Reinforced construction of one-piece implant-supported overdenture and method of making same

Abstract

Provided is a denture with a base that suppresses a decrease in esthetics while improving strength. A method for manufacturing a denture with a base includes: a step of producing a denture base (3) that is formed with a concave tooth socket (2) and in which a longitudinal groove (7) is formed in a bottom surface of the tooth socket (2); a step of applying an adhesive material (9) to the tooth socket (2) and the longitudinal groove (7); a step of embedding a reinforcing structure (8) in the longitudinal groove (7) to which the adhesive material (9) is applied; and a step of arranging an artificial tooth (1) in the tooth socket (2) to which the adhesive material (9) is applied.

Description

Technical Field

[0001] This invention relates to a reinforced, one-piece implantable denture and its manufacturing method, and particularly to a method for manufacturing dentures using computer-aided design and manufacturing (CAD / CAM) in the field of dentures. Background Technology

[0002] Patent Document 1 discloses a denture with a base using dental reinforcing filament. The denture with a base described in Patent Document 1 is formed by deforming a dental reinforcing filament, on which at least a portion of the outer surface of the filament with a flat cross-section has a concave portion and / or a convex portion, into a predetermined shape, and embedding the dental reinforcing filament in a resin base.

[0003] Patent Document 2 discloses a fiber-reinforced resin denture in which a reinforcing fiber is embedded as a reinforcing structure under an artificial tooth row. In the fiber-reinforced resin denture described in Patent Document 2, the denture is integrally formed by embedding reinforcing fibers inside the base portion below the artificial teeth along the tooth row, which is composed of many artificial teeth and a base portion of synthetic resin for fixing the artificial teeth.

[0004] Patent Document 3 discloses a method for manufacturing a dental restoration. The manufacturing method described in Patent Document 3 includes: a step of digitizing the shape of the oral cavity; a step of designing a resin body as a part formed of resin based on the data; a step of designing a position of a dental reinforcement disposed on the inner side of the resin body based on the data; and a step of designing a resin body with an opening, based on the position where the dental reinforcement is disposed, in a manner that forms an opening connecting the space and the outside at that position based on the data.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 8-66413

[0008] Patent Document 2: Japanese Patent Application Publication No. 11-60425

[0009] Patent Document 3: International Publication No. 2016 / 052321 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] The problem to be solved by the present invention is to provide a denture with a base that improves strength while suppressing the decline in aesthetics.

[0012] Solutions used to solve problems.

[0013] The present invention, which solves the above-mentioned problems, will now be described. For ease of understanding, the reference numerals in the specification and drawings are enclosed in parentheses, but the present invention is not limited thereto.

[0014] A method for manufacturing a denture base according to one aspect of the present invention includes: the step of manufacturing a denture base (3) having a concave socket (2) and a longitudinal groove (7) formed on the bottom surface of the socket (2); the step of applying an adhesive material (9) to the socket (2) and the longitudinal groove (7); the step of embedding a reinforcing structure (8) into the longitudinal groove (7) coated with the adhesive material (9); and the step of placing an artificial tooth (1) in the socket (2) coated with the adhesive material (9).

[0015] One aspect of the present invention comprises: a denture base (3) having a concave tooth socket (2) and a longitudinal groove (7) formed on the bottom surface of the tooth socket (2); an adhesive material (9) disposed in the tooth socket (2) and the longitudinal groove (7); a reinforcing structure (8) disposed in the longitudinal groove (7) and embedded in the adhesive material (9); and an artificial tooth (1) disposed in the tooth socket (2) and bonded by the adhesive material (9).

[0016] Invention Effects

[0017] According to the present invention, a denture with a base can be provided that improves strength while suppressing the reduction of aesthetics. Attached Figure Description

[0018] Figure 1 This is a sectional view of the components of the reinforced, embedded denture before completion, viewed from the side.

[0019] Figure 2 This is a sectional view of the reinforced submerged denture components after completion, viewed from the side of the mandibular anterior teeth.

[0020] Figure 3 This is a cross-sectional view of another example of a reinforced, one-piece embedded denture with a base.

[0021] Figure 4 This is a top view of the state before the reinforcing structure and artificial teeth are embedded into the denture base of another example.

[0022] Figure 5 Yes Figure 4 A top view of the denture base, from which reinforcing structures and artificial teeth are embedded and bonded.

[0023] Figure 6 This is another example of a reinforced submerged denture with a basement. (Side view)

[0024] Figure 7 This is a sectional view from the side showing the state of the reinforcing structure embedded in another example of a denture base.

[0025] Figure 8 This is a flowchart of a manufacturing method for a reinforced, one-piece embedded denture using computer-aided design and manufacturing (CAD / CAM) processes.

[0026] Figure 9 This is an illustrative flowchart of a method for manufacturing dentures with a base.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1: Artificial teeth;

[0029] 1a: Base;

[0030] 2: Tooth socket;

[0031] 3: Denture base;

[0032] 4: Mucosal surface;

[0033] 5: The middle part between the mucosal surface of the denture base and the tooth socket;

[0034] 6: Base surface;

[0035] 7: Longitudinal groove;

[0036] 7a: Inner wall;

[0037] 8: Strengthen the structure;

[0038] 9: Adhesive materials;

[0039] 10: Last molars;

[0040] 11: Small connector;

[0041] 12: The gap between the longitudinal groove and the reinforcing structure;

[0042] 13: Protrusion;

[0043] 14: Holding device;

[0044] W1: Enhances the near and far diameter width of the structure;

[0045] W2: Enhances the diameter of the structure on the lips or cheeks;

[0046] P1: The process of designing and reinforcing structural components;

[0047] P2: The process of automatically generating the shape of the denture base with longitudinal grooves. Detailed Implementation

[0048] (The process of realizing this disclosure)

[0049] In conventional denture fabrication methods, reinforcing wires, such as metal wires, are embedded as reinforcement structures in areas of the denture base prone to breakage. The process involves embedding and dewaxing in a flask, followed by temporary fixation by inserting the reinforcing wire into a plaster model at an appropriate location within the denture base. However, after the denture base is polymerized with resin, the reinforcing wire inserted into the plaster model protrudes towards the mucosal surface of the denture during excavation. This necessitates complex procedures such as removing excess reinforcing wire and fine grinding. Furthermore, the pressure from the resin filling material causes deformation and displacement of the reinforcing wire from its intended position. Additionally, this method often places the reinforcement structure primarily in the center of the denture base, resulting in an aesthetically unappealing, dull appearance.

[0050] On the other hand, in recent years, as a method for manufacturing dentures with base plates, the denture base plate is designed on a computer using CAD / CAM technology. The denture base plate, except for the part where the artificial tooth is embedded, is manufactured by cutting and machining using NC machines and layering modeling using 3D printers. The existing artificial tooth is then bonded to the artificial tooth embedding part (called the socket) of the denture base using specialized adhesive materials such as dental acrylic resin. This method has become practical.

[0051] In recent years, the use of 3D printers has gained attention in the fabrication of denture bases using CAD / CAM technology. However, denture bases made using 3D printers may have strength issues compared to traditional denture bases made with acrylic resin or by machining disks. Furthermore, denture bases made with 3D printer materials have been shown to have weaker bonding strength with restorative materials such as dental acrylic resin, potentially leading to strength problems when reinforcing structures are embedded after the denture base is completed. Additionally, to date, no computer-aided denture fabrication method has included embedding reinforcing structures in the denture base; while methods such as using connecting teeth to compensate for strength have been proposed, these have not yet fully addressed the issue.

[0052] Patent Document 1 discloses a denture with a base that uses dental reinforcing filament. The denture disclosed in Patent Document 1 is a denture with a base based on the aforementioned manufacturing method. In recent computer-aided denture manufacturing methods, it is not possible to embed such reinforcing filament into the denture base during the manufacturing process.

[0053] Patent Document 2 discloses a denture in which a fiber reinforcing thread is embedded as a reinforcing structure under the artificial tooth row. The denture disclosed in Patent Document 2, like that in Patent Document 1, is based on a conventional method. However, in recent computer-aided denture fabrication methods, it is not possible to embed such a reinforcing thread during the fabrication process.

[0054] Patent Document 3 discloses a method for manufacturing a dental restoration, including: a step of digitizing the shape of the oral cavity; a step of designing a resin body as a part formed of resin based on the data; a step of designing the position of a dental reinforcement disposed on the inner side of the resin body based on the data; and a step of designing a resin body with an opening based on the position where the dental reinforcement is disposed, forming an opening connecting the space and the outside at that position based on the data. However, it does not specifically mention the position where the reinforcement should be disposed, the direction from which the opening should be made, or the method of sealing the opening. For example, in the case of the denture shown in Figure 11 of Patent Document 3, the reinforcement is disposed in the denture base inside the implant of the artificial tooth, which presents aesthetic problems such as the appearance when the patient opens their mouth. Furthermore, when the opening direction is the polished surface side (surface) of the denture, it is presumed that the opening is sealed by hand using room temperature polymerized resin or the like from the dental reinforcement inserted into the denture base, but since there is excess resin, morphological correction and polishing are required. Furthermore, when the opening direction is set to the mucosal side of the denture, it is difficult to accurately reproduce the shape of the mucosa by modifying the shape of the remaining part, which will cause the denture to be unsuitable and painful, and therefore it is not feasible in reality.

[0055] Therefore, in order to solve the above-mentioned problems, the inventors discovered a structure in which the reinforcing structure and the artificial teeth are embedded in the denture base and bonded together, and achieved the following invention.

[0056] The manufacturing method of the denture base of the first embodiment of the present invention includes: the step of manufacturing a denture base (3) having a concave tooth socket (2) and a longitudinal groove (7) formed on the bottom surface of the tooth socket (2); the step of applying an adhesive material (9) to the tooth socket (2) and the longitudinal groove (7); the step of embedding a reinforcing structure (8) into the longitudinal groove (7) coated with the adhesive material (9); and the step of placing an artificial tooth (1) in the tooth socket (2) coated with the adhesive material (9).

[0057] Based on this configuration, it is possible to manufacture dentures with improved strength and reduced aesthetic appeal. That is, fracture resistance can be improved without compromising the aesthetics of the denture. For example, in a method for manufacturing dentures using computer-aided design and manufacturing processes (CAD / CAM), the reinforcing structure and artificial teeth are embedded into the denture base in one step and bonded together, thereby facilitating the manufacture of dentures with strength capable of withstanding impacts and loads generated during use, while also suppressing aesthetic degradation.

[0058] In the manufacturing method of the basement denture of the second aspect of the present invention, the artificial tooth (1) may include at least six parts: the left and right central incisors, the lateral incisors and the canines of the anterior teeth. The longitudinal groove (7) and the reinforcing structure (8) are formed in the shape of an arched tooth. The mesiodistal diameter (W1) of the reinforcing structure (8) is more than 1 / 2 of the mesiodistal diameter of the molar (10). The diameter (W2) of the longitudinal groove (7) and the reinforcing structure (8) on the labial or buccal surface is more than 1.5 mm and less than 15.0 mm.

[0059] In the third embodiment of the present invention, the method for manufacturing a denture with a base can also be that the denture with a base is a partial denture with a base, and the reinforcing structure (8) has a small connecting member (11) connected to the holding device (14) for maintaining the denture with a base.

[0060] In the fourth embodiment of the present invention, the method for manufacturing a denture with a base plate may also include the step of embedding the reinforcing structure (8) by: positioning at least a portion of the reinforcing structure (8) at a position that is 0.001 mm to 1.0 mm away from the inner wall (7a) defining the longitudinal groove (7).

[0061] In the fifth embodiment of the present invention, the method for manufacturing a denture base may include the following steps: obtaining design data for a denture base (3) having the tooth socket (2) and the longitudinal groove (7) formed thereon; and manufacturing the denture base (3) based on the design data.

[0062] The sixth embodiment of the present invention comprises: a denture base (3) having a concave tooth socket (2) and a longitudinal groove (7) formed on the bottom surface of the tooth socket (2); an adhesive material (9) disposed in the tooth socket (2) and the longitudinal groove (7); a reinforcing structure (8) disposed in the longitudinal groove (7) and embedded in the adhesive material (9); and an artificial tooth (1) disposed in the tooth socket (2) and bonded by the adhesive material (9).

[0063] Based on such a structure, a basement denture can provide increased strength and prevent a decline in aesthetics.

[0064] In the seventh embodiment of the present invention, the artificial tooth (1) may include at least six parts: the left and right central incisors, the lateral incisors, and the canines of the anterior part. The longitudinal groove (7) and the reinforcing structure (8) are formed in the shape of an arched tooth. The mesiodistal diameter (W1) of the longitudinal groove (7) and the reinforcing structure (8) is more than 1 / 2 of the mesiodistal diameter of the molar part (10). The diameter (W2) of the longitudinal groove (7) and the reinforcing structure (8) on the labial or buccal surface is more than 1.5 mm and less than 15.0 mm.

[0065] In the eighth embodiment of the present invention, the denture may be a partial denture, and the reinforcing structure (8) has a small connecting member (11) connected to the holding device (14) for maintaining the denture.

[0066] In the ninth embodiment of the present invention, the base denture may also have at least a portion of the reinforcing structure (8) extending from the inner wall (7a) defining the longitudinal groove (7) by a range of 0.001 mm to 1.0 mm, and the adhesive material (9) is applied between at least a portion of the reinforcing structure (8) and the inner wall (7a) defining the longitudinal groove (7).

[0067] In the tenth embodiment of the present invention, a basement denture may also have a protrusion (13) on the inner wall (7a) of the longitudinal groove (7), the protrusion (13) contacting the reinforcing structure (8).

[0068] The present invention will now be described in detail with reference to the accompanying drawings.

[0069] Figure 1This is a sectional view, viewed from the side, showing the components of the reinforced, one-piece embedded denture 100 before completion. The reinforced, one-piece embedded denture 100 comprises three components: an artificial tooth 1, a denture base 3, and a reinforcing structure 8. In this specification, the reinforced, one-piece embedded denture 100 is sometimes referred to as a "denture 100". It should be noted that the denture 100 can be a partial denture or a complete denture.

[0070] The shape, material, and manufacturing method of the artificial tooth 1 are not particularly limited, and artificial teeth based on known technologies can be used. For example, ready-made artificial teeth made of acrylic resin that are mass-produced using molds can be used, or artificial teeth that are designed using dental CAD / CAM technology to meet the requirements of each patient, and then machined or layered to form the shape. The shape of the artificial tooth can be a single tooth with independent parts, or it can be a combination of two or more teeth. For example, the artificial tooth 1 has at least one of the following: a central incisor part, a lateral incisor part, a canine part, a first premolar part, a second premolar part, a first molar part, and a second molar part.

[0071] The denture base 3 is a base for mounting the artificial tooth 1. A socket 2 for embedding the artificial tooth 1 is formed in the denture base 3. Furthermore, in order to embed the reinforcing structure 8, a longitudinal groove 7 with a rib-shaped opening is provided in the denture base 3 from the middle portion 5 of the mucosal surface 4 and the base surface 6 towards the implantation direction of the artificial tooth 1. The material of the denture base 3 is not particularly limited; for example, materials based on known technologies such as PMMA (polymethyl methacrylate), PC (polycarbonate), and PA (polyamide) can be used.

[0072] The dental socket 2 is a concave portion formed on the surface of the denture base 3. The base 1a of the artificial tooth 1 is inserted into the dental socket 2. The base 1a of the artificial tooth 1 refers to the root-side portion of the artificial tooth 1 and is the portion bonded to the denture base 3. The dental socket 2 is formed in a concave shape to match the shape of the base 1a of the artificial tooth 1. That is, the dental socket 2 is formed by a concave shape that surrounds at least a portion of the base 1a of the artificial tooth 1. The dental socket 2 is formed in an arch shape along the arrangement direction of the artificial tooth 1. The artificial tooth 1 is bonded and fixed to the dental socket 2 by the adhesive material 9 described later.

[0073] The mucosal surface 4 is the side of the denture base 3 that contacts the oral mucosa. The base surface 6 is the side of the denture base 3 opposite to the mucosal surface 4, and is where the artificial tooth 1 is placed. The base surface 6 is the bottom surface of the tooth socket 2. The middle portion 5 is the part of the denture base 3 between the mucosal surface 4 and the base surface 6.

[0074] The longitudinal groove 7 is a groove located on the bottom surface of the tooth socket 2, i.e., the base surface 6. The longitudinal groove 7 is a groove that is recessed from the base surface 6 towards the mucosal surface 4, and is located in the middle portion 5. In a cross-section of the artificial tooth 1 viewed from the side, the bottom surface of the longitudinal groove 7 is curved into an arc shape. The size of the longitudinal groove 7 can be arbitrarily set within the range of its width on the buccal or lingual surface of the tooth socket 2, and the depth can be arbitrarily set from the base surface 6 to the mucosal surface 4. However, considering the conventional size of artificial teeth and their arrangement in denture bases, the diameter on the labial or buccal / lingual surface is 1.5 mm to 15.0 mm, preferably 2.0 mm to 12.0 mm. Furthermore, the depth is 0.5 mm to 10.0 mm, preferably 0.6 mm to 9.0 mm.

[0075] Figure 2 This is a sectional view showing the completed components of the reinforced, single-piece embedded denture 100, viewed from the side of the mandibular anterior teeth. That is, Figure 2 This indicates that after the adhesive material 9 was applied to the tooth socket 2 and the longitudinal groove 7 in the shape of the dental arch, the reinforcing structure 8 was embedded in the longitudinal groove 7, and the artificial tooth 1 was further embedded on it, thus achieving the bonding state.

[0076] A reinforcing member 8 is disposed within the longitudinal groove 7. Specifically, the reinforcing member 8 is disposed within the longitudinal groove 7 and embedded with adhesive material 9. That is, the reinforcing member 8 is disposed within the adhesive material 9 coated within the longitudinal groove 7. The reinforcing member 8 is, for example, a line with a circular cross-section. It should be noted that the reinforcing member 8 is not limited to this; it can be a line with a rectangular, elliptical, or polygonal cross-section. Alternatively, the reinforcing member 8 is not limited to a line. For example, the reinforcing member 8 can also be a plate-like member with a rectangular, elliptical, or polygonal cross-section.

[0077] The reinforcing structure 8 is a structure that reinforces the denture base 3. The reinforcing structure 8 is formed of a material with a higher elastic modulus and toughness than the material forming the denture base 3. Regarding the material of the reinforcing structure 8, known materials such as metal and glass fiber composite resin can be used. For example, if it is metal, in addition to commercially available reinforcing wires for denture bases, metal wires for wire hooks, and arched wires for orthodontic treatment, resin materials reinforced with glass fiber can also be used. Furthermore, the size of the reinforcing structure 8 can be arbitrarily set within the range of its width on the buccal or lingual surface of the socket 2, and the depth can be arbitrarily set from the base surface 6 to the mucosal surface 4. It should be noted that, considering the size of conventional artificial teeth and their arrangement in denture bases, the diameter on the labial or buccal / lingual surface is 1.5 mm to 15.0 mm, preferably 2.0 mm to 12.0 mm, and the depth is 0.5 mm to 10.0 mm, preferably 0.6 mm to 9.0 mm. Furthermore, in order to apply the adhesive material 9 between the longitudinal groove 7 and the reinforcing structure 8, it is ideal to reduce (offset) the thickness of the material by a certain amount relative to the shape and size of the longitudinal groove 7. An appropriate offset is between 0.001 mm and 1.0 mm.

[0078] After applying adhesive material 9 to the dental socket 2 and the longitudinal groove 7 in the shape of the dental arch, the reinforcing structure 8 is embedded, and then the artificial tooth 1 is further embedded on it, thereby achieving the bonding of the artificial tooth 1 and the integration of the reinforcing structure 8 with the denture base 3. Here, the adhesive material 9 used after embedding the reinforcing structure 8 can be, for example, an acrylic room-temperature polymerized resin, or, when the denture base 3 is shaped using a 3D printer, its liquid material can be used. Furthermore, if the reinforcing structure 8 is made of metal and the adhesion to the denture base material is insufficient, a metal primer can be used, depending on the material, to more firmly ensure the adhesion between the denture base 3 and the reinforcing structure 8. For example, a known primer can be used as the metal primer. It should be noted that when the applied adhesive material 9 is an acrylic room-temperature polymerized resin, the adhesive material 9 is cured by being left to stand for a specified time. Furthermore, when the applied adhesive material 9 is a liquid material used in 3D printers, it is cured by light irradiation by a light irradiation device.

[0079] Like this, Figure 1 and Figure 2 The example includes a denture base 100 comprising a denture base 3, an adhesive material 9, a reinforcing structure 8, and an artificial tooth 1. A concave socket 2 is formed in the denture base 3. Furthermore, a longitudinal groove 7 is formed on the bottom surface (base surface 6) of the socket 2. The adhesive material 9 is disposed in the socket 2 and the longitudinal groove 7. The reinforcing structure 8 is disposed within the longitudinal groove 7 and embedded in the adhesive material 9. The artificial tooth 1 is disposed in the socket 2 and is bonded by the adhesive material 9.

[0080] It should be noted that the above-mentioned denture with basement 100 is an example, and this disclosure is not limited to this method.

[0081] Figure 3 This example illustrates a reinforced, one-piece embedded denture 100, where a dental stainless steel alloy reinforcing core is used in the reinforcing structure 8. It should be noted that... Figure 3 The illustration of adhesive material 9 is omitted. Figure 3 In the example shown, the reinforcing structure 8 is made of dental stainless steel alloy with a rectangular cross-section and a plate shape. The readily available reinforcing core is cut to the required size and then processed by bending, thus eliminating the need to design and manufacture the reinforcing structure 8, and allowing for the simple fabrication of the embedded denture 100.

[0082] It should be noted that the shape of the reinforcing structure 8 is not particularly limited as long as it is within the middle part 5 of the denture base 3 that connects the tooth socket 2 and the mucosal surface 4. It can be a structure manufactured with pre-standardized size and shape, a structure cast with arbitrary shape or thickness, a structure machined by cutting, or a structure formed by layering.

[0083] Figure 4 Another example is the denture base 3 of the denture base 100, shown as a top view before the reinforcing structure 8 and the artificial tooth 1 are embedded. Furthermore, in Figure 4In the example shown, viewed from the base surface 6 of the prosthesis base 3 towards the mucosal surface 4, i.e., from a top view, the longitudinal groove 7 is shaped like an arch of teeth, i.e., U-shaped. The mesiodistal width W1 of the longitudinal groove 7 includes at least six parts of the anterior portion: the left and right central incisors, lateral incisors, and canines, and extends to a length of more than half the mesiodistal width of the last molar portion 10. Moreover, the width W2 of the longitudinal groove 7 on the labial or buccal surface is 1.5 mm to 15.0 mm, preferably 2.0 mm to 12.0 mm. Furthermore, a reinforcing structure 8 is disposed in the longitudinal groove 7. Therefore, the mesiodistal width W1 of the reinforcing structure 8 includes at least six parts of the anterior portion: the left and right central incisors, lateral incisors, and canines, and extends to a length of more than half the mesiodistal width of the last molar portion 10. Furthermore, the diameter W2 of the reinforcing structure 8 on the labial or buccal surface is 1.5 mm to 15.0 mm, preferably 2.0 mm to 12.0 mm. Here, the mesiodistal diameter W1 means the distance between two points perpendicular to the crown axis where the distance between the mesial and distal surfaces is the greatest. The diameter W2 on the labial or buccal surface W2 means the distance between two points perpendicular to the crown axis where the distance between the labial surface of the anterior teeth or the buccal surface of the molars is the greatest. The last molar portion refers to the portion of the molars at the end of the dental arch; in the case of a typical complete denture with a base, it refers to the second molar portion. However, considering the case where there is no space for the second molar portion in a denture with a base, and the first molar portion becomes the end of the dental arch, or the case where the premolar portion becomes the end of the dental arch in a partial denture with a base, the last molar portion 10 in the description of the present invention refers to the molar at the very end of the artificial tooth 1 implanted in the denture base 3. That is, the last molar portion 10 refers to any one of the first premolar portion, the second premolar portion, the first molar portion, and the second molar portion.

[0084] The mesial and distal diameter W1 of the reinforcing structure 8 extends to the last molar portion 10 and defines the diameter W2 on the labial or buccal surface, thereby improving the fracture resistance of the denture 100.

[0085] Figure 5 Indicates to Figure 4The diagram shows a top view of the denture base 3, with the reinforcing structure 8 and artificial tooth 1 embedded therein. For clarity, the left side of the diagram shows the state with the reinforcing structure 8 embedded, and the right side shows the state with the artificial tooth 1 finally embedded after the reinforcing structure 8 has been installed. When embedding the reinforcing structure 8 into the denture base 3, adhesive material 9 is pre-applied to the inner surfaces of the arch-shaped longitudinal groove 7 and the socket 2. Next, as shown on the left side of the denture base 100, the reinforcing structure 8 is embedded, followed by the artificial tooth 1 as shown on the right side of the denture base 100. It should be noted that adhesive material 9 can also be applied additionally as needed, after the reinforcing structure 8 is embedded but before the artificial tooth 1 is embedded. After the artificial tooth 1 is embedded, the adhesive material 9 is cured, thereby achieving bonding between the artificial tooth 1 and the denture base 3, and integration between the reinforcing structure 8 and the denture base 3. Furthermore, by placing the reinforcing structure 8 within the socket 2 of the artificial tooth 1, the reinforcing structure 8 does not affect the appearance of the denture 100 and can also solve the aforementioned aesthetic problem.

[0086] Like this, in Figure 4 and Figure 5 In the example shown, the artificial tooth 1 includes at least six parts: the left and right central incisors, lateral incisors, and canines of the anterior portion. The longitudinal groove 7 is formed in the shape of an arched tooth. The mesiodistal diameter W1 of the reinforcing structure 8 is more than half the mesiodistal diameter of the molar portion 10. The diameter W2 of the reinforcing structure 8 on the labial or buccal surface is more than 1.5 mm and less than 15.0 mm.

[0087] Figure 6 A side view of denture basement 100 is shown as another example. Figure 6 In the example shown, the denture 100 is a partial denture with a base, and a small connector 11 is included at the end of the reinforcing structure 8. The small connector 11 generally refers to a structure that connects the lingual bar, paratal bar, or other large connectors of the partial denture base 3 to the retaining devices 14 of the partial denture base, such as clasps and rests. Figure 6 In the example shown, the longitudinal groove 7 extends through the side of the denture base 3 in the direction of the artificial teeth 1. Therefore, the end of the reinforcing structure 8 protrudes from the side of the denture base 3. The small connecting member 11 is provided at the end of the reinforcing structure 8 and protrudes from the denture base 3.

[0088] The shape of the tip of the small connector 11 is not particularly limited, and a known retaining device can also be used. As shown in the figure, the shape from the reinforcing structure 8 to the clasp and support can be integrally manufactured. By including the small connector 11, the reinforcing structure 8 and the retaining device 14 can be integrated. As a more robust reinforcing structure, it can prevent denture breakage caused by deformation of the retaining device 14.

[0089] Like this, in Figure 6 In the example shown, the denture 100 is a partial denture, and the reinforcing structure 8 has a small connecting member 11 connected to the holding device 14 that holds the denture 100.

[0090] Figure 7 This is a sectional view, taken from the side, showing the state of the denture base 3 embedded in the reinforcing structure 8 in another example. It should be noted that... Figure 7 The illustration of adhesive material 9 is omitted. Figure 7 In the example shown, after determining the shape of the reinforcing structure 8 and its embedding position in the denture base 3, a rib-shaped opening is formed in the implantation direction of the artificial tooth 1, creating a longitudinal groove 7 in the shape of an arch of teeth. At this time, the longitudinal groove 7 in the shape of an arch of teeth can also be configured with an offset shape, partially or entirely having a suitable gap 12, depending on the manufacturing tolerances of the embedded reinforcing structure 8, the denture base 3, and both. For example, the size of the gap 12 is 0.001 mm to 1.0 mm, preferably 0.01 mm to 0.1 mm. The size of the gap 12 refers to the distance between the denture base 3, the reinforcing structure 8, and the inner wall 7a of the defined longitudinal groove 7 when viewed from the side. This ensures sufficient space for applying the adhesive material 9 between the reinforcing structure 8 and the longitudinal groove 7 in the shape of an arch of teeth.

[0091] Furthermore, the gap 12 can be set with a substantially uniform thickness relative to the reinforcing structure 8, such as... Figure 7 As shown, the gap 12 can also be partially omitted and contact the reinforcing structure 8 can be made, or the gap 12 can be made with a narrower dimension than the surrounding area. This can improve the accuracy of the embedding position of the reinforcing structure 8 relative to the longitudinal groove 7 of the tooth arch shape, and suppress the generation of stress caused by the curing shrinkage of the adhesive material 9 and the deformation of the denture base 3.

[0092] To explain in detail, in Figure 7In the example shown, the reinforcing structure 8 is separated from the inner wall 7a of the longitudinal groove 7. The inner wall 7a includes the bottom surface and sidewalls of the longitudinal groove 7. An adhesive material 9 is disposed between the reinforcing structure 8 and the inner wall 7a. That is, the reinforcing structure 8 is embedded in the adhesive material 9 and is separated from the inner wall 7a of the longitudinal groove 7. The distance between the reinforcing structure 8 and the inner wall 7a is 0.001 mm to 1.0 mm, preferably 0.01 mm to 0.1 mm. In other words, the thickness of the adhesive material 9 disposed between the reinforcing structure 8 and the inner wall 7a is 0.001 mm to 1.0 mm, preferably 0.01 mm to 0.1 mm.

[0093] Like this, in Figure 7 In the example shown, at least a portion of the reinforcing structure 8 extends from the inner wall 7a of the longitudinal groove 7 by a range of 0.001 mm to 1.0 mm. Externally, an adhesive material 9 is applied between at least a portion of the reinforcing structure 8 and the inner wall 7a of the longitudinal groove 7. Thus, the reinforcing structure 8 can be securely fixed to the denture base 3 by the adhesive material 9. It should be noted that "at least a portion of the reinforcing structure 8" can mean either the entire reinforcing structure 8 or a portion thereof. Figure 7 In the example shown, a portion of the reinforcing structure 8 is positioned away from the sidewall of the longitudinal groove 7, and an adhesive material 9 is applied between the portion of the reinforcing structure 8 and the sidewall of the longitudinal groove 7. Furthermore, the remaining portions of the reinforcing structure 8 are in contact with the bottom surface of the longitudinal groove 7 and are not coated with adhesive material 9.

[0094] exist Figure 7 In the example shown, a protrusion 13 is provided on the inner wall 7a of the longitudinal groove 7. A portion of the reinforcing structure 8 can contact the protrusion 13 on the inner wall 7a of the longitudinal groove 7. Specifically, a protrusion 13 is provided on the bottom surface of the longitudinal groove 7. Viewed from the side, the cross-section of the protrusion 13 is generally rectangular. The protrusion 13 protrudes from the bottom surface of the longitudinal groove 7 by 0.001 mm to 1.0 mm. Preferably, the protrusion 13 protrudes by 0.01 mm to 0.1 mm. Viewed from the side, the protrusion 13 has a width dimension smaller than the width dimension of the reinforcing structure 8. Furthermore, viewed from the side, the cross-section of the upper surface of the protrusion 13 can be formed as concave. Viewed from the base surface 6 of the denture base 3 toward the mucosal surface 4, i.e., in a top view, the protrusion 13 is set in an arch shape, i.e., U-shaped. The protrusion 13 can be a single continuous protrusion or multiple protrusions arranged side by side. A reinforcing structure 8 is disposed on the upper surface of the protrusion 13.

[0095] It should be noted that the example described is of the protrusion 13 being provided on the bottom surface of the longitudinal groove 7, but this is not a limitation. The protrusion 13 may also be provided on the side wall defining the longitudinal groove 7. For example, protrusions 13 may be provided on two opposing side walls defining the longitudinal groove 7. In this way, by providing protrusions 13 on the inner wall 7a of the longitudinal groove 7, the accuracy of the embedding position of the reinforcing structure 8 can be improved. Furthermore, it can suppress the generation of stress caused by the curing shrinkage of the adhesive material 9 and the deformation of the denture base 3.

[0096] Like this, in such Figure 7 In the example shown, a protrusion 13 is provided on the inner wall 7a of the longitudinal groove 7. The protrusion 13 contacts the reinforcing structure 8. It should be noted that the protrusion 13 is not a necessary component. In addition, the protrusion 13 can also be formed by a component that is different from the bottom surface of the longitudinal groove 7.

[0097] Figure 8 A flowchart illustrates the design process of a denture base 100 based on a computer-aided design and manufacturing (CAD / CAM) program. Figure 8 In the example shown, the design process (CAD) of the denture base 100 includes not only the process of designing the gingival portion of the denture base 3 by three-dimensional measurement of the intraoral shape and occlusal base, but also the process of designing the reinforcing structure 8 P1 and the opening of the longitudinal groove 7 in the shape of the dental arch.

[0098] The design of the reinforcing structure 8 is as described above. That is, the position is determined by the arrangement of the artificial teeth 1 on the mucosal surfaces of the maxilla or mandible, obtained through three-dimensional measurement of the patient's oral cavity shape. This determines the space available for designing the reinforcing structure 8. Therefore, any reinforcing structure 8 and longitudinal grooves 7 in the shape of the dental arch can be designed, and the size and shape can be arbitrary as needed. Furthermore, during the design phase P1 of the reinforcing structure 8, a choice is made between using a pre-existing reinforcing core or fabricating a custom-made reinforcing structure 8 corresponding to the denture base shape for each case.

[0099] When using off-the-shelf products, information such as shape and size is pre-registered in a database to determine the shape of the dental arch that should be curved and the embedding position. Furthermore, when fabricating a customized reinforcing structure 8 corresponding to the denture base shape for each case, the shape of the reinforcing structure 8 is layered using a 3D printer, embedded in dental embedding material, and appropriately selected methods for casting dental alloys and machining dental resin discs reinforced with glass fiber are employed.

[0100] Next, for the opening of the longitudinal groove 7 in the shape of the dental arch, the shape model of the reinforcing structure 8, or its offset shape model, is removed from the gingival portion of the grinding surface of the designed denture base 3 in a shape extending along the implantation direction of the artificial tooth. This allows for the design of the shape of the denture base 3 into which the reinforcing structure 8 can be embedded. For the opening of the fossa 2, as is known, it can be formed by removing the shape of the artificial tooth 1 from the gingival portion of the grinding surface of the designed denture base 3. There is no particular order of priority for the steps of opening the longitudinal groove 7 in the shape of the dental arch and opening the fossa 2; the opening of the longitudinal groove 7 in the shape of the dental arch can be performed after the opening of the fossa 2.

[0101] use Figure 9 An example of a method for manufacturing a denture with a base plate 100 will be described. Figure 9 This is an illustrative flowchart of a manufacturing method for a denture base 100. Figure 9 In the example shown, the manufacturing method of the denture base 100 includes steps ST1 to ST4. It should be noted that step ST1 is a process executed by a computer or control device. The computer or control device includes one or more processors and a memory storing the commands executed by the one or more processors.

[0102] Step ST1 is the process of fabricating a denture base 3 with a tooth socket 2 and a longitudinal groove 7. Specifically, in step ST1, a denture base 3 is fabricated, which has a concave tooth socket 2 and a longitudinal groove 7 formed on the bottom surface of the tooth socket 2. Step ST1 may also include steps ST11 and ST12.

[0103] Step ST11 is the process of obtaining design data for the denture base 3, which forms the tooth socket 2 and longitudinal groove 7. For example, in step ST11, this can be achieved by implementing... Figure 8 The design process (CAD) for the denture base 3 is shown to obtain the design data. Alternatively, in step ST11, the design data of the already designed denture base 3 can also be obtained via the network. For example, in step ST11, the design data of the denture base 3 can also be obtained from a server connected to a computer via the network.

[0104] Step ST12 is the process of fabricating the denture base 3 based on the design data. In step ST12, by implementing... Figure 8 The denture base 3 is manufactured in the automatic generation (P2) step of the denture fabrication process (CAM). For example, in step ST12, the denture base 3 is manufactured based on design data through cutting by an NC machine tool, layering modeling by a 3D printer, etc.

[0105] Step ST2 is the process of applying adhesive material 9 to the socket 2 and longitudinal groove 7. There are no particular limitations on the method of this process; simply apply adhesive material 9 to the socket 2 and longitudinal groove 7 according to known methods of using adhesive materials.

[0106] Step ST3 is the process of embedding the reinforcing structure 8 into the longitudinal groove 7 coated with the adhesive material 9. For example, in step ST3, the reinforcing structure 8 is embedded into the longitudinal groove 7 before the adhesive material 9 cures. Furthermore, step ST3 may also include a process of positioning at least a portion of the reinforcing structure 8 at a position 0.001 mm to 1.0 mm away from the inner wall 7a of the defined longitudinal groove 7. Additionally, if the inner wall 7a of the longitudinal groove 7 has a protrusion 13, a portion of the reinforcing structure 8 may be made to contact the protrusion 13.

[0107] Step ST4 is the process of placing the artificial tooth 1 into the tooth socket 2 coated with adhesive material 9. For example, in step ST4, the base 1a of the artificial tooth 1 is placed in the tooth socket 2 coated with adhesive material 9. Thus, the base 1a of the artificial tooth 1 is bonded to the tooth socket 2 by adhesive material 9.

[0108] After step ST4, the artificial tooth 1 can also be positioned relative to the denture base 3 until the adhesive material 9 cures. With the curing of the adhesive material 9, the artificial tooth 1 and the reinforcing structure 8 are fixed relative to the denture base 3.

[0109] By performing steps ST1 to ST4 above, a denture with a base 100 can be manufactured. It should be noted that the above method for manufacturing the denture with a base 100 is an example and is not limited to it. The method for manufacturing the denture with a base 100 can also involve adding, deleting, merging, or splitting steps.

Claims

1. A method for manufacturing a denture with a base, comprising: The step of making a denture base (3) is that the denture base (3) has a concave tooth socket (2) and a longitudinal groove (7) is formed on the bottom surface of the tooth socket (2); The step of applying adhesive material (9) to the tooth socket (2) and the longitudinal groove (7); The step of embedding the reinforcing structure (8) into the longitudinal groove (7) coated with the adhesive material (9) is wherein the reinforcing structure (8) is disposed only within the middle part (5) of the denture base (3) that connects the tooth socket (2) and the mucosal surface (4); as well as The step of placing the artificial tooth (1) into the tooth socket (2) coated with the adhesive material (9) The aforementioned denture with a base is a partial denture with a base. The reinforcing structure (8) has a small connector (11) that connects to the retaining device (14) for maintaining the denture base. The longitudinal groove (7) extends through the side of the denture base (3) in the direction of the arrangement of the artificial teeth (1), and the small connecting member (11) is located at the end of the reinforcing structure (8) and protrudes from the denture base (3).

2. The method for manufacturing a denture with a base according to claim 1, wherein, The artificial tooth (1) includes at least six parts: the left and right central incisors, the lateral incisors, and the canines of the anterior teeth. The longitudinal groove (7) and the reinforcing structure (8) are formed in a toothed bow shape. The mesial-distal diameter (W1) of the longitudinal groove (7) and the reinforcing structure (8) is more than 1 / 2 of the mesial-distal diameter of the molar portion (10). The longitudinal groove (7) and the reinforcing structure (8) have a diameter (W2) of 1.5 mm or more and 15.0 mm or less on the lip or cheek.

3. The method for manufacturing a denture with a base according to claim 1 or 2, wherein, The step of embedding the reinforcing structure (8) includes: positioning at least a portion of the reinforcing structure (8) at a position that is more than 0.001 mm away from the inner wall (7a) of the longitudinal groove (7) and less than 1.0 mm away.

4. The method for manufacturing a denture with a base according to claim 1 or 2, wherein, The steps for fabricating the denture base (3) include: Obtain design data for a denture base (3) having the socket (2) and the longitudinal groove (7) formed thereon; and Based on the design data, the denture base (3) is fabricated.

5. A denture with a base, possessing: The denture base (3) has a concave tooth socket (2) and a longitudinal groove (7) is formed on the bottom surface of the tooth socket (2); Adhesive material (9) is applied to the tooth socket (2) and the longitudinal groove (7); A reinforcing structure (8) is disposed within the longitudinal groove (7) and the adhesive material (9) is embedded therein; and Artificial teeth (1) are disposed in the tooth socket (2) and bonded by the adhesive material (9). The reinforcing structure (8) is disposed only within the middle portion (5) of the denture base (3) that connects the tooth socket (2) and the mucosal surface (4). The aforementioned denture with a base is a partial denture with a base. The reinforcing structure (8) has a small connector (11) that connects to the retaining device (14) for maintaining the denture base. The longitudinal groove (7) extends through the side of the denture base (3) in the direction of the arrangement of the artificial teeth (1), and the small connecting member (11) is located at the end of the reinforcing structure (8) and protrudes from the denture base (3).

6. The denture with a base as described in claim 5, wherein, The artificial tooth (1) includes at least six parts: the left and right central incisors, the lateral incisors, and the canines of the anterior teeth. The longitudinal groove (7) and the reinforcing structure (8) are formed in a toothed bow shape. The mesial-distal diameter (W1) of the longitudinal groove (7) and the reinforcing structure (8) is more than 1 / 2 of the mesial-distal diameter of the molar portion (10). The longitudinal groove (7) and the reinforcing structure (8) have a diameter (W2) of 1.5 mm or more and 15.0 mm or less on the lip or cheek.

7. The denture with a base as described in claim 5 or 6, wherein, At least a portion of the reinforcing structure (8) is located 0.001 mm to 1.0 mm away from the inner wall (7a) defining the longitudinal groove (7). The adhesive material (9) is applied between at least a portion of the reinforcing structure (8) and the inner wall (7a) defining the longitudinal groove (7).

8. The denture with a base as described in claim 7, wherein, A protrusion (13) is provided on the inner wall (7a) of the longitudinal groove (7). The protrusion (13) is in contact with the reinforcing structure (8).

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