Abutment), and the average thickness is smaller than the opaque plastic layer (12) Therefore, the metal inner crown (11) is generally not used as a contact layer against occlusion, and the occluded contact layer mainly relies on the opaque shaped porcelain layer (12) of the outer edge of the metal inner crown (11), however The color-shaped porcelain layer (12) is porcelain and is usually easily cracked.

One of the objects of the present invention is to provide a method for manufacturing a crown, which effectively changes the traditional crown making mode, which is not only quick and rapid, but also more scientific and precise, and meets the needs of market development.
It is an object of the present invention to provide an improved crown which is not only more beneficial to the user's dental protection and health, but also more comfortable and durable to use.
A method for manufacturing a crown provided by the present invention comprises the following steps:
1. Obtaining the shape of the upper outer edge of the patient's primary tooth/infant tooth, and the environmental contour formed by the patient's primary tooth/incision tooth and the adjacent tooth of the patient/plant tooth Image data of the edge;
2. The image data is transmitted by wire/wireless for analysis and processing, and the crown design is completed according to the analysis and processing of the image data;
3. According to the crown design, a metal inner crown is formed, and the inner edge of the metal inner crown is shaped along the outer edge of the upper part of the patient's primary tooth/plant tooth, and the outer edge of the metal inner crown is based on the patient's original tooth Forming the dental prosthesis with the contour of the environment formed by the adjacent teeth of the patient's primary teeth/planting teeth;
4. The metal inner crown ceramic is formed with a ceramic layer having an inner edge and an outer edge which are identical to the outer edge of the metal inner crown; and the average thickness of the ceramic layer is smaller than an average thickness of the inner metal crown;
5. Glaze is formed along the outer edge of the ceramic layer to form a crown.
Further, in the step of obtaining the patient's oral cavity, the shape of the upper outer edge of the patient's primary tooth/incision tooth, and the adjacent tooth of the patient's primary tooth/incision tooth and the patient/plant tooth The method for jointly forming the image data of the environmental contour edge includes: scanning or photographing the impression/intraoral cavity of the patient's mouth to ensure the accuracy of obtaining the image data.
Further, the metal inner crown is prepared in the step 3, and is formed by selective laser melting using a metal powder as a material. Further, the metal powder is a cobalt nickel alloy. Further in step 3, after the metal inner crown is formed, the method further comprises quenching and strengthening the metal inner crown. Further, the image data is analyzed and processed, including: oral occlusion simulation processing, oral lateral occlusion and torsion simulation processing, oral upper and lower occlusal surface comparison processing, tilting angle adjustment processing with adjacent teeth of the original tooth, and assembly gap value processing . In order to better suit the user's multi-faceted applicability.
Further, after the step 5, the method further comprises: the quality control detection of the step 6, that is, the shape of the upper outer edge of the tooth of the patient's primary tooth/plant tooth, and the tooth of the patient's primary tooth/plant tooth The image data of the environmental contour formed by the adjacent teeth of the patient's primary teeth/plant teeth are compared.
The invention also provides a crown comprising: a metal inner crown for covering the outer edge of the upper teeth of the patient's primary teeth/abutment; a ceramics layer having an average thickness smaller than the inner metal The average thickness of the crown, and the inner and outer edges of the ceramic layer are the same as the outer edge of the metal inner crown. The ceramics generally include ceramic or porcelain; a layer of bright glaze is laid along the outer edge of the ceramic layer. Further, the inner edge of the metal inner crown is shaped along the outer outer edge of the patient's primary tooth/abutment, and the outer edge of the metal inner crown is based on the patient's primary tooth/abutment (Abutment). Formed with the contour of the environment formed by the adjacent teeth of the patient's primary teeth/abutment.
Compared with the prior art, the present invention has the following advantages:
1. The technical characteristics of this case are not simply a method of "how to form a crown or an inner crown." The deeper meaning and motivation of the invention lies in reforming the production of "crown crown" in the past. It must be complicated to make teeth based on the traditional tooth model master. The mold, and then the crown is built according to the tooth mold, and must be visually or personally tried, and then repeatedly repaired and other fine processes, in order to form a crown that meets the patient's needs, the running order (for the execution process of the instruction) is cumbersome And does not meet economic benefits. Therefore, it can only be based on traditional production techniques, and for trial wear, it can only exist and operate nearby, but has limitations for industrial development and cannot expand the larger international market and trade space. Through the invention, the data of each oral contour can be obtained, the transmission is fast and there is no limit, and the rapid production and testing are carried out according to the data, and the quality control is carried out to reduce the cumbersomeness of repeated running and molding.
2. The average thickness of the ceramic layer of the crown of the present invention is less than the average thickness of the inner crown of the metal, and the inner and outer edges of the ceramic layer are the same as the outer edge of the metal inner crown; therefore, the metal inner crown of the present invention Relatively thick, it is directly used as a contact layer for occlusion and resistance to food hardness. Compared with the prior art inner crown as a cushion for the intermediary, the structure and meaning are different. Moreover, since the metal inner crown of the present invention has a large average thickness, the metal has better elasticity and toughness, so that the occlusion and resistance to food hardness are more comprehensive for the protection of the patient's primary teeth/abutment. This is more conducive to the health of the teeth, and the use is more comfortable and durable.

(1)‧‧‧ crown
(11)‧‧‧Metal crown
(12)‧‧‧Colored ceramic layer
(13) ‧ ‧ glaze
(2) ‧ ‧ patients with primary teeth / implant teeth
(3) ‧ ‧ crown
(31)‧‧‧Metal crown
(32)‧‧‧Ceramic layer
(33) ‧ ‧ glaze

The first figure is a cross-sectional view of a prior art crown and a patient's primary tooth / implant tooth plane. The second figure is a cross-sectional view of the crown of the present invention and the patient's primary tooth / implant tooth plane. The third diagram is the flow of the present invention. Figure

The technical content, features and embodiments of the present invention will be described below with the aid of the drawings, so that you can have a better understanding of the case.
Example 1:
The invention relates to a method for manufacturing a crown, the steps of which at least comprise:
1. Obtaining the shape of the upper outer edge of the patient's original tooth/infuser tooth, and the environmental contour formed by the patient's primary tooth/incision tooth and the adjacent tooth of the patient/plant tooth Image data of the edge;
2. The image data is transmitted by wire/wireless for analysis and processing, and the crown design is completed according to the analysis and processing of the image data;
3. According to the crown design, a metal inner crown is formed, the inner edge of the metal inner crown is shaped along the outer edge of the upper part of the patient's primary tooth/incision, and the outer edge of the metal inner crown is The patient's primary tooth/planting tooth is formed by the contour of the environment formed by the adjacent tooth of the patient's primary tooth/plant tooth;
4. forming a ceramic layer having the inner edge and the outer edge of the metal inner crown ceramic as being the outer edge of the metal inner crown; and the average thickness of the ceramic layer is smaller than the average thickness of the metal inner crown;
5. Glazing along the outer edge of the ceramic layer to form a bright glaze layer to form a crown.
The preferred embodiment obtains the shape of the upper outer edge of the patient's primary tooth/planting tooth in the oral cavity of the patient as described in step 1, and the patient's primary tooth/incision tooth and the patient/plant tooth The method of image data of the environmental contour formed by the adjacent teeth includes scanning or imaging the impression/intraoral cavity of the patient's mouth.
The preferred embodiment is formed into a metal inner crown as described in the step 3, and is formed by selective laser melting using a metal powder as a material, and can be quickly and accurately formed.
In a preferred embodiment, the metal powder is a cobalt nickel alloy. Cobalt-nickel alloys with low human health, cobalt has high wear resistance, and moderate addition of nickel promotes processability and toughness improvement.
In a preferred embodiment, after the metal inner crown is formed in the step 3, the metal inner crown is quenched and strengthened to increase the rigidity of the metal inner crown.
In a preferred embodiment, the image data is analyzed and processed, including: oral occlusion simulation processing, oral lateral occlusion and torsion simulation processing, oral upper and lower occlusal surface alignment processing, tilting angle adjustment processing with adjacent teeth of the original tooth, and assembly Gap value processing.
After the step 5, the preferred embodiment further includes: step 6 quality control detection, that is, the crown and the patient's mouth include the shape of the upper outer edge of the patient's primary tooth/plant tooth, and the patient's primary tooth/instrumentation table The teeth are compared with the image data of the environmental contour formed by the adjacent teeth of the patient's primary teeth/plant teeth. In order to better suit the user's multi-faceted applicability.
Example 2:
Referring to the third figure and in conjunction with the second figure, the present invention relates to a method of manufacturing a crown, the steps of which include:
1. Using the intra-oral impression/intraoral scan of the patient, the shape of the upper outer edge of the patient's primary tooth/abutment is included in the oral cavity of the patient, and the patient's primary tooth/abutment tooth (Abutment) and The image data of the contour of the environment formed by the adjacent teeth of the patient's primary teeth/planting teeth (Abutment);
2. Transfer the image data to the database of the crown design unit in a wired/wireless network;
3. The image data is used for analysis and processing by wired/wireless transmission, and the finished crown design is used according to the analysis and processing of the image data, and according to the design, the metal powder is used, and the better material is not harmful to the human body. Cobalt-nickel alloy, cobalt is wear-resistant, moderately added nickel to promote processability, toughness improvement, and then a metal inner crown is formed by selective laser melting (SLM, Selective Laser Melting). ); combined with CNC, Computer number control is more precise and convenient for process control. The inner edge of the metal inner crown (31) is shaped along the upper outer edge of the patient's primary tooth/abutment (2), and the outer edge of the metal inner crown (31) is based on the patient's native tooth/plant The Abutment (2) is formed with the environmental contour formed by the adjacent teeth of the patient's primary teeth/Abutment (2); it must be stated that the selective laser melting method (SLM, Selective Laser Melting) is a kind of "metal rapid original fabrication technology" known in the industry, and it is not to be repeated, and this case is not solely based on this method, so as to avoid misunderstanding and explain.
4. The stack ceramic forms a ceramic layer (32) having an inner edge and an outer edge that are identical to the outer edge of the metal inner crown (31); and the average thickness of the ceramic layer (32) is less than the average thickness of the inner metal crown.
5. Glazing along the outer edge of the ceramic layer (32) to form a bright glaze layer (33);
6. Reverse and the patient's mouth include the shape of the upper outer edge of the patient's primary tooth / implant Abutment, and the patient's native tooth / implant tooth (Abutment) and the patient's native tooth / implant tooth The image data of the environmental contours formed by the adjacent teeth of (Abutment) is the quality control (QC) test.
By adopting the technical means of the invention, it is possible to confirm the transportation and collection time, and quickly produce the complete product to the medical institution or the consumer end of the demand.
The invention can obtain the data of the oral contour more efficiently, and the transmission is fast and has no near-far limitation, and the rapid production production, testing and quality management are performed according to the data. Reduce the tediousness of repeated running orders and molding.
In addition to the novelty and advancement of the manufacturing method of the present invention, the crown of the present invention has the inner edge of the metal inner crown (31) along the upper part of the patient's primary tooth/abutment (Abutment) (2). The edge shape, and the outer edge of the metal inner crown (31) is adjacent to the patient's native tooth/abutment (Abutment) (2) and the patient's native tooth/abutment (Abutment) (2) The contour of the environment formed by the teeth is formed, and the metal inner crown (11) of the prior art shown in the first figure is only a "cushion" of equal thickness, and actually serves as a bite and resistance to food hardness. The opaque shaped ceramic layer (12) is different.
Example 3:
Referring to the second figure, the present invention also provides a crown (3) comprising: a metal inner crown (31) for covering a patient's primary tooth/abutment tooth (Abutment) (2) upper outer edge; ceramic layer (32), the average thickness of the ceramic layer (32) is smaller than the average thickness of the inner metal crown (31), and the inner edge and the outer edge of the ceramic layer (32) are the same The outer edge of the metal inner crown (31); the bright glaze layer (33) is laid along the outer edge of the ceramic layer (32).
As a further embodiment of the present invention, the present invention has the inner edge of the metal inner crown (31) along the upper outer edge shape of the patient's native tooth/an implant (Abutment) (2), and the metal inner crown (31) The outer edge of the patient is formed according to the environmental contour of the patient's primary tooth/abutment (2) and the adjacent tooth of the patient's native tooth/abutment (2). To make the patient wear more comfortable and ergonomic design.
Compared with the prior art, the metal inner crown (11) shown in the first figure is only a "cushion" of equal thickness, and actually the occlusion and resistance to food hardness is the opaque plastic layer (12). . The average thickness of the ceramic layer (32) of the present invention is less than the average thickness of the inner metal crown (31), and the inner and outer edges of the ceramic layer (32) are the same as the outer edge of the metal inner crown (31). It can be seen that the metal inner crown of the present invention is relatively thick, and is directly used as a contact layer for occlusion and resistance to food hardness; and the inner crown of the prior art is used as a cushion layer of the intermediate medium, and the structure and meaning are different. Since the metal inner crown of the present invention has a large average thickness and the metal has better elasticity and toughness, the protection of the patient's primary teeth/abutment (Abutment) (2) is better for the bite and resistance to food hardness. It is well-conceived, which is more conducive to the health of the teeth, and is more comfortable and durable.
In summary, the present invention is indeed in line with industrial utilization, and is not found in publications or publicly used before application, nor is it known to the public, and has non-obvious knowledge, conforms to patentable requirements, and patents are filed according to law. . However, the above description is a preferred embodiment of the industry of the present invention, and all the equivalent changes made by the scope of the patent application of the present invention are within the scope of the claim.

Claims (10)

[Item 1] A crown manufacturing method, the steps comprising at least:
1. Obtaining the shape of the upper outer edge of the patient's primary tooth/infant tooth, and the environmental contour formed by the patient's primary tooth/incision tooth and the adjacent tooth of the patient/plant tooth Image data of the edge;
2. The image data is transmitted by wire/wireless for analysis and processing, and the crown design is completed according to the analysis and processing of the image data;
3. According to the crown design, a metal inner crown is formed, and the inner edge of the metal inner crown is shaped along the outer edge of the upper part of the patient's primary tooth/plant tooth, and the outer edge of the metal inner crown is based on the patient's original tooth Forming the dental prosthesis with the contour of the environment formed by the adjacent teeth of the patient's primary teeth/planting teeth;
4. The metal inner crown ceramic is formed with a ceramic layer having an inner edge and an outer edge which are identical to the outer edge of the metal inner crown; and the average thickness of the ceramic layer is smaller than an average thickness of the inner metal crown;
5. Glaze is formed along the outer edge of the ceramic layer to form a crown. [Item 2] The crown manufacturing method according to claim 1, wherein in the step 1, the patient obtains a shape of an upper outer edge of the patient's primary tooth/infant tooth, and the patient's primary tooth/incision table The method of image data of the contour of the environment formed by the teeth and the adjacent teeth of the patient/plant tooth includes: scanning or imaging the impression/intraoral of the patient's mouth. [Item 3] The method for manufacturing a crown according to claim 1, wherein in the step 3, the metal inner crown is formed by selective laser melting using a metal powder as a material. [Item 4] The method for manufacturing a crown according to claim 3, wherein the metal powder is made of a selective laser melting method, and the CNC is processed for processing. [Item 5] The crown manufacturing method according to claim 1, wherein the metal powder is a cobalt-nickel alloy. [Item 6] The method for manufacturing a crown according to claim 1, wherein the metal inner crown is subjected to quenching after the metal inner crown is formed in the step 3; strengthen. [Item 7] The method for manufacturing a crown according to claim 1, wherein the image data is analyzed and processed, including: oral occlusion simulation, oral lateral occlusion torsion simulation, oral occlusal surface alignment, and native The tooth adjacent tooth inclination angle adjustment process and the assembly gap value process. [Item 8] The method for manufacturing a crown according to claim 1, wherein after the step 5, the quality control test of the step 6 is further included, that is, the crown and the patient's mouth include the upper outer edge of the patient's primary tooth/plant tooth. The shape and the image data of the environmental contour of the patient's primary tooth/planting tooth and the neighboring tooth of the patient's primary tooth/plant tooth are compared. [Item 9] A crown characterized by comprising:
a metal inner crown for covering the outer edge of the upper teeth of the patient's primary teeth/plant teeth;
a ceramic layer, the average thickness of the ceramic layer is less than the average thickness of the inner crown of the metal, and the inner edge and the outer edge of the ceramic layer are the same as the outer edge of the metal inner crown;
A bright glaze layer is laid along the outer edge of the ceramic layer. [Item 10] The crown according to claim 9, wherein the inner edge of the metal inner crown is shaped along the outer edge of the upper part of the patient's primary tooth/plant tooth, and the outer edge of the metal inner crown is based on the patient's primary tooth. The implanted tooth is formed by the contour of the environment formed by the adjacent tooth of the patient's primary tooth/plant tooth.