Complete denture processing technology and manufactured complete denture

Abstract

The invention relates to the field of denture processing, and particularly discloses a complete denture processing technology and a manufactured complete denture, the processing technology comprises the following steps: S1, reconstructing a complete denture three-dimensional model according to oral scanning data or tray data, and reserving a groove for embedding a metal net in an edentulous jaw base tissue surface of the three-dimensional model, the model output is made of a resin material and is cut to form a false tooth initial blank; s2, putting a metal net matched with the groove in the groove of the false tooth initial blank, and then filling glue into the metal net, embedding and curing to form a sandwich structure of a resin layer, the metal net and the resin layer; s3, cutting the primary denture blank embedded with the metal net again to obtain the complete denture, and embedding the metal net in the middle of the denture base resin of the complete denture; the invention further discloses the complete denture manufactured through the machining technology, the bending strength of the complete denture is further improved, and then the service life of the complete denture is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of denture processing, and more specifically, to a full denture processing technology and the prepared full denture. Background Art

[0002] Complete dentures are removable dentures made of artificial materials, which are used to replace the complete maxillary or mandibular dentition and related tissues of edentulous patients to restore the patient's chewing, pronunciation and facial appearance functions. Complete dentures are composed of artificial teeth and bases. The denture base is closely fitted with the edentulous jaw mucosal tissue and the adsorption force and atmospheric pressure generated by the edge closure make the denture adsorbed on the upper and lower alveolar ridges, restore the patient's defective tissue and facial appearance, and restore the chewing and pronunciation functions. The mucoperiosteum and bone tissue covered by the denture base bear the occlusal pressure of the denture.

[0003] According to different materials, the widely used full dentures mainly include metal frame full dentures and acrylic full dentures, among which metal frame full dentures use metal as the frame material to improve the stability and durability of the denture and are widely used. The preparation method of metal frame full dentures includes the following steps: preparing a metal frame model according to the oral model and occlusal relationship design, and then making a mold according to the designed metal frame, the mold is made of resin and other materials and is consistent with the final shape of the metal frame, and then injecting molten metal such as titanium alloy into the mold, and taking it out after the metal cools and solidifies to obtain a rough blank of the metal frame, and then grinding and polishing the rough blank, and then arranging artificial teeth on the metal frame to obtain a metal frame full denture, but because metal frame full dentures are mainly made of titanium alloy, pure titanium and other metals, the price is relatively high.

[0004] Acrylic brackets are usually made of acrylic resin materials, which have simple manufacturing processes, relatively low prices, and can mimic natural teeth in color and texture. However, full dentures made of resin materials have low strength, especially low bending strength, are easily deformed or even broken, have a short service life, and require high replacement frequency. Further improvements are needed to increase the service life of dentures. Summary of the invention

[0005] In order to improve the strength of complete dentures, the present application provides a complete denture processing technology and the prepared complete dentures.

[0006] In a first aspect, the present application provides a complete denture processing technology, which adopts the following technical solution: A complete denture processing process comprises the following steps: S1. Reconstruct a three-dimensional model of the full denture according to the oral scan data or the tray data, and reserve a groove for pre-embedded metal mesh on the edentulous jaw base tissue surface of the three-dimensional model. Then, the model output is made of resin material and cut to form a denture blank; S2, placing a matching metal mesh into the groove of the denture blank, and then embedding the metal mesh with glue, and curing it to form a sandwich structure of resin layer, metal mesh, and resin layer; S3, cutting the denture blank embedded with the metal mesh again to obtain a full denture, wherein the base resin of the full denture has the metal mesh embedded in the middle.

[0007] By adopting the above technical scheme, a metal mesh is embedded in the tissue surface of the resin base in the present application, which can significantly improve the bearing capacity and anti-fracture performance of the base. During the chewing process, the denture needs to withstand the bite force from all directions. The addition of the metal mesh effectively disperses the bite force and prevents the base from breaking. Moreover, the combination of the metal mesh and the resin base forms a more stable overall structure, which can not only increase the retention force of the denture and make it fit more stably in the oral cavity, but also reduce the loosening or falling off of the denture caused by deformation of the base. Moreover, the addition of the metal mesh significantly improves the strength and stability of the base, which can extend the service life of the denture. Moreover, in the present application, the full denture base is embedded with a metal mesh in the base, which significantly simplifies the production process compared to the metal bracket full denture, reduces costs, and also significantly improves the strength of the resin base, increases the service life of the full denture, and effectively prevents the resin base from breaking during chewing.

[0008] In addition, the metal mesh is embedded in the resin base of the present application and then filled with glue to embed it, so that the metal mesh can play a reinforcing role while not being exposed and not in contact with oral tissue, thus avoiding patient allergies caused by metal ions such as nickel and chromium released by metal dentures, making it safer and more compatible.

[0009] Optionally, the specific operation in step S2 is to place a metal mesh in the tree groove of the denture blank and then fill it with denture base resin, and then put it into 45-70°C water for curing for 10-40 minutes after it is allowed to stand.

[0010] By adopting the above technical solution, in this application, a metal mesh is directly placed in the groove of the denture blank, so that the metal mesh fits the tissue surface of the edentulous jaw base, and then the denture base resin (dental base powder) is used to fill the glue, solidify and shape, and realize the embedding of the metal mesh, forming a sandwich structure of resin layer, metal mesh, and resin layer. The metal mesh is embedded in the resin base, which plays a reinforcing role while not directly contacting the oral tissue, avoiding allergies caused by metal ions, and the embedding operation method of the metal mesh and the base is simpler and more convenient than the strip mold casting method. In addition, in this application, the surface of the denture blank is directly filled with glue after the metal mesh is embedded. The cutting in step S1 and the subsequent processing cutting can be realized by digital processing technology. The process in this application can first use digital processing technology to cut out the denture blank, and then embed the metal mesh and fix it and then cut it into a finished denture, realizing the digital cutting process of the denture containing the metal mesh, which is more efficient.

[0011] Optionally, the metal mesh is made of one or more of titanium alloy, nickel-chromium alloy, and cobalt-chromium alloy.

[0012] Optionally, the surface of the groove reserved in S1 is reserved with a plurality of protrusions matching the metal mesh holes. By adopting the above technical solution, the protrusions on the surface of the groove reserved on the tissue surface of the edentulous jaw base can match the holes of the metal mesh, thereby achieving the fixation of the metal mesh and the tissue surface of the edentulous jaw base.

[0013] Optionally, the cutting in step S1 and step S3 is both achieved through a digital process.

[0014] Optionally, the denture base resin in step S2 is a methyl methacrylate homopolymer.

[0015] By adopting the above technical solution, methyl methacrylate homopolymer is used as the denture base resin, which has better biocompatibility and is a widely used raw material for dentures, and the raw material source is wide and easy to obtain.

[0016] Optionally, the denture base resin in step S2 comprises the following raw materials in parts by weight: 3-5 parts of polyetheretherketone, 3-8 parts of carbon fiber, 2-5 parts of MBS resin and 20-35 parts of self-curing denture base powder, wherein the carbon fiber is modified by loading carbon nanotube-maleic anhydride-hydroxyethyl acrylate composite filler to obtain modified carbon fiber and then added.

[0017] By adopting the above technical scheme, when the tooth tray powder is used for filling the edentulous jaw base tissue surface in the present application, the tooth tray powder product is mainly made of methyl methacrylate copolymer as a raw material, and MBS resin and polyetheretherketone are added on this basis in the present application. Polyetheretherketone has excellent biocompatibility, and also has high strength, high modulus and excellent wear resistance and certain antibacterial properties, which can reduce bacterial growth and reproduction. The addition of polyetheretherketone and carbon fiber can significantly improve the strength of the denture, improve its bearing capacity and durability, and the addition of MBS resin as methyl The methyl acrylate-butadiene-styrene terpolymer can form a bridge between PEEk and polymethyl methacrylate PMMA, reduce the interfacial tension, and improve the compatibility between polyetheretherketone peek and polymethyl methacrylate, so that the denture base resin raw material is more evenly dispersed, which can play a better reinforcing role. It can also play a role in strengthening and toughening, effectively enhancing the impact resistance of the filling layer, preventing damage or falling off due to external force impact during subsequent use, and can also improve wear resistance and further extend the service life of the base.

[0018] In addition, what is more important is that Peek and carbon fiber, as solid fillers, increase the roughness of the glue layer when the self-curing denture tray powder is filled with glue, which not only helps to improve the bonding strength between the filling layer and the denture blank, but also helps to improve the fixing effect between the metal mesh, thereby making the metal mesh more firmly fixed. Moreover, PEEK and carbon fiber can be more evenly dispersed in the denture tray powder system, with higher overall stability, which is beneficial to improving the overall strength and service life of the denture.

[0019] Optionally, the modified carbon fiber is prepared by the following method: 1) First, the carbon nanotubes are acidified and soaked in a nitric acid solution, then washed with water and dried; 2) Mix maleic anhydride, initiator benzoyl peroxide and solvent dimethylformamide, then add the carbon nanotubes pretreated in step 1), heat to 65-80°C for reaction for 1-2h, then add hydroxyethyl acrylate, continue to react for 1-2h, let stand and precipitate, then filter, dry and wash to obtain a composite filler; 3) Evenly coating the zinc polycarboxylate cement on the surface of the carbon fiber, then evenly spreading the composite filler prepared in step 2) on the surface of the carbon fiber coated with the zinc polycarboxylate cement, and then drying and curing to obtain the modified carbon fiber.

[0020] By adopting the above technical scheme, the carbon fiber in the present application is loaded with composite fillers. On the one hand, the addition of carbon fiber loaded with composite fillers increases the surface roughness, which is beneficial to the tight fixation of the metal mesh and the edentulous jaw base tissue surface. In addition, the carbon nanotubes in the present application are firstly subjected to acidification treatment to introduce oxygen-containing functional groups, and then are grafted with maleic anhydride, and then hydroxyethyl acrylate is added to polymerize with maleic anhydride to achieve the modification of the carbon nanotubes. On the one hand, the carbon nanotube nanoparticles can serve as a bridge between polyetheretherketone and MBS resin and polymethyl methacrylate to improve the compatibility. On the other hand, after the polymerization of hydroxyethyl acrylate and maleic anhydride monomers, they interact with the polymer to reduce the interfacial tension, improve the compatibility, and also improve the compatibility with polymethyl methacrylate, ultimately significantly improving the stability and compatibility of the denture resin base material, which is beneficial to improve the fixation of the metal mesh and the edentulous jaw base tissue surface, and the denture finally formed has better strength and stability.

[0021] Optionally, when preparing modified carbon fibers, the mass ratio of maleic anhydride to carbon nanotubes in step 2) is 1:(3-5), the amount of initiator added is 1-3wt% of the amount of maleic anhydride added, the amount of solvent added is 3-5 times the mass of the amount of maleic anhydride added, and the mass ratio of hydroxyethyl acrylate to maleic anhydride is 1:(0.8-1.2); In step 3), the amount of zinc polycarboxylate cement added is 5-10wt% of the amount of carbon fiber added, and the mass ratio of the composite filler to the carbon fiber added is 1:(2-3).

[0022] Optionally, in step 2), the initiator is benzoyl peroxide and the solvent is dimethylformamide.

[0023] In a second aspect, the present application provides a complete denture, which adopts the following technical solution: A complete denture is manufactured by the processing technology described above.

[0024] By adopting the above technical solution, the complete denture prepared by the method provided by the present application has a metal mesh embedded on the tissue surface of the edentulous jaw base. Compared with the denture made of only resin material, the denture in the present application significantly improves its strength and increases the service life of the complete denture. In summary, this application has the following beneficial effects: 1. In the present application, a groove for pre-embedded metal mesh is first reserved on the tissue surface of the edentulous jaw base, and then a matching metal mesh is placed in the groove, and then polymethyl methacrylate is used for filling and curing to achieve the embedding of the metal mesh on the tissue surface of the base, which significantly improves the strength of the denture and the service life of the denture. In addition, the embedding operation method of the metal mesh and the base is simpler and more convenient than the strip mold casting method; 2. The metal mesh is embedded in the resin base of the present application and then filled with glue to embed it, so that the metal mesh plays a reinforcing role while not being exposed and not in contact with oral tissue, thus avoiding the patient's allergic reaction caused by metal ions such as nickel and chromium released by metal dentures, making it safer and more compatible; 3. In the present application, the metal mesh is directly embedded on the surface of the rough mold and then filled with glue. The cutting of the rough mold in step S1 and the subsequent processing and cutting can be achieved through digital processing technology. The process in the present application can first use digital processing technology to cut out the rough mold, and then embed the metal mesh and fix it and then cut it into a finished denture again, realizing the digital cutting process of the denture containing the metal mesh, which is more efficient and improves the degree of automation; 4. In the present application, the protrusions on the tissue surface of the edentulous jaw base can be matched with the holes of the metal mesh, thereby achieving the fixation of the metal mesh and the tissue surface of the edentulous jaw base. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a picture of the complete denture prepared in Example 1 of the present application; Figure 2 This is a picture of the full denture in comparative example 1 of the present application. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the examples. It is particularly noted that if no specific conditions are specified in the following examples, the experiments are carried out according to conventional conditions or the conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following examples can be obtained from common commercial sources.

[0027] The methyl methacrylate homopolymer in the present application specifically adopts self-curing dental tray powder.

[0028] In the following examples, the self-curing dental tray powder is composed of a powder and a liquid. The powder mainly includes a methyl methacrylate copolymer, a small amount of initiator benzoyl peroxide and a trace amount of pigment are added, and the liquid is composed of methyl methacrylate, N, N-dihydroxypropyl p-toluidine, and 2,6-di-tert-butyl-4-methylphenol. The flexural strength of the polymer is not less than 60Mpa; the flexural elastic modulus value is not less than 1500MPa; the residual methyl methacrylate monomer content (mass fraction) is not higher than 4.5%; the increase in unit volume (water absorption) should not exceed 32μg / mm 3 ; The reduction value of unit volume mass (dissolved substance) should not exceed 8.0μg / mm 3 In the following examples, the MBS resin used is MBS resin with the brand name M-722.

[0029] Example 1 A complete denture processing process comprises the following steps: S1. Collect metal data based on oral scan data (use an oral scanner to accurately scan the patient's oral cavity to obtain a three-dimensional digital model of the oral cavity including teeth, gums, alveolar bones, etc.) or tray data (traditional tray production and impression acquisition, and then convert it into a digital model), and then reconstruct a full denture three-dimensional model (including tooth shape, size, arrangement, and contours of gums and alveolar bones) based on the collected data, and reserve a groove for pre-embedded metal mesh on the edentulous jaw base tissue surface of the three-dimensional model to ensure that the metal mesh can be embedded in the denture, and then output the model (output the verified three-dimensional model to a 3D printer or CAM system) using methyl methacrylate resin material to form a denture blank after cutting; S2. Place a matching metal mesh in the groove of the denture blank, and then use the powder and liquid in the self-curing dental tray powder to prepare a mixture in a weight ratio of 2:1 to fill the metal mesh with glue, let it stand for 30 minutes, and then put it into 55°C water for curing for 30 minutes to achieve the embedding of the metal mesh to form a sandwich structure of resin layer, metal mesh, and resin layer, wherein the metal mesh is a titanium alloy metal mesh; S3, cutting the denture blank with the metal mesh again to obtain a full denture, wherein the base resin of the full denture has a metal mesh embedded in the middle, wherein the full denture is referred to Figure 1 .

[0030] Example 2 A complete denture processing process comprises the following steps: S1. Collect metal data based on oral scan data (use an oral scanner to accurately scan the patient's oral cavity to obtain a three-dimensional digital model of the oral cavity including teeth, gums, alveolar bones, etc.) or tray data (traditional tray production and impression acquisition, and then convert it into a digital model), and then reconstruct a full denture three-dimensional model (including tooth shape, size, arrangement, and contours of gums and alveolar bones) based on the collected data, and reserve a groove for pre-embedded metal mesh on the edentulous jaw base tissue surface of the three-dimensional model to ensure that the metal mesh can be embedded in the denture, and then output the model (output the verified three-dimensional model to a 3D printer or CAM system) using methyl methacrylate resin material to form a denture blank after cutting; S2. Place a matching metal mesh in the groove of the denture blank, and then use the powder and liquid in the self-curing dental tray powder to prepare a mixture in a weight ratio of 2:1 to fill the metal mesh with glue, let it stand for 20 minutes, and then put it into 45°C water for curing for 40 minutes to achieve the embedding of the metal mesh to form a sandwich structure of resin layer, metal mesh, and resin layer, wherein the metal mesh is a titanium alloy metal mesh; S3, cutting the denture blank embedded with the metal mesh again to obtain a full denture, wherein the base resin of the full denture has the metal mesh embedded in the middle.

[0031] Example 3 A complete denture processing process comprises the following steps: S1. Collect metal data based on oral scan data (use an oral scanner to accurately scan the patient's oral cavity to obtain a three-dimensional digital model of the oral cavity including teeth, gums, alveolar bones, etc.) or tray data (traditional tray production and impression acquisition, and then convert it into a digital model), and then reconstruct a full denture three-dimensional model (including tooth shape, size, arrangement, and contours of gums and alveolar bones) based on the collected data, and reserve a groove for pre-embedded metal mesh on the edentulous jaw base tissue surface of the three-dimensional model to ensure that the metal mesh can be embedded in the denture, and then output the model (output the verified three-dimensional model to a 3D printer or CAM system) using methyl methacrylate resin material to form a denture blank after cutting; S2. Place a matching metal mesh in the groove of the denture blank, and then use the powder and liquid in the self-curing dental tray powder to prepare a mixture in a weight ratio of 2:1 to fill the metal mesh with glue, let it stand for 30 minutes, and then put it into 70°C water for curing for 10 minutes to achieve the embedding of the metal mesh to form a sandwich structure of resin layer, metal mesh, and resin layer, wherein the metal mesh is a titanium alloy metal mesh; S3, cutting the denture blank embedded with the metal mesh again to obtain a full denture, wherein the base resin of the full denture has the metal mesh embedded in the middle.

[0032] Example 4 A complete denture processing technology is carried out according to the method in Example 1, except that the surface of the groove reserved in step S1 is reserved with a plurality of protrusions matching the metal mesh holes to achieve the clamping and limiting of the metal mesh and the tissue surface of the edentulous jaw base.

[0033] Example 5 A full denture processing process is carried out according to the method in Example 1, except that in step S2, the powder and liquid in the self-curing denture base powder are modulated in a weight ratio of 2:1 to obtain a mixture, and then 25g of the modulated self-curing denture base powder mixture, 4g of polyetheretherketone peek, 5g of carbon fiber, and 3g of MBS resin are mixed to obtain a denture base resin mixture, and then the obtained denture base resin mixture is used to fill and embed the metal mesh.

[0034] Example 6 A full denture processing process is carried out according to the method in Example 1, except that in step S2, the powder and liquid in the self-curing denture base powder are modulated in a weight ratio of 2:1 to obtain a mixture, and then 20g of the modulated self-curing denture base powder mixture, 3g of polyetheretherketone, 3g of carbon fiber, and 2g of MBS resin are mixed to obtain a denture base resin mixture, and then the obtained denture base resin mixture is used to fill and embed the metal mesh.

[0035] Example 7 A full denture processing process is carried out according to the method in Example 1, except that in step S2, the powder and liquid in the self-curing denture base powder are modulated in a weight ratio of 2:1 to obtain a mixture, and then 35g of the modulated self-curing denture base powder mixture, 5g of polyetheretherketone, 8g of carbon fiber, and 5g of MBS resin are mixed to obtain a denture base resin mixture, and then the obtained denture base resin mixture is used to fill and embed the metal mesh.

[0036] Example 8 A complete denture processing process is performed according to the method in Example 5, except that in step S2, the carbon fiber in the denture base resin mixture is modified by loading a carbon nanotube-maleic anhydride-hydroxyethyl acrylate composite filler to obtain a modified carbon fiber and then added. The specific operation is: 1) The carbon nanotubes were first acidified and soaked in a nitric acid solution with a molar concentration of 1.0 mol / L for 8 minutes, the carbon nanotubes were immersed in the nitric acid solution, and then washed with water and dried; 2) Mix maleic anhydride, initiator benzoyl peroxide and solvent dimethylformamide, then add the carbon nanotubes pretreated in step 1), heat to 70° C. and react for 1.5 hours, then add hydroxyethyl acrylate, continue to react for 1.5 hours, let stand and precipitate, then filter, dry and wash to obtain a composite filler; The mass ratio of maleic anhydride to carbon nanotubes is 1:4, the amount of initiator added is 2wt% of the amount of maleic anhydride added, the amount of solvent added is 4 times the mass of the amount of maleic anhydride added, and the mass ratio of hydroxyethyl acrylate to maleic anhydride is 1:1; 3) Mixing the powder and liquid in the zinc polycarboxylate cement and uniformly coating them on the surface of the carbon fiber, then evenly spreading the composite filler prepared in step 2) on the surface of the carbon fiber coated with the zinc polycarboxylate cement, and then drying and curing to obtain the modified carbon fiber; Wherein, in step 3), the amount of zinc polycarboxylate cement added is 8wt% of the amount of carbon fiber added, and the mass ratio of composite filler to carbon fiber added is 1:2.5.

[0037] Example 9 A complete denture processing process is performed according to the method in Example 5, except that in step S2, the carbon fiber in the denture base resin mixture is modified by loading a carbon nanotube-maleic anhydride-hydroxyethyl acrylate composite filler to obtain a modified carbon fiber and then added. The specific operation is: 1) First, the carbon nanotubes were acidified and soaked in a nitric acid solution with a molar concentration of 1.0 mol / L for 5 minutes, the nitric acid solution was immersed in the carbon nanotubes, and then washed with water and dried; 2) Mix maleic anhydride, initiator benzoyl peroxide and solvent dimethylformamide, then add the carbon nanotubes pretreated in step 1), heat to 65° C. and react for 2 hours, then add hydroxyethyl acrylate, continue to react for 1 hour, let stand and precipitate, then filter, dry and wash to obtain a composite filler; The mass ratio of maleic anhydride to carbon nanotubes is 1:3, the amount of initiator added is 1wt% of the amount of maleic anhydride added, the amount of solvent added is 3 times the mass of the amount of maleic anhydride added, and the mass ratio of hydroxyethyl acrylate to maleic anhydride is 1:0.8; 3) Mixing the powder and liquid in the zinc polycarboxylate cement and uniformly coating them on the surface of the carbon fiber, then evenly spreading the composite filler prepared in step 2) on the surface of the carbon fiber coated with the zinc polycarboxylate cement, and then drying and curing to obtain the modified carbon fiber; Wherein, in step 3), the amount of zinc polycarboxylate cement added is 5wt% of the amount of carbon fiber added, and the mass ratio of the composite filler to the carbon fiber added is 1:2.

[0038] Example 10 A complete denture processing process is performed according to the method in Example 5, except that in step S2, the carbon fiber in the denture base resin mixture is modified by loading a carbon nanotube-maleic anhydride-hydroxyethyl acrylate composite filler to obtain a modified carbon fiber and then added. The specific operation is: 1) First, the carbon nanotubes were acidified and soaked in a nitric acid solution with a molar concentration of 1.0 mol / L for 10 minutes, the nitric acid solution was immersed in the carbon nanotubes, and then washed with water and dried; 2) Mix maleic anhydride, initiator benzoyl peroxide and solvent dimethylformamide, then add the carbon nanotubes pretreated in step 1), heat to 80° C. and react for 1 hour, then add hydroxyethyl acrylate, continue to react for 2 hours, let stand and precipitate, then filter, dry and wash to obtain a composite filler; The mass ratio of maleic anhydride to carbon nanotubes is 1:5, the amount of initiator added is 3wt% of the amount of maleic anhydride added, the amount of solvent added is 5 times the mass of the amount of maleic anhydride added, and the mass ratio of hydroxyethyl acrylate to maleic anhydride is 1:1.2; 3) Mixing the powder and liquid in the zinc polycarboxylate cement and uniformly coating them on the surface of the carbon fiber, then evenly spreading the composite filler prepared in step 2) on the surface of the carbon fiber coated with the zinc polycarboxylate cement, and then drying and curing to obtain the modified carbon fiber; Wherein, in step 3), the amount of zinc polycarboxylate cement added is 10wt% of the amount of carbon fiber added, and the mass ratio of the composite filler to the carbon fiber added is 1:3.

[0039] Embodiment 11 A processing technology for a complete denture is carried out according to the method in Example 5, except that no MBS resin is added to the denture base resin raw material.

[0040] Example 12 A process for processing a complete denture is carried out according to the method in Example 5, except that polyetheretherketone is not added to the denture base resin raw material.

[0041] Embodiment 13 A complete denture processing technology is carried out according to the method in Example 5, except that no carbon fiber is added to the denture base resin raw material.

[0042] Embodiment 14 A complete denture processing technology is carried out according to the method in Example 8, except that hydroxyethyl acrylate monomer is not added in step 2).

[0043] Embodiment 15 A complete denture processing technology is carried out according to the method in Example 8, except that in step 2), the hydroxyethyl acrylate monomer is replaced by methyl acrylate in an equal amount.

[0044] Comparative Example 1 A complete denture processing process is carried out according to the method in Example 1, except that the metal mesh is not embedded in step S2, and the obtained Figure 2 The denture shown in .

[0045] Performance Testing The denture edentulous jaw base tissue surface (i.e., the denture center) prepared in the embodiments and comparative examples of the present application Figure 1 The bending strength of the parts was tested by an electronic universal testing machine, and the test results are shown in Table 1 below.

[0046] Table 1: Referring to the test results in Table 1 above, the strength of the denture prepared in the embodiment of the present application is significantly improved compared with that in Comparative Example 1. Combined with the test results of Example 1 and Example 4, although the denture in Example 1 has a higher bending strength, the metal mesh and the base tissue surface in Example 4 are limited by the protrusions, so that the bending strength of Example 4 is further improved compared with Example 1. Referring to the test results of Examples 5-7, it can be seen that when polyetheretherketone, carbon fiber and MBS are added to the dental tray powder, its strength is further improved. Combined with the test results of Example 11, it can be seen that when MBS resin is not added, its bending strength is significantly reduced compared with Example 5. This is mainly due to the weak dispersion compatibility of Peek and carbon fiber in methyl methacrylate polymer in the dental tray powder. The addition of MBS significantly improves its compatibility and plays a better reinforcing role. Combined with the test results of Example 12 and Example 13, when only polyetheretherketone or carbon fiber is added, the reinforcing effect is limited.

[0047] Referring to the test results of Example 5 and Examples 8-10, it can be seen that when the carbon fiber is loaded with a composite filler, its flexural strength is significantly further improved. On the one hand, this is because the increase in its roughness is more conducive to the adhesion of the filling layer and the fixed fit between the metal mesh and the base tissue surface. On the other hand, the monomer grafting modification further improves the dispersion performance of the carbon fiber in the system and further improves the reinforcement performance. Combined with the test results of Example 14 and Example 15, when no hydroxyethyl acrylate monomer is added during the carbon fiber modification process or an equal amount is replaced by an ordinary acrylate monomer, its strength is significantly reduced compared to Example 8.

[0048] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A complete denture processing technology, characterized in that: The following steps are involved: S1. Reconstruct a three-dimensional model of the full denture according to the oral scan data or the tray data, and reserve a groove for pre-embedded metal mesh on the edentulous jaw base tissue surface of the three-dimensional model. Then, the model output is made of resin material and cut to form a denture blank; S2, placing a matching metal mesh into the groove of the denture blank, and then embedding the metal mesh with glue, and curing it to form a sandwich structure of resin layer, metal mesh, and resin layer; S3, cutting the denture blank embedded with the metal mesh again to obtain a full denture, wherein the base resin of the full denture has the metal mesh embedded in the middle.

2. A complete denture processing process according to claim 1, characterized in that: The specific operation in step S2 is to put a metal mesh into the tree groove of the denture blank and then fill it with denture base resin, and then put it into 45-70°C water for curing for 10-40 minutes after it is left to stand.

3. A complete denture processing process according to claim 1, characterized in that: The metal mesh is selected from one or more of titanium alloy, nickel-chromium alloy, and cobalt-chromium alloy.

4. A complete denture processing process according to claim 1, characterized in that: The surface of the groove reserved in step S1 is reserved with a number of protrusions matching the metal mesh.

5. The complete denture processing technology according to claim 1, characterized in that: The cutting in step S1 and step S3 is both achieved through digital technology.

6. A complete denture processing process according to claim 1, characterized in that: The denture base resin in step S2 is a methyl methacrylate homopolymer.

7. The complete denture processing technology according to claim 1, characterized in that: The denture base resin in step S2 comprises the following raw materials in parts by weight: 3-5 parts of polyetheretherketone, 3-8 parts of carbon fiber, 2-5 parts of MBS resin and 20-35 parts of self-curing dental tray powder, wherein the carbon fiber is modified by loading carbon nanotube-maleic anhydride-hydroxyethyl acrylate composite filler to obtain modified carbon fiber and then added.

8. A complete denture processing process according to claim 7, characterized in that: The modified carbon fiber is prepared by the following method: 1) First, the carbon nanotubes are acidified and soaked in a nitric acid solution, then washed with water and dried; 2) Mix maleic anhydride, initiator and solvent, then add the carbon nanotubes pretreated in step 1), heat to 65-80°C and react for 1-2 hours, then add hydroxyethyl acrylate, continue to react for 1-2 hours, let stand and precipitate, then filter, dry and wash to obtain a composite filler; 3) Evenly coating the zinc polycarboxylate cement on the surface of the carbon fiber, then evenly spreading the composite filler prepared in step 2) on the surface of the carbon fiber coated with the zinc polycarboxylate cement, and then drying and curing to obtain the modified carbon fiber.

9. A complete denture processing process according to claim 8, characterized in that: When preparing modified carbon fibers, the mass ratio of maleic anhydride to carbon nanotubes in step 2) is 1:(3-5), the amount of initiator added is 1-3wt% of the amount of maleic anhydride added, the amount of solvent added is 3-5 times the mass of the amount of maleic anhydride added, and the mass ratio of hydroxyethyl acrylate to maleic anhydride is 1:(0.8-1.2); In step 3), the amount of zinc polycarboxylate cement added is 5-10wt% of the amount of carbon fiber added, and the mass ratio of composite filler to carbon fiber added is 1:(2-3).

10. A complete denture made by the complete denture processing process as claimed in any one of claims 1 to 9.

Images