CN109561952B - Denture, denture manufacturing method and device - Google Patents
Denture, denture manufacturing method and device Download PDFInfo
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- CN109561952B CN109561952B CN201780000102.5A CN201780000102A CN109561952B CN 109561952 B CN109561952 B CN 109561952B CN 201780000102 A CN201780000102 A CN 201780000102A CN 109561952 B CN109561952 B CN 109561952B
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- A61C13/00—Dental prostheses; Making same
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Abstract
The invention provides a denture, a denture manufacturing method and a denture manufacturing device, wherein the denture comprises: a functional wearing layer (1) positioned on the surface layer; and a stress relaxation layer (2) having a porous structure and located below the functional wear layer (1). The artificial tooth can be adjusted in a self-adaptive mode in the using process, and jaw tooth trauma, tooth occlusion trauma and temporomandibular joint disorder are avoided.
Description
Technical Field
The invention relates to the field of oral medicine, in particular to a false tooth, a false tooth manufacturing method and a false tooth manufacturing device.
Background
When people chew, the upper and lower teeth form a pair of special wearing pairs, namely tooth wearing pairs. Under the control of central nerve, taking mastication muscle as power and occlusal process as procedures, the mastication cycle is repeated (900 times per meal on average) to complete complex mastication function. The contact mode of the upper jaw teeth and the lower jaw teeth is mainly friction and collision, the corresponding wear types are abrasive wear and fatigue wear, and the two wear modes are alternately generated and mutually coupled and enhanced. The amount of wear of the enamel in the oral cavity was measured using a three-dimensional imaging technique and found that the enamel was worn at a rate of 20-48 μm/year on average. From the beginning of the occlusal occlusion (about 12 years old), the upper and lower teeth are continuously and synchronously worn, the occlusal surface gradually forms static, dynamic, uniform and wide three-dimensional curved surface contact, and finally, the proper individual occlusal balance is obtained (the chewing efficiency reaches the best individual and is beneficial to protecting the oral and jaw systems), and the process is called physiological abrasion.
After the loss of the natural human tooth, the artificial tooth needs to be repaired by false teeth. The common false teeth are divided into two types of fixed false teeth and movable false teeth, the curative effect of the fixed false teeth (including the implanted fixed false teeth) is definite, the fixed false teeth are favored by both doctors and patients, the fixed false teeth account for 50-80% of the total quantity of the false teeth, and the annual demand of China is conservatively estimated to be more than 2000 ten thousand. For the self and the opposite jaw teeth, the hardness of the false tooth determines the fatigue wear performance, the wear resistance of the false tooth determines the abrasive wear performance, and the customization and the regulation of the hardness and the wear resistance are the key for realizing the physiological wear performance of the false tooth. An ideal denture should have similar wear characteristics to natural tooth enamel, and can wear the natural tooth enamel of the jaw simultaneously and equivalently. Hitherto, the known denture fixing forming technologies such as lost wax casting, material reduction cutting, solid additive manufacturing and the like cannot realize quantitative regulation and personalized customization of denture hardness and wear resistance, namely, the personalized bionic performance of the 'wear performance' of the denture fixing is not realized.
The raw materials of the fixing denture mainly comprise metal, resin and ceramic. In the metal materials, the gold alloy and the titanium alloy have moderate hardness, are abrasion-resistant and cause relatively small abrasion to natural teeth, but the gold color and the silver color of the metal materials are difficult to accept by a normal person. The multilayer false tooth manufacturing technology including porcelain technology obviously improves the defect of aesthetic effect of pure metal materials, but the outer porcelain surface layers of silicate, feldspar, lithium disilicate and the like are easy to break during long-term repeated chewing or are stripped at the combined interface with metal or zirconium oxide, so that the repair failure (the false tooth is implanted and fixed obviously) is caused; in the resin material, the composite resin with the inorganic filler mass fraction of 80-87.5% has hardness and wear resistance similar to natural tooth enamel, but the composite resin has obviously insufficient flexural strength, and even if a metal substrate is used for supporting, resin layers are stripped and broken; compared with metal and resin materials, the ceramic material generally has the advantages of more vivid color, higher density (hard to adhere to bacterial plaque), better biocompatibility and the like, and has unique semitransparent color effect, so that the ceramic material is incomparable in aesthetic angle. The early dental ceramic has large brittleness and insufficient strength, the strength of the zirconium dioxide toughened by the martensite phase change effect is greatly improved, and the problems of low strength and easy fracture of the traditional silicate and feldspar ceramic false tooth are solved. In recent years, phase change toughened zirconium dioxide full ceramic dentures (full zirconium dentures) are replacing traditional ceramic, metallic dentures (including porcelain/molded-on-metal dentures) to a large extent.
However, the intermediate and long-term clinical observation shows that the problem of non-physiological excessive abrasion of the natural teeth of the jaw is very serious due to the high hardness and wear resistance of the zirconia with a compact and homogeneous structure. Excessive abrasion can cause serious diseases such as jaw tooth trauma, occlusal trauma and temporomandibular joint disorder, and affect the long-term use effect.
Disclosure of Invention
One object of the present invention is to propose a denture that can be adjusted adaptively during use.
According to one aspect of the present invention, there is provided a dental prosthesis, the occlusal surface of which comprises a functional wear layer on a surface layer; and a stress relaxation layer of a porous structure located below the functional wear layer.
Optionally, the stress relaxation layer is made of ceramic, metal or high-strength polymer material with a porous structure.
Optionally, the functional wearing layer is made of composite resin, composite polyether-ether-ketone, glass ceramic, gold alloy, titanium alloy or soft cobalt-chromium alloy.
Optionally, the stress relaxation layer has a thickness, hardness and/or abrasion resistance comparable to that of natural dentin.
Optionally, the thickness, hardness and/or abrasion resistance of the functional wearing layer is comparable to that of the enamel layer of natural teeth.
Optionally, the porous structure of the stress relaxation layer is filled with a flowable resin, a low melting point and low hardness alloy, and/or a glass ceramic material.
Optionally, the stress relaxation layer is a trabecular bone-like, dendritic and/or three-dimensional gradient structure with stress interruption function, which is three-dimensionally penetrated among the holes.
Optionally, the method further comprises: the base supporting layer is arranged on the bottom layer of the false tooth and is made of zirconia, gold alloy, titanium alloy, cobalt-chromium alloy or composite polyether-ether-ketone.
Optionally, the density of the part of the stress relaxation layer, which is connected with the base support layer, is gradually increased along the direction towards the base support layer, and the base support layer is of a solid compact structure.
Optionally, the non-occlusal region of the denture is made of dense ceramic, high-strength molecular material or metal material.
Optionally, the denture further comprises: the gum layer is positioned below the side surface of the false tooth, and the color of the gum layer is equivalent to the color of the gum of the patient.
Optionally, the denture comprises a plurality of colors, the color of the denture being comparable to the color of the patient's natural teeth.
Optionally, the denture is of an integrally formed structure made of metal, composite polyether-ether-ketone or elastic ceramic materials.
The stress relieving layer with the porous structure is arranged below the occlusal surface function wearing layer of the false tooth, and the function wearing layer can be broken and compressed along with the chewing process of a patient, so that the shape of the false tooth is more in line with the chewing requirement of the patient along with the use of the patient, the wounds to the jaw teeth, the occlusal wounds, the temporomandibular joint disorder and the like caused by the fact that the false tooth is too hard in the long-term use process are avoided, and the long-term use effect is optimized.
According to another aspect of the present invention, there is provided a denture manufacturing method, comprising: printing a base supporting layer at the bottom of the false tooth by using a three-dimensional printing device according to the false tooth three-dimensional data; printing a stress relaxation layer with a porous structure above the substrate supporting layer according to the denture three-dimensional data; a functional wear layer is formed on the surface of the occlusal surface of the denture above the stress relaxation layer.
Optionally, the method further comprises: after the stress relaxation layer is printed, performing a heat treatment operation; injecting resin, low-melting-point low-hardness alloy and/or glass ceramic into the stress relaxation layer of the porous structure; the method for forming a functional wear layer on the occlusal surface of a denture over a stress relaxation layer comprises: a functional wear layer is formed on a stress relaxation layer made of a resin, a low-melting-point low-hardness alloy, and/or a glass ceramic.
Optionally, the method further comprises: after the heat treatment operation is completed, treating the stress relaxation layer with a surface tension treating agent to improve the surface wettability of the stress relaxation layer; the injection of resin, low melting point and low hardness alloy and/or glass ceramic into the stress relaxation layer of the porous structure comprises: resin, low-melting-point low-hardness alloy and/or glass ceramic are injected into the stress relaxation layer treated with the surface tension treating agent.
Optionally, creating a functional wear layer over the stress relaxation layer on the occlusal surface of the denture comprises: and printing a functional wearing layer on the stress relieving layer according to the three-dimensional data of the false tooth.
Optionally, creating a functional wear layer over the stress relaxation layer on the occlusal surface of the denture comprises: covering the material of the functional wearing layer above the stress relieving layer; and cutting the material of the functional wearing layer according to the three-dimensional data of the false tooth to generate the functional wearing layer.
Optionally, the substrate supporting layer is made of zirconia, gold alloy, titanium alloy, cobalt-chromium alloy or composite polyetheretherketone.
Optionally, the stress relaxation layer is made of porous ceramic, metal or high-strength polymer material
Optionally, the functional wearing layer is made of composite resin, composite polyether-ether-ketone, glass ceramic, gold alloy, titanium alloy or soft cobalt-chromium alloy.
By the method, the false tooth comprising the stress relaxation layer with the porous structure can be manufactured, so that the chewing requirements of a patient are met in the using process of the false tooth, the injury to the jaw teeth, the injury to the occlusal joint, the temporomandibular joint disorder and the like caused by the fact that the false tooth is too hard in the long-term using process are avoided, and the long-term using effect is optimized.
According to yet another aspect of the present invention, there is provided a denture fabrication system comprising: the three-dimensional printer is used for printing the substrate supporting layer at the bottom of the denture according to the denture three-dimensional data; printing a stress relaxation layer with a porous structure above the substrate supporting layer according to the denture three-dimensional data; and a functional wear layer generation device for generating a functional wear layer on the occlusal surface of the denture above the stress relaxation layer.
Optionally, the method further comprises: the heat treatment equipment is used for carrying out heat treatment operation after the three-dimensional printer finishes printing the stress relaxation layer; an injection device for injecting resin, low-melting-point low-hardness alloy and/or glass ceramic into the stress relaxation layer of the porous structure; the functional wearing layer producing apparatus is used to produce a functional wearing layer above a stress relaxation layer comprising a resin, a low-melting-point low-hardness alloy, and/or a glass ceramic.
Optionally, the method further comprises: a surface tension treatment device for treating the stress relaxation layer with a surface tension treatment agent to improve surface wettability of the stress relaxation layer after the heat treatment device completes the heat treatment operation; the injection device is used for injecting resin, low-melting-point low-hardness alloy and/or glass ceramic into the stress relaxation layer treated by the surface tension treating agent after the surface tension treating device finishes the surface tension treatment.
Optionally, the functional wear layer generating device is a three-dimensional printer for printing the functional wear layer from the denture three-dimensional data above the stress relaxation layer.
Optionally, the functional wear apparatus comprises: material covering means for covering the material of the functional wear layer above the stress relaxation layer; and the numerical control cutting equipment is used for cutting the material of the functional wearing layer according to the three-dimensional data of the false tooth to generate the functional wearing layer.
The denture manufacturing system can manufacture the dentures comprising the stress relaxation layers with porous structures, so that the dentures can better meet the chewing requirements of patients in the use process of the dentures, and meanwhile, the dentures can be prevented from causing injury to teeth of jaws, occlusal injury, temporomandibular joint disorder and the like in the long-term use process due to the fact that the dentures are too hard, and the long-term use effect is optimized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a cross-sectional view of one embodiment of a denture of the present invention.
Fig. 2 is a cross-sectional view of a prior art denture.
Fig. 3 is a schematic view showing one example of a porous structure of a stress relaxation layer of the denture according to the present invention.
Fig. 4 is a cross-sectional view of another embodiment of a denture of the present invention.
Fig. 5 is a flow chart of one embodiment of a denture making method of the present invention.
Fig. 6 is a flow chart of another embodiment of a denture making method of the present invention.
Fig. 7 is a schematic view of one embodiment of a denture creation device of the present invention.
Fig. 8 is a schematic view of another embodiment of a denture creation device of the present invention.
Fig. 9 is a schematic view of yet another embodiment of a denture creation device of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
A cross-sectional view of one embodiment of a denture of the present invention is shown in fig. 1. Wherein, the functional wearing layer 1 is positioned on the surface layer of the occlusal surface of the false tooth and has a compact structure; the stress relaxation layer 2 is located below the functional wear layer, and has a porous structure in a region indicated by oblique lines. During the chewing process of the patient, the part of the functional wearing layer 1 stressed by the force exceeding the preset threshold value can be deformed, the supporting part of the porous structure in the stress relieving layer can be broken, and the space of the stress relieving layer 2 is compressed.
Modern denture design and manufacturing technologies dates back to the beginning of the last century, and dr.william introduced manual wax-lost casting technology into the fabrication of metal dentures and continued to use today. In the last 70 s, dr, duret introduced numerical control material reduction Manufacturing technology into denture processing, which led to the first digital revolution in the field of global denture processing, CAD (Computer Aided Design)/CAM (Computer Aided Manufacturing) profiling dentures, marking that oral medicine entered into the digital era. CAD/CAM initially sintered soft zirconia permanent dentures (final sintered form) are the most typical and successful combination of highly efficient digital design and manufacturing techniques with high performance ceramic materials. The requirements of bionic appearance, bionic color and anti-fracture strength of the fixed false tooth are met, and the short-term repairing effect is excellent.
A prior art denture is shown in cross-section in fig. 2. The upper structure 5 of the denture is a solid structure, the abutment 6 is embedded in the upper structure 5, and the lower part of the denture can be connected with the implant. Since the upper structure 5 has a high hardness and a solid structure, and lacks a space for deformation, when a patient bites strongly, the teeth of the jaw are easily damaged.
The stress relieving layer with the porous structure is arranged below the occlusal surface function wearing layer of the denture in the embodiment of the invention, so that the self-adaptive adjustment of the surface hardness of the denture can be realized, the function wearing layer deforms along with the fracture and compression of a chewing process of a patient, the shape of the denture is more in line with the chewing requirement of the patient along with the use of the patient, simultaneously, the injury to jaw teeth, the occlusion injury, the temporomandibular joint disorder and the like caused by the over-hard denture in the long-term use process are avoided, and the long-term use effect is optimized.
Fig. 3 is a schematic view showing an example of the porous structure of the stress relaxation layer of the denture according to the present invention. In one embodiment, the porous structure of the stress relaxation layer may be trabecular, dendritic, other structures capable of achieving stress interruption, or a mixture of structures. The structure has certain stress capacity, and can ensure that the structure is not deformed in the normal chewing process; simultaneously, compare more easy rupture with solid construction, can break at the patient in-process of energetically occluding, the denture occlusal surface takes place to deform, can realize self-adaptation regulation on the one hand, makes the denture more accord with user's demand, and on the other hand also can prevent to damage to the jaw tooth, improves user experience.
In one embodiment, the thickness, hardness and abrasion resistance of the stress relaxation layer are comparable to the thickness, hardness and abrasion resistance of natural dentin, respectively; the thickness, hardness and abrasion resistance of the functional abrasion layer are respectively equivalent to those of the enamel layer of the natural tooth. In one embodiment, the functional wearing layer can be made of composite resin, composite polyether ether ketone, glass ceramic, gold alloy, titanium alloy or soft cobalt-chromium alloy material with the hardness and wear resistance equivalent to those of the natural tooth enamel layer; the porous structure of the stress relaxation layer can be made of ceramics, high-strength polymers (such as composite polyether ether ketone) or metal materials with the hardness and the wear resistance equivalent to those of natural tooth dentin.
The artificial tooth ensures synchronous abrasion with natural teeth of a jaw, improves the bionic truth of the artificial tooth, can be adaptively adjusted in the using process of a patient, and improves the service life of the artificial tooth and the user experience of the patient.
In one embodiment, the porous structure of the stress relaxation layer may be filled with a filler, which may be one or more of a high flow resin, a low melting point low hardness alloy, a glass ceramic material (e.g., lanthanum glass), and when chewed by a patient, the different levels of biting force drive the scaffold of the porous structure at different depths to fracture until an equivalent counteracting biting force is generated. The bracket after being stressed and broken becomes inorganic wear-resistant seasoning of fillers such as resin and the like, and the personalized adjustment of the wear resistance is realized through the quantitative setting of the size and the distribution density of the broken micro-units of the bracket.
In one embodiment, as shown in fig. 1, the denture may further comprise a base supporting layer 3 made of zirconia, gold alloy, titanium alloy, cobalt-chromium alloy or composite polyetheretherketone. The base support layer 3 is connected to the stress relaxation layer 2, and both may be integrally formed.
The artificial tooth is provided with the bracket connected with the stress relaxation layer, can bear the whole artificial tooth, is convenient to be connected with the implant and is convenient for the artificial tooth to be implanted; the integrally formed structure can ensure the firmness of the false tooth and prevent the dislocation of the stress relaxation layer and the base supporting layer.
In one embodiment, the density of the portion of the stress relaxation layer 2 connected with the base support layer 3 is changed in a gradient manner, the density is gradually increased along the direction towards the base support layer 3, and the base support layer 3 is a solid compact structure. The internal structure can play a role in buffering, prevent the damage to the tooth root, the implant and the peripheral alveolar bone of a patient in the process of vigorous occlusion, prolong the service life of the denture and protect the health of soft and hard tissues of the oral cavity.
In one embodiment, the functional wear layer 1 has a porous structure, or a part of the porous structure is inserted into the dense structure of the functional wear layer 1, so that the fracture resistance of the functional wear layer is improved, and the service life of the denture is prolonged. Wherein the specific structure of the porous structure and the filler may be any of those mentioned above.
In one embodiment, as shown in fig. 1, the denture further comprises a non-occlusal region 4 made of dense ceramic, high-strength molecular material or metal material, wherein the non-occlusal region with a high-strength dense structure can resist the fracture energy borne by the denture in the long-term service process, so as to ensure that the side surface of the denture is not deformed and prolong the service life of the denture. In one embodiment, the non-occlusal region 4 and the base supporting layer 3 may be an integrated structure and integrally made of the same material, thereby reducing the complexity of manufacturing the product, preventing the non-occlusal region and the base supporting layer from being dislocated, and further improving the firmness of the denture.
The human teeth are continuously inclined and moved towards the outside of the mouth in the life process. When teeth move physiologically, the occlusion contact area of the denture changes, and the new porous support and resin composite structure in the occlusion contact area can repeat the protective fracture process of the porous support, so that the aims of fixing the denture hardness, the wear resistance and the dynamic self-adaptive matching of an individual to the natural teeth of the jaw and synchronously and physiologically wearing the surface of the denture and the enamel of the natural teeth of the jaw are fulfilled.
Another embodiment of a denture of the present invention is shown in cross-section in fig. 4. The false tooth can be made of metal, composite polyether-ether-ketone or elastic ceramic materials and is integrally formed. The surface of the occlusal surface of the false tooth is a functional wearing layer, the middle layer is a stress relaxation layer with a porous structure, and the lower layer is a substrate supporting layer. The false tooth can be manufactured in an integrated mode, manufacturing efficiency is improved, and manufacturing cost is reduced.
In one embodiment, in order to improve the aesthetic appearance of the denture, the color of the denture may be configured with reference to the shape of the natural teeth of the human body. Because the colors of different positions of the natural teeth are different, different colors can be prepared for different positions of the false tooth in a layered mode, and the colors are as close to the colors of the natural teeth as possible. In one embodiment, since some patients may have partial missing gums, the denture may further include a gum layer that fills the missing gum portion of the patient, and has a color comparable to the patient's own gum color.
The color of the false tooth is rich and gradually changed, and is the same as that of a natural tooth, so that the natural tooth and the false tooth are not easily distinguished by other people, the attractiveness is improved, and the user experience is improved; and the gum layer can fill up the gum part that the patient lacked, has further improved pleasing to the eye degree, improves user experience, also is convenient for popularize and apply more.
A flow chart of one embodiment of a denture making method of the present invention is shown in fig. 5.
In step 501, a three-dimensional printing device is used to print a base support layer on the bottom of a denture according to the three-dimensional data of the denture. In one embodiment, the base support layer may be a zirconia, gold alloy, titanium alloy, cobalt chromium alloy, or composite polyetheretherketone material.
In step 502, a stress relaxation layer of porous structure is printed over a base support layer according to denture three-dimensional data. In one embodiment, the stress relaxation layer may be a porous ceramic, metal, or high strength polymer (e.g., polyetheretherketone composite).
In step 503, a functional wear layer is created over the stress relaxation layer on the occlusal surface of the denture. In one embodiment, the functional wear layer may be a composite resin, a composite polyetheretherketone, a glass ceramic, a gold or titanium alloy material, or a soft cobalt-chromium alloy material.
By the method, the false tooth with the stress relieving layer with the porous structure below the occlusal surface function wearing layer can be manufactured, so that the chewing requirement of a patient can be met in the using process of the false tooth, the injury to the jaw teeth, the occlusal injury, the temporomandibular joint disorder and the like caused by the fact that the false tooth is too hard in the long-term using process can be avoided, and the long-term using effect is optimized.
In one embodiment, the metal, the composite polyether-ether-ketone or the elastic ceramic material can be used for printing in an integrated mode, the whole denture can be printed according to the denture three-dimensional data, the manufacturing efficiency is improved, and the manufacturing cost is reduced.
A flow chart of another embodiment of a denture making method of the present invention is shown in fig. 6.
In step 601, a base support layer at the bottom of the denture is printed by a three-dimensional printing device according to the three-dimensional data of the denture.
In step 602, a stress relaxation layer of a porous structure is printed over a base support layer according to denture three-dimensional data.
In step 603, a heat treatment process is performed to fix the shapes of the substrate support layer and the stress relaxation layer and to stabilize the connection.
In step 604, one or more of a high flow resin, a low melting point low hardness alloy, a glass ceramic material is injected or filled into the porous structure of the stress relaxation layer. In one embodiment, the injected substance can be compacted above, ensuring a compact filling. In one embodiment, in order to inject the filler into the porous structure as much as possible, the porous structure support of the stress relaxation layer may be treated with a surface tension treating agent to improve the surface wettability of the stress relaxation layer.
In step 605, a functional wear layer on the occlusal surface of the denture is formed over the stress relaxation layer. In one embodiment, the three-dimensional printing may be performed by aligning the three-dimensional coordinates of the denture with the three-dimensional coordinates of the stress relaxation layer printed before, and then printing the functional wear layer on top. In another embodiment, the material of the functional wear layer may be covered on the stress relaxation layer, and then the material of the functional wear layer may be cut by a numerical control machine or by hand cutting according to the three-dimensional data of the denture to form the functional wear layer, thereby reducing the requirement for the material that can be printed by the three-dimensional printer.
By the method, the filler can be injected into the porous structure of the stress relaxation layer after the heat treatment operation, so that the filler is prevented from being damaged in the heat treatment process, and meanwhile, a certain shape and position can be kept under the support of the filler after the support part is broken, and excessive deformation is avoided.
A schematic view of one embodiment of a denture creation device of the present invention is shown in fig. 7. The three-dimensional printer 701 can print a base supporting layer at the bottom of the denture according to the denture three-dimensional data; and printing a stress relaxation layer with a porous structure above the substrate supporting layer according to the three-dimensional data of the denture. In one embodiment, the base support layer may be a zirconia, gold alloy, titanium alloy, cobalt chromium alloy, or composite polyetheretherketone material; in one embodiment, the stress relaxation layer may be a ceramic or metal material with a porous structure. The functional wear layer generation apparatus 702 is capable of generating a functional wear layer on the occlusal surface of the denture over the stress relaxation layer. In one embodiment, the functional wear layer may be a composite resin, a composite polyetheretherketone, a gold or titanium alloy material, or a soft cobalt-chromium alloy material.
The system can manufacture the false tooth with the occlusal surface comprising the stress relaxation layer with the porous structure, so that the chewing requirement of a patient is better met in the using process of the false tooth, the injury to the jaw teeth, the occlusal injury, the temporomandibular joint disorder and the like caused by the over-hard false tooth in the long-term using process are avoided, and the long-term using effect is optimized.
In one embodiment, the functional wear layer generation device 702 may be a three-dimensional printer, and the three-dimensional printer may continuously print the substrate support layer, the stress relaxation layer, and the functional wear layer by using a material such as metal, composite polyetheretherketone, or elastic ceramic, so as to improve the connection stability between the layers, improve the manufacturing efficiency, and reduce the manufacturing cost.
A schematic view of another embodiment of a denture creation device of the present invention is shown in fig. 8. Here, the structure and function of the three-dimensional printer 801 and the functional wear layer generation apparatus 802 are similar to those in the embodiment of fig. 7. The denture creation apparatus also includes a heat treatment device 803 and an injection device 804. The heat treatment device 803 can perform a heat treatment operation after the three-dimensional printer 801 prints the stress relaxation layer, so that the forms of the base support layer and the stress relaxation layer are fixed and the connection is more stable. The injection device 804 can inject or fill one or more of a high-fluidity resin, a low-melting-point low-hardness alloy, a glass-ceramic material into the porous structure of the stress relaxation layer.
The device can inject the filler into the porous structure of the stress relaxation layer after the heat treatment operation, so that the filler is prevented from being damaged in the heat treatment process, meanwhile, the support can be ensured to keep a certain shape and position under the support of the filler after the support is broken, the support after being stressed and broken becomes inorganic wear-resistant seasoning of the fillers such as resin, the personalized adjustment of the wear resistance is realized through the quantitative setting of the size and the distribution density of the broken micro-units of the support, and the excessive deformation is avoided.
A schematic view of yet another embodiment of a denture creation device of the present invention is shown in fig. 9. Among them, the three-dimensional printer 901, the functional wearing layer producing apparatus 902, the heat treatment apparatus 903, and the injection apparatus 904 are similar in structure and function to those in the embodiment of fig. 8. The denture creating apparatus further comprises a surface tension treatment device 905 capable of treating the porous structure support of the stress relaxation layer with a surface tension treating agent to improve the surface wettability of the stress relaxation layer.
The false tooth manufacturing device can conveniently inject fillers into the stress relaxation layer by injection equipment, and ensures compact filling, so that a certain shape and position can be kept under the support of the fillers after the support part is broken, and the excessive deformation of the occlusal surface of the false tooth is avoided.
In one embodiment, the functional wear layer generating device may be a three-dimensional printer that prints the three-dimensional coordinates of the stress relaxation layer before aligning the three-dimensional coordinates of the prosthetic appliance after the injection operation is completed, thereby printing the functional wear layer above.
In another embodiment, the functional wear layer generation apparatus may include a material covering device and a numerically controlled cutting apparatus, wherein the material covering device is capable of covering the material of the functional wear layer above the stress relaxation layer; the numerical control cutting equipment can cut the material of the functional wearing layer according to the three-dimensional data of the false tooth to generate the functional wearing layer, so that the requirement on the material which can be printed by the three-dimensional printer is reduced. The numerical control cutting equipment can be a numerical control machine tool and the like.
Occlusions (occlusions) also refer to the static contact relationship between upper and lower dentition; occlusion refers to the dynamic contact between the upper and lower dentitions.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (20)
1. A denture, wherein an occlusal surface of the denture comprises:
the functional wearing layer is positioned on the surface layer and is configured to deform when the part of the surface layer is stressed to exceed a preset threshold value;
and a stress relaxation layer of a porous structure positioned below the functional wearing layer, configured to be broken by a supporting portion of the porous structure according to a chewing process of a patient, and a space of the stress relaxation layer is compressed.
2. The denture according to claim 1,
the stress relaxation layer is made of ceramic, metal or high-strength polymer materials with porous structures;
and/or the presence of a gas in the gas,
the functional wearing layer is made of composite resin, composite polyether-ether-ketone, glass ceramic, gold alloy, titanium alloy or soft cobalt-chromium alloy.
3. The denture according to claim 1,
the thickness, hardness and/or wear resistance of the stress relaxation layer are equivalent to those of natural dentin;
and/or the presence of a gas in the gas,
the thickness, hardness and/or abrasion resistance of the functional wearing layer is equivalent to that of the enamel layer of the natural teeth of the patient.
4. The denture according to claim 1, wherein the porous structure of the stress relaxation layer is filled with a flowable resin, a low melting point and low hardness alloy and/or a glass ceramic material.
5. The denture according to claim 1 or 4, wherein the stress relaxation layer is a trabecular, dendritic and/or three-dimensional gradient structure with a stress interruption function, which is three-dimensionally penetrated between the holes.
6. The denture according to claim 1,
further comprising: the base supporting layer is arranged on the bottom layer of the false tooth and is made of zirconia, gold alloy, titanium alloy, cobalt-chromium alloy or composite polyether-ether-ketone.
7. The denture of claim 6,
the density of the part of the stress relaxation layer, which is connected with the base supporting layer, is gradually increased along the direction towards the base supporting layer, and the base supporting layer is of a solid compact structure.
8. The denture of claim 1, wherein the non-occlusal region of the denture is a dense ceramic, high strength molecular material or metallic material.
9. The denture of claim 1 or 6, further comprising: a gum layer located below the side of the denture, the gum layer having a color comparable to the patient's gum color.
10. The denture of any one of claims 1-4, 6-8, wherein the denture comprises a plurality of colors, and the color of the denture is comparable to the color of a patient's natural teeth.
11. The denture of claim 6, wherein the denture is of a one-piece structure of metal, composite polyetheretherketone or elastic ceramic.
12. A method of manufacturing a denture, comprising:
printing a base supporting layer at the bottom of the false tooth by using a three-dimensional printing device according to the false tooth three-dimensional data;
printing a stress relaxation layer of a porous structure above the substrate supporting layer according to denture three-dimensional data, wherein the stress relaxation layer has a fracture phenomenon on the supporting part of the porous structure along with the chewing process of a patient, and the space of the stress relaxation layer is compressed;
and generating a functional wear layer on the surface of the occlusal surface of the denture above the stress relaxation layer, wherein the functional wear layer is configured to deform at a part which is stressed to exceed a predetermined threshold value.
13. The method of claim 12, further comprising:
after the stress relaxation layer is printed, performing heat treatment operation;
injecting resin, low-melting-point low-hardness alloy and/or glass ceramic into the stress relaxation layer of the porous structure;
the step of forming a functional wear layer on the occlusal surface of the denture above the stress relaxation layer comprises:
the functional wear layer is generated above the stress relaxation layer including the resin, the low-melting-point low-hardness alloy, and/or the glass ceramic.
14. The method of claim 13, further comprising:
after the heat treatment operation is completed, treating the stress relaxation layer with a surface tension treating agent to improve the surface wettability of the stress relaxation layer;
the injecting of the resin, the low-melting-point low-hardness alloy, and/or the glass ceramic into the stress relaxation layer of the porous structure includes:
and injecting resin, alloy with low melting point and low hardness and/or glass ceramic into the stress relaxation layer treated by the surface tension treating agent.
15. The method of claim 12, 13 or 14, wherein said creating a functional wear layer on the occlusal surface of the denture over said stress-relieving layer comprises:
printing the functional wearing layer above the stress relieving layer according to the three-dimensional data of the false tooth;
or the like, or, alternatively,
a material covering the functional wear layer over the stress relaxation layer;
and cutting the material of the functional wearing layer according to the denture three-dimensional data to generate the functional wearing layer.
16. The method of claim 12,
the substrate supporting layer is made of zirconium oxide, gold alloy, titanium alloy, cobalt-chromium alloy or composite polyether-ether-ketone material;
the stress relaxation layer is made of ceramic, metal or high-strength polymer materials with porous structures; and/or the presence of a gas in the gas,
the functional wearing layer is made of composite resin, composite polyether-ether-ketone, glass ceramic, gold alloy, titanium alloy or soft cobalt-chromium alloy.
17. A denture creation system, comprising:
the three-dimensional printer is used for printing the substrate supporting layer at the bottom of the denture according to the denture three-dimensional data; and printing a stress relaxation layer with a porous structure above the substrate supporting layer according to the denture three-dimensional data; wherein, the stress relaxation layer is broken along with the chewing process of a patient, the supporting part of the porous structure is compressed;
and a functional wear layer generation device for generating a functional wear layer on the occlusal surface of the denture above the stress relaxation layer, wherein the functional wear layer is configured to be deformed by a portion subjected to a force exceeding a predetermined threshold.
18. The system of claim 17, further comprising:
the thermal treatment equipment is used for performing thermal treatment operation after the three-dimensional printer finishes printing the stress relaxation layer;
an injection device for injecting resin, low-melting-point low-hardness alloy and/or glass ceramic into the stress relaxation layer of the porous structure;
the functional wearing layer producing device is configured to produce the functional wearing layer above the stress relaxation layer including the resin, the low-melting-point low-hardness alloy, and/or the glass ceramic.
19. The system of claim 18, further comprising:
a surface tension treatment device for treating the stress relaxation layer with a surface tension treatment agent to improve surface wettability of the stress relaxation layer after the heat treatment operation is completed by the heat treatment device;
the injection device is used for injecting resin, low-melting-point and low-hardness alloy and/or glass ceramic into the stress relaxation layer treated by the surface tension treating agent after the surface tension treating device finishes the surface tension treatment.
20. The system of claim 17, 18 or 19, wherein the functional wear layer generation device is a three-dimensional printer for printing the functional wear layer from denture three-dimensional data over the stress-relieving layer;
or the like, or, alternatively,
the functional wear device includes:
material covering means for covering the material of the functional wear layer above the stress relaxation layer;
and the numerical control cutting equipment is used for cutting the material of the functional wearing layer according to the denture three-dimensional data to generate the functional wearing layer.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2017/072645 WO2018137182A1 (en) | 2017-01-25 | 2017-01-25 | Artificial tooth, and artificial tooth manufacturing method and device |
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| CN109561952B true CN109561952B (en) | 2021-08-17 |
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| CN110478071A (en) * | 2019-07-08 | 2019-11-22 | 山东建筑大学 | A kind of artificial tooth and its preparation method and application |
| CN112754704A (en) * | 2020-12-25 | 2021-05-07 | 上海岸和医疗器械有限公司 | Embedded zirconia false tooth and production process thereof |
| CN113440286B (en) * | 2021-07-08 | 2022-09-16 | 贵阳新洋诚义齿有限公司 | Self-adaptive buffering artificial tooth |
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| WO2014158012A1 (en) * | 2013-03-28 | 2014-10-02 | Universiti Malaya | A multi layered dental ceramic crown |
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| WO2014028505A1 (en) * | 2012-08-13 | 2014-02-20 | University Of Louisville Research Foundation, Inc. | Methods for fabricating dental prostheses |
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| CN206228445U (en) * | 2016-08-05 | 2017-06-09 | 深圳市美迪牙科器材有限公司 | A kind of novel wear resistant consolidates artificial tooth |
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| JPH07171168A (en) * | 1993-12-20 | 1995-07-11 | Noritake Co Ltd | Manufacture of porous layer core part for dental porcelain frame, manufacture of porous layer core part or dental porcelain frame, and dental porcelain frame |
| WO2014158012A1 (en) * | 2013-03-28 | 2014-10-02 | Universiti Malaya | A multi layered dental ceramic crown |
| JP2015137187A (en) * | 2014-01-20 | 2015-07-30 | 株式会社ニッカトー | Dental zirconia sintered body, crown frame, and bridge frame |
| CN205569105U (en) * | 2016-01-25 | 2016-09-14 | 上海亮直科技发展有限公司 | Compound artificial tooth |
| CN105919683A (en) * | 2016-04-28 | 2016-09-07 | 华南理工大学 | 3D printing-based bionic artificial tooth and manufacturing method thereof |
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| WO2018137182A8 (en) | 2018-08-30 |
| WO2018137182A1 (en) | 2018-08-02 |
| CN109561952A (en) | 2019-04-02 |
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